{ "address": "0x5C4e7Ba1E219E47948e6e3F55019A647bA501005", "abi": [ { "inputs": [ { "internalType": "address", "name": "_upgrader", "type": "address" }, { "internalType": "address", "name": "_governanceToken", "type": "address" } ], "stateMutability": "nonpayable", "type": "constructor" }, { "anonymous": false, "inputs": [ { "indexed": true, "internalType": "address", "name": "previousOwner", "type": "address" }, { "indexed": true, "internalType": "address", "name": "newOwner", "type": "address" } ], "name": "OwnershipTransferred", "type": "event" }, { "inputs": [], "name": "DENOMINATOR", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" } ], "stateMutability": "view", "type": "function" }, { "inputs": [], "name": "MINT_CAP", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" } ], "stateMutability": "view", "type": "function" }, { "inputs": [], "name": "MINT_PERIOD", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" } ], "stateMutability": "view", "type": "function" }, { "inputs": [], "name": "governanceToken", "outputs": [ { "internalType": "contract GovernanceToken", "name": "", "type": "address" } ], "stateMutability": "view", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "_account", "type": "address" }, { "internalType": "uint256", "name": "_amount", "type": "uint256" } ], "name": "mint", "outputs": [], "stateMutability": "nonpayable", "type": "function" }, { "inputs": [], "name": "mintPermittedAfter", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" } ], "stateMutability": "view", "type": "function" }, { "inputs": [], "name": "owner", "outputs": [ { "internalType": "address", "name": "", "type": "address" } ], "stateMutability": "view", "type": "function" }, { "inputs": [], "name": "renounceOwnership", "outputs": [], "stateMutability": "nonpayable", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "newOwner", "type": 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"{\"compiler\":{\"version\":\"0.8.12+commit.f00d7308\"},\"language\":\"Solidity\",\"output\":{\"abi\":[{\"inputs\":[{\"internalType\":\"address\",\"name\":\"_upgrader\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"_governanceToken\",\"type\":\"address\"}],\"stateMutability\":\"nonpayable\",\"type\":\"constructor\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"previousOwner\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"newOwner\",\"type\":\"address\"}],\"name\":\"OwnershipTransferred\",\"type\":\"event\"},{\"inputs\":[],\"name\":\"DENOMINATOR\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"MINT_CAP\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"MINT_PERIOD\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"governanceToken\",\"outputs\":[{\"internalType\":\"contract GovernanceToken\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"_account\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"_amount\",\"type\":\"uint256\"}],\"name\":\"mint\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"mintPermittedAfter\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"owner\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"renounceOwnership\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"newOwner\",\"type\":\"address\"}],\"name\":\"transferOwnership\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"_newMintManager\",\"type\":\"address\"}],\"name\":\"upgrade\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"}],\"devdoc\":{\"kind\":\"dev\",\"methods\":{\"constructor\":{\"params\":{\"_governanceToken\":\"The governance token this contract can mint tokens of\",\"_upgrader\":\"The owner of this contract\"}},\"mint(address,uint256)\":{\"params\":{\"_account\":\"Address to mint new tokens to.\",\"_amount\":\"Amount of tokens to be minted.\"}},\"owner()\":{\"details\":\"Returns the address of the current owner.\"},\"renounceOwnership()\":{\"details\":\"Leaves the contract without owner. It will not be possible to call `onlyOwner` functions anymore. Can only be called by the current owner. NOTE: Renouncing ownership will leave the contract without an owner, thereby removing any functionality that is only available to the owner.\"},\"transferOwnership(address)\":{\"details\":\"Transfers ownership of the contract to a new account (`newOwner`). Can only be called by the current owner.