{ "contractName": "IERC20", "abi": [ { "anonymous": false, "inputs": [ { "indexed": true, "internalType": "address", "name": "owner", "type": "address" }, { "indexed": true, "internalType": "address", "name": "spender", "type": "address" }, { "indexed": false, "internalType": "uint256", "name": "value", "type": "uint256" } ], "name": "Approval", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": true, "internalType": "address", "name": "from", "type": "address" }, { "indexed": true, "internalType": "address", "name": "to", "type": "address" }, { "indexed": false, "internalType": "uint256", "name": "value", "type": "uint256" } ], "name": "Transfer", "type": "event" }, { "inputs": [], "name": "totalSupply", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" } ], "stateMutability": "view", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "account", "type": "address" } ], "name": "balanceOf", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" } ], "stateMutability": "view", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "recipient", "type": "address" }, { "internalType": "uint256", "name": "amount", "type": "uint256" } ], "name": "transfer", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "stateMutability": "nonpayable", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "owner", "type": "address" }, { "internalType": "address", "name": "spender", "type": "address" } ], "name": "allowance", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" } ], "stateMutability": "view", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "spender", "type": "address" }, { "internalType": "uint256", "name": "amount", "type": "uint256" } ], "name": "approve", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "stateMutability": "nonpayable", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "sender", "type": "address" }, { "internalType": "address", "name": "recipient", "type": "address" }, { "internalType": "uint256", "name": "amount", "type": "uint256" } ], "name": "transferFrom", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "stateMutability": "nonpayable", "type": "function" } ], "metadata": "{\"compiler\":{\"version\":\"0.8.0+commit.c7dfd78e\"},\"language\":\"Solidity\",\"output\":{\"abi\":[{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"owner\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"spender\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"value\",\"type\":\"uint256\"}],\"name\":\"Approval\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"from\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"value\",\"type\":\"uint256\"}],\"name\":\"Transfer\",\"type\":\"event\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"owner\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"spender\",\"type\":\"address\"}],\"name\":\"allowance\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"spender\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"amount\",\"type\":\"uint256\"}],\"name\":\"approve\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"account\",\"type\":\"address\"}],\"name\":\"balanceOf\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"totalSupply\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"recipient\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"amount\",\"type\":\"uint256\"}],\"name\":\"transfer\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"sender\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"recipient\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"amount\",\"type\":\"uint256\"}],\"name\":\"transferFrom\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"}],\"devdoc\":{\"details\":\"Interface of the ERC20 standard as defined in the EIP.\",\"events\":{\"Approval(address,address,uint256)\":{\"details\":\"Emitted when the allowance of a `spender` for an `owner` is set by a call to {approve}. `value` is the new allowance.\"},\"Transfer(address,address,uint256)\":{\"details\":\"Emitted when `value` tokens are moved from one account (`from`) to another (`to`). Note that `value` may be zero.\"}},\"kind\":\"dev\",\"methods\":{\"allowance(address,address)\":{\"details\":\"Returns the remaining number of tokens that `spender` will be allowed to spend on behalf of `owner` through {transferFrom}. This is zero by default. This value changes when {approve} or {transferFrom} are called.\"},\"approve(address,uint256)\":{\"details\":\"Sets `amount` as the allowance of `spender` over the caller's tokens. Returns a boolean value indicating whether the operation succeeded. IMPORTANT: Beware that changing an allowance with this method brings the risk that someone may use both the old and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards: https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 Emits an {Approval} event.\"},\"balanceOf(address)\":{\"details\":\"Returns the amount of tokens owned by `account`.\"},\"totalSupply()\":{\"details\":\"Returns the amount of tokens in existence.\"},\"transfer(address,uint256)\":{\"details\":\"Moves `amount` tokens from the caller's account to `recipient`. Returns a boolean value indicating whether the operation succeeded. Emits a {Transfer} event.\"},\"transferFrom(address,address,uint256)\":{\"details\":\"Moves `amount` tokens from `sender` to `recipient` using the allowance mechanism. `amount` is then deducted from the caller's allowance. Returns a boolean value indicating whether the operation succeeded. Emits a {Transfer} event.\"}},\"version\":1},\"userdoc\":{\"kind\":\"user\",\"methods\":{},\"version\":1}},\"settings\":{\"compilationTarget\":{\"/F/Assignment/aibcccc/AIBC/contracts/CustomERC20.sol\":\"IERC20\"},\"evmVersion\":\"istanbul\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\"},\"optimizer\":{\"enabled\":false,\"runs\":200},\"remappings\":[]},\"sources\":{\"/F/Assignment/aibcccc/AIBC/contracts/CustomERC20.sol\":{\"keccak256\":\"0x590becc03240efd5ad6cafab532e50b0575c241b8608362f4acd3f9a4b7e2ebb\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://e5d6fcb701f45883c773903ca07c3bee795e3b054fa47b82990d803e1755ee33\",\"dweb:/ipfs/QmQcN95LCMhwdiHFUw56r2yEv3KJoVoLk2X5TSE9gG6kcg\"]}},\"version\":1}", "bytecode": "0x", "deployedBytecode": "0x", "immutableReferences": {}, "generatedSources": [], "deployedGeneratedSources": [], "sourceMap": "", "deployedSourceMap": "", "source": "// SPDX-License-Identifier: MIT\r\n\r\npragma solidity ^0.8.0;\r\n\r\n/*\r\n * @dev Provides information about the current execution context, including the\r\n * sender of the transaction and its data. While these are generally available\r\n * via msg.sender and msg.data, they should not be accessed in such a direct\r\n * manner, since when dealing with meta-transactions the account sending and\r\n * paying for execution may not be the actual sender (as far as an application\r\n * is concerned).\r\n *\r\n * This contract is only required for intermediate, library-like contracts.\r\n */\r\nabstract contract Context {\r\n function _msgSender() internal view virtual returns (address) {\r\n return msg.sender;\r\n }\r\n\r\n function _msgData() internal view virtual returns (bytes calldata) {\r\n this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691\r\n return msg.data;\r\n }\r\n}\r\n\r\npragma solidity ^0.8.0;\r\n\r\n/**\r\n * @dev Interface of the ERC20 standard as defined in the EIP.\r\n */\r\ninterface IERC20 {\r\n /**\r\n * @dev Returns the amount of tokens in existence.\r\n */\r\n function totalSupply() external view returns (uint256);\r\n\r\n /**\r\n * @dev Returns the amount of tokens owned by `account`.\r\n */\r\n function balanceOf(address account) external view returns (uint256);\r\n\r\n /**\r\n * @dev Moves `amount` tokens from the caller's account to `recipient`.\r\n *\r\n * Returns a boolean value indicating whether the operation succeeded.\r\n *\r\n * Emits a {Transfer} event.\r\n */\r\n function transfer(address recipient, uint256 amount) external returns (bool);\r\n\r\n /**\r\n * @dev Returns the remaining number of tokens that `spender` will be\r\n * allowed to spend on behalf of `owner` through {transferFrom}. This is\r\n * zero by default.\r\n *\r\n * This value changes when {approve} or {transferFrom} are called.\r\n */\r\n function allowance(address owner, address spender) external view returns (uint256);\r\n\r\n /**\r\n * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.\r\n *\r\n * Returns a boolean value indicating whether the operation succeeded.\r\n *\r\n * IMPORTANT: Beware that changing an allowance with this method brings the risk\r\n * that someone may use both the old and the new allowance by unfortunate\r\n * transaction ordering. One possible solution to mitigate this race\r\n * condition is to first reduce the spender's allowance to 0 and set the\r\n * desired value afterwards:\r\n * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729\r\n *\r\n * Emits an {Approval} event.\r\n */\r\n function approve(address spender, uint256 amount) external returns (bool);\r\n\r\n /**\r\n * @dev Moves `amount` tokens from `sender` to `recipient` using the\r\n * allowance mechanism. `amount` is then deducted from the caller's\r\n * allowance.\r\n *\r\n * Returns a boolean value indicating whether the operation succeeded.\r\n *\r\n * Emits a {Transfer} event.\r\n */\r\n function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);\r\n\r\n /**\r\n * @dev Emitted when `value` tokens are moved from one account (`from`) to\r\n * another (`to`).\r\n *\r\n * Note that `value` may be zero.\r\n */\r\n event Transfer(address indexed from, address indexed to, uint256 value);\r\n\r\n /**\r\n * @dev Emitted when the allowance of a `spender` for an `owner` is set by\r\n * a call to {approve}. `value` is the new allowance.\r\n */\r\n event Approval(address indexed owner, address indexed spender, uint256 value);\r\n}\r\n\r\n\r\n\r\npragma solidity ^0.8.0;\r\n\r\n\r\n/**\r\n * @dev Interface for the optional metadata functions from the ERC20 standard.\r\n *\r\n * _Available since v4.1._\r\n */\r\ninterface IERC20Metadata is IERC20 {\r\n /**\r\n * @dev Returns the name of the token.\r\n */\r\n function name() external view returns (string memory);\r\n\r\n /**\r\n * @dev Returns the symbol of the token.\r\n */\r\n function symbol() external view returns (string memory);\r\n\r\n /**\r\n * @dev Returns the decimals places of the token.\r\n */\r\n function decimals() external view returns (uint8);\r\n}\r\n\r\n\r\n\r\npragma solidity ^0.8.0;\r\n\r\n\r\n/**\r\n * @dev Implementation of the {IERC20} interface.\r\n *\r\n * This implementation is agnostic to the way tokens are created. This means\r\n * that a supply mechanism has to be added in a derived contract using {_mint}.\r\n * For a generic mechanism see {ERC20PresetMinterPauser}.\r\n *\r\n * TIP: For a detailed writeup see our guide\r\n * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How\r\n * to implement supply mechanisms].\r\n *\r\n * We have followed general OpenZeppelin guidelines: functions revert instead\r\n * of returning `false` on failure. This behavior is nonetheless conventional\r\n * and does not conflict with the expectations of ERC20 applications.\r\n *\r\n * Additionally, an {Approval} event is emitted on calls to {transferFrom}.\r\n * This allows applications to reconstruct the allowance for all accounts just\r\n * by listening to said events. Other implementations of the EIP may not emit\r\n * these events, as it isn't required by the specification.\r\n *\r\n * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}\r\n * functions have been added to mitigate the well-known issues around setting\r\n * allowances. See {IERC20-approve}.\r\n */\r\ncontract ERC20 is Context, IERC20, IERC20Metadata {\r\n mapping (address => uint256) private _balances;\r\n\r\n mapping (address => mapping (address => uint256)) private _allowances;\r\n\r\n uint256 private _totalSupply;\r\n\r\n string private _name;\r\n string private _symbol;\r\n\r\n /**\r\n * @dev Sets the values for {name} and {symbol}.\r\n *\r\n * The defaut value of {decimals} is 18. To select a different value for\r\n * {decimals} you should overload it.\r\n *\r\n * All two of these values are immutable: they can only be set once during\r\n * construction.\r\n */\r\n constructor (string memory name_, string memory symbol_) {\r\n _name = name_;\r\n _symbol = symbol_;\r\n }\r\n\r\n /**\r\n * @dev Returns the name of the token.\r\n */\r\n function name() public view virtual override returns (string memory) {\r\n return _name;\r\n }\r\n\r\n /**\r\n * @dev Returns the symbol of the token, usually a shorter version of the\r\n * name.\r\n */\r\n function symbol() public view virtual override returns (string memory) {\r\n return _symbol;\r\n }\r\n\r\n /**\r\n * @dev Returns the number of decimals used to get its user representation.\r\n * For example, if `decimals` equals `2`, a balance of `505` tokens should\r\n * be displayed to a user as `5,05` (`505 / 10 ** 2`).\r\n *\r\n * Tokens usually opt for a value of 18, imitating the relationship between\r\n * Ether and Wei. This is the value {ERC20} uses, unless this function is\r\n * overridden;\r\n *\r\n * NOTE: This information is only used for _display_ purposes: it in\r\n * no way affects any of the arithmetic of the contract, including\r\n * {IERC20-balanceOf} and {IERC20-transfer}.\r\n */\r\n function decimals() public view virtual override returns (uint8) {\r\n return 0;\r\n }\r\n\r\n /**\r\n * @dev See {IERC20-totalSupply}.\r\n */\r\n function totalSupply() public view virtual override returns (uint256) {\r\n return _totalSupply;\r\n }\r\n\r\n /**\r\n * @dev See {IERC20-balanceOf}.\r\n */\r\n function balanceOf(address account) public view virtual override returns (uint256) {\r\n return _balances[account];\r\n }\r\n\r\n /**\r\n * @dev See {IERC20-transfer}.\r\n *\r\n * Requirements:\r\n *\r\n * - `recipient` cannot be the zero address.\r\n * - the caller must have a balance of at least `amount`.\r\n */\r\n function transfer(address recipient, uint256 amount) public virtual override returns (bool) {\r\n _transfer(_msgSender(), recipient, amount);\r\n return true;\r\n }\r\n\r\n /**\r\n * @dev See {IERC20-allowance}.\r\n */\r\n function allowance(address owner, address spender) public view virtual override returns (uint256) {\r\n return _allowances[owner][spender];\r\n }\r\n\r\n /**\r\n * @dev See {IERC20-approve}.\r\n *\r\n * Requirements:\r\n *\r\n * - `spender` cannot be the zero address.\r\n */\r\n function approve(address spender, uint256 amount) public virtual override returns (bool) {\r\n _approve(_msgSender(), spender, amount);\r\n return true;\r\n }\r\n\r\n /**\r\n * @dev See {IERC20-transferFrom}.\r\n *\r\n * Emits an {Approval} event indicating the updated allowance. This is not\r\n * required by the EIP. See the note at the beginning of {ERC20}.\r\n *\r\n * Requirements:\r\n *\r\n * - `sender` and `recipient` cannot be the zero address.\r\n * - `sender` must have a balance of at least `amount`.\r\n * - the caller must have allowance for ``sender``'s tokens of at least\r\n * `amount`.\r\n */\r\n function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {\r\n _transfer(sender, recipient, amount);\r\n\r\n uint256 currentAllowance = _allowances[sender][_msgSender()];\r\n require(currentAllowance >= amount, \"ERC20: transfer amount exceeds allowance\");\r\n _approve(sender, _msgSender(), currentAllowance - amount);\r\n\r\n return true;\r\n }\r\n\r\n /**\r\n * @dev Atomically increases the allowance granted to `spender` by the caller.\r\n *\r\n * This is an alternative to {approve} that can be used as a mitigation for\r\n * problems described in {IERC20-approve}.\r\n *\r\n * Emits an {Approval} event indicating the updated allowance.\r\n *\r\n * Requirements:\r\n *\r\n * - `spender` cannot be the zero address.\r\n */\r\n function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {\r\n _approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);\r\n return true;\r\n }\r\n\r\n /**\r\n * @dev Atomically decreases the allowance granted to `spender` by the caller.\r\n *\r\n * This is an alternative to {approve} that can be used as a mitigation for\r\n * problems described in {IERC20-approve}.\r\n *\r\n * Emits an {Approval} event indicating the updated allowance.\r\n *\r\n * Requirements:\r\n *\r\n * - `spender` cannot be the zero address.\r\n * - `spender` must have allowance for the caller of at least\r\n * `subtractedValue`.\r\n */\r\n function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {\r\n uint256 currentAllowance = _allowances[_msgSender()][spender];\r\n require(currentAllowance >= subtractedValue, \"ERC20: decreased allowance below zero\");\r\n _approve(_msgSender(), spender, currentAllowance - subtractedValue);\r\n\r\n return true;\r\n }\r\n\r\n /**\r\n * @dev Moves tokens `amount` from `sender` to `recipient`.\r\n *\r\n * This is internal function is equivalent to {transfer}, and can be used to\r\n * e.g. implement automatic token fees, slashing mechanisms, etc.\r\n *\r\n * Emits a {Transfer} event.\r\n *\r\n * Requirements:\r\n *\r\n * - `sender` cannot be the zero address.\r\n * - `recipient` cannot be the zero address.\r\n * - `sender` must have a balance of at least `amount`.\r\n */\r\n function _transfer(address sender, address recipient, uint256 amount) internal virtual {\r\n require(sender != address(0), \"ERC20: transfer from the zero address\");\r\n require(recipient != address(0), \"ERC20: transfer to the zero address\");\r\n\r\n _beforeTokenTransfer(sender, recipient, amount);\r\n\r\n uint256 senderBalance = _balances[sender];\r\n require(senderBalance >= amount, \"ERC20: transfer amount exceeds balance\");\r\n _balances[sender] = senderBalance - amount;\r\n _balances[recipient] += amount;\r\n\r\n emit Transfer(sender, recipient, amount);\r\n }\r\n\r\n /** @dev Creates `amount` tokens and assigns them to `account`, increasing\r\n * the total supply.\r\n *\r\n * Emits a {Transfer} event with `from` set to the zero address.\r\n *\r\n * Requirements:\r\n *\r\n * - `to` cannot be the zero address.\r\n */\r\n function _mint(address account, uint256 amount) internal virtual {\r\n require(account != address(0), \"ERC20: mint to the zero address\");\r\n\r\n _beforeTokenTransfer(address(0), account, amount);\r\n\r\n _totalSupply += amount;\r\n _balances[account] += amount;\r\n emit Transfer(address(0), account, amount);\r\n }\r\n\r\n /**\r\n * @dev Destroys `amount` tokens from `account`, reducing the\r\n * total supply.\r\n *\r\n * Emits a {Transfer} event with `to` set to the zero address.\r\n *\r\n * Requirements:\r\n *\r\n * - `account` cannot be the zero address.\r\n * - `account` must have at least `amount` tokens.\r\n */\r\n function _burn(address account, uint256 amount) internal virtual {\r\n require(account != address(0), \"ERC20: burn from the zero address\");\r\n\r\n _beforeTokenTransfer(account, address(0), amount);\r\n\r\n uint256 accountBalance = _balances[account];\r\n require(accountBalance >= amount, \"ERC20: burn amount exceeds balance\");\r\n _balances[account] = accountBalance - amount;\r\n _totalSupply -= amount;\r\n\r\n emit Transfer(account, address(0), amount);\r\n }\r\n\r\n /**\r\n * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.\r\n *\r\n * This internal function is equivalent to `approve`, and can be used to\r\n * e.g. set automatic allowances for certain subsystems, etc.\r\n *\r\n * Emits an {Approval} event.\r\n *\r\n * Requirements:\r\n *\r\n * - `owner` cannot be the zero address.\r\n * - `spender` cannot be the zero address.\r\n */\r\n function _approve(address owner, address spender, uint256 amount) internal virtual {\r\n require(owner != address(0), \"ERC20: approve from the zero address\");\r\n require(spender != address(0), \"ERC20: approve to the zero address\");\r\n\r\n _allowances[owner][spender] = amount;\r\n emit Approval(owner, spender, amount);\r\n }\r\n\r\n /**\r\n * @dev Hook that is called before any transfer of tokens. This includes\r\n * minting and burning.\r\n *\r\n * Calling conditions:\r\n *\r\n * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens\r\n * will be to transferred to `to`.\r\n * - when `from` is zero, `amount` tokens will be minted for `to`.\r\n * - when `to` is zero, `amount` of ``from``'s tokens will be burned.\r\n * - `from` and `to` are never both zero.\r\n *\r\n * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].\r\n */\r\n function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }\r\n}\r\n\r\n\r\npragma solidity ^0.8.0;\r\n\r\n\r\n/**\r\n * @dev Extension of {ERC20} that allows token holders to destroy both their own\r\n * tokens and those that they have an allowance for, in a way that can be\r\n * recognized off-chain (via event analysis).\r\n */\r\nabstract contract ERC20Burnable is Context, ERC20 {\r\n /**\r\n * @dev Destroys `amount` tokens from the caller.\r\n *\r\n * See {ERC20-_burn}.\r\n */\r\n function burn(uint256 amount) public virtual {\r\n _burn(_msgSender(), amount);\r\n }\r\n\r\n /**\r\n * @dev Destroys `amount` tokens from `account`, deducting from the caller's\r\n * allowance.\r\n *\r\n * See {ERC20-_burn} and {ERC20-allowance}.\r\n *\r\n * Requirements:\r\n *\r\n * - the caller must have allowance for ``accounts``'s tokens of at least\r\n * `amount`.\r\n */\r\n function burnFrom(address account, uint256 amount) public virtual {\r\n uint256 currentAllowance = allowance(account, _msgSender());\r\n require(currentAllowance >= amount, \"ERC20: burn amount exceeds allowance\");\r\n _approve(account, _msgSender(), currentAllowance - amount);\r\n _burn(account, amount);\r\n }\r\n}\r\n\r\npragma solidity ^0.8.0;\r\n\r\n/**\r\n * @dev {ERC20} token, including:\r\n *\r\n * - Preminted initial supply\r\n * - Ability for holders to burn (destroy) their tokens\r\n * - No access control mechanism (for minting/pausing) and hence no governance\r\n *\r\n * This contract uses {ERC20Burnable} to include burn capabilities - head to\r\n * its documentation for details.\r\n *\r\n * _Available since v3.4._\r\n */\r\ncontract ERC20PresetFixedSupply is ERC20Burnable {\r\n /**\r\n * @dev Mints `initialSupply` amount of token and transfers them to `owner`.\r\n *\r\n * See {ERC20-constructor}.\r\n */\r\n constructor(\r\n string memory name,\r\n string memory symbol,\r\n uint256 initialSupply,\r\n address owner\r\n ) ERC20(name, symbol) {\r\n _mint(owner, initialSupply);\r\n }\r\n}\r\n\r\n\r\npragma solidity 0.8.0;\r\ncontract CustomERC20 is ERC20PresetFixedSupply {\r\n constructor(string memory _name, string memory _symbol, uint256 _supply)\r\n ERC20PresetFixedSupply(_name, _symbol, _supply,msg.sender)\r\n public\r\n {\r\n }\r\n}", "sourcePath": "F:/Assignment/aibcccc/AIBC/contracts/CustomERC20.sol", "ast": { "absolutePath": "/F/Assignment/aibcccc/AIBC/contracts/CustomERC20.sol", "exportedSymbols": { "Context": [ 1190 ], "CustomERC20": [ 1899 ], "ERC20": [ 1793 ], "ERC20Burnable": [ 1851 ], "ERC20PresetFixedSupply": [ 1878 ], "IERC20": [ 1267 ], "IERC20Metadata": [ 1290 ] }, "id": 1900, "license": "MIT", "nodeType": "SourceUnit", "nodes": [ { "id": 1169, "literals": [ "solidity", "^", "0.8", ".0" ], "nodeType": "PragmaDirective", "src": "35:23:2" }, { "abstract": true, "baseContracts": [], "contractDependencies": [], "contractKind": "contract", "fullyImplemented": true, "id": 1190, "linearizedBaseContracts": [ 1190 ], "name": "Context", "nodeType": "ContractDefinition", "nodes": [ { "body": { "id": 1177, "nodeType": "Block", "src": "663:36:2", "statements": [ { "expression": { "expression": { "id": 1174, "name": "msg", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4294967281, "src": "681:3:2", "typeDescriptions": { "typeIdentifier": "t_magic_message", "typeString": "msg" } }, "id": 1175, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sender", "nodeType": "MemberAccess", "src": "681:10:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "functionReturnParameters": 1173, "id": 1176, "nodeType": "Return", "src": "674:17:2" } ] }, "id": 1178, "implemented": true, "kind": "function", "modifiers": [], "name": "_msgSender", "nodeType": "FunctionDefinition", "parameters": { "id": 1170, "nodeType": "ParameterList", "parameters": [], "src": "620:2:2" }, "returnParameters": { "id": 1173, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1172, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 1178, "src": "654:7:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1171, "name": "address", "nodeType": "ElementaryTypeName", "src": "654:7:2", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" } ], "src": "653:9:2" }, "scope": 1190, "src": "601:98:2", "stateMutability": "view", "virtual": true, "visibility": "internal" }, { "body": { "id": 1188, "nodeType": "Block", "src": "774:168:2", "statements": [ { "expression": { "id": 1183, "name": "this", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4294967268, "src": "785:4:2", "typeDescriptions": { "typeIdentifier": "t_contract$_Context_$1190", "typeString": "contract Context" } }, "id": 1184, "nodeType": "ExpressionStatement", "src": "785:4:2" }, { "expression": { "expression": { "id": 1185, "name": "msg", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4294967281, "src": "926:3:2", "typeDescriptions": { "typeIdentifier": "t_magic_message", "typeString": "msg" } }, "id": 1186, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "data", "nodeType": "MemberAccess", "src": "926:8:2", "typeDescriptions": { "typeIdentifier": "t_bytes_calldata_ptr", "typeString": "bytes calldata" } }, "functionReturnParameters": 1182, "id": 1187, "nodeType": "Return", "src": "919:15:2" } ] }, "id": 1189, "implemented": true, "kind": "function", "modifiers": [], "name": "_msgData", "nodeType": "FunctionDefinition", "parameters": { "id": 1179, "nodeType": "ParameterList", "parameters": [], "src": "724:2:2" }, "returnParameters": { "id": 1182, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1181, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 1189, "src": "758:14:2", "stateVariable": false, "storageLocation": "calldata", "typeDescriptions": { "typeIdentifier": "t_bytes_calldata_ptr", "typeString": "bytes" }, "typeName": { "id": 1180, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "758:5:2", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "visibility": "internal" } ], "src": "757:16:2" }, "scope": 1190, "src": "707:235:2", "stateMutability": "view", "virtual": true, "visibility": "internal" } ], "scope": 1900, "src": "568:377:2" }, { "id": 1191, "literals": [ "solidity", "^", "0.8", ".0" ], "nodeType": "PragmaDirective", "src": "949:23:2" }, { "abstract": false, "baseContracts": [], "contractDependencies": [], "contractKind": "interface", "documentation": { "id": 1192, "nodeType": "StructuredDocumentation", "src": "976:72:2", "text": " @dev Interface of the ERC20 standard as defined in the EIP." }, "fullyImplemented": false, "id": 1267, "linearizedBaseContracts": [ 1267 ], "name": "IERC20", "nodeType": "ContractDefinition", "nodes": [ { "documentation": { "id": 1193, "nodeType": "StructuredDocumentation", "src": "1074:68:2", "text": " @dev Returns the amount of tokens in existence." }, "functionSelector": "18160ddd", "id": 1198, "implemented": false, "kind": "function", "modifiers": [], "name": "totalSupply", "nodeType": "FunctionDefinition", "parameters": { "id": 1194, "nodeType": "ParameterList", "parameters": [], "src": "1168:2:2" }, "returnParameters": { "id": 1197, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1196, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 1198, "src": "1194:7:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1195, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1194:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "1193:9:2" }, "scope": 1267, "src": "1148:55:2", "stateMutability": "view", "virtual": false, "visibility": "external" }, { "documentation": { "id": 1199, "nodeType": "StructuredDocumentation", "src": "1211:74:2", "text": " @dev Returns the amount of tokens owned by `account`." }, "functionSelector": "70a08231", "id": 1206, "implemented": false, "kind": "function", "modifiers": [], "name": "balanceOf", "nodeType": "FunctionDefinition", "parameters": { "id": 1202, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1201, "mutability": "mutable", "name": "account", "nodeType": "VariableDeclaration", "scope": 1206, "src": "1310:15:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1200, "name": "address", "nodeType": "ElementaryTypeName", "src": "1310:7:2", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" } ], "src": "1309:17:2" }, "returnParameters": { "id": 1205, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1204, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 1206, "src": "1350:7:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1203, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1350:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "1349:9:2" }, "scope": 1267, "src": "1291:68:2", "stateMutability": "view", "virtual": false, "visibility": "external" }, { "documentation": { "id": 1207, "nodeType": "StructuredDocumentation", "src": "1367:215:2", "text": " @dev Moves `amount` tokens from the caller's account to `recipient`.\n Returns a boolean value indicating whether the operation succeeded.\n Emits a {Transfer} event." }, "functionSelector": "a9059cbb", "id": 1216, "implemented": false, "kind": "function", "modifiers": [], "name": "transfer", "nodeType": "FunctionDefinition", "parameters": { "id": 1212, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1209, "mutability": "mutable", "name": "recipient", "nodeType": "VariableDeclaration", "scope": 1216, "src": "1606:17:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1208, "name": "address", "nodeType": "ElementaryTypeName", "src": "1606:7:2", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1211, "mutability": "mutable", "name": "amount", "nodeType": "VariableDeclaration", "scope": 1216, "src": "1625:14:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1210, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1625:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "1605:35:2" }, "returnParameters": { "id": 1215, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1214, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 1216, "src": "1659:4:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 1213, "name": "bool", "nodeType": "ElementaryTypeName", "src": "1659:4:2", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "visibility": "internal" } ], "src": "1658:6:2" }, "scope": 1267, "src": "1588:77:2", "stateMutability": "nonpayable", "virtual": false, "visibility": "external" }, { "documentation": { "id": 1217, "nodeType": "StructuredDocumentation", "src": "1673:270:2", "text": " @dev Returns the remaining number of tokens that `spender` will be\n allowed to spend on behalf of `owner` through {transferFrom}. This is\n zero by default.\n This value changes when {approve} or {transferFrom} are called." }, "functionSelector": "dd62ed3e", "id": 1226, "implemented": false, "kind": "function", "modifiers": [], "name": "allowance", "nodeType": "FunctionDefinition", "parameters": { "id": 1222, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1219, "mutability": "mutable", "name": "owner", "nodeType": "VariableDeclaration", "scope": 1226, "src": "1968:13:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1218, "name": "address", "nodeType": "ElementaryTypeName", "src": "1968:7:2", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1221, "mutability": "mutable", "name": "spender", "nodeType": "VariableDeclaration", "scope": 1226, "src": "1983:15:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1220, "name": "address", "nodeType": "ElementaryTypeName", "src": "1983:7:2", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" } ], "src": "1967:32:2" }, "returnParameters": { "id": 1225, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1224, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 1226, "src": "2023:7:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1223, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "2023:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "2022:9:2" }, "scope": 1267, "src": "1949:83:2", "stateMutability": "view", "virtual": false, "visibility": "external" }, { "documentation": { "id": 1227, "nodeType": "StructuredDocumentation", "src": "2040:655:2", "text": " @dev Sets `amount` as the allowance of `spender` over the caller's tokens.\n Returns a boolean value indicating whether the operation succeeded.\n IMPORTANT: Beware that changing an allowance with this method brings the risk\n that someone may use both the old and the new allowance by unfortunate\n transaction ordering. One possible solution to mitigate this race\n condition is to first reduce the spender's allowance to 0 and set the\n desired value afterwards:\n https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729\n Emits an {Approval} event." }, "functionSelector": "095ea7b3", "id": 1236, "implemented": false, "kind": "function", "modifiers": [], "name": "approve", "nodeType": "FunctionDefinition", "parameters": { "id": 1232, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1229, "mutability": "mutable", "name": "spender", "nodeType": "VariableDeclaration", "scope": 1236, "src": "2718:15:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1228, "name": "address", "nodeType": "ElementaryTypeName", "src": "2718:7:2", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1231, "mutability": "mutable", "name": "amount", "nodeType": "VariableDeclaration", "scope": 1236, "src": "2735:14:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1230, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "2735:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "2717:33:2" }, "returnParameters": { "id": 1235, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1234, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 1236, "src": "2769:4:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 1233, "name": "bool", "nodeType": "ElementaryTypeName", "src": "2769:4:2", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "visibility": "internal" } ], "src": "2768:6:2" }, "scope": 1267, "src": "2701:74:2", "stateMutability": "nonpayable", "virtual": false, "visibility": "external" }, { "documentation": { "id": 1237, "nodeType": "StructuredDocumentation", "src": "2783:304:2", "text": " @dev Moves `amount` tokens from `sender` to `recipient` using the\n allowance mechanism. `amount` is then deducted from the caller's\n allowance.\n Returns a boolean value indicating whether the operation succeeded.\n Emits a {Transfer} event." }, "functionSelector": "23b872dd", "id": 1248, "implemented": false, "kind": "function", "modifiers": [], "name": "transferFrom", "nodeType": "FunctionDefinition", "parameters": { "id": 1244, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1239, "mutability": "mutable", "name": "sender", "nodeType": "VariableDeclaration", "scope": 1248, "src": "3115:14:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1238, "name": "address", "nodeType": "ElementaryTypeName", "src": "3115:7:2", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1241, "mutability": "mutable", "name": "recipient", "nodeType": "VariableDeclaration", "scope": 1248, "src": "3131:17:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1240, "name": "address", "nodeType": "ElementaryTypeName", "src": "3131:7:2", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1243, "mutability": "mutable", "name": "amount", "nodeType": "VariableDeclaration", "scope": 1248, "src": "3150:14:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1242, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3150:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "3114:51:2" }, "returnParameters": { "id": 1247, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1246, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 1248, "src": "3184:4:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 1245, "name": "bool", "nodeType": "ElementaryTypeName", "src": "3184:4:2", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "visibility": "internal" } ], "src": "3183:6:2" }, "scope": 1267, "src": "3093:97:2", "stateMutability": "nonpayable", "virtual": false, "visibility": "external" }, { "anonymous": false, "documentation": { "id": 1249, "nodeType": "StructuredDocumentation", "src": "3198:163:2", "text": " @dev Emitted when `value` tokens are moved from one account (`from`) to\n another (`to`).\n Note that `value` may be zero." }, "id": 1257, "name": "Transfer", "nodeType": "EventDefinition", "parameters": { "id": 1256, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1251, "indexed": true, "mutability": "mutable", "name": "from", "nodeType": "VariableDeclaration", "scope": 1257, "src": "3382:20:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1250, "name": "address", "nodeType": "ElementaryTypeName", "src": "3382:7:2", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1253, "indexed": true, "mutability": "mutable", "name": "to", "nodeType": "VariableDeclaration", "scope": 1257, "src": "3404:18:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1252, "name": "address", "nodeType": "ElementaryTypeName", "src": "3404:7:2", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1255, "indexed": false, "mutability": "mutable", "name": "value", "nodeType": "VariableDeclaration", "scope": 1257, "src": "3424:13:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1254, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3424:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "3381:57:2" }, "src": "3367:72:2" }, { "anonymous": false, "documentation": { "id": 1258, "nodeType": "StructuredDocumentation", "src": "3447:151:2", "text": " @dev Emitted when the allowance of a `spender` for an `owner` is set by\n a call to {approve}. `value` is the new allowance." }, "id": 1266, "name": "Approval", "nodeType": "EventDefinition", "parameters": { "id": 1265, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1260, "indexed": true, "mutability": "mutable", "name": "owner", "nodeType": "VariableDeclaration", "scope": 1266, "src": "3619:21:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1259, "name": "address", "nodeType": "ElementaryTypeName", "src": "3619:7:2", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1262, "indexed": true, "mutability": "mutable", "name": "spender", "nodeType": "VariableDeclaration", "scope": 1266, "src": "3642:23:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1261, "name": "address", "nodeType": "ElementaryTypeName", "src": "3642:7:2", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1264, "indexed": false, "mutability": "mutable", "name": "value", "nodeType": "VariableDeclaration", "scope": 1266, "src": "3667:13:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1263, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3667:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "3618:63:2" }, "src": "3604:78:2" } ], "scope": 1900, "src": "1050:2635:2" }, { "id": 1268, "literals": [ "solidity", "^", "0.8", ".0" ], "nodeType": "PragmaDirective", "src": "3693:23:2" }, { "abstract": false, "baseContracts": [ { "baseName": { "id": 1270, "name": "IERC20", "nodeType": "IdentifierPath", "referencedDeclaration": 1267, "src": "3872:6:2" }, "id": 1271, "nodeType": "InheritanceSpecifier", "src": "3872:6:2" } ], "contractDependencies": [ 1267 ], "contractKind": "interface", "documentation": { "id": 1269, "nodeType": "StructuredDocumentation", "src": "3722:120:2", "text": " @dev Interface for the optional metadata functions from the ERC20 standard.\n _Available since v4.1._" }, "fullyImplemented": false, "id": 1290, "linearizedBaseContracts": [ 1290, 1267 ], "name": "IERC20Metadata", "nodeType": "ContractDefinition", "nodes": [ { "documentation": { "id": 1272, "nodeType": "StructuredDocumentation", "src": "3886:56:2", "text": " @dev Returns the name of the token." }, "functionSelector": "06fdde03", "id": 1277, "implemented": false, "kind": "function", "modifiers": [], "name": "name", "nodeType": "FunctionDefinition", "parameters": { "id": 1273, "nodeType": "ParameterList", "parameters": [], "src": "3961:2:2" }, "returnParameters": { "id": 1276, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1275, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 1277, "src": "3987:13:2", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string" }, "typeName": { "id": 1274, "name": "string", "nodeType": "ElementaryTypeName", "src": "3987:6:2", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "visibility": "internal" } ], "src": "3986:15:2" }, "scope": 1290, "src": "3948:54:2", "stateMutability": "view", "virtual": false, "visibility": "external" }, { "documentation": { "id": 1278, "nodeType": "StructuredDocumentation", "src": "4010:58:2", "text": " @dev Returns the symbol of the token." }, "functionSelector": "95d89b41", "id": 1283, "implemented": false, "kind": "function", "modifiers": [], "name": "symbol", "nodeType": "FunctionDefinition", "parameters": { "id": 1279, "nodeType": "ParameterList", "parameters": [], "src": "4089:2:2" }, "returnParameters": { "id": 1282, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1281, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 1283, "src": "4115:13:2", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string" }, "typeName": { "id": 1280, "name": "string", "nodeType": "ElementaryTypeName", "src": "4115:6:2", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "visibility": "internal" } ], "src": "4114:15:2" }, "scope": 1290, "src": "4074:56:2", "stateMutability": "view", "virtual": false, "visibility": "external" }, { "documentation": { "id": 1284, "nodeType": "StructuredDocumentation", "src": "4138:67:2", "text": " @dev Returns the decimals places of the token." }, "functionSelector": "313ce567", "id": 1289, "implemented": false, "kind": "function", "modifiers": [], "name": "decimals", "nodeType": "FunctionDefinition", "parameters": { "id": 1285, "nodeType": "ParameterList", "parameters": [], "src": "4228:2:2" }, "returnParameters": { "id": 1288, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1287, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 1289, "src": "4254:5:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" }, "typeName": { "id": 1286, "name": "uint8", "nodeType": "ElementaryTypeName", "src": "4254:5:2", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "visibility": "internal" } ], "src": "4253:7:2" }, "scope": 1290, "src": "4211:50:2", "stateMutability": "view", "virtual": false, "visibility": "external" } ], "scope": 1900, "src": "3844:420:2" }, { "id": 1291, "literals": [ "solidity", "^", "0.8", ".0" ], "nodeType": "PragmaDirective", "src": "4272:23:2" }, { "abstract": false, "baseContracts": [ { "baseName": { "id": 1293, "name": "Context", "nodeType": "IdentifierPath", "referencedDeclaration": 1190, "src": "5506:7:2" }, "id": 1294, "nodeType": "InheritanceSpecifier", "src": "5506:7:2" }, { "baseName": { "id": 1295, "name": "IERC20", "nodeType": "IdentifierPath", "referencedDeclaration": 1267, "src": "5515:6:2" }, "id": 1296, "nodeType": "InheritanceSpecifier", "src": "5515:6:2" }, { "baseName": { "id": 1297, "name": "IERC20Metadata", "nodeType": "IdentifierPath", "referencedDeclaration": 1290, "src": "5523:14:2" }, "id": 1298, "nodeType": "InheritanceSpecifier", "src": "5523:14:2" } ], "contractDependencies": [ 1190, 1267, 1290 ], "contractKind": "contract", "documentation": { "id": 1292, "nodeType": "StructuredDocumentation", "src": "4301:1185:2", "text": " @dev Implementation of the {IERC20} interface.\n This implementation is agnostic to the way tokens are created. This means\n that a supply mechanism has to be added in a derived contract using {_mint}.\n For a generic mechanism see {ERC20PresetMinterPauser}.\n TIP: For a detailed writeup see our guide\n https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How\n to implement supply mechanisms].\n We have followed general OpenZeppelin guidelines: functions revert instead\n of returning `false` on failure. This behavior is nonetheless conventional\n and does not conflict with the expectations of ERC20 applications.\n Additionally, an {Approval} event is emitted on calls to {transferFrom}.\n This allows applications to reconstruct the allowance for all accounts just\n by listening to said events. Other implementations of the EIP may not emit\n these events, as it isn't required by the specification.\n Finally, the non-standard {decreaseAllowance} and {increaseAllowance}\n functions have been added to mitigate the well-known issues around setting\n allowances. See {IERC20-approve}." }, "fullyImplemented": true, "id": 1793, "linearizedBaseContracts": [ 1793, 1290, 1267, 1190 ], "name": "ERC20", "nodeType": "ContractDefinition", "nodes": [ { "constant": false, "id": 1302, "mutability": "mutable", "name": "_balances", "nodeType": "VariableDeclaration", "scope": 1793, "src": "5545:46:2", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" }, "typeName": { "id": 1301, "keyType": { "id": 1299, "name": "address", "nodeType": "ElementaryTypeName", "src": "5554:7:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Mapping", "src": "5545:28:2", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" }, "valueType": { "id": 1300, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "5565:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } }, "visibility": "private" }, { "constant": false, "id": 1308, "mutability": "mutable", "name": "_allowances", "nodeType": "VariableDeclaration", "scope": 1793, "src": "5600:69:2", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" }, "typeName": { "id": 1307, "keyType": { "id": 1303, "name": "address", "nodeType": "ElementaryTypeName", "src": "5609:7:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Mapping", "src": "5600:49:2", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" }, "valueType": { "id": 1306, "keyType": { "id": 1304, "name": "address", "nodeType": "ElementaryTypeName", "src": "5629:7:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Mapping", "src": "5620:28:2", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" }, "valueType": { "id": 1305, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "5640:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } } }, "visibility": "private" }, { "constant": false, "id": 1310, "mutability": "mutable", "name": "_totalSupply", "nodeType": "VariableDeclaration", "scope": 1793, "src": "5678:28:2", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1309, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "5678:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "private" }, { "constant": false, "id": 1312, "mutability": "mutable", "name": "_name", "nodeType": "VariableDeclaration", "scope": 1793, "src": "5715:20:2", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_string_storage", "typeString": "string" }, "typeName": { "id": 1311, "name": "string", "nodeType": "ElementaryTypeName", "src": "5715:6:2", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "visibility": "private" }, { "constant": false, "id": 1314, "mutability": "mutable", "name": "_symbol", "nodeType": "VariableDeclaration", "scope": 1793, "src": "5742:22:2", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_string_storage", "typeString": "string" }, "typeName": { "id": 1313, "name": "string", "nodeType": "ElementaryTypeName", "src": "5742:6:2", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "visibility": "private" }, { "body": { "id": 1330, "nodeType": "Block", "src": "6141:60:2", "statements": [ { "expression": { "id": 1324, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "id": 1322, "name": "_name", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1312, "src": "6152:5:2", "typeDescriptions": { "typeIdentifier": "t_string_storage", "typeString": "string storage ref" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "id": 1323, "name": "name_", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1317, "src": "6160:5:2", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string memory" } }, "src": "6152:13:2", "typeDescriptions": { "typeIdentifier": "t_string_storage", "typeString": "string storage ref" } }, "id": 1325, "nodeType": "ExpressionStatement", "src": "6152:13:2" }, { "expression": { "id": 1328, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "id": 1326, "name": "_symbol", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1314, "src": "6176:7:2", "typeDescriptions": { "typeIdentifier": "t_string_storage", "typeString": "string storage ref" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "id": 1327, "name": "symbol_", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1319, "src": "6186:7:2", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string memory" } }, "src": "6176:17:2", "typeDescriptions": { "typeIdentifier": "t_string_storage", "typeString": "string storage ref" } }, "id": 1329, "nodeType": "ExpressionStatement", "src": "6176:17:2" } ] }, "documentation": { "id": 1315, "nodeType": "StructuredDocumentation", "src": "5773:305:2", "text": " @dev Sets the values for {name} and {symbol}.\n The defaut value of {decimals} is 18. To select a different value for\n {decimals} you should overload it.\n All two of these values are immutable: they can only be set once during\n construction." }, "id": 1331, "implemented": true, "kind": "constructor", "modifiers": [], "name": "", "nodeType": "FunctionDefinition", "parameters": { "id": 1320, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1317, "mutability": "mutable", "name": "name_", "nodeType": "VariableDeclaration", "scope": 1331, "src": "6097:19:2", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string" }, "typeName": { "id": 1316, "name": "string", "nodeType": "ElementaryTypeName", "src": "6097:6:2", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "visibility": "internal" }, { "constant": false, "id": 1319, "mutability": "mutable", "name": "symbol_", "nodeType": "VariableDeclaration", "scope": 1331, "src": "6118:21:2", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string" }, "typeName": { "id": 1318, "name": "string", "nodeType": "ElementaryTypeName", "src": "6118:6:2", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "visibility": "internal" } ], "src": "6096:44:2" }, "returnParameters": { "id": 1321, "nodeType": "ParameterList", "parameters": [], "src": "6141:0:2" }, "scope": 1793, "src": "6084:117:2", "stateMutability": "nonpayable", "virtual": false, "visibility": "public" }, { "baseFunctions": [ 1277 ], "body": { "id": 1340, "nodeType": "Block", "src": "6340:31:2", "statements": [ { "expression": { "id": 1338, "name": "_name", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1312, "src": "6358:5:2", "typeDescriptions": { "typeIdentifier": "t_string_storage", "typeString": "string storage ref" } }, "functionReturnParameters": 1337, "id": 1339, "nodeType": "Return", "src": "6351:12:2" } ] }, "documentation": { "id": 1332, "nodeType": "StructuredDocumentation", "src": "6209:56:2", "text": " @dev Returns the name of the token." }, "functionSelector": "06fdde03", "id": 1341, "implemented": true, "kind": "function", "modifiers": [], "name": "name", "nodeType": "FunctionDefinition", "overrides": { "id": 1334, "nodeType": "OverrideSpecifier", "overrides": [], "src": "6307:8:2" }, "parameters": { "id": 1333, "nodeType": "ParameterList", "parameters": [], "src": "6284:2:2" }, "returnParameters": { "id": 1337, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1336, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 1341, "src": "6325:13:2", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string" }, "typeName": { "id": 1335, "name": "string", "nodeType": "ElementaryTypeName", "src": "6325:6:2", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "visibility": "internal" } ], "src": "6324:15:2" }, "scope": 1793, "src": "6271:100:2", "stateMutability": "view", "virtual": true, "visibility": "public" }, { "baseFunctions": [ 1283 ], "body": { "id": 1350, "nodeType": "Block", "src": "6561:33:2", "statements": [ { "expression": { "id": 1348, "name": "_symbol", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1314, "src": "6579:7:2", "typeDescriptions": { "typeIdentifier": "t_string_storage", "typeString": "string storage ref" } }, "functionReturnParameters": 1347, "id": 1349, "nodeType": "Return", "src": "6572:14:2" } ] }, "documentation": { "id": 1342, "nodeType": "StructuredDocumentation", "src": "6379:105:2", "text": " @dev Returns the symbol of the token, usually a shorter version of the\n name." }, "functionSelector": "95d89b41", "id": 1351, "implemented": true, "kind": "function", "modifiers": [], "name": "symbol", "nodeType": "FunctionDefinition", "overrides": { "id": 1344, "nodeType": "OverrideSpecifier", "overrides": [], "src": "6528:8:2" }, "parameters": { "id": 1343, "nodeType": "ParameterList", "parameters": [], "src": "6505:2:2" }, "returnParameters": { "id": 1347, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1346, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 1351, "src": "6546:13:2", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string" }, "typeName": { "id": 1345, "name": "string", "nodeType": "ElementaryTypeName", "src": "6546:6:2", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "visibility": "internal" } ], "src": "6545:15:2" }, "scope": 1793, "src": "6490:104:2", "stateMutability": "view", "virtual": true, "visibility": "public" }, { "baseFunctions": [ 1289 ], "body": { "id": 1360, "nodeType": "Block", "src": "7298:27:2", "statements": [ { "expression": { "hexValue": "30", "id": 1358, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "7316:1:2", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" }, "functionReturnParameters": 1357, "id": 1359, "nodeType": "Return", "src": "7309:8:2" } ] }, "documentation": { "id": 1352, "nodeType": "StructuredDocumentation", "src": "6602:625:2", "text": " @dev Returns the number of decimals used to get its user representation.\n For example, if `decimals` equals `2`, a balance of `505` tokens should\n be displayed to a user as `5,05` (`505 / 10 ** 2`).\n Tokens usually opt for a value of 18, imitating the relationship between\n Ether and Wei. This is the value {ERC20} uses, unless this function is\n overridden;\n NOTE: This information is only used for _display_ purposes: it in\n no way affects any of the arithmetic of the contract, including\n {IERC20-balanceOf} and {IERC20-transfer}." }, "functionSelector": "313ce567", "id": 1361, "implemented": true, "kind": "function", "modifiers": [], "name": "decimals", "nodeType": "FunctionDefinition", "overrides": { "id": 1354, "nodeType": "OverrideSpecifier", "overrides": [], "src": "7273:8:2" }, "parameters": { "id": 1353, "nodeType": "ParameterList", "parameters": [], "src": "7250:2:2" }, "returnParameters": { "id": 1357, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1356, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 1361, "src": "7291:5:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" }, "typeName": { "id": 1355, "name": "uint8", "nodeType": "ElementaryTypeName", "src": "7291:5:2", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "visibility": "internal" } ], "src": "7290:7:2" }, "scope": 1793, "src": "7233:92:2", "stateMutability": "view", "virtual": true, "visibility": "public" }, { "baseFunctions": [ 1198 ], "body": { "id": 1370, "nodeType": "Block", "src": "7460:38:2", "statements": [ { "expression": { "id": 1368, "name": "_totalSupply", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1310, "src": "7478:12:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "functionReturnParameters": 1367, "id": 1369, "nodeType": "Return", "src": "7471:19:2" } ] }, "documentation": { "id": 1362, "nodeType": "StructuredDocumentation", "src": "7333:51:2", "text": " @dev See {IERC20-totalSupply}." }, "functionSelector": "18160ddd", "id": 1371, "implemented": true, "kind": "function", "modifiers": [], "name": "totalSupply", "nodeType": "FunctionDefinition", "overrides": { "id": 1364, "nodeType": "OverrideSpecifier", "overrides": [], "src": "7433:8:2" }, "parameters": { "id": 1363, "nodeType": "ParameterList", "parameters": [], "src": "7410:2:2" }, "returnParameters": { "id": 1367, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1366, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 1371, "src": "7451:7:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1365, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "7451:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "7450:9:2" }, "scope": 1793, "src": "7390:108:2", "stateMutability": "view", "virtual": true, "visibility": "public" }, { "baseFunctions": [ 1206 ], "body": { "id": 1384, "nodeType": "Block", "src": "7644:44:2", "statements": [ { "expression": { "baseExpression": { "id": 1380, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1302, "src": "7662:9:2", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 1382, "indexExpression": { "id": 1381, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1374, "src": "7672:7:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "7662:18:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "functionReturnParameters": 1379, "id": 1383, "nodeType": "Return", "src": "7655:25:2" } ] }, "documentation": { "id": 1372, "nodeType": "StructuredDocumentation", "src": "7506:49:2", "text": " @dev See {IERC20-balanceOf}." }, "functionSelector": "70a08231", "id": 1385, "implemented": true, "kind": "function", "modifiers": [], "name": "balanceOf", "nodeType": "FunctionDefinition", "overrides": { "id": 1376, "nodeType": "OverrideSpecifier", "overrides": [], "src": "7617:8:2" }, "parameters": { "id": 1375, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1374, "mutability": "mutable", "name": "account", "nodeType": "VariableDeclaration", "scope": 1385, "src": "7580:15:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1373, "name": "address", "nodeType": "ElementaryTypeName", "src": "7580:7:2", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" } ], "src": "7579:17:2" }, "returnParameters": { "id": 1379, "nodeType": "ParameterList", "parameters": [ { "constant": false, 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"isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9331:79:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1479, "nodeType": "ExpressionStatement", "src": "9331:79:2" }, { "expression": { "arguments": [ { "id": 1481, "name": "sender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1448, "src": "9430:6:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "arguments": [], "expression": { "argumentTypes": [], "id": 1482, "name": "_msgSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1178, "src": "9438:10:2", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_address_$", "typeString": "function () view returns (address)" } }, "id": 1483, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9438:12:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 1486, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 1484, "name": "currentAllowance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1465, "src": "9452:16:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "-", "rightExpression": { "id": 1485, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1452, "src": "9471:6:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "9452:25:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1480, "name": "_approve", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1781, "src": "9421:8:2", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 1487, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9421:57:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1488, "nodeType": "ExpressionStatement", "src": "9421:57:2" }, { "expression": { "hexValue": "74727565", "id": 1489, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "9498:4:2", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "functionReturnParameters": 1457, "id": 1490, "nodeType": "Return", "src": "9491:11:2" } ] }, "documentation": { "id": 1446, "nodeType": "StructuredDocumentation", "src": "8614:468:2", "text": " @dev See {IERC20-transferFrom}.