\"},\"upgrade(address)\":{\"params\":{\"_newMintManager\":\"The MintManager to upgrade to\"}}},\"title\":\"MintManager\",\"version\":1},\"userdoc\":{\"kind\":\"user\",\"methods\":{\"DENOMINATOR()\":{\"notice\":\"The number of decimals for the MINT_CAP.\"},\"MINT_CAP()\":{\"notice\":\"The amount of tokens that can be minted per year. The value is a fixed point number with 4 decimals.\"},\"MINT_PERIOD()\":{\"notice\":\"The amount of time that must pass before the MINT_CAP number of tokens can be minted again.\"},\"governanceToken()\":{\"notice\":\"The GovernanceToken that the MintManager can mint tokens\"},\"mint(address,uint256)\":{\"notice\":\"Only the token owner is allowed to mint a certain amount of OP per year.\"},\"mintPermittedAfter()\":{\"notice\":\"Tracks the time of last mint\"},\"upgrade(address)\":{\"notice\":\"Upgrade the owner of the governance token to a new MintManager.\"}},\"notice\":\"Set as `owner` of the OP token and responsible for the token inflation schedule. Contract acts as the token \\\"mint manager\\\" with permission to the `mint` function only. Currently permitted to mint once per year of up to 2% of the total token supply. Upgradable to allow changes in the inflation schedule.\",\"version\":1}},\"settings\":{\"compilationTarget\":{\"contracts/MintManager.sol\":\"MintManager\"},\"evmVersion\":\"london\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\",\"useLiteralContent\":true},\"optimizer\":{\"enabled\":false,\"runs\":200},\"remappings\":[]},\"sources\":{\"@openzeppelin/contracts/access/Ownable.sol\":{\"content\":\"// SPDX-License-Identifier: MIT\\n// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)\\n\\npragma solidity ^0.8.0;\\n\\nimport \\\"../utils/Context.sol\\\";\\n\\n/**\\n * @dev Contract module which provides a basic access control mechanism, where\\n * there is an account (an owner) that can be granted exclusive access to\\n * specific functions.\\n *\\n * By default, the owner account will be the one that deploys the contract. This\\n * can later be changed with {transferOwnership}.\\n *\\n * This module is used through inheritance. It will make available the modifier\\n * `onlyOwner`, which can be applied to your functions to restrict their use to\\n * the owner.\\n */\\nabstract contract Ownable is Context {\\n address private _owner;\\n\\n event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\\n\\n /**\\n * @dev Initializes the contract setting the deployer as the initial owner.\\n */\\n constructor() {\\n _transferOwnership(_msgSender());\\n }\\n\\n /**\\n * @dev Returns the address of the current owner.\\n */\\n function owner() public view virtual returns (address) {\\n return _owner;\\n }\\n\\n /**\\n * @dev Throws if called by any account other than the owner.\\n */\\n modifier onlyOwner() {\\n require(owner() == _msgSender(), \\\"Ownable: caller is not the owner\\\");\\n _;\\n }\\n\\n /**\\n * @dev Leaves the contract without owner. It will not be possible to call\\n * `onlyOwner` functions anymore. Can only be called by the current owner.\\n *\\n * NOTE: Renouncing ownership will leave the contract without an owner,\\n * thereby removing any functionality that is only available to the owner.\\n */\\n function renounceOwnership() public virtual onlyOwner {\\n _transferOwnership(address(0));\\n }\\n\\n /**\\n * @dev Transfers ownership of the contract to a new account (`newOwner`).\\n * Can only be called by the current owner.\\n */\\n function transferOwnership(address newOwner) public virtual onlyOwner {\\n require(newOwner != address(0), \\\"Ownable: new owner is the zero address\\\");\\n _transferOwnership(newOwner);\\n }\\n\\n /**\\n * @dev Transfers ownership of the contract to a new account (`newOwner`).\\n * Internal function without access restriction.\\n */\\n function _transferOwnership(address newOwner) internal virtual {\\n address oldOwner = _owner;\\n _owner = newOwner;\\n emit OwnershipTransferred(oldOwner, newOwner);\\n }\\n}\\n\",\"keccak256\":\"0x24e0364e503a9bbde94c715d26573a76f14cd2a202d45f96f52134ab806b67b9\",\"license\":\"MIT\"},\"@openzeppelin/contracts/governance/utils/IVotes.sol\":{\"content\":\"// SPDX-License-Identifier: MIT\\n// OpenZeppelin Contracts (last updated v4.5.0) (governance/utils/IVotes.sol)\\npragma solidity ^0.8.0;\\n\\n/**\\n * @dev Common interface for {ERC20Votes}, {ERC721Votes}, and other {Votes}-enabled contracts.\\n *\\n * _Available since v4.5._\\n */\\ninterface IVotes {\\n /**\\n * @dev Emitted when an account changes their delegate.