\n Emits an {Approval} event indicating the updated allowance. This is not\n required by the EIP. See the note at the beginning of {ERC20}.\n Requirements:\n - `sender` and `recipient` cannot be the zero address.\n - `sender` must have a balance of at least `amount`.\n - the caller must have allowance for ``sender``'s tokens of at least\n `amount`." }, "functionSelector": "23b872dd", "id": 1492, "implemented": true, "kind": "function", "modifiers": [], "name": "transferFrom", "nodeType": "FunctionDefinition", "overrides": { "id": 1454, "nodeType": "OverrideSpecifier", "overrides": [], "src": "9176:8:2" }, "parameters": { "id": 1453, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1448, "mutability": "mutable", "name": "sender", "nodeType": "VariableDeclaration", "scope": 1492, "src": "9110:14:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1447, "name": "address", "nodeType": "ElementaryTypeName", "src": "9110:7:2", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1450, "mutability": "mutable", "name": "recipient", "nodeType": "VariableDeclaration", "scope": 1492, "src": "9126:17:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1449, "name": "address", "nodeType": "ElementaryTypeName", "src": "9126:7:2", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1452, "mutability": "mutable", "name": "amount", "nodeType": "VariableDeclaration", "scope": 1492, "src": "9145:14:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1451, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "9145:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "9109:51:2" }, "returnParameters": { "id": 1457, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1456, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 1492, "src": "9194:4:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 1455, "name": "bool", "nodeType": "ElementaryTypeName", "src": "9194:4:2", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "visibility": "internal" } ], "src": "9193:6:2" }, "scope": 1793, "src": "9088:422:2", "stateMutability": "nonpayable", "virtual": true, "visibility": "public" }, { "body": { "id": 1518, "nodeType": "Block", "src": "10013:121:2", "statements": [ { "expression": { "arguments": [ { "arguments": [], "expression": { "argumentTypes": [], "id": 1503, "name": "_msgSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1178, "src": "10033:10:2", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_address_$", "typeString": "function () view returns (address)" } }, "id": 1504, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10033:12:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1505, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1495, "src": "10047:7:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 1513, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "baseExpression": { "baseExpression": { "id": 1506, "name": "_allowances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1308, "src": "10056:11:2", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" } }, "id": 1509, "indexExpression": { "arguments": [], "expression": { "argumentTypes": [], "id": 1507, "name": "_msgSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1178, "src": "10068:10:2", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_address_$", "typeString": "function () view returns (address)" } }, "id": 1508, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10068:12:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "10056:25:2", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 1511, "indexExpression": { "id": 1510, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1495, "src": "10082:7:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "10056:34:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "+", "rightExpression": { "id": 1512, "name": "addedValue", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1497, "src": "10093:10:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "10056:47:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1502, "name": "_approve", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1781, "src": "10024:8:2", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 1514, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10024:80:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1515, "nodeType": "ExpressionStatement", "src": "10024:80:2" }, { "expression": { "hexValue": "74727565", "id": 1516, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "10122:4:2", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "functionReturnParameters": 1501, "id": 1517, "nodeType": "Return", "src": "10115:11:2" } ] }, "documentation": { "id": 1493, "nodeType": "StructuredDocumentation", "src": "9518:395:2", "text": " @dev Atomically increases the allowance granted to `spender` by the caller.\n This is an alternative to {approve} that can be used as a mitigation for\n problems described in {IERC20-approve}.\n Emits an {Approval} event indicating the updated allowance.\n Requirements:\n - `spender` cannot be the zero address." }, "functionSelector": "39509351", "id": 1519, "implemented": true, "kind": "function", "modifiers": [], "name": "increaseAllowance", "nodeType": "FunctionDefinition", "parameters": { "id": 1498, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1495, "mutability": "mutable", "name": "spender", "nodeType": "VariableDeclaration", "scope": 1519, "src": "9946:15:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1494, "name": "address", "nodeType": "ElementaryTypeName", "src": "9946:7:2", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1497, "mutability": "mutable", "name": "addedValue", "nodeType": "VariableDeclaration", "scope": 1519, "src": "9963:18:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1496, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "9963:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "9945:37:2" }, "returnParameters": { "id": 1501, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1500, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 1519, "src": "10007:4:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 1499, "name": "bool", "nodeType": "ElementaryTypeName", "src": "10007:4:2", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "visibility": "internal" } ], "src": "10006:6:2" }, "scope": 1793, "src": "9919:215:2", "stateMutability": "nonpayable", "virtual": true, "visibility": "public" }, { "body": { "id": 1556, "nodeType": "Block", "src": "10736:278:2", "statements": [ { "assignments": [ 1530 ], "declarations": [ { "constant": false, "id": 1530, "mutability": "mutable", "name": "currentAllowance", "nodeType": "VariableDeclaration", "scope": 1556, "src": "10747:24:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1529, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "10747:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "id": 1537, "initialValue": { "baseExpression": { "baseExpression": { "id": 1531, "name": "_allowances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1308, "src": "10774:11:2", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" } }, "id": 1534, "indexExpression": { "arguments": [], "expression": { "argumentTypes": [], "id": 1532, "name": "_msgSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1178, "src": "10786:10:2", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_address_$", "typeString": "function () view returns (address)" } }, "id": 1533, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10786:12:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "10774:25:2", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 1536, "indexExpression": { "id": 1535, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1522, "src": "10800:7:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "10774:34:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "VariableDeclarationStatement", "src": "10747:61:2" }, { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 1541, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 1539, "name": "currentAllowance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1530, "src": "10827:16:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": ">=", "rightExpression": { "id": 1540, "name": "subtractedValue", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1524, "src": "10847:15:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "10827:35:2", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a2064656372656173656420616c6c6f77616e63652062656c6f77207a65726f", "id": 1542, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "10864:39:2", "typeDescriptions": { "typeIdentifier": "t_stringliteral_f8b476f7d28209d77d4a4ac1fe36b9f8259aa1bb6bddfa6e89de7e51615cf8a8", "typeString": "literal_string \"ERC20: decreased allowance below zero\"" }, "value": "ERC20: decreased allowance below zero" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_f8b476f7d28209d77d4a4ac1fe36b9f8259aa1bb6bddfa6e89de7e51615cf8a8", "typeString": "literal_string \"ERC20: decreased allowance below zero\"" } ], "id": 1538, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "10819:7:2", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 1543, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10819:85:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1544, "nodeType": "ExpressionStatement", "src": "10819:85:2" }, { "expression": { "arguments": [ { "arguments": [], "expression": { "argumentTypes": [], "id": 1546, "name": "_msgSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1178, "src": "10924:10:2", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_address_$", "typeString": "function () view returns (address)" } }, "id": 1547, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10924:12:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1548, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1522, "src": "10938:7:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 1551, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 1549, "name": "currentAllowance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1530, "src": "10947:16:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "-", "rightExpression": { "id": 1550, "name": "subtractedValue", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1524, "src": "10966:15:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "10947:34:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1545, "name": "_approve", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1781, "src": "10915:8:2", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 1552, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10915:67:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1553, "nodeType": "ExpressionStatement", "src": "10915:67:2" }, { "expression": { "hexValue": "74727565", "id": 1554, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "11002:4:2", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "functionReturnParameters": 1528, "id": 1555, "nodeType": "Return", "src": "10995:11:2" } ] }, "documentation": { "id": 1520, "nodeType": "StructuredDocumentation", "src": "10142:489:2", "text": " @dev Atomically decreases the allowance granted to `spender` by the caller.\n This is an alternative to {approve} that can be used as a mitigation for\n problems described in {IERC20-approve}.\n Emits an {Approval} event indicating the updated allowance.\n Requirements:\n - `spender` cannot be the zero address.\n - `spender` must have allowance for the caller of at least\n `subtractedValue`." }, "functionSelector": "a457c2d7", "id": 1557, "implemented": true, "kind": "function", "modifiers": [], "name": "decreaseAllowance", "nodeType": "FunctionDefinition", "parameters": { "id": 1525, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1522, "mutability": "mutable", "name": "spender", "nodeType": "VariableDeclaration", "scope": 1557, "src": "10664:15:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1521, "name": "address", "nodeType": "ElementaryTypeName", "src": "10664:7:2", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1524, "mutability": "mutable", "name": "subtractedValue", "nodeType": "VariableDeclaration", "scope": 1557, "src": "10681:23:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1523, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "10681:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "10663:42:2" }, "returnParameters": { "id": 1528, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1527, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 1557, "src": "10730:4:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 1526, "name": "bool", "nodeType": "ElementaryTypeName", "src": "10730:4:2", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "visibility": "internal" } ], "src": "10729:6:2" }, "scope": 1793, "src": "10637:377:2", "stateMutability": "nonpayable", "virtual": true, "visibility": "public" }, { "body": { "id": 1626, "nodeType": "Block", "src": "11591:517:2", "statements": [ { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 1573, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 1568, "name": "sender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1560, "src": "11610:6:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "arguments": [ { "hexValue": "30", "id": 1571, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "11628:1:2", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { 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"isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "11602:70:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1576, "nodeType": "ExpressionStatement", "src": "11602:70:2" }, { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 1583, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 1578, "name": "recipient", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1562, "src": "11691:9:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "arguments": [ { "hexValue": "30", "id": 1581, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "11712:1:2", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 1580, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "11704:7:2", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 1579, "name": "address", "nodeType": "ElementaryTypeName", "src": "11704:7:2", "typeDescriptions": {} } }, "id": 1582, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "11704:10:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "11691:23:2", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a207472616e7366657220746f20746865207a65726f2061646472657373", "id": 1584, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "11716:37:2", "typeDescriptions": { "typeIdentifier": "t_stringliteral_0557e210f7a69a685100a7e4e3d0a7024c546085cee28910fd17d0b081d9516f", "typeString": "literal_string \"ERC20: transfer to the zero address\"" }, "value": "ERC20: transfer to the zero address" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_0557e210f7a69a685100a7e4e3d0a7024c546085cee28910fd17d0b081d9516f", "typeString": "literal_string \"ERC20: transfer to the zero address\"" } ], "id": 1577, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "11683:7:2", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 1585, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "11683:71:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1586, "nodeType": "ExpressionStatement", "src": "11683:71:2" }, { "expression": { "arguments": [ { "id": 1588, "name": "sender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1560, "src": "11788:6:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1589, "name": "recipient", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1562, "src": "11796:9:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1590, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1564, "src": "11807:6:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1587, "name": "_beforeTokenTransfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1792, "src": "11767:20:2", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 1591, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "11767:47:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1592, "nodeType": "ExpressionStatement", "src": "11767:47:2" }, { "assignments": [ 1594 ], "declarations": [ { "constant": false, "id": 1594, "mutability": "mutable", "name": "senderBalance", "nodeType": "VariableDeclaration", "scope": 1626, "src": "11827:21:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1593, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "11827:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "id": 1598, "initialValue": { "baseExpression": { "id": 1595, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1302, "src": "11851:9:2", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 1597, "indexExpression": { "id": 1596, "name": "sender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1560, "src": "11861:6:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "11851:17:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "VariableDeclarationStatement", "src": "11827:41:2" }, { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 1602, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 1600, "name": "senderBalance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1594, "src": "11887:13:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": ">=", "rightExpression": { "id": 1601, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1564, "src": "11904:6:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "11887:23:2", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a207472616e7366657220616d6f756e7420657863656564732062616c616e6365", "id": 1603, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "11912:40:2", "typeDescriptions": { "typeIdentifier": "t_stringliteral_4107e8a8b9e94bf8ff83080ddec1c0bffe897ebc2241b89d44f66b3d274088b6", "typeString": "literal_string \"ERC20: transfer amount exceeds balance\"" }, "value": "ERC20: transfer amount exceeds balance" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_4107e8a8b9e94bf8ff83080ddec1c0bffe897ebc2241b89d44f66b3d274088b6", "typeString": "literal_string \"ERC20: transfer amount exceeds balance\"" } ], "id": 1599, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "11879:7:2", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 1604, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "11879:74:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1605, "nodeType": "ExpressionStatement", "src": "11879:74:2" }, { "expression": { "id": 1612, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "id": 1606, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1302, "src": "11964:9:2", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 1608, "indexExpression": { "id": 1607, "name": "sender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1560, "src": "11974:6:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "11964:17:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 1611, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 1609, "name": "senderBalance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1594, "src": "11984:13:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "-", "rightExpression": { "id": 1610, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1564, "src": "12000:6:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "11984:22:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "11964:42:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 1613, "nodeType": "ExpressionStatement", "src": "11964:42:2" }, { "expression": { "id": 1618, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "id": 1614, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1302, "src": "12017:9:2", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 1616, "indexExpression": { "id": 1615, "name": "recipient", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1562, "src": "12027:9:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "12017:20:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "+=", "rightHandSide": { "id": 1617, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1564, "src": "12041:6:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "12017:30:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 1619, "nodeType": "ExpressionStatement", "src": "12017:30:2" }, { "eventCall": { "arguments": [ { "id": 1621, "name": "sender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1560, "src": "12074:6:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1622, "name": "recipient", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1562, "src": "12082:9:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1623, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1564, "src": "12093:6:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1620, "name": "Transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1257, "src": "12065:8:2", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 1624, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "12065:35:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1625, "nodeType": "EmitStatement", "src": "12060:40:2" } ] }, "documentation": { "id": 1558, "nodeType": "StructuredDocumentation", "src": "11022:476:2", "text": " @dev Moves tokens `amount` from `sender` to `recipient`.\n This is internal function is equivalent to {transfer}, and can be used to\n e.g. implement automatic token fees, slashing mechanisms, etc.\n Emits a {Transfer} event.\n Requirements:\n - `sender` cannot be the zero address.\n - `recipient` cannot be the zero address.\n - `sender` must have a balance of at least `amount`." }, "id": 1627, "implemented": true, "kind": "function", "modifiers": [], "name": "_transfer", "nodeType": "FunctionDefinition", "parameters": { "id": 1565, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1560, "mutability": "mutable", "name": "sender", "nodeType": "VariableDeclaration", "scope": 1627, "src": "11523:14:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1559, "name": "address", "nodeType": "ElementaryTypeName", "src": "11523:7:2", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1562, "mutability": "mutable", "name": "recipient", "nodeType": "VariableDeclaration", "scope": 1627, "src": "11539:17:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1561, "name": "address", "nodeType": "ElementaryTypeName", "src": "11539:7:2", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1564, "mutability": "mutable", "name": "amount", "nodeType": "VariableDeclaration", "scope": 1627, "src": "11558:14:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1563, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "11558:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "11522:51:2" }, "returnParameters": { "id": 1566, "nodeType": "ParameterList", "parameters": [], "src": "11591:0:2" }, "scope": 1793, "src": "11504:604:2", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 1673, "nodeType": "Block", "src": "12455:273:2", "statements": [ { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 1641, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 1636, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1630, "src": "12474:7:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "arguments": [ { "hexValue": "30", "id": 1639, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "12493:1:2", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 1638, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "12485:7:2", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 1637, "name": "address", "nodeType": "ElementaryTypeName", "src": "12485:7:2", "typeDescriptions": {} } }, "id": 1640, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "12485:10:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "12474:21:2", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a206d696e7420746f20746865207a65726f2061646472657373", "id": 1642, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "12497:33:2", "typeDescriptions": { "typeIdentifier": "t_stringliteral_fc0b381caf0a47702017f3c4b358ebe3d3aff6c60ce819a8bf3ef5a95d4f202e", "typeString": "literal_string \"ERC20: mint to the zero address\"" }, "value": "ERC20: mint to the zero address" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_fc0b381caf0a47702017f3c4b358ebe3d3aff6c60ce819a8bf3ef5a95d4f202e", "typeString": "literal_string \"ERC20: mint to the zero address\"" } ], "id": 1635, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "12466:7:2", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 1643, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "12466:65:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1644, "nodeType": "ExpressionStatement", "src": "12466:65:2" }, { "expression": { "arguments": [ { "arguments": [ { "hexValue": "30", "id": 1648, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "12573:1:2", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 1647, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "12565:7:2", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 1646, "name": "address", "nodeType": "ElementaryTypeName", "src": "12565:7:2", "typeDescriptions": {} } }, "id": 1649, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "12565:10:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1650, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1630, "src": "12577:7:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1651, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1632, "src": "12586:6:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1645, "name": "_beforeTokenTransfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1792, "src": "12544:20:2", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 1652, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "12544:49:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1653, "nodeType": "ExpressionStatement", "src": "12544:49:2" }, { "expression": { "id": 1656, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "id": 1654, "name": "_totalSupply", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1310, "src": "12606:12:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "+=", "rightHandSide": { "id": 1655, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1632, "src": "12622:6:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "12606:22:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 1657, "nodeType": "ExpressionStatement", "src": "12606:22:2" }, { "expression": { "id": 1662, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "id": 1658, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1302, "src": "12639:9:2", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 1660, "indexExpression": { "id": 1659, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1630, "src": "12649:7:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "12639:18:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "+=", "rightHandSide": { "id": 1661, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1632, "src": "12661:6:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "12639:28:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 1663, "nodeType": "ExpressionStatement", "src": "12639:28:2" }, { "eventCall": { "arguments": [ { "arguments": [ { "hexValue": "30", "id": 1667, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "12700:1:2", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 1666, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "12692:7:2", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 1665, "name": "address", "nodeType": "ElementaryTypeName", "src": "12692:7:2", "typeDescriptions": {} } }, "id": 1668, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "12692:10:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1669, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1630, "src": "12704:7:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1670, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1632, "src": "12713:6:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1664, "name": "Transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1257, "src": "12683:8:2", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 1671, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "12683:37:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1672, "nodeType": "EmitStatement", "src": "12678:42:2" } ] }, "documentation": { "id": 1628, "nodeType": "StructuredDocumentation", "src": "12116:268:2", "text": "@dev Creates `amount` tokens and assigns them to `account`, increasing\n the total supply.\n Emits a {Transfer} event with `from` set to the zero address.\n Requirements:\n - `to` cannot be the zero address." }, "id": 1674, "implemented": true, "kind": "function", "modifiers": [], "name": "_mint", "nodeType": "FunctionDefinition", "parameters": { "id": 1633, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1630, "mutability": "mutable", "name": "account", "nodeType": "VariableDeclaration", "scope": 1674, "src": "12405:15:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1629, "name": "address", "nodeType": "ElementaryTypeName", "src": "12405:7:2", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1632, "mutability": "mutable", "name": "amount", "nodeType": "VariableDeclaration", "scope": 1674, "src": "12422:14:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1631, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "12422:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "12404:33:2" }, "returnParameters": { "id": 1634, "nodeType": "ParameterList", "parameters": [], "src": "12455:0:2" }, "scope": 1793, "src": "12390:338:2", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 1735, "nodeType": "Block", "src": "13126:429:2", "statements": [ { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 1688, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 1683, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1677, "src": "13145:7:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "arguments": [ { "hexValue": "30", "id": 1686, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "13164:1:2", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 1685, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "13156:7:2", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 1684, "name": "address", "nodeType": "ElementaryTypeName", "src": "13156:7:2", "typeDescriptions": {} } }, "id": 1687, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "13156:10:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "13145:21:2", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a206275726e2066726f6d20746865207a65726f2061646472657373", "id": 1689, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "13168:35:2", "typeDescriptions": { "typeIdentifier": "t_stringliteral_b16788493b576042bb52c50ed56189e0b250db113c7bfb1c3897d25cf9632d7f", "typeString": "literal_string \"ERC20: burn from the zero address\"" }, "value": "ERC20: burn from the zero address" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_b16788493b576042bb52c50ed56189e0b250db113c7bfb1c3897d25cf9632d7f", "typeString": "literal_string \"ERC20: burn from the zero address\"" } ], "id": 1682, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "13137:7:2", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 1690, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "13137:67:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1691, "nodeType": "ExpressionStatement", "src": "13137:67:2" }, { "expression": { "arguments": [ { "id": 1693, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1677, "src": "13238:7:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "arguments": [ { "hexValue": "30", "id": 1696, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "13255:1:2", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 1695, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "13247:7:2", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 1694, "name": "address", "nodeType": "ElementaryTypeName", "src": "13247:7:2", "typeDescriptions": {} } }, "id": 1697, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "13247:10:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1698, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1679, "src": "13259:6:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1692, "name": "_beforeTokenTransfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1792, "src": "13217:20:2", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 1699, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "13217:49:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1700, "nodeType": "ExpressionStatement", "src": "13217:49:2" }, { "assignments": [ 1702 ], "declarations": [ { "constant": false, "id": 1702, "mutability": "mutable", "name": "accountBalance", "nodeType": "VariableDeclaration", "scope": 1735, "src": "13279:22:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1701, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "13279:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "id": 1706, "initialValue": { "baseExpression": { "id": 1703, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1302, "src": "13304:9:2", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 1705, "indexExpression": { "id": 1704, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1677, "src": "13314:7:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "13304:18:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "VariableDeclarationStatement", "src": "13279:43:2" }, { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 1710, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 1708, "name": "accountBalance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1702, "src": "13341:14:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": ">=", "rightExpression": { "id": 1709, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1679, "src": "13359:6:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "13341:24:2", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a206275726e20616d6f756e7420657863656564732062616c616e6365", "id": 1711, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "13367:36:2", "typeDescriptions": { "typeIdentifier": "t_stringliteral_149b126e7125232b4200af45303d04fba8b74653b1a295a6a561a528c33fefdd", "typeString": "literal_string \"ERC20: burn amount exceeds balance\"" }, "value": "ERC20: burn amount exceeds balance" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_149b126e7125232b4200af45303d04fba8b74653b1a295a6a561a528c33fefdd", "typeString": "literal_string \"ERC20: burn amount exceeds balance\"" } ], "id": 1707, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "13333:7:2", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 1712, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "13333:71:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1713, "nodeType": "ExpressionStatement", "src": "13333:71:2" }, { "expression": { "id": 1720, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "id": 1714, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1302, "src": "13415:9:2", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 1716, "indexExpression": { "id": 1715, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1677, "src": "13425:7:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "13415:18:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 1719, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 1717, "name": "accountBalance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1702, "src": "13436:14:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "-", "rightExpression": { "id": 1718, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1679, "src": "13453:6:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "13436:23:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "13415:44:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 1721, "nodeType": "ExpressionStatement", "src": "13415:44:2" }, { "expression": { "id": 1724, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "id": 1722, "name": "_totalSupply", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1310, "src": "13470:12:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "-=", "rightHandSide": { "id": 1723, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1679, "src": "13486:6:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "13470:22:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 1725, "nodeType": "ExpressionStatement", "src": "13470:22:2" }, { "eventCall": { "arguments": [ { "id": 1727, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1677, "src": "13519:7:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "arguments": [ { "hexValue": "30", "id": 1730, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "13536:1:2", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 1729, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "13528:7:2", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 1728, "name": "address", "nodeType": "ElementaryTypeName", "src": "13528:7:2", "typeDescriptions": {} } }, "id": 1731, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "13528:10:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1732, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1679, "src": "13540:6:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1726, "name": "Transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1257, "src": "13510:8:2", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 1733, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "13510:37:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1734, "nodeType": "EmitStatement", "src": "13505:42:2" } ] }, "documentation": { "id": 1675, "nodeType": "StructuredDocumentation", "src": "12736:319:2", "text": " @dev Destroys `amount` tokens from `account`, reducing the\n total supply.\n Emits a {Transfer} event with `to` set to the zero address.\n Requirements:\n - `account` cannot be the zero address.\n - `account` must have at least `amount` tokens." }, "id": 1736, "implemented": true, "kind": "function", "modifiers": [], "name": "_burn", "nodeType": "FunctionDefinition", "parameters": { "id": 1680, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1677, "mutability": "mutable", "name": "account", "nodeType": "VariableDeclaration", "scope": 1736, "src": "13076:15:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1676, "name": "address", "nodeType": "ElementaryTypeName", "src": "13076:7:2", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1679, "mutability": "mutable", "name": "amount", "nodeType": "VariableDeclaration", "scope": 1736, "src": "13093:14:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1678, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "13093:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "13075:33:2" }, "returnParameters": { "id": 1681, "nodeType": "ParameterList", "parameters": [], "src": "13126:0:2" }, "scope": 1793, "src": "13061:494:2", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 1780, "nodeType": "Block", "src": "14076:263:2", "statements": [ { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 1752, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 1747, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1739, "src": "14095:5:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "arguments": [ { "hexValue": "30", "id": 1750, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "14112:1:2", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 1749, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "14104:7:2", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 1748, "name": "address", "nodeType": "ElementaryTypeName", "src": "14104:7:2", "typeDescriptions": {} } }, "id": 1751, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "14104:10:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "14095:19:2", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a20617070726f76652066726f6d20746865207a65726f2061646472657373", "id": 1753, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "14116:38:2", "typeDescriptions": { "typeIdentifier": "t_stringliteral_c953f4879035ed60e766b34720f656aab5c697b141d924c283124ecedb91c208", "typeString": "literal_string \"ERC20: approve from the zero address\"" }, "value": "ERC20: approve from the zero address" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_c953f4879035ed60e766b34720f656aab5c697b141d924c283124ecedb91c208", "typeString": "literal_string \"ERC20: approve from the zero address\"" } ], "id": 1746, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "14087:7:2", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 1754, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "14087:68:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1755, "nodeType": "ExpressionStatement", "src": "14087:68:2" }, { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 1762, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 1757, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1741, "src": "14174:7:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "arguments": [ { "hexValue": "30", "id": 1760, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "14193:1:2", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 1759, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "14185:7:2", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 1758, "name": "address", "nodeType": "ElementaryTypeName", "src": "14185:7:2", "typeDescriptions": {} } }, "id": 1761, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "14185:10:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "14174:21:2", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a20617070726f766520746f20746865207a65726f2061646472657373", "id": 1763, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "14197:36:2", "typeDescriptions": { "typeIdentifier": "t_stringliteral_24883cc5fe64ace9d0df1893501ecb93c77180f0ff69cca79affb3c316dc8029", "typeString": "literal_string \"ERC20: approve to the zero address\"" }, "value": "ERC20: approve to the zero address" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_24883cc5fe64ace9d0df1893501ecb93c77180f0ff69cca79affb3c316dc8029", "typeString": "literal_string \"ERC20: approve to the zero address\"" } ], "id": 1756, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "14166:7:2", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 1764, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "14166:68:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1765, "nodeType": "ExpressionStatement", "src": "14166:68:2" }, { "expression": { "id": 1772, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "baseExpression": { "id": 1766, "name": "_allowances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1308, "src": "14247:11:2", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" } }, "id": 1769, "indexExpression": { "id": 1767, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1739, "src": "14259:5:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "14247:18:2", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 1770, "indexExpression": { "id": 1768, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1741, "src": "14266:7:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "14247:27:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "id": 1771, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1743, "src": "14277:6:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "14247:36:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 1773, "nodeType": "ExpressionStatement", "src": "14247:36:2" }, { "eventCall": { "arguments": [ { "id": 1775, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1739, "src": "14308:5:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1776, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1741, "src": "14315:7:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1777, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1743, "src": "14324:6:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1774, "name": "Approval", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1266, "src": "14299:8:2", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 1778, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "14299:32:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1779, "nodeType": "EmitStatement", "src": "14294:37:2" } ] }, "documentation": { "id": 1737, "nodeType": "StructuredDocumentation", "src": "13563:424:2", "text": " @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.\n This internal function is equivalent to `approve`, and can be used to\n e.g. set automatic allowances for certain subsystems, etc.\n Emits an {Approval} event.\n Requirements:\n - `owner` cannot be the zero address.\n - `spender` cannot be the zero address." }, "id": 1781, "implemented": true, "kind": "function", "modifiers": [], "name": "_approve", "nodeType": "FunctionDefinition", "parameters": { "id": 1744, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1739, "mutability": "mutable", "name": "owner", "nodeType": "VariableDeclaration", "scope": 1781, "src": "14011:13:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1738, "name": "address", "nodeType": "ElementaryTypeName", "src": "14011:7:2", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1741, "mutability": "mutable", "name": "spender", "nodeType": "VariableDeclaration", "scope": 1781, "src": "14026:15:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1740, "name": "address", "nodeType": "ElementaryTypeName", "src": "14026:7:2", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1743, "mutability": "mutable", "name": "amount", "nodeType": "VariableDeclaration", "scope": 1781, "src": "14043:14:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1742, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "14043:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "14010:48:2" }, "returnParameters": { "id": 1745, "nodeType": "ParameterList", "parameters": [], "src": "14076:0:2" }, "scope": 1793, "src": "13993:346:2", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 1791, "nodeType": "Block", "src": "15031:3:2", "statements": [] }, "documentation": { "id": 1782, "nodeType": "StructuredDocumentation", "src": "14347:589:2", "text": " @dev Hook that is called before any transfer of tokens. This includes\n minting and burning.\n Calling conditions:\n - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens\n will be to transferred to `to`.\n - when `from` is zero, `amount` tokens will be minted for `to`.\n - when `to` is zero, `amount` of ``from``'s tokens will be burned.\n - `from` and `to` are never both zero.\n To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]." }, "id": 1792, "implemented": true, "kind": "function", "modifiers": [], "name": "_beforeTokenTransfer", "nodeType": "FunctionDefinition", "parameters": { "id": 1789, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1784, "mutability": "mutable", "name": "from", "nodeType": "VariableDeclaration", "scope": 1792, "src": "14972:12:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1783, "name": "address", "nodeType": "ElementaryTypeName", "src": "14972:7:2", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1786, "mutability": "mutable", "name": "to", "nodeType": "VariableDeclaration", "scope": 1792, "src": "14986:10:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1785, "name": "address", "nodeType": "ElementaryTypeName", "src": "14986:7:2", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1788, "mutability": "mutable", "name": "amount", "nodeType": "VariableDeclaration", "scope": 1792, "src": "14998:14:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1787, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "14998:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "14971:42:2" }, "returnParameters": { "id": 1790, "nodeType": "ParameterList", "parameters": [], "src": "15031:0:2" }, "scope": 1793, "src": "14942:92:2", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" } ], "scope": 1900, "src": "5488:9549:2" }, { "id": 1794, "literals": [ "solidity", "^", "0.8", ".0" ], "nodeType": "PragmaDirective", "src": "15043:23:2" }, { "abstract": true, "baseContracts": [ { "baseName": { "id": 1796, "name": "Context", "nodeType": "IdentifierPath", "referencedDeclaration": 1190, "src": "15321:7:2" }, "id": 1797, "nodeType": "InheritanceSpecifier", "src": "15321:7:2" }, { "baseName": { "id": 1798, "name": "ERC20", "nodeType": "IdentifierPath", "referencedDeclaration": 1793, "src": "15330:5:2" }, "id": 1799, "nodeType": "InheritanceSpecifier", "src": "15330:5:2" } ], "contractDependencies": [ 1190, 1267, 1290, 1793 ], "contractKind": "contract", "documentation": { "id": 1795, "nodeType": "StructuredDocumentation", "src": "15072:212:2", "text": " @dev Extension of {ERC20} that allows token holders to destroy both their own\n tokens and those that they have an allowance for, in a way that can be\n recognized off-chain (via event analysis)." }, "fullyImplemented": false, "id": 1851, "linearizedBaseContracts": [ 1851, 1793, 1290, 1267, 1190 ], "name": "ERC20Burnable", "nodeType": "ContractDefinition", "nodes": [ { "body": { "id": 1811, "nodeType": "Block", "src": "15496:46:2", "statements": [ { "expression": { "arguments": [ { "arguments": [], "expression": { "argumentTypes": [], "id": 1806, "name": "_msgSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1178, "src": "15513:10:2", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_address_$", "typeString": "function () view returns (address)" } }, "id": 1807, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "15513:12:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1808, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1802, "src": "15527:6:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1805, "name": "_burn", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1736, "src": "15507:5:2", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,uint256)" } }, "id": 1809, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "15507:27:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1810, "nodeType": "ExpressionStatement", "src": "15507:27:2" } ] }, "documentation": { "id": 1800, "nodeType": "StructuredDocumentation", "src": "15343:102:2", "text": " @dev Destroys `amount` tokens from the caller.\n See {ERC20-_burn}." }, "functionSelector": "42966c68", "id": 1812, "implemented": true, "kind": "function", "modifiers": [], "name": "burn", "nodeType": "FunctionDefinition", "parameters": { "id": 1803, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1802, "mutability": "mutable", "name": "amount", "nodeType": "VariableDeclaration", "scope": 1812, "src": "15465:14:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1801, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "15465:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "15464:16:2" }, "returnParameters": { "id": 1804, "nodeType": "ParameterList", "parameters": [], "src": "15496:0:2" }, "scope": 1851, "src": "15451:91:2", "stateMutability": "nonpayable", "virtual": true, "visibility": "public" }, { "body": { "id": 1849, "nodeType": "Block", "src": "15927:266:2", "statements": [ { "assignments": [ 1821 ], "declarations": [ { "constant": false, "id": 1821, "mutability": "mutable", "name": "currentAllowance", "nodeType": "VariableDeclaration", "scope": 1849, "src": "15938:24:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1820, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "15938:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "id": 1827, "initialValue": { "arguments": [ { "id": 1823, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1815, "src": "15975:7:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "arguments": [], "expression": { "argumentTypes": [], "id": 1824, "name": "_msgSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1178, "src": "15984:10:2", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_address_$", "typeString": "function () view returns (address)" } }, "id": 1825, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": 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{ "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 1831, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 1829, "name": "currentAllowance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1821, "src": "16016:16:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": ">=", "rightExpression": { "id": 1830, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1817, "src": "16036:6:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "16016:26:2", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a206275726e20616d6f756e74206578636565647320616c6c6f77616e6365", "id": 1832, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "16044:38:2", "typeDescriptions": { "typeIdentifier": "t_stringliteral_a287c363786607a1457a2d9d12fa61c0073358e02d76b4035fc2c2d86a19c0db", "typeString": "literal_string \"ERC20: burn amount exceeds allowance\"" }, "value": "ERC20: burn amount exceeds allowance" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_a287c363786607a1457a2d9d12fa61c0073358e02d76b4035fc2c2d86a19c0db", "typeString": "literal_string \"ERC20: burn amount exceeds allowance\"" } ], "id": 1828, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "16008:7:2", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 1833, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "16008:75:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1834, "nodeType": "ExpressionStatement", "src": "16008:75:2" }, { "expression": { "arguments": [ { "id": 1836, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1815, "src": "16103:7:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "arguments": [], "expression": { "argumentTypes": [], "id": 1837, "name": "_msgSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1178, "src": "16112:10:2", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_address_$", "typeString": "function () view returns (address)" } }, "id": 1838, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": 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"argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1835, "name": "_approve", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1781, "src": "16094:8:2", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 1842, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "16094:58:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1843, "nodeType": "ExpressionStatement", "src": "16094:58:2" }, { "expression": { "arguments": [ { "id": 1845, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1815, "src": "16169:7:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1846, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1817, "src": "16178:6:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1844, "name": "_burn", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1736, "src": "16163:5:2", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,uint256)" } }, "id": 1847, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "16163:22:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1848, "nodeType": "ExpressionStatement", "src": "16163:22:2" } ] }, "documentation": { "id": 1813, "nodeType": "StructuredDocumentation", "src": "15550:305:2", "text": " @dev Destroys `amount` tokens from `account`, deducting from the caller's\n allowance.\n See {ERC20-_burn} and {ERC20-allowance}.\n Requirements:\n - the caller must have allowance for ``accounts``'s tokens of at least\n `amount`." }, "functionSelector": "79cc6790", "id": 1850, "implemented": true, "kind": "function", "modifiers": [], "name": "burnFrom", "nodeType": "FunctionDefinition", "parameters": { "id": 1818, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1815, "mutability": "mutable", "name": "account", "nodeType": "VariableDeclaration", "scope": 1850, "src": "15879:15:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1814, "name": "address", "nodeType": "ElementaryTypeName", "src": "15879:7:2", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1817, "mutability": "mutable", "name": "amount", "nodeType": "VariableDeclaration", "scope": 1850, "src": "15896:14:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1816, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "15896:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "15878:33:2" }, "returnParameters": { "id": 1819, "nodeType": "ParameterList", "parameters": [], "src": "15927:0:2" }, "scope": 1851, "src": "15861:332:2", "stateMutability": "nonpayable", "virtual": true, "visibility": "public" } ], "scope": 1900, "src": "15286:910:2" }, { "id": 1852, "literals": [ "solidity", "^", "0.8", ".0" ], "nodeType": "PragmaDirective", "src": "16200:23:2" }, { "abstract": false, "baseContracts": [ { "baseName": { "id": 1854, "name": "ERC20Burnable", "nodeType": "IdentifierPath", "referencedDeclaration": 1851, "src": "16631:13:2" }, "id": 1855, "nodeType": "InheritanceSpecifier", "src": "16631:13:2" } ], "contractDependencies": [ 1190, 1267, 1290, 1793, 1851 ], "contractKind": "contract", "documentation": { "id": 1853, "nodeType": "StructuredDocumentation", "src": "16227:367:2", "text": " @dev {ERC20} token, including:\n - Preminted initial supply\n - Ability for holders to burn (destroy) their tokens\n - No access control mechanism (for minting/pausing) and hence no governance\n This contract uses {ERC20Burnable} to include burn capabilities - head to\n its documentation for details.\n _Available since v3.4._" }, "fullyImplemented": true, "id": 1878, "linearizedBaseContracts": [ 1878, 1851, 1793, 1290, 1267, 1190 ], "name": "ERC20PresetFixedSupply", "nodeType": "ContractDefinition", "nodes": [ { "body": { "id": 1876, "nodeType": "Block", "src": "16948:46:2", "statements": [ { "expression": { "arguments": [ { "id": 1872, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1864, "src": "16965:5:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1873, "name": "initialSupply", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1862, "src": "16972:13:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1871, "name": "_mint", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1674, "src": "16959:5:2", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,uint256)" } }, "id": 1874, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "16959:27:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1875, "nodeType": "ExpressionStatement", "src": "16959:27:2" } ] }, "documentation": { "id": 1856, "nodeType": "StructuredDocumentation", "src": "16652:135:2", "text": " @dev Mints `initialSupply` amount of token and transfers them to `owner`.\n See {ERC20-constructor}." }, "id": 1877, "implemented": true, "kind": "constructor", "modifiers": [ { "arguments": [ { "id": 1867, "name": "name", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1858, "src": "16934:4:2", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string memory" } }, { "id": 1868, "name": "symbol", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1860, "src": "16940:6:2", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string memory" } } ], "id": 1869, "modifierName": { "id": 1866, "name": "ERC20", "nodeType": "IdentifierPath", "referencedDeclaration": 1793, "src": "16928:5:2" }, "nodeType": "ModifierInvocation", "src": "16928:19:2" } ], "name": "", "nodeType": "FunctionDefinition", "parameters": { "id": 1865, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1858, "mutability": "mutable", "name": "name", "nodeType": "VariableDeclaration", "scope": 1877, "src": "16815:18:2", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string" }, "typeName": { "id": 1857, "name": "string", "nodeType": "ElementaryTypeName", "src": "16815:6:2", "typeDescriptions": { "typeIdentifier": 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}, { "abstract": false, "baseContracts": [ { "baseName": { "id": 1880, "name": "ERC20PresetFixedSupply", "nodeType": "IdentifierPath", "referencedDeclaration": 1878, "src": "17051:22:2" }, "id": 1881, "nodeType": "InheritanceSpecifier", "src": "17051:22:2" } ], "contractDependencies": [ 1190, 1267, 1290, 1793, 1851, 1878 ], "contractKind": "contract", "fullyImplemented": true, "id": 1899, "linearizedBaseContracts": [ 1899, 1878, 1851, 1793, 1290, 1267, 1190 ], "name": "CustomERC20", "nodeType": "ContractDefinition", "nodes": [ { "body": { "id": 1897, "nodeType": "Block", "src": "17247:9:2", "statements": [] }, "id": 1898, "implemented": true, "kind": "constructor", "modifiers": [ { "arguments": [ { "id": 1890, "name": "_name", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1883, "src": "17188:5:2", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string memory" } }, { "id": 1891, "name": "_symbol", "nodeType": "Identifier", 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"referencedDeclaration": 1878, "src": "17165:22:2" }, "nodeType": "ModifierInvocation", "src": "17165:58:2" } ], "name": "", "nodeType": "FunctionDefinition", "parameters": { "id": 1888, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1883, "mutability": "mutable", "name": "_name", "nodeType": "VariableDeclaration", "scope": 1898, "src": "17094:19:2", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string" }, "typeName": { "id": 1882, "name": "string", "nodeType": "ElementaryTypeName", "src": "17094:6:2", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "visibility": "internal" }, { "constant": false, "id": 1885, "mutability": "mutable", "name": "_symbol", "nodeType": "VariableDeclaration", "scope": 1898, "src": "17115:21:2", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string" }, "typeName": { "id": 1884, "name": "string", "nodeType": "ElementaryTypeName", "src": "17115:6:2", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "visibility": "internal" }, { "constant": false, "id": 1887, "mutability": "mutable", "name": "_supply", "nodeType": "VariableDeclaration", "scope": 1898, "src": "17138:15:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1886, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "17138:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "17093:61:2" }, "returnParameters": { "id": 1896, "nodeType": "ParameterList", "parameters": [], "src": "17247:0:2" }, "scope": 1899, "src": "17082:174:2", "stateMutability": "nonpayable", "virtual": false, "visibility": "public" } ], "scope": 1900, "src": "17027:232:2" } ], "src": "35:17224:2" }, "legacyAST": { "absolutePath": "/F/Assignment/aibcccc/AIBC/contracts/CustomERC20.sol", "exportedSymbols": { "Context": [ 1190 ], "CustomERC20": [ 1899 ], "ERC20": [ 1793 ], "ERC20Burnable": [ 1851 ], "ERC20PresetFixedSupply": [ 1878 ], "IERC20": [ 1267 ], "IERC20Metadata": [ 1290 ] }, "id": 1900, "license": "MIT", "nodeType": "SourceUnit", "nodes": [ { "id": 1169, "literals": [ "solidity", "^", "0.8", ".0" ], "nodeType": "PragmaDirective", "src": "35:23:2" }, { "abstract": true, "baseContracts": [], "contractDependencies": [], "contractKind": "contract", "fullyImplemented": true, "id": 1190, "linearizedBaseContracts": [ 1190 ], "name": "Context", "nodeType": "ContractDefinition", "nodes": [ { "body": { "id": 1177, "nodeType": "Block", "src": "663:36:2", "statements": [ { "expression": { "expression": { "id": 1174, "name": "msg", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4294967281, "src": "681:3:2", "typeDescriptions": { "typeIdentifier": "t_magic_message", "typeString": "msg" } }, "id": 1175, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sender", "nodeType": "MemberAccess", "src": "681:10:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "functionReturnParameters": 1173, "id": 1176, "nodeType": "Return", "src": "674:17:2" } ] }, "id": 1178, "implemented": true, "kind": "function", "modifiers": [], "name": "_msgSender", "nodeType": "FunctionDefinition", "parameters": { "id": 1170, "nodeType": "ParameterList", "parameters": [], "src": "620:2:2" }, "returnParameters": { "id": 1173, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1172, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 1178, "src": "654:7:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1171, "name": "address", "nodeType": "ElementaryTypeName", "src": "654:7:2", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" } ], "src": "653:9:2" }, "scope": 1190, "src": "601:98:2", "stateMutability": "view", "virtual": true, "visibility": "internal" }, { "body": { "id": 1188, "nodeType": "Block", "src": "774:168:2", "statements": [ { "expression": { "id": 1183, "name": "this", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4294967268, "src": "785:4:2", "typeDescriptions": { "typeIdentifier": "t_contract$_Context_$1190", "typeString": "contract Context" } }, "id": 1184, "nodeType": "ExpressionStatement", "src": "785:4:2" }, { "expression": { "expression": { "id": 1185, "name": "msg", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4294967281, "src": "926:3:2", "typeDescriptions": { "typeIdentifier": "t_magic_message", "typeString": "msg" } }, "id": 1186, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "data", "nodeType": "MemberAccess", "src": "926:8:2", "typeDescriptions": { "typeIdentifier": "t_bytes_calldata_ptr", "typeString": "bytes calldata" } }, "functionReturnParameters": 1182, "id": 1187, "nodeType": "Return", "src": "919:15:2" } ] }, "id": 1189, "implemented": true, "kind": "function", "modifiers": [], "name": "_msgData", "nodeType": "FunctionDefinition", "parameters": { "id": 1179, "nodeType": "ParameterList", "parameters": [], "src": "724:2:2" }, "returnParameters": { "id": 1182, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1181, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 1189, "src": "758:14:2", "stateVariable": false, "storageLocation": "calldata", "typeDescriptions": { "typeIdentifier": "t_bytes_calldata_ptr", "typeString": "bytes" }, "typeName": { "id": 1180, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "758:5:2", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "visibility": "internal" } ], "src": "757:16:2" }, "scope": 1190, "src": "707:235:2", "stateMutability": "view", "virtual": true, "visibility": "internal" } ], "scope": 1900, "src": "568:377:2" }, { "id": 1191, "literals": [ "solidity", "^", "0.8", ".0" ], "nodeType": "PragmaDirective", "src": "949:23:2" }, { "abstract": false, "baseContracts": [], "contractDependencies": [], "contractKind": "interface", "documentation": { "id": 1192, "nodeType": "StructuredDocumentation", "src": "976:72:2", "text": " @dev Interface of the ERC20 standard as defined in the EIP." }, "fullyImplemented": false, "id": 1267, "linearizedBaseContracts": [ 1267 ], "name": "IERC20", "nodeType": "ContractDefinition", "nodes": [ { "documentation": { "id": 1193, "nodeType": "StructuredDocumentation", "src": "1074:68:2", "text": " @dev Returns the amount of tokens in existence." }, "functionSelector": "18160ddd", "id": 1198, "implemented": false, "kind": "function", "modifiers": [], "name": "totalSupply", "nodeType": "FunctionDefinition", "parameters": { "id": 1194, "nodeType": "ParameterList", "parameters": [], "src": "1168:2:2" }, "returnParameters": { "id": 1197, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1196, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 1198, "src": "1194:7:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1195, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1194:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "1193:9:2" }, "scope": 1267, "src": "1148:55:2", "stateMutability": "view", "virtual": false, "visibility": "external" }, { "documentation": { "id": 1199, "nodeType": "StructuredDocumentation", "src": "1211:74:2", "text": " @dev Returns the amount of tokens owned by `account`." }, "functionSelector": "70a08231", "id": 1206, "implemented": false, "kind": "function", "modifiers": [], "name": "balanceOf", "nodeType": "FunctionDefinition", "parameters": { "id": 1202, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1201, "mutability": "mutable", "name": "account", "nodeType": "VariableDeclaration", "scope": 1206, "src": "1310:15:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1200, "name": "address", "nodeType": "ElementaryTypeName", "src": "1310:7:2", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" } ], "src": "1309:17:2" }, "returnParameters": { "id": 1205, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1204, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 1206, "src": "1350:7:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1203, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1350:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "1349:9:2" }, "scope": 1267, "src": "1291:68:2", "stateMutability": "view", "virtual": false, "visibility": "external" }, { "documentation": { "id": 1207, "nodeType": "StructuredDocumentation", "src": "1367:215:2", "text": " @dev Moves `amount` tokens from the caller's account to `recipient`.\n Returns a boolean value indicating whether the operation succeeded.\n Emits a {Transfer} event." }, "functionSelector": "a9059cbb", "id": 1216, "implemented": false, "kind": "function", "modifiers": [], "name": "transfer", "nodeType": "FunctionDefinition", "parameters": { "id": 1212, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1209, "mutability": "mutable", "name": "recipient", "nodeType": "VariableDeclaration", "scope": 1216, "src": "1606:17:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1208, "name": "address", "nodeType": "ElementaryTypeName", "src": "1606:7:2", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1211, "mutability": "mutable", "name": "amount", "nodeType": "VariableDeclaration", "scope": 1216, "src": "1625:14:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1210, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1625:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "1605:35:2" }, "returnParameters": { "id": 1215, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1214, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 1216, "src": "1659:4:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 1213, "name": "bool", "nodeType": "ElementaryTypeName", "src": "1659:4:2", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "visibility": "internal" } ], "src": "1658:6:2" }, "scope": 1267, "src": "1588:77:2", "stateMutability": "nonpayable", "virtual": false, "visibility": "external" }, { "documentation": { "id": 1217, "nodeType": "StructuredDocumentation", "src": "1673:270:2", "text": " @dev Returns the remaining number of tokens that `spender` will be\n allowed to spend on behalf of `owner` through {transferFrom}. This is\n zero by default.\n This value changes when {approve} or {transferFrom} are called." }, "functionSelector": "dd62ed3e", "id": 1226, "implemented": false, "kind": "function", "modifiers": [], "name": "allowance", "nodeType": "FunctionDefinition", "parameters": { "id": 1222, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1219, "mutability": "mutable", "name": "owner", "nodeType": "VariableDeclaration", "scope": 1226, "src": "1968:13:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1218, "name": "address", "nodeType": "ElementaryTypeName", "src": "1968:7:2", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1221, "mutability": "mutable", "name": "spender", "nodeType": "VariableDeclaration", "scope": 1226, "src": "1983:15:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1220, "name": "address", "nodeType": "ElementaryTypeName", "src": "1983:7:2", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" } ], "src": "1967:32:2" }, "returnParameters": { "id": 1225, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1224, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 1226, "src": "2023:7:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1223, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "2023:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "2022:9:2" }, "scope": 1267, "src": "1949:83:2", "stateMutability": "view", "virtual": false, "visibility": "external" }, { "documentation": { "id": 1227, "nodeType": "StructuredDocumentation", "src": "2040:655:2", "text": " @dev Sets `amount` as the allowance of `spender` over the caller's tokens.\n Returns a boolean value indicating whether the operation succeeded.\n IMPORTANT: Beware that changing an allowance with this method brings the risk\n that someone may use both the old and the new allowance by unfortunate\n transaction ordering. One possible solution to mitigate this race\n condition is to first reduce the spender's allowance to 0 and set the\n desired value afterwards:\n https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729\n Emits an {Approval} event." }, "functionSelector": "095ea7b3", "id": 1236, "implemented": false, "kind": "function", "modifiers": [], "name": "approve", "nodeType": "FunctionDefinition", "parameters": { "id": 1232, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1229, "mutability": "mutable", "name": "spender", "nodeType": "VariableDeclaration", "scope": 1236, "src": "2718:15:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1228, "name": "address", "nodeType": "ElementaryTypeName", "src": "2718:7:2", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1231, "mutability": "mutable", "name": "amount", "nodeType": "VariableDeclaration", "scope": 1236, "src": "2735:14:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1230, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "2735:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "2717:33:2" }, "returnParameters": { "id": 1235, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1234, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 1236, "src": "2769:4:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 1233, "name": "bool", "nodeType": "ElementaryTypeName", "src": "2769:4:2", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "visibility": "internal" } ], "src": "2768:6:2" }, "scope": 1267, "src": "2701:74:2", "stateMutability": "nonpayable", "virtual": false, "visibility": "external" }, { "documentation": { "id": 1237, "nodeType": "StructuredDocumentation", "src": "2783:304:2", "text": " @dev Moves `amount` tokens from `sender` to `recipient` using the\n allowance mechanism. `amount` is then deducted from the caller's\n allowance.\n Returns a boolean value indicating whether the operation succeeded.\n Emits a {Transfer} event." }, "functionSelector": "23b872dd", "id": 1248, "implemented": false, "kind": "function", "modifiers": [], "name": "transferFrom", "nodeType": "FunctionDefinition", "parameters": { "id": 1244, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1239, "mutability": "mutable", "name": "sender", "nodeType": "VariableDeclaration", "scope": 1248, "src": "3115:14:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1238, "name": "address", "nodeType": "ElementaryTypeName", "src": "3115:7:2", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1241, "mutability": "mutable", "name": "recipient", "nodeType": "VariableDeclaration", "scope": 1248, "src": "3131:17:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1240, "name": "address", "nodeType": "ElementaryTypeName", "src": "3131:7:2", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1243, "mutability": "mutable", "name": "amount", "nodeType": "VariableDeclaration", "scope": 1248, "src": "3150:14:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1242, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3150:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "3114:51:2" }, "returnParameters": { "id": 1247, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1246, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 1248, "src": "3184:4:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 1245, "name": "bool", "nodeType": "ElementaryTypeName", "src": "3184:4:2", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "visibility": "internal" } ], "src": "3183:6:2" }, "scope": 1267, "src": "3093:97:2", "stateMutability": "nonpayable", "virtual": false, "visibility": "external" }, { "anonymous": false, "documentation": { "id": 1249, "nodeType": "StructuredDocumentation", "src": "3198:163:2", "text": " @dev Emitted when `value` tokens are moved from one account (`from`) to\n another (`to`).\n Note that `value` may be zero." }, "id": 1257, "name": "Transfer", "nodeType": "EventDefinition", "parameters": { "id": 1256, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1251, "indexed": true, "mutability": "mutable", "name": "from", "nodeType": "VariableDeclaration", "scope": 1257, "src": "3382:20:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1250, "name": "address", "nodeType": "ElementaryTypeName", "src": "3382:7:2", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1253, "indexed": true, "mutability": "mutable", "name": "to", "nodeType": "VariableDeclaration", "scope": 1257, "src": "3404:18:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1252, "name": "address", "nodeType": "ElementaryTypeName", "src": "3404:7:2", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1255, "indexed": false, "mutability": "mutable", "name": "value", "nodeType": "VariableDeclaration", "scope": 1257, "src": "3424:13:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1254, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3424:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "3381:57:2" }, "src": "3367:72:2" }, { "anonymous": false, "documentation": { "id": 1258, "nodeType": "StructuredDocumentation", "src": "3447:151:2", "text": " @dev Emitted when the allowance of a `spender` for an `owner` is set by\n a call to {approve}. `value` is the new allowance." }, "id": 1266, "name": "Approval", "nodeType": "EventDefinition", "parameters": { "id": 1265, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1260, "indexed": true, "mutability": "mutable", "name": "owner", "nodeType": "VariableDeclaration", "scope": 1266, "src": "3619:21:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1259, "name": "address", "nodeType": "ElementaryTypeName", "src": "3619:7:2", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1262, "indexed": true, "mutability": "mutable", "name": "spender", "nodeType": "VariableDeclaration", "scope": 1266, "src": "3642:23:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1261, "name": "address", "nodeType": "ElementaryTypeName", "src": "3642:7:2", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1264, "indexed": false, "mutability": "mutable", "name": "value", "nodeType": "VariableDeclaration", "scope": 1266, "src": "3667:13:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1263, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3667:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "3618:63:2" }, "src": "3604:78:2" } ], "scope": 1900, "src": "1050:2635:2" }, { "id": 1268, "literals": [ "solidity", "^", "0.8", ".0" ], "nodeType": "PragmaDirective", "src": "3693:23:2" }, { "abstract": false, "baseContracts": [ { "baseName": { "id": 1270, "name": "IERC20", "nodeType": "IdentifierPath", "referencedDeclaration": 1267, "src": "3872:6:2" }, "id": 1271, "nodeType": "InheritanceSpecifier", "src": "3872:6:2" } ], "contractDependencies": [ 1267 ], "contractKind": "interface", "documentation": { "id": 1269, "nodeType": "StructuredDocumentation", "src": "3722:120:2", "text": " @dev Interface for the optional metadata functions from the ERC20 standard.\n _Available since v4.1._" }, "fullyImplemented": false, "id": 1290, "linearizedBaseContracts": [ 1290, 1267 ], "name": "IERC20Metadata", "nodeType": "ContractDefinition", "nodes": [ { "documentation": { "id": 1272, "nodeType": "StructuredDocumentation", "src": "3886:56:2", "text": " @dev Returns the name of the token." }, "functionSelector": "06fdde03", "id": 1277, "implemented": false, "kind": "function", "modifiers": [], "name": "name", "nodeType": "FunctionDefinition", "parameters": { "id": 1273, "nodeType": "ParameterList", "parameters": [], "src": "3961:2:2" }, "returnParameters": { "id": 1276, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1275, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 1277, "src": "3987:13:2", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string" }, "typeName": { "id": 1274, "name": "string", "nodeType": "ElementaryTypeName", "src": "3987:6:2", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "visibility": "internal" } ], "src": "3986:15:2" }, "scope": 1290, "src": "3948:54:2", "stateMutability": "view", "virtual": false, "visibility": "external" }, { "documentation": { "id": 1278, "nodeType": "StructuredDocumentation", "src": "4010:58:2", "text": " @dev Returns the symbol of the token." }, "functionSelector": "95d89b41", "id": 1283, "implemented": false, "kind": "function", "modifiers": [], "name": "symbol", "nodeType": "FunctionDefinition", "parameters": { "id": 1279, "nodeType": "ParameterList", "parameters": [], "src": "4089:2:2" }, "returnParameters": { "id": 1282, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1281, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 1283, "src": "4115:13:2", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string" }, "typeName": { "id": 1280, "name": "string", "nodeType": "ElementaryTypeName", "src": "4115:6:2", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "visibility": "internal" } ], "src": "4114:15:2" }, "scope": 1290, "src": "4074:56:2", "stateMutability": "view", "virtual": false, "visibility": "external" }, { "documentation": { "id": 1284, "nodeType": "StructuredDocumentation", "src": "4138:67:2", "text": " @dev Returns the decimals places of the token." }, "functionSelector": "313ce567", "id": 1289, "implemented": false, "kind": "function", "modifiers": [], "name": "decimals", "nodeType": "FunctionDefinition", "parameters": { "id": 1285, "nodeType": "ParameterList", "parameters": [], "src": "4228:2:2" }, "returnParameters": { "id": 1288, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1287, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 1289, "src": "4254:5:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" }, "typeName": { "id": 1286, "name": "uint8", "nodeType": "ElementaryTypeName", "src": "4254:5:2", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "visibility": "internal" } ], "src": "4253:7:2" }, "scope": 1290, "src": "4211:50:2", "stateMutability": "view", "virtual": false, "visibility": "external" } ], "scope": 1900, "src": "3844:420:2" }, { "id": 1291, "literals": [ "solidity", "^", "0.8", ".0" ], "nodeType": "PragmaDirective", "src": "4272:23:2" }, { "abstract": false, "baseContracts": [ { "baseName": { "id": 1293, "name": "Context", "nodeType": "IdentifierPath", "referencedDeclaration": 1190, "src": "5506:7:2" }, "id": 1294, "nodeType": "InheritanceSpecifier", "src": "5506:7:2" }, { "baseName": { "id": 1295, "name": "IERC20", "nodeType": "IdentifierPath", "referencedDeclaration": 1267, "src": "5515:6:2" }, "id": 1296, "nodeType": "InheritanceSpecifier", "src": "5515:6:2" }, { "baseName": { "id": 1297, "name": "IERC20Metadata", "nodeType": "IdentifierPath", "referencedDeclaration": 1290, "src": "5523:14:2" }, "id": 1298, "nodeType": "InheritanceSpecifier", "src": "5523:14:2" } ], "contractDependencies": [ 1190, 1267, 1290 ], "contractKind": "contract", "documentation": { "id": 1292, "nodeType": "StructuredDocumentation", "src": "4301:1185:2", "text": " @dev Implementation of the {IERC20} interface.\n This implementation is agnostic to the way tokens are created. This means\n that a supply mechanism has to be added in a derived contract using {_mint}.\n For a generic mechanism see {ERC20PresetMinterPauser}.\n TIP: For a detailed writeup see our guide\n https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How\n to implement supply mechanisms].\n We have followed general OpenZeppelin guidelines: functions revert instead\n of returning `false` on failure. This behavior is nonetheless conventional\n and does not conflict with the expectations of ERC20 applications.\n Additionally, an {Approval} event is emitted on calls to {transferFrom}.\n This allows applications to reconstruct the allowance for all accounts just\n by listening to said events. Other implementations of the EIP may not emit\n these events, as it isn't required by the specification.\n Finally, the non-standard {decreaseAllowance} and {increaseAllowance}\n functions have been added to mitigate the well-known issues around setting\n allowances. See {IERC20-approve}." }, "fullyImplemented": true, "id": 1793, "linearizedBaseContracts": [ 1793, 1290, 1267, 1190 ], "name": "ERC20", "nodeType": "ContractDefinition", "nodes": [ { "constant": false, "id": 1302, "mutability": "mutable", "name": "_balances", "nodeType": "VariableDeclaration", "scope": 1793, "src": "5545:46:2", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" }, "typeName": { "id": 1301, "keyType": { "id": 1299, "name": "address", "nodeType": "ElementaryTypeName", "src": "5554:7:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Mapping", "src": "5545:28:2", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" }, "valueType": { "id": 1300, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "5565:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } }, "visibility": "private" }, { "constant": false, "id": 1308, "mutability": "mutable", "name": "_allowances", "nodeType": "VariableDeclaration", "scope": 1793, "src": "5600:69:2", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" }, "typeName": { "id": 1307, "keyType": { "id": 1303, "name": "address", "nodeType": "ElementaryTypeName", "src": "5609:7:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Mapping", "src": "5600:49:2", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" }, "valueType": { "id": 1306, "keyType": { "id": 1304, "name": "address", "nodeType": "ElementaryTypeName", "src": "5629:7:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Mapping", "src": "5620:28:2", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" }, "valueType": { "id": 1305, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "5640:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } } }, "visibility": "private" }, { "constant": false, "id": 1310, "mutability": "mutable", "name": "_totalSupply", "nodeType": "VariableDeclaration", "scope": 1793, "src": "5678:28:2", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1309, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "5678:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "private" }, { "constant": false, "id": 1312, "mutability": "mutable", "name": "_name", "nodeType": "VariableDeclaration", "scope": 1793, "src": "5715:20:2", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_string_storage", "typeString": "string" }, "typeName": { "id": 1311, "name": "string", "nodeType": "ElementaryTypeName", "src": "5715:6:2", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "visibility": "private" }, { "constant": false, "id": 1314, "mutability": "mutable", "name": "_symbol", "nodeType": "VariableDeclaration", "scope": 1793, "src": "5742:22:2", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_string_storage", "typeString": "string" }, "typeName": { "id": 1313, "name": "string", "nodeType": "ElementaryTypeName", "src": "5742:6:2", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "visibility": "private" }, { "body": { "id": 1330, "nodeType": "Block", "src": "6141:60:2", "statements": [ { "expression": { "id": 1324, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "id": 1322, "name": "_name", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1312, "src": "6152:5:2", "typeDescriptions": { "typeIdentifier": "t_string_storage", "typeString": "string storage ref" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "id": 1323, "name": "name_", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1317, "src": "6160:5:2", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string memory" } }, "src": "6152:13:2", "typeDescriptions": { "typeIdentifier": "t_string_storage", "typeString": "string storage ref" } }, "id": 1325, "nodeType": "ExpressionStatement", "src": "6152:13:2" }, { "expression": { "id": 1328, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "id": 1326, "name": "_symbol", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1314, "src": "6176:7:2", "typeDescriptions": { "typeIdentifier": "t_string_storage", "typeString": "string storage ref" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "id": 1327, "name": "symbol_", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1319, "src": "6186:7:2", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string memory" } }, "src": "6176:17:2", "typeDescriptions": { "typeIdentifier": "t_string_storage", "typeString": "string storage ref" } }, "id": 1329, "nodeType": "ExpressionStatement", "src": "6176:17:2" } ] }, "documentation": { "id": 1315, "nodeType": "StructuredDocumentation", "src": "5773:305:2", "text": " @dev Sets the values for {name} and {symbol}.\n The defaut value of {decimals} is 18. To select a different value for\n {decimals} you should overload it.\n All two of these values are immutable: they can only be set once during\n construction." }, "id": 1331, "implemented": true, "kind": "constructor", "modifiers": [], "name": "", "nodeType": "FunctionDefinition", "parameters": { "id": 1320, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1317, "mutability": "mutable", "name": "name_", "nodeType": "VariableDeclaration", "scope": 1331, "src": "6097:19:2", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string" }, "typeName": { "id": 1316, "name": "string", "nodeType": "ElementaryTypeName", "src": "6097:6:2", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "visibility": "internal" }, { "constant": false, "id": 1319, "mutability": "mutable", "name": "symbol_", "nodeType": "VariableDeclaration", "scope": 1331, "src": "6118:21:2", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string" }, "typeName": { "id": 1318, "name": "string", "nodeType": "ElementaryTypeName", "src": "6118:6:2", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "visibility": "internal" } ], "src": "6096:44:2" }, "returnParameters": { "id": 1321, "nodeType": "ParameterList", "parameters": [], "src": "6141:0:2" }, "scope": 1793, "src": "6084:117:2", "stateMutability": "nonpayable", "virtual": false, "visibility": "public" }, { "baseFunctions": [ 1277 ], "body": { "id": 1340, "nodeType": "Block", "src": "6340:31:2", "statements": [ { "expression": { "id": 1338, "name": "_name", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1312, "src": "6358:5:2", "typeDescriptions": { "typeIdentifier": "t_string_storage", "typeString": "string storage ref" } }, "functionReturnParameters": 1337, "id": 1339, "nodeType": "Return", "src": "6351:12:2" } ] }, "documentation": { "id": 1332, "nodeType": "StructuredDocumentation", "src": "6209:56:2", "text": " @dev Returns the name of the token." }, "functionSelector": "06fdde03", "id": 1341, "implemented": true, "kind": "function", "modifiers": [], "name": "name", "nodeType": "FunctionDefinition", "overrides": { "id": 1334, "nodeType": "OverrideSpecifier", "overrides": [], "src": "6307:8:2" }, "parameters": { "id": 1333, "nodeType": "ParameterList", "parameters": [], "src": "6284:2:2" }, "returnParameters": { "id": 1337, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1336, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 1341, "src": "6325:13:2", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string" }, "typeName": { "id": 1335, "name": "string", "nodeType": "ElementaryTypeName", "src": "6325:6:2", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "visibility": "internal" } ], "src": "6324:15:2" }, "scope": 1793, "src": "6271:100:2", "stateMutability": "view", "virtual": true, "visibility": "public" }, { "baseFunctions": [ 1283 ], "body": { "id": 1350, "nodeType": "Block", "src": "6561:33:2", "statements": [ { "expression": { "id": 1348, "name": "_symbol", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1314, "src": "6579:7:2", "typeDescriptions": { "typeIdentifier": "t_string_storage", "typeString": "string storage ref" } }, "functionReturnParameters": 1347, "id": 1349, "nodeType": "Return", "src": "6572:14:2" } ] }, "documentation": { "id": 1342, "nodeType": "StructuredDocumentation", "src": "6379:105:2", "text": " @dev Returns the symbol of the token, usually a shorter version of the\n name." }, "functionSelector": "95d89b41", "id": 1351, "implemented": true, "kind": "function", "modifiers": [], "name": "symbol", "nodeType": "FunctionDefinition", "overrides": { "id": 1344, "nodeType": "OverrideSpecifier", "overrides": [], "src": "6528:8:2" }, "parameters": { "id": 1343, "nodeType": "ParameterList", "parameters": [], "src": "6505:2:2" }, "returnParameters": { "id": 1347, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1346, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 1351, "src": "6546:13:2", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string" }, "typeName": { "id": 1345, "name": "string", "nodeType": "ElementaryTypeName", "src": "6546:6:2", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "visibility": "internal" } ], "src": "6545:15:2" }, "scope": 1793, "src": "6490:104:2", "stateMutability": "view", "virtual": true, "visibility": "public" }, { "baseFunctions": [ 1289 ], "body": { "id": 1360, "nodeType": "Block", "src": "7298:27:2", "statements": [ { "expression": { "hexValue": "30", "id": 1358, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "7316:1:2", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" }, "functionReturnParameters": 1357, "id": 1359, "nodeType": "Return", "src": "7309:8:2" } ] }, "documentation": { "id": 1352, "nodeType": "StructuredDocumentation", "src": "6602:625:2", "text": " @dev Returns the number of decimals used to get its user representation.\n For example, if `decimals` equals `2`, a balance of `505` tokens should\n be displayed to a user as `5,05` (`505 / 10 ** 2`).\n Tokens usually opt for a value of 18, imitating the relationship between\n Ether and Wei. This is the value {ERC20} uses, unless this function is\n overridden;\n NOTE: This information is only used for _display_ purposes: it in\n no way affects any of the arithmetic of the contract, including\n {IERC20-balanceOf} and {IERC20-transfer}." }, "functionSelector": "313ce567", "id": 1361, "implemented": true, "kind": "function", "modifiers": [], "name": "decimals", "nodeType": "FunctionDefinition", "overrides": { "id": 1354, "nodeType": "OverrideSpecifier", "overrides": [], "src": "7273:8:2" }, "parameters": { "id": 1353, "nodeType": "ParameterList", "parameters": [], "src": "7250:2:2" }, "returnParameters": { "id": 1357, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1356, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 1361, "src": "7291:5:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" }, "typeName": { "id": 1355, "name": "uint8", "nodeType": "ElementaryTypeName", "src": "7291:5:2", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "visibility": "internal" } ], "src": "7290:7:2" }, "scope": 1793, "src": "7233:92:2", "stateMutability": "view", "virtual": true, "visibility": "public" }, { "baseFunctions": [ 1198 ], "body": { "id": 1370, "nodeType": "Block", "src": "7460:38:2", "statements": [ { "expression": { "id": 1368, "name": "_totalSupply", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1310, "src": "7478:12:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "functionReturnParameters": 1367, "id": 1369, "nodeType": "Return", "src": "7471:19:2" } ] }, "documentation": { "id": 1362, "nodeType": "StructuredDocumentation", "src": "7333:51:2", "text": " @dev See {IERC20-totalSupply}." }, "functionSelector": "18160ddd", "id": 1371, "implemented": true, "kind": "function", "modifiers": [], "name": "totalSupply", "nodeType": "FunctionDefinition", "overrides": { "id": 1364, "nodeType": "OverrideSpecifier", "overrides": [], "src": "7433:8:2" }, "parameters": { "id": 1363, "nodeType": "ParameterList", "parameters": [], "src": "7410:2:2" }, "returnParameters": { "id": 1367, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1366, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 1371, "src": "7451:7:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1365, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "7451:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "7450:9:2" }, "scope": 1793, "src": "7390:108:2", "stateMutability": "view", "virtual": true, "visibility": "public" }, { "baseFunctions": [ 1206 ], "body": { "id": 1384, "nodeType": "Block", "src": "7644:44:2", "statements": [ { "expression": { "baseExpression": { "id": 1380, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1302, "src": "7662:9:2", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 1382, "indexExpression": { "id": 1381, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1374, "src": "7672:7:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "7662:18:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "functionReturnParameters": 1379, "id": 1383, "nodeType": "Return", "src": "7655:25:2" } ] }, "documentation": { "id": 1372, "nodeType": "StructuredDocumentation", "src": "7506:49:2", "text": " @dev See {IERC20-balanceOf}." }, "functionSelector": "70a08231", "id": 1385, "implemented": true, "kind": "function", "modifiers": [], "name": "balanceOf", "nodeType": "FunctionDefinition", "overrides": { "id": 1376, "nodeType": "OverrideSpecifier", "overrides": [], "src": "7617:8:2" }, "parameters": { "id": 1375, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1374, "mutability": "mutable", "name": "account", "nodeType": "VariableDeclaration", "scope": 1385, "src": "7580:15:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1373, "name": "address", "nodeType": "ElementaryTypeName", "src": "7580:7:2", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" } ], "src": "7579:17:2" }, "returnParameters": { "id": 1379, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1378, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 1385, "src": "7635:7:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1377, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "7635:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "7634:9:2" }, "scope": 1793, "src": "7561:127:2", "stateMutability": "view", "virtual": true, "visibility": "public" }, { "baseFunctions": [ 1216 ], "body": { "id": 1405, "nodeType": "Block", "src": "7993:83:2", "statements": [ { "expression": { "arguments": [ { "arguments": [], "expression": { "argumentTypes": [], "id": 1397, "name": "_msgSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1178, "src": "8014:10:2", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_address_$", "typeString": "function () view returns (address)" } }, "id": 1398, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8014:12:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1399, "name": "recipient", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1388, "src": "8028:9:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1400, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1390, "src": "8039:6:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1396, "name": "_transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1627, "src": "8004:9:2", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 1401, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8004:42:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1402, "nodeType": "ExpressionStatement", "src": "8004:42:2" }, { "expression": { "hexValue": "74727565", "id": 1403, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "8064:4:2", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "functionReturnParameters": 1395, "id": 1404, "nodeType": "Return", "src": "8057:11:2" } ] }, "documentation": { "id": 1386, "nodeType": "StructuredDocumentation", "src": "7696:199:2", "text": " @dev See {IERC20-transfer}.\n Requirements:\n - `recipient` cannot be the zero address.\n - the caller must have a balance of at least `amount`." }, "functionSelector": "a9059cbb", "id": 1406, "implemented": true, "kind": "function", "modifiers": [], "name": "transfer", "nodeType": "FunctionDefinition", "overrides": { "id": 1392, "nodeType": "OverrideSpecifier", "overrides": [], "src": "7969:8:2" }, "parameters": { "id": 1391, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1388, "mutability": "mutable", "name": "recipient", "nodeType": "VariableDeclaration", "scope": 1406, "src": "7919:17:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1387, "name": "address", "nodeType": "ElementaryTypeName", "src": "7919:7:2", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1390, "mutability": "mutable", "name": "amount", "nodeType": "VariableDeclaration", "scope": 1406, "src": "7938:14:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1389, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "7938:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "7918:35:2" }, "returnParameters": { "id": 1395, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1394, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 1406, "src": "7987:4:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 1393, "name": "bool", "nodeType": "ElementaryTypeName", "src": "7987:4:2", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "visibility": "internal" } ], "src": "7986:6:2" }, "scope": 1793, "src": "7901:175:2", "stateMutability": "nonpayable", "virtual": true, "visibility": "public" }, { "baseFunctions": [ 1226 ], "body": { "id": 1423, "nodeType": "Block", "src": "8237:53:2", "statements": [ { "expression": { "baseExpression": { "baseExpression": { "id": 1417, "name": "_allowances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1308, "src": "8255:11:2", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" } }, "id": 1419, "indexExpression": { "id": 1418, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1409, "src": "8267:5:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "8255:18:2", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 1421, "indexExpression": { "id": 1420, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1411, "src": "8274:7:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "8255:27:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "functionReturnParameters": 1416, "id": 1422, "nodeType": "Return", "src": "8248:34:2" } ] }, "documentation": { "id": 1407, "nodeType": "StructuredDocumentation", "src": "8084:49:2", "text": " @dev See {IERC20-allowance}." }, "functionSelector": "dd62ed3e", "id": 1424, "implemented": true, "kind": "function", "modifiers": [], "name": "allowance", "nodeType": "FunctionDefinition", "overrides": { "id": 1413, "nodeType": "OverrideSpecifier", "overrides": [], "src": "8210:8:2" }, "parameters": { "id": 1412, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1409, "mutability": "mutable", "name": "owner", "nodeType": "VariableDeclaration", "scope": 1424, "src": "8158:13:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1408, "name": "address", "nodeType": "ElementaryTypeName", "src": "8158:7:2", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1411, "mutability": "mutable", "name": "spender", "nodeType": "VariableDeclaration", "scope": 1424, "src": "8173:15:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1410, "name": "address", "nodeType": "ElementaryTypeName", "src": "8173:7:2", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" } ], "src": "8157:32:2" }, "returnParameters": { "id": 1416, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1415, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 1424, "src": "8228:7:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1414, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "8228:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "8227:9:2" }, "scope": 1793, "src": "8139:151:2", "stateMutability": "view", "virtual": true, "visibility": "public" }, { "baseFunctions": [ 1236 ], "body": { "id": 1444, "nodeType": "Block", "src": "8526:80:2", "statements": [ { "expression": { "arguments": [ { "arguments": [], "expression": { "argumentTypes": [], "id": 1436, "name": "_msgSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1178, "src": "8546:10:2", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_address_$", "typeString": "function () view returns (address)" } }, "id": 1437, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8546:12:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1438, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1427, "src": "8560:7:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1439, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1429, "src": "8569:6:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1435, "name": "_approve", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1781, "src": "8537:8:2", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 1440, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8537:39:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1441, "nodeType": "ExpressionStatement", "src": "8537:39:2" }, { "expression": { "hexValue": "74727565", "id": 1442, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "8594:4:2", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "functionReturnParameters": 1434, "id": 1443, "nodeType": "Return", "src": "8587:11:2" } ] }, "documentation": { "id": 1425, "nodeType": "StructuredDocumentation", "src": "8298:133:2", "text": " @dev See {IERC20-approve}.\n Requirements:\n - `spender` cannot be the zero address." }, "functionSelector": "095ea7b3", "id": 1445, "implemented": true, "kind": "function", "modifiers": [], "name": "approve", "nodeType": "FunctionDefinition", "overrides": { "id": 1431, "nodeType": "OverrideSpecifier", "overrides": [], "src": "8502:8:2" }, "parameters": { "id": 1430, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1427, "mutability": "mutable", "name": "spender", "nodeType": "VariableDeclaration", "scope": 1445, "src": "8454:15:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1426, "name": "address", "nodeType": "ElementaryTypeName", "src": "8454:7:2", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1429, "mutability": "mutable", "name": "amount", "nodeType": "VariableDeclaration", "scope": 1445, "src": "8471:14:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1428, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "8471:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "8453:33:2" }, "returnParameters": { "id": 1434, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1433, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 1445, "src": "8520:4:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 1432, "name": "bool", "nodeType": "ElementaryTypeName", "src": "8520:4:2", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "visibility": "internal" } ], "src": "8519:6:2" }, "scope": 1793, "src": "8437:169:2", "stateMutability": "nonpayable", "virtual": true, "visibility": "public" }, { "baseFunctions": [ 1248 ], "body": { "id": 1491, "nodeType": "Block", "src": "9200:310:2", "statements": [ { "expression": { "arguments": [ { "id": 1459, "name": "sender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1448, "src": "9221:6:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1460, "name": "recipient", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1450, "src": "9229:9:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1461, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1452, "src": "9240:6:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1458, "name": "_transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1627, "src": "9211:9:2", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 1462, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9211:36:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1463, "nodeType": "ExpressionStatement", "src": "9211:36:2" }, { "assignments": [ 1465 ], "declarations": [ { "constant": false, "id": 1465, "mutability": "mutable", "name": "currentAllowance", "nodeType": "VariableDeclaration", "scope": 1491, "src": "9260:24:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1464, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "9260:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "id": 1472, "initialValue": { "baseExpression": { "baseExpression": { "id": 1466, "name": "_allowances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1308, "src": "9287:11:2", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" } }, "id": 1468, "indexExpression": { "id": 1467, "name": "sender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1448, "src": "9299:6:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "9287:19:2", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 1471, "indexExpression": { "arguments": [], "expression": { "argumentTypes": [], "id": 1469, "name": "_msgSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1178, "src": "9307:10:2", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_address_$", "typeString": "function () view returns (address)" } }, "id": 1470, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9307:12:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "9287:33:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "VariableDeclarationStatement", "src": "9260:60:2" }, { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 1476, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 1474, "name": "currentAllowance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1465, "src": "9339:16:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": ">=", "rightExpression": { "id": 1475, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1452, "src": "9359:6:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "9339:26:2", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a207472616e7366657220616d6f756e74206578636565647320616c6c6f77616e6365", "id": 1477, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "9367:42:2", "typeDescriptions": { "typeIdentifier": "t_stringliteral_974d1b4421da69cc60b481194f0dad36a5bb4e23da810da7a7fb30cdba178330", "typeString": "literal_string \"ERC20: transfer amount exceeds allowance\"" }, "value": "ERC20: transfer amount exceeds allowance" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_974d1b4421da69cc60b481194f0dad36a5bb4e23da810da7a7fb30cdba178330", "typeString": "literal_string \"ERC20: transfer amount exceeds allowance\"" } ], "id": 1473, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "9331:7:2", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 1478, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9331:79:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1479, "nodeType": "ExpressionStatement", "src": "9331:79:2" }, { "expression": { "arguments": [ { "id": 1481, "name": "sender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1448, "src": "9430:6:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "arguments": [], "expression": { "argumentTypes": [], "id": 1482, "name": "_msgSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1178, "src": "9438:10:2", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_address_$", "typeString": "function () view returns (address)" } }, "id": 1483, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9438:12:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 1486, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 1484, "name": "currentAllowance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1465, "src": "9452:16:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "-", "rightExpression": { "id": 1485, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1452, "src": "9471:6:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "9452:25:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1480, "name": "_approve", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1781, "src": "9421:8:2", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 1487, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9421:57:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1488, "nodeType": "ExpressionStatement", "src": "9421:57:2" }, { "expression": { "hexValue": "74727565", "id": 1489, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "9498:4:2", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "functionReturnParameters": 1457, "id": 1490, "nodeType": "Return", "src": "9491:11:2" } ] }, "documentation": { "id": 1446, "nodeType": "StructuredDocumentation", "src": "8614:468:2", "text": " @dev See {IERC20-transferFrom}.\n Emits an {Approval} event indicating the updated allowance. This is not\n required by the EIP. See the note at the beginning of {ERC20}.\n Requirements:\n - `sender` and `recipient` cannot be the zero address.\n - `sender` must have a balance of at least `amount`.\n - the caller must have allowance for ``sender``'s tokens of at least\n `amount`." }, "functionSelector": "23b872dd", "id": 1492, "implemented": true, "kind": "function", "modifiers": [], "name": "transferFrom", "nodeType": "FunctionDefinition", "overrides": { "id": 1454, "nodeType": "OverrideSpecifier", "overrides": [], "src": "9176:8:2" }, "parameters": { "id": 1453, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1448, "mutability": "mutable", "name": "sender", "nodeType": "VariableDeclaration", "scope": 1492, "src": "9110:14:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1447, "name": "address", "nodeType": "ElementaryTypeName", "src": "9110:7:2", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1450, "mutability": "mutable", "name": "recipient", "nodeType": "VariableDeclaration", "scope": 1492, "src": "9126:17:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1449, "name": "address", "nodeType": "ElementaryTypeName", "src": "9126:7:2", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1452, "mutability": "mutable", "name": "amount", "nodeType": "VariableDeclaration", "scope": 1492, "src": "9145:14:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1451, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "9145:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "9109:51:2" }, "returnParameters": { "id": 1457, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1456, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 1492, "src": "9194:4:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 1455, "name": "bool", "nodeType": "ElementaryTypeName", "src": "9194:4:2", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "visibility": "internal" } ], "src": "9193:6:2" }, "scope": 1793, "src": "9088:422:2", "stateMutability": "nonpayable", "virtual": true, "visibility": "public" }, { "body": { "id": 1518, "nodeType": "Block", "src": "10013:121:2", "statements": [ { "expression": { "arguments": [ { "arguments": [], "expression": { "argumentTypes": [], "id": 1503, "name": "_msgSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1178, "src": "10033:10:2", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_address_$", "typeString": "function () view returns (address)" } }, "id": 1504, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10033:12:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1505, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1495, "src": "10047:7:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 1513, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "baseExpression": { "baseExpression": { "id": 1506, "name": "_allowances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1308, "src": "10056:11:2", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" } }, "id": 1509, "indexExpression": { "arguments": [], "expression": { "argumentTypes": [], "id": 1507, "name": "_msgSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1178, "src": "10068:10:2", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_address_$", "typeString": "function () view returns (address)" } }, "id": 1508, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10068:12:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "10056:25:2", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 1511, "indexExpression": { "id": 1510, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1495, "src": "10082:7:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "10056:34:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "+", "rightExpression": { "id": 1512, "name": "addedValue", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1497, "src": "10093:10:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "10056:47:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1502, "name": "_approve", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1781, "src": "10024:8:2", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 1514, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10024:80:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1515, "nodeType": "ExpressionStatement", "src": "10024:80:2" }, { "expression": { "hexValue": "74727565", "id": 1516, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "10122:4:2", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "functionReturnParameters": 1501, "id": 1517, "nodeType": "Return", "src": "10115:11:2" } ] }, "documentation": { "id": 1493, "nodeType": "StructuredDocumentation", "src": "9518:395:2", "text": " @dev Atomically increases the allowance granted to `spender` by the caller.\n This is an alternative to {approve} that can be used as a mitigation for\n problems described in {IERC20-approve}.\n Emits an {Approval} event indicating the updated allowance.\n Requirements:\n - `spender` cannot be the zero address." }, "functionSelector": "39509351", "id": 1519, "implemented": true, "kind": "function", "modifiers": [], "name": "increaseAllowance", "nodeType": "FunctionDefinition", "parameters": { "id": 1498, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1495, "mutability": "mutable", "name": "spender", "nodeType": "VariableDeclaration", "scope": 1519, "src": "9946:15:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1494, "name": "address", "nodeType": "ElementaryTypeName", "src": "9946:7:2", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1497, "mutability": "mutable", "name": "addedValue", "nodeType": "VariableDeclaration", "scope": 1519, "src": "9963:18:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1496, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "9963:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "9945:37:2" }, "returnParameters": { "id": 1501, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1500, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 1519, "src": "10007:4:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 1499, "name": "bool", "nodeType": "ElementaryTypeName", "src": "10007:4:2", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "visibility": "internal" } ], "src": "10006:6:2" }, "scope": 1793, "src": "9919:215:2", "stateMutability": "nonpayable", "virtual": true, "visibility": "public" }, { "body": { "id": 1556, "nodeType": "Block", "src": "10736:278:2", "statements": [ { "assignments": [ 1530 ], "declarations": [ { "constant": false, "id": 1530, "mutability": "mutable", "name": "currentAllowance", "nodeType": "VariableDeclaration", "scope": 1556, "src": "10747:24:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1529, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "10747:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "id": 1537, "initialValue": { "baseExpression": { "baseExpression": { "id": 1531, "name": "_allowances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1308, "src": "10774:11:2", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" } }, "id": 1534, "indexExpression": { "arguments": [], "expression": { "argumentTypes": [], "id": 1532, "name": "_msgSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1178, "src": "10786:10:2", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_address_$", "typeString": "function () view returns (address)" } }, "id": 1533, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10786:12:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "10774:25:2", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 1536, "indexExpression": { "id": 1535, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1522, "src": "10800:7:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "10774:34:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "VariableDeclarationStatement", "src": "10747:61:2" }, { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 1541, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 1539, "name": "currentAllowance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1530, "src": "10827:16:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": ">=", "rightExpression": { "id": 1540, "name": "subtractedValue", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1524, "src": "10847:15:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "10827:35:2", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a2064656372656173656420616c6c6f77616e63652062656c6f77207a65726f", "id": 1542, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "10864:39:2", "typeDescriptions": { "typeIdentifier": "t_stringliteral_f8b476f7d28209d77d4a4ac1fe36b9f8259aa1bb6bddfa6e89de7e51615cf8a8", "typeString": "literal_string \"ERC20: decreased allowance below zero\"" }, "value": "ERC20: decreased allowance below zero" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_f8b476f7d28209d77d4a4ac1fe36b9f8259aa1bb6bddfa6e89de7e51615cf8a8", "typeString": "literal_string \"ERC20: decreased allowance below zero\"" } ], "id": 1538, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "10819:7:2", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 1543, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10819:85:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1544, "nodeType": "ExpressionStatement", "src": "10819:85:2" }, { "expression": { "arguments": [ { "arguments": [], "expression": { "argumentTypes": [], "id": 1546, "name": "_msgSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1178, "src": "10924:10:2", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_address_$", "typeString": "function () view returns (address)" } }, "id": 1547, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10924:12:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1548, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1522, "src": "10938:7:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 1551, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 1549, "name": "currentAllowance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1530, "src": "10947:16:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "-", "rightExpression": { "id": 1550, "name": "subtractedValue", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1524, "src": "10966:15:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "10947:34:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1545, "name": "_approve", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1781, "src": "10915:8:2", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 1552, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10915:67:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1553, "nodeType": "ExpressionStatement", "src": "10915:67:2" }, { "expression": { "hexValue": "74727565", "id": 1554, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "11002:4:2", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "functionReturnParameters": 1528, "id": 1555, "nodeType": "Return", "src": "10995:11:2" } ] }, "documentation": { "id": 1520, "nodeType": "StructuredDocumentation", "src": "10142:489:2", "text": " @dev Atomically decreases the allowance granted to `spender` by the caller.\n This is an alternative to {approve} that can be used as a mitigation for\n problems described in {IERC20-approve}.\n Emits an {Approval} event indicating the updated allowance.\n Requirements:\n - `spender` cannot be the zero address.\n - `spender` must have allowance for the caller of at least\n `subtractedValue`." }, "functionSelector": "a457c2d7", "id": 1557, "implemented": true, "kind": "function", "modifiers": [], "name": "decreaseAllowance", "nodeType": "FunctionDefinition", "parameters": { "id": 1525, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1522, "mutability": "mutable", "name": "spender", "nodeType": "VariableDeclaration", "scope": 1557, "src": "10664:15:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1521, "name": "address", "nodeType": "ElementaryTypeName", "src": "10664:7:2", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1524, "mutability": "mutable", "name": "subtractedValue", "nodeType": "VariableDeclaration", "scope": 1557, "src": "10681:23:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1523, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "10681:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "10663:42:2" }, "returnParameters": { "id": 1528, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1527, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "scope": 1557, "src": "10730:4:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 1526, "name": "bool", "nodeType": "ElementaryTypeName", "src": "10730:4:2", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "visibility": "internal" } ], "src": "10729:6:2" }, "scope": 1793, "src": "10637:377:2", "stateMutability": "nonpayable", "virtual": true, "visibility": "public" }, { "body": { "id": 1626, "nodeType": "Block", "src": "11591:517:2", "statements": [ { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 1573, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 1568, "name": "sender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1560, "src": "11610:6:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "arguments": [ { "hexValue": "30", "id": 1571, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "11628:1:2", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 1570, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "11620:7:2", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 1569, "name": "address", "nodeType": "ElementaryTypeName", "src": "11620:7:2", "typeDescriptions": {} } }, "id": 1572, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "11620:10:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "11610:20:2", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a207472616e736665722066726f6d20746865207a65726f2061646472657373", "id": 1574, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "11632:39:2", "typeDescriptions": { "typeIdentifier": "t_stringliteral_baecc556b46f4ed0f2b4cb599d60785ac8563dd2dc0a5bf12edea1c39e5e1fea", "typeString": "literal_string \"ERC20: transfer from the zero address\"" }, "value": "ERC20: transfer from the zero address" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_baecc556b46f4ed0f2b4cb599d60785ac8563dd2dc0a5bf12edea1c39e5e1fea", "typeString": "literal_string \"ERC20: transfer from the zero address\"" } ], "id": 1567, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "11602:7:2", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 1575, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "11602:70:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1576, "nodeType": "ExpressionStatement", "src": "11602:70:2" }, { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 1583, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 1578, "name": "recipient", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1562, "src": "11691:9:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "arguments": [ { "hexValue": "30", "id": 1581, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "11712:1:2", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 1580, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "11704:7:2", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 1579, "name": "address", "nodeType": "ElementaryTypeName", "src": "11704:7:2", "typeDescriptions": {} } }, "id": 1582, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "11704:10:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "11691:23:2", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a207472616e7366657220746f20746865207a65726f2061646472657373", "id": 1584, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "11716:37:2", "typeDescriptions": { "typeIdentifier": "t_stringliteral_0557e210f7a69a685100a7e4e3d0a7024c546085cee28910fd17d0b081d9516f", "typeString": "literal_string \"ERC20: transfer to the zero address\"" }, "value": "ERC20: transfer to the zero address" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_0557e210f7a69a685100a7e4e3d0a7024c546085cee28910fd17d0b081d9516f", "typeString": "literal_string \"ERC20: transfer to the zero address\"" } ], "id": 1577, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "11683:7:2", "typeDescriptions": { "typeIdentifier": 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"tuple()" } }, "id": 1592, "nodeType": "ExpressionStatement", "src": "11767:47:2" }, { "assignments": [ 1594 ], "declarations": [ { "constant": false, "id": 1594, "mutability": "mutable", "name": "senderBalance", "nodeType": "VariableDeclaration", "scope": 1626, "src": "11827:21:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1593, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "11827:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "id": 1598, "initialValue": { "baseExpression": { "id": 1595, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1302, "src": "11851:9:2", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 1597, "indexExpression": { "id": 1596, "name": 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"id": 1601, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1564, "src": "11904:6:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "11887:23:2", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a207472616e7366657220616d6f756e7420657863656564732062616c616e6365", "id": 1603, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "11912:40:2", "typeDescriptions": { "typeIdentifier": "t_stringliteral_4107e8a8b9e94bf8ff83080ddec1c0bffe897ebc2241b89d44f66b3d274088b6", "typeString": "literal_string \"ERC20: transfer amount exceeds balance\"" }, "value": "ERC20: transfer amount exceeds balance" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_4107e8a8b9e94bf8ff83080ddec1c0bffe897ebc2241b89d44f66b3d274088b6", "typeString": "literal_string \"ERC20: transfer amount exceeds balance\"" } ], "id": 1599, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "11879:7:2", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 1604, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "11879:74:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1605, "nodeType": "ExpressionStatement", "src": "11879:74:2" }, { "expression": { "id": 1612, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "id": 1606, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1302, "src": "11964:9:2", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 1608, "indexExpression": { "id": 1607, "name": "sender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1560, "src": "11974:6:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "11964:17:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 1611, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 1609, "name": "senderBalance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1594, "src": "11984:13:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "-", "rightExpression": { "id": 1610, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1564, "src": "12000:6:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "11984:22:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "11964:42:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 1613, "nodeType": "ExpressionStatement", "src": "11964:42:2" }, { "expression": { "id": 1618, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "id": 1614, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1302, "src": "12017:9:2", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 1616, "indexExpression": { "id": 1615, "name": "recipient", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1562, "src": "12027:9:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "12017:20:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "+=", "rightHandSide": { "id": 1617, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1564, "src": "12041:6:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "12017:30:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 1619, "nodeType": "ExpressionStatement", "src": "12017:30:2" }, { "eventCall": { "arguments": [ { "id": 1621, "name": "sender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1560, "src": "12074:6:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1622, "name": "recipient", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1562, "src": "12082:9:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1623, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1564, "src": "12093:6:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1620, "name": "Transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1257, "src": "12065:8:2", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 1624, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "12065:35:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1625, "nodeType": "EmitStatement", "src": "12060:40:2" } ] }, "documentation": { "id": 1558, "nodeType": "StructuredDocumentation", "src": "11022:476:2", "text": " @dev Moves tokens `amount` from `sender` to `recipient`.\n This is internal function is equivalent to {transfer}, and can be used to\n e.g. implement automatic token fees, slashing mechanisms, etc.\n Emits a {Transfer} event.\n Requirements:\n - `sender` cannot be the zero address.\n - `recipient` cannot be the zero address.\n - `sender` must have a balance of at least `amount`." }, "id": 1627, "implemented": true, "kind": "function", "modifiers": [], "name": "_transfer", "nodeType": "FunctionDefinition", "parameters": { "id": 1565, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1560, "mutability": "mutable", "name": "sender", "nodeType": "VariableDeclaration", "scope": 1627, "src": "11523:14:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1559, "name": "address", "nodeType": "ElementaryTypeName", "src": "11523:7:2", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1562, "mutability": "mutable", "name": "recipient", "nodeType": "VariableDeclaration", "scope": 1627, "src": "11539:17:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1561, "name": "address", "nodeType": "ElementaryTypeName", "src": "11539:7:2", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1564, "mutability": "mutable", "name": "amount", "nodeType": "VariableDeclaration", "scope": 1627, "src": "11558:14:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1563, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "11558:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "11522:51:2" }, "returnParameters": { "id": 1566, "nodeType": "ParameterList", "parameters": [], "src": "11591:0:2" }, "scope": 1793, "src": "11504:604:2", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 1673, "nodeType": "Block", "src": "12455:273:2", "statements": [ { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 1641, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 1636, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1630, "src": "12474:7:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "arguments": [ { "hexValue": "30", "id": 1639, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "12493:1:2", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 1638, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "12485:7:2", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 1637, "name": "address", "nodeType": "ElementaryTypeName", "src": "12485:7:2", "typeDescriptions": {} } }, "id": 1640, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "12485:10:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "12474:21:2", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a206d696e7420746f20746865207a65726f2061646472657373", "id": 1642, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "12497:33:2", "typeDescriptions": { "typeIdentifier": "t_stringliteral_fc0b381caf0a47702017f3c4b358ebe3d3aff6c60ce819a8bf3ef5a95d4f202e", "typeString": "literal_string \"ERC20: mint to the zero address\"" }, "value": "ERC20: mint to the zero address" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_fc0b381caf0a47702017f3c4b358ebe3d3aff6c60ce819a8bf3ef5a95d4f202e", "typeString": "literal_string \"ERC20: mint to the zero address\"" } ], "id": 1635, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "12466:7:2", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 1643, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "12466:65:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1644, "nodeType": "ExpressionStatement", "src": "12466:65:2" }, { "expression": { "arguments": [ { "arguments": [ { "hexValue": "30", "id": 1648, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "12573:1:2", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 1647, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "12565:7:2", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 1646, "name": "address", "nodeType": "ElementaryTypeName", "src": "12565:7:2", "typeDescriptions": {} } }, "id": 1649, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "12565:10:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1650, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1630, "src": "12577:7:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1651, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1632, "src": "12586:6:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1645, "name": "_beforeTokenTransfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1792, "src": "12544:20:2", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 1652, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "12544:49:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1653, "nodeType": "ExpressionStatement", "src": "12544:49:2" }, { "expression": { "id": 1656, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "id": 1654, "name": "_totalSupply", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1310, "src": "12606:12:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "+=", "rightHandSide": { "id": 1655, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1632, "src": "12622:6:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "12606:22:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 1657, "nodeType": "ExpressionStatement", "src": "12606:22:2" }, { "expression": { "id": 1662, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "id": 1658, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1302, "src": "12639:9:2", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 1660, "indexExpression": { "id": 1659, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1630, "src": "12649:7:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "12639:18:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "+=", "rightHandSide": { "id": 1661, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1632, "src": "12661:6:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "12639:28:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 1663, "nodeType": "ExpressionStatement", "src": "12639:28:2" }, { "eventCall": { "arguments": [ { "arguments": [ { "hexValue": "30", "id": 1667, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "12700:1:2", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 1666, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "12692:7:2", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 1665, "name": "address", "nodeType": "ElementaryTypeName", "src": "12692:7:2", "typeDescriptions": {} } }, "id": 1668, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "12692:10:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1669, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1630, "src": "12704:7:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1670, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1632, "src": "12713:6:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1664, "name": "Transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1257, "src": "12683:8:2", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 1671, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "12683:37:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1672, "nodeType": "EmitStatement", "src": "12678:42:2" } ] }, "documentation": { "id": 1628, "nodeType": "StructuredDocumentation", "src": "12116:268:2", "text": "@dev Creates `amount` tokens and assigns them to `account`, increasing\n the total supply.\n Emits a {Transfer} event with `from` set to the zero address.\n Requirements:\n - `to` cannot be the zero address." }, "id": 1674, "implemented": true, "kind": "function", "modifiers": [], "name": "_mint", "nodeType": "FunctionDefinition", "parameters": { "id": 1633, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1630, "mutability": "mutable", "name": "account", "nodeType": "VariableDeclaration", "scope": 1674, "src": "12405:15:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1629, "name": "address", "nodeType": "ElementaryTypeName", "src": "12405:7:2", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1632, "mutability": "mutable", "name": "amount", "nodeType": "VariableDeclaration", "scope": 1674, "src": "12422:14:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1631, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "12422:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "12404:33:2" }, "returnParameters": { "id": 1634, "nodeType": "ParameterList", "parameters": [], "src": "12455:0:2" }, "scope": 1793, "src": "12390:338:2", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 1735, "nodeType": "Block", "src": "13126:429:2", "statements": [ { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 1688, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 1683, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1677, "src": "13145:7:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "arguments": [ { "hexValue": "30", "id": 1686, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "13164:1:2", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 1685, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "13156:7:2", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 1684, "name": "address", "nodeType": "ElementaryTypeName", "src": "13156:7:2", "typeDescriptions": {} } }, "id": 1687, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "13156:10:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "13145:21:2", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a206275726e2066726f6d20746865207a65726f2061646472657373", "id": 1689, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "13168:35:2", "typeDescriptions": { "typeIdentifier": "t_stringliteral_b16788493b576042bb52c50ed56189e0b250db113c7bfb1c3897d25cf9632d7f", "typeString": "literal_string \"ERC20: burn from the zero address\"" }, "value": "ERC20: burn from the zero address" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_b16788493b576042bb52c50ed56189e0b250db113c7bfb1c3897d25cf9632d7f", "typeString": "literal_string \"ERC20: burn from the zero address\"" } ], "id": 1682, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "13137:7:2", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 1690, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "13137:67:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1691, "nodeType": "ExpressionStatement", "src": "13137:67:2" }, { "expression": { "arguments": [ { "id": 1693, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1677, "src": "13238:7:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "arguments": [ { "hexValue": "30", "id": 1696, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "13255:1:2", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 1695, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "13247:7:2", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 1694, "name": "address", "nodeType": "ElementaryTypeName", "src": "13247:7:2", "typeDescriptions": {} } }, "id": 1697, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "13247:10:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1698, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1679, "src": "13259:6:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1692, "name": "_beforeTokenTransfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1792, "src": "13217:20:2", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 1699, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "13217:49:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1700, "nodeType": "ExpressionStatement", "src": "13217:49:2" }, { "assignments": [ 1702 ], "declarations": [ { "constant": false, "id": 1702, "mutability": "mutable", "name": "accountBalance", "nodeType": "VariableDeclaration", "scope": 1735, "src": "13279:22:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1701, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "13279:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "id": 1706, "initialValue": { "baseExpression": { "id": 1703, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1302, "src": "13304:9:2", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 1705, "indexExpression": { "id": 1704, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1677, "src": "13314:7:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "13304:18:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "VariableDeclarationStatement", "src": "13279:43:2" }, { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 1710, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 1708, "name": "accountBalance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1702, "src": "13341:14:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": ">=", "rightExpression": { "id": 1709, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1679, "src": "13359:6:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "13341:24:2", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a206275726e20616d6f756e7420657863656564732062616c616e6365", "id": 1711, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "13367:36:2", "typeDescriptions": { "typeIdentifier": "t_stringliteral_149b126e7125232b4200af45303d04fba8b74653b1a295a6a561a528c33fefdd", "typeString": "literal_string \"ERC20: burn amount exceeds balance\"" }, "value": "ERC20: burn amount exceeds balance" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_149b126e7125232b4200af45303d04fba8b74653b1a295a6a561a528c33fefdd", "typeString": "literal_string \"ERC20: burn amount exceeds balance\"" } ], "id": 1707, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "13333:7:2", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 1712, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "13333:71:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1713, "nodeType": "ExpressionStatement", "src": "13333:71:2" }, { "expression": { "id": 1720, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "id": 1714, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1302, "src": "13415:9:2", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 1716, "indexExpression": { "id": 1715, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1677, "src": "13425:7:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "13415:18:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 1719, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 1717, "name": "accountBalance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1702, "src": "13436:14:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "-", "rightExpression": { "id": 1718, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1679, "src": "13453:6:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "13436:23:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "13415:44:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 1721, "nodeType": "ExpressionStatement", "src": "13415:44:2" }, { "expression": { "id": 1724, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "id": 1722, "name": "_totalSupply", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1310, "src": "13470:12:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "-=", "rightHandSide": { "id": 1723, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1679, "src": "13486:6:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "13470:22:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 1725, "nodeType": "ExpressionStatement", "src": "13470:22:2" }, { "eventCall": { "arguments": [ { "id": 1727, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1677, "src": "13519:7:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "arguments": [ { "hexValue": "30", "id": 1730, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "13536:1:2", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 1729, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "13528:7:2", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 1728, "name": "address", "nodeType": "ElementaryTypeName", "src": "13528:7:2", "typeDescriptions": {} } }, "id": 1731, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "13528:10:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1732, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1679, "src": "13540:6:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1726, "name": "Transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1257, "src": "13510:8:2", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 1733, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "13510:37:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1734, "nodeType": "EmitStatement", "src": "13505:42:2" } ] }, "documentation": { "id": 1675, "nodeType": "StructuredDocumentation", "src": "12736:319:2", "text": " @dev Destroys `amount` tokens from `account`, reducing the\n total supply.\n Emits a {Transfer} event with `to` set to the zero address.\n Requirements:\n - `account` cannot be the zero address.\n - `account` must have at least `amount` tokens." }, "id": 1736, "implemented": true, "kind": "function", "modifiers": [], "name": "_burn", "nodeType": "FunctionDefinition", "parameters": { "id": 1680, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1677, "mutability": "mutable", "name": "account", "nodeType": "VariableDeclaration", "scope": 1736, "src": "13076:15:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1676, "name": "address", "nodeType": "ElementaryTypeName", "src": "13076:7:2", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1679, "mutability": "mutable", "name": "amount", "nodeType": "VariableDeclaration", "scope": 1736, "src": "13093:14:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1678, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "13093:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "13075:33:2" }, "returnParameters": { "id": 1681, "nodeType": "ParameterList", "parameters": [], "src": "13126:0:2" }, "scope": 1793, "src": "13061:494:2", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 1780, "nodeType": "Block", "src": "14076:263:2", "statements": [ { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 1752, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 1747, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1739, "src": "14095:5:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "arguments": [ { "hexValue": "30", "id": 1750, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "14112:1:2", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 1749, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "14104:7:2", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 1748, "name": "address", "nodeType": "ElementaryTypeName", "src": "14104:7:2", "typeDescriptions": {} } }, "id": 1751, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "14104:10:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "14095:19:2", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a20617070726f76652066726f6d20746865207a65726f2061646472657373", "id": 1753, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "14116:38:2", "typeDescriptions": { "typeIdentifier": "t_stringliteral_c953f4879035ed60e766b34720f656aab5c697b141d924c283124ecedb91c208", "typeString": "literal_string \"ERC20: approve from the zero address\"" }, "value": "ERC20: approve from the zero address" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_c953f4879035ed60e766b34720f656aab5c697b141d924c283124ecedb91c208", "typeString": "literal_string \"ERC20: approve from the zero address\"" } ], "id": 1746, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "14087:7:2", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 1754, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "14087:68:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1755, "nodeType": "ExpressionStatement", "src": "14087:68:2" }, { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 1762, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 1757, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1741, "src": "14174:7:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "arguments": [ { "hexValue": "30", "id": 1760, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "14193:1:2", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 1759, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "14185:7:2", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 1758, "name": "address", "nodeType": "ElementaryTypeName", "src": "14185:7:2", "typeDescriptions": {} } }, "id": 1761, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "14185:10:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "14174:21:2", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a20617070726f766520746f20746865207a65726f2061646472657373", "id": 1763, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "14197:36:2", "typeDescriptions": { "typeIdentifier": "t_stringliteral_24883cc5fe64ace9d0df1893501ecb93c77180f0ff69cca79affb3c316dc8029", "typeString": "literal_string \"ERC20: approve to the zero address\"" }, "value": "ERC20: approve to the zero address" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_24883cc5fe64ace9d0df1893501ecb93c77180f0ff69cca79affb3c316dc8029", "typeString": "literal_string \"ERC20: approve to the zero address\"" } ], "id": 1756, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "14166:7:2", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 1764, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "14166:68:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1765, "nodeType": "ExpressionStatement", "src": "14166:68:2" }, { "expression": { "id": 1772, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "baseExpression": { "id": 1766, "name": "_allowances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1308, "src": "14247:11:2", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" } }, "id": 1769, "indexExpression": { "id": 1767, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1739, "src": "14259:5:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "14247:18:2", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 1770, "indexExpression": { "id": 1768, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1741, "src": "14266:7:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "14247:27:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "id": 1771, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1743, "src": "14277:6:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "14247:36:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 1773, "nodeType": "ExpressionStatement", "src": "14247:36:2" }, { "eventCall": { "arguments": [ { "id": 1775, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1739, "src": "14308:5:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1776, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1741, "src": "14315:7:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1777, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1743, "src": "14324:6:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1774, "name": "Approval", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1266, "src": "14299:8:2", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 1778, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "14299:32:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1779, "nodeType": "EmitStatement", "src": "14294:37:2" } ] }, "documentation": { "id": 1737, "nodeType": "StructuredDocumentation", "src": "13563:424:2", "text": " @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.\n This internal function is equivalent to `approve`, and can be used to\n e.g. set automatic allowances for certain subsystems, etc.\n Emits an {Approval} event.\n Requirements:\n - `owner` cannot be the zero address.\n - `spender` cannot be the zero address." }, "id": 1781, "implemented": true, "kind": "function", "modifiers": [], "name": "_approve", "nodeType": "FunctionDefinition", "parameters": { "id": 1744, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1739, "mutability": "mutable", "name": "owner", "nodeType": "VariableDeclaration", "scope": 1781, "src": "14011:13:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1738, "name": "address", "nodeType": "ElementaryTypeName", "src": "14011:7:2", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1741, "mutability": "mutable", "name": "spender", "nodeType": "VariableDeclaration", "scope": 1781, "src": "14026:15:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1740, "name": "address", "nodeType": "ElementaryTypeName", "src": "14026:7:2", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1743, "mutability": "mutable", "name": "amount", "nodeType": "VariableDeclaration", "scope": 1781, "src": "14043:14:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1742, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "14043:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "14010:48:2" }, "returnParameters": { "id": 1745, "nodeType": "ParameterList", "parameters": [], "src": "14076:0:2" }, "scope": 1793, "src": "13993:346:2", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 1791, "nodeType": "Block", "src": "15031:3:2", "statements": [] }, "documentation": { "id": 1782, "nodeType": "StructuredDocumentation", "src": "14347:589:2", "text": " @dev Hook that is called before any transfer of tokens. This includes\n minting and burning.\n Calling conditions:\n - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens\n will be to transferred to `to`.\n - when `from` is zero, `amount` tokens will be minted for `to`.\n - when `to` is zero, `amount` of ``from``'s tokens will be burned.\n - `from` and `to` are never both zero.\n To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]." }, "id": 1792, "implemented": true, "kind": "function", "modifiers": [], "name": "_beforeTokenTransfer", "nodeType": "FunctionDefinition", "parameters": { "id": 1789, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1784, "mutability": "mutable", "name": "from", "nodeType": "VariableDeclaration", "scope": 1792, "src": "14972:12:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1783, "name": "address", "nodeType": "ElementaryTypeName", "src": "14972:7:2", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1786, "mutability": "mutable", "name": "to", "nodeType": "VariableDeclaration", "scope": 1792, "src": "14986:10:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1785, "name": "address", "nodeType": "ElementaryTypeName", "src": "14986:7:2", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1788, "mutability": "mutable", "name": "amount", "nodeType": "VariableDeclaration", "scope": 1792, "src": "14998:14:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1787, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "14998:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "14971:42:2" }, "returnParameters": { "id": 1790, "nodeType": "ParameterList", "parameters": [], "src": "15031:0:2" }, "scope": 1793, "src": "14942:92:2", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" } ], "scope": 1900, "src": "5488:9549:2" }, { "id": 1794, "literals": [ "solidity", "^", "0.8", ".0" ], "nodeType": "PragmaDirective", "src": "15043:23:2" }, { "abstract": true, "baseContracts": [ { "baseName": { "id": 1796, "name": "Context", "nodeType": "IdentifierPath", "referencedDeclaration": 1190, "src": "15321:7:2" }, "id": 1797, "nodeType": "InheritanceSpecifier", "src": "15321:7:2" }, { "baseName": { "id": 1798, "name": "ERC20", "nodeType": "IdentifierPath", "referencedDeclaration": 1793, "src": "15330:5:2" }, "id": 1799, "nodeType": "InheritanceSpecifier", "src": "15330:5:2" } ], "contractDependencies": [ 1190, 1267, 1290, 1793 ], "contractKind": "contract", "documentation": { "id": 1795, "nodeType": "StructuredDocumentation", "src": "15072:212:2", "text": " @dev Extension of {ERC20} that allows token holders to destroy both their own\n tokens and those that they have an allowance for, in a way that can be\n recognized off-chain (via event analysis)." }, "fullyImplemented": false, "id": 1851, "linearizedBaseContracts": [ 1851, 1793, 1290, 1267, 1190 ], "name": "ERC20Burnable", "nodeType": "ContractDefinition", "nodes": [ { "body": { "id": 1811, "nodeType": "Block", "src": "15496:46:2", "statements": [ { "expression": { "arguments": [ { "arguments": [], "expression": { "argumentTypes": [], "id": 1806, "name": "_msgSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1178, "src": "15513:10:2", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_address_$", "typeString": "function () view returns (address)" } }, "id": 1807, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "15513:12:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1808, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1802, "src": "15527:6:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1805, "name": "_burn", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1736, "src": "15507:5:2", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,uint256)" } }, "id": 1809, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "15507:27:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1810, "nodeType": "ExpressionStatement", "src": "15507:27:2" } ] }, "documentation": { "id": 1800, "nodeType": "StructuredDocumentation", "src": "15343:102:2", "text": " @dev Destroys `amount` tokens from the caller.\n See {ERC20-_burn}." }, "functionSelector": "42966c68", "id": 1812, "implemented": true, "kind": "function", "modifiers": [], "name": "burn", "nodeType": "FunctionDefinition", "parameters": { "id": 1803, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1802, "mutability": "mutable", "name": "amount", "nodeType": "VariableDeclaration", "scope": 1812, "src": "15465:14:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1801, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "15465:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "15464:16:2" }, "returnParameters": { "id": 1804, "nodeType": "ParameterList", "parameters": [], "src": "15496:0:2" }, "scope": 1851, "src": "15451:91:2", "stateMutability": "nonpayable", "virtual": true, "visibility": "public" }, { "body": { "id": 1849, "nodeType": "Block", "src": "15927:266:2", "statements": [ { "assignments": [ 1821 ], "declarations": [ { "constant": false, "id": 1821, "mutability": "mutable", "name": "currentAllowance", "nodeType": "VariableDeclaration", "scope": 1849, "src": "15938:24:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1820, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "15938:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "id": 1827, "initialValue": { "arguments": [ { "id": 1823, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1815, "src": "15975:7:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "arguments": [], "expression": { "argumentTypes": [], "id": 1824, "name": "_msgSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1178, "src": "15984:10:2", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_address_$", "typeString": "function () view returns (address)" } }, "id": 1825, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "15984:12:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" } ], "id": 1822, "name": "allowance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1424, "src": "15965:9:2", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_address_$_t_address_$returns$_t_uint256_$", "typeString": "function (address,address) view returns (uint256)" } }, "id": 1826, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "15965:32:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "VariableDeclarationStatement", "src": "15938:59:2" }, { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 1831, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 1829, "name": "currentAllowance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1821, "src": "16016:16:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": ">=", "rightExpression": { "id": 1830, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1817, "src": "16036:6:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "16016:26:2", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a206275726e20616d6f756e74206578636565647320616c6c6f77616e6365", "id": 1832, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "16044:38:2", "typeDescriptions": { "typeIdentifier": "t_stringliteral_a287c363786607a1457a2d9d12fa61c0073358e02d76b4035fc2c2d86a19c0db", "typeString": "literal_string \"ERC20: burn amount exceeds allowance\"" }, "value": "ERC20: burn amount exceeds allowance" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_a287c363786607a1457a2d9d12fa61c0073358e02d76b4035fc2c2d86a19c0db", "typeString": "literal_string \"ERC20: burn amount exceeds allowance\"" } ], "id": 1828, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "16008:7:2", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 1833, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "16008:75:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1834, "nodeType": "ExpressionStatement", "src": "16008:75:2" }, { "expression": { "arguments": [ { "id": 1836, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1815, "src": "16103:7:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "arguments": [], "expression": { "argumentTypes": [], "id": 1837, "name": "_msgSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1178, "src": "16112:10:2", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_address_$", "typeString": "function () view returns (address)" } }, "id": 1838, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "16112:12:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 1841, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 1839, "name": "currentAllowance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1821, "src": "16126:16:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "-", "rightExpression": { "id": 1840, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1817, "src": "16145:6:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "16126:25:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1835, "name": "_approve", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1781, "src": "16094:8:2", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 1842, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "16094:58:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1843, "nodeType": "ExpressionStatement", "src": "16094:58:2" }, { "expression": { "arguments": [ { "id": 1845, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1815, "src": "16169:7:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1846, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1817, "src": "16178:6:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1844, "name": "_burn", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1736, "src": "16163:5:2", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,uint256)" } }, "id": 1847, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "16163:22:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1848, "nodeType": "ExpressionStatement", "src": "16163:22:2" } ] }, "documentation": { "id": 1813, "nodeType": "StructuredDocumentation", "src": "15550:305:2", "text": " @dev Destroys `amount` tokens from `account`, deducting from the caller's\n allowance.\n See {ERC20-_burn} and {ERC20-allowance}.\n Requirements:\n - the caller must have allowance for ``accounts``'s tokens of at least\n `amount`." }, "functionSelector": "79cc6790", "id": 1850, "implemented": true, "kind": "function", "modifiers": [], "name": "burnFrom", "nodeType": "FunctionDefinition", "parameters": { "id": 1818, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1815, "mutability": "mutable", "name": "account", "nodeType": "VariableDeclaration", "scope": 1850, "src": "15879:15:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1814, "name": "address", "nodeType": "ElementaryTypeName", "src": "15879:7:2", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 1817, "mutability": "mutable", "name": "amount", "nodeType": "VariableDeclaration", "scope": 1850, "src": "15896:14:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1816, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "15896:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "15878:33:2" }, "returnParameters": { "id": 1819, "nodeType": "ParameterList", "parameters": [], "src": "15927:0:2" }, "scope": 1851, "src": "15861:332:2", "stateMutability": "nonpayable", "virtual": true, "visibility": "public" } ], "scope": 1900, "src": "15286:910:2" }, { "id": 1852, "literals": [ "solidity", "^", "0.8", ".0" ], "nodeType": "PragmaDirective", "src": "16200:23:2" }, { "abstract": false, "baseContracts": [ { "baseName": { "id": 1854, "name": "ERC20Burnable", "nodeType": "IdentifierPath", "referencedDeclaration": 1851, "src": "16631:13:2" }, "id": 1855, "nodeType": "InheritanceSpecifier", "src": "16631:13:2" } ], "contractDependencies": [ 1190, 1267, 1290, 1793, 1851 ], "contractKind": "contract", "documentation": { "id": 1853, "nodeType": "StructuredDocumentation", "src": "16227:367:2", "text": " @dev {ERC20} token, including:\n - Preminted initial supply\n - Ability for holders to burn (destroy) their tokens\n - No access control mechanism (for minting/pausing) and hence no governance\n This contract uses {ERC20Burnable} to include burn capabilities - head to\n its documentation for details.\n _Available since v3.4._" }, "fullyImplemented": true, "id": 1878, "linearizedBaseContracts": [ 1878, 1851, 1793, 1290, 1267, 1190 ], "name": "ERC20PresetFixedSupply", "nodeType": "ContractDefinition", "nodes": [ { "body": { "id": 1876, "nodeType": "Block", "src": "16948:46:2", "statements": [ { "expression": { "arguments": [ { "id": 1872, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1864, "src": "16965:5:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 1873, "name": "initialSupply", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1862, "src": "16972:13:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1871, "name": "_mint", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1674, "src": "16959:5:2", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,uint256)" } }, "id": 1874, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "16959:27:2", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1875, "nodeType": "ExpressionStatement", "src": "16959:27:2" } ] }, "documentation": { "id": 1856, "nodeType": "StructuredDocumentation", "src": "16652:135:2", "text": " @dev Mints `initialSupply` amount of token and transfers them to `owner`.\n See {ERC20-constructor}." }, "id": 1877, "implemented": true, "kind": "constructor", "modifiers": [ { "arguments": [ { "id": 1867, "name": "name", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1858, "src": "16934:4:2", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string memory" } }, { "id": 1868, "name": "symbol", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1860, "src": "16940:6:2", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string memory" } } ], "id": 1869, "modifierName": { "id": 1866, "name": "ERC20", "nodeType": "IdentifierPath", "referencedDeclaration": 1793, "src": "16928:5:2" }, "nodeType": "ModifierInvocation", "src": "16928:19:2" } ], "name": "", "nodeType": "FunctionDefinition", "parameters": { "id": 1865, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1858, "mutability": "mutable", "name": "name", "nodeType": "VariableDeclaration", "scope": 1877, "src": "16815:18:2", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string" }, "typeName": { "id": 1857, "name": "string", "nodeType": "ElementaryTypeName", "src": "16815:6:2", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "visibility": "internal" }, { "constant": false, "id": 1860, "mutability": "mutable", "name": "symbol", "nodeType": "VariableDeclaration", "scope": 1877, "src": "16844:20:2", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string" }, "typeName": { "id": 1859, "name": "string", "nodeType": "ElementaryTypeName", "src": "16844:6:2", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "visibility": "internal" }, { "constant": false, "id": 1862, "mutability": "mutable", "name": "initialSupply", "nodeType": "VariableDeclaration", "scope": 1877, "src": "16875:21:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1861, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "16875:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" }, { "constant": false, "id": 1864, "mutability": "mutable", "name": "owner", "nodeType": "VariableDeclaration", "scope": 1877, "src": "16907:13:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1863, "name": "address", "nodeType": "ElementaryTypeName", "src": "16907:7:2", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" } ], "src": "16804:123:2" }, "returnParameters": { "id": 1870, "nodeType": "ParameterList", "parameters": [], "src": "16948:0:2" }, "scope": 1878, "src": "16793:201:2", "stateMutability": "nonpayable", "virtual": false, "visibility": "public" } ], "scope": 1900, "src": "16596:401:2" }, { "id": 1879, "literals": [ "solidity", "0.8", ".0" ], "nodeType": "PragmaDirective", "src": "17003:22:2" }, { "abstract": false, "baseContracts": [ { "baseName": { "id": 1880, "name": "ERC20PresetFixedSupply", "nodeType": "IdentifierPath", "referencedDeclaration": 1878, "src": "17051:22:2" }, "id": 1881, "nodeType": "InheritanceSpecifier", "src": "17051:22:2" } ], "contractDependencies": [ 1190, 1267, 1290, 1793, 1851, 1878 ], "contractKind": "contract", "fullyImplemented": true, "id": 1899, "linearizedBaseContracts": [ 1899, 1878, 1851, 1793, 1290, 1267, 1190 ], "name": "CustomERC20", "nodeType": "ContractDefinition", "nodes": [ { "body": { "id": 1897, "nodeType": "Block", "src": "17247:9:2", "statements": [] }, "id": 1898, "implemented": true, "kind": "constructor", "modifiers": [ { "arguments": [ { "id": 1890, "name": "_name", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1883, "src": "17188:5:2", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string memory" } }, { "id": 1891, "name": "_symbol", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1885, "src": "17195:7:2", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string memory" } }, { "id": 1892, "name": "_supply", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1887, "src": "17204:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "expression": { "id": 1893, "name": "msg", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4294967281, "src": "17212:3:2", "typeDescriptions": { "typeIdentifier": "t_magic_message", "typeString": "msg" } }, "id": 1894, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sender", "nodeType": "MemberAccess", "src": "17212:10:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } ], "id": 1895, "modifierName": { "id": 1889, "name": "ERC20PresetFixedSupply", "nodeType": "IdentifierPath", "referencedDeclaration": 1878, "src": "17165:22:2" }, "nodeType": "ModifierInvocation", "src": "17165:58:2" } ], "name": "", "nodeType": "FunctionDefinition", "parameters": { "id": 1888, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1883, "mutability": "mutable", "name": "_name", "nodeType": "VariableDeclaration", "scope": 1898, "src": "17094:19:2", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string" }, "typeName": { "id": 1882, "name": "string", "nodeType": "ElementaryTypeName", "src": "17094:6:2", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "visibility": "internal" }, { "constant": false, "id": 1885, "mutability": "mutable", "name": "_symbol", "nodeType": "VariableDeclaration", "scope": 1898, "src": "17115:21:2", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string" }, "typeName": { "id": 1884, "name": "string", "nodeType": "ElementaryTypeName", "src": "17115:6:2", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "visibility": "internal" }, { "constant": false, "id": 1887, "mutability": "mutable", "name": "_supply", "nodeType": "VariableDeclaration", "scope": 1898, "src": "17138:15:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1886, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "17138:7:2", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "17093:61:2" }, "returnParameters": { "id": 1896, "nodeType": "ParameterList", "parameters": [], "src": "17247:0:2" }, "scope": 1899, "src": "17082:174:2", "stateMutability": "nonpayable", "virtual": false, "visibility": "public" } ], "scope": 1900, "src": "17027:232:2" } ], "src": "35:17224:2" }, "compiler": { "name": "solc", "version": "0.8.0+commit.c7dfd78e.Emscripten.clang" }, "networks": {}, "schemaVersion": "3.3.4", "updatedAt": "2021-05-19T08:21:33.322Z", "devdoc": { "details": "Interface of the ERC20 standard as defined in the EIP.", "events": { "Approval(address,address,uint256)": { "details": "Emitted when the allowance of a `spender` for an `owner` is set by a call to {approve}. `value` is the new allowance." }, "Transfer(address,address,uint256)": { "details": "Emitted when `value` tokens are moved from one account (`from`) to another (`to`). Note that `value` may be zero." } }, "kind": "dev", "methods": { "allowance(address,address)": { "details": "Returns the remaining number of tokens that `spender` will be allowed to spend on behalf of `owner` through {transferFrom}. This is zero by default. This value changes when {approve} or {transferFrom} are called." }, "approve(address,uint256)": { "details": "Sets `amount` as the allowance of `spender` over the caller's tokens. Returns a boolean value indicating whether the operation succeeded. IMPORTANT: Beware that changing an allowance with this method brings the risk that someone may use both the old and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards: https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 Emits an {Approval} event." }, "balanceOf(address)": { "details": "Returns the amount of tokens owned by `account`." }, "totalSupply()": { "details": "Returns the amount of tokens in existence." }, "transfer(address,uint256)": { "details": "Moves `amount` tokens from the caller's account to `recipient`. Returns a boolean value indicating whether the operation succeeded. Emits a {Transfer} event." }, "transferFrom(address,address,uint256)": { "details": "Moves `amount` tokens from `sender` to `recipient` using the allowance mechanism. `amount` is then deducted from the caller's allowance. Returns a boolean value indicating whether the operation succeeded. Emits a {Transfer} event." } }, "version": 1 }, "userdoc": { "kind": "user", "methods": {}, "version": 1 } }