\\n */\\n event DelegateChanged(address indexed delegator, address indexed fromDelegate, address indexed toDelegate);\\n\\n /**\\n * @dev Emitted when a token transfer or delegate change results in changes to a delegate's number of votes.\\n */\\n event DelegateVotesChanged(address indexed delegate, uint256 previousBalance, uint256 newBalance);\\n\\n /**\\n * @dev Returns the current amount of votes that `account` has.\\n */\\n function getVotes(address account) external view returns (uint256);\\n\\n /**\\n * @dev Returns the amount of votes that `account` had at the end of a past block (`blockNumber`).\\n */\\n function getPastVotes(address account, uint256 blockNumber) external view returns (uint256);\\n\\n /**\\n * @dev Returns the total supply of votes available at the end of a past block (`blockNumber`).\\n *\\n * NOTE: This value is the sum of all available votes, which is not necessarily the sum of all delegated votes.\\n * Votes that have not been delegated are still part of total supply, even though they would not participate in a\\n * vote.\\n */\\n function getPastTotalSupply(uint256 blockNumber) external view returns (uint256);\\n\\n /**\\n * @dev Returns the delegate that `account` has chosen.\\n */\\n function delegates(address account) external view returns (address);\\n\\n /**\\n * @dev Delegates votes from the sender to `delegatee`.\\n */\\n function delegate(address delegatee) external;\\n\\n /**\\n * @dev Delegates votes from signer to `delegatee`.\\n */\\n function delegateBySig(\\n address delegatee,\\n uint256 nonce,\\n uint256 expiry,\\n uint8 v,\\n bytes32 r,\\n bytes32 s\\n ) external;\\n}\\n\",\"keccak256\":\"0xf5324a55ee9c0b4a840ea57c055ac9d046f88986ceef567e1cf68113e46a79c0\",\"license\":\"MIT\"},\"@openzeppelin/contracts/token/ERC20/ERC20.sol\":{\"content\":\"// SPDX-License-Identifier: MIT\\n// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC20/ERC20.sol)\\n\\npragma solidity ^0.8.0;\\n\\nimport \\\"./IERC20.sol\\\";\\nimport \\\"./extensions/IERC20Metadata.sol\\\";\\nimport \\\"../../utils/Context.sol\\\";\\n\\n/**\\n * @dev Implementation of the {IERC20} interface.\\n *\\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 *\\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 *\\n * We have followed general OpenZeppelin Contracts guidelines: functions revert\\n * instead returning `false` on failure. This behavior is nonetheless\\n * conventional and does not conflict with the expectations of ERC20\\n * applications.\\n *\\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 *\\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}.\\n */\\ncontract ERC20 is Context, IERC20, IERC20Metadata {\\n mapping(address => uint256) private _balances;\\n\\n mapping(address => mapping(address => uint256)) private _allowances;\\n\\n uint256 private _totalSupply;\\n\\n string private _name;\\n string private _symbol;\\n\\n /**\\n * @dev Sets the values for {name} and {symbol}.\\n *\\n * The default value of {decimals} is 18. To select a different value for\\n * {decimals} you should overload it.\\n *\\n * All two of these values are immutable: they can only be set once during\\n * construction.\\n */\\n constructor(string memory name_, string memory symbol_) {\\n _name = name_;\\n _symbol = symbol_;\\n }\\n\\n /**\\n * @dev Returns the name of the token.\\n */\\n function name() public view virtual override returns (string memory) {\\n return _name;\\n }\\n\\n /**\\n * @dev Returns the symbol of the token, usually a shorter version of the\\n * name.\\n */\\n function symbol() public view virtual override returns (string memory) {\\n return _symbol;\\n }\\n\\n /**\\n * @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 *\\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 *\\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}.\\n */\\n function decimals() public view virtual override returns (uint8) {\\n return 18;\\n }\\n\\n /**\\n * @dev See {IERC20-totalSupply}.\\n */\\n function totalSupply() public view virtual override returns (uint256) {\\n return _totalSupply;\\n }\\n\\n /**\\n * @dev See {IERC20-balanceOf}.\\n */\\n function balanceOf(address account) public view virtual override returns (uint256) {\\n return _balances[account];\\n }\\n\\n /**\\n * @dev See {IERC20-transfer}.\\n *\\n * Requirements:\\n *\\n * - `to` cannot be the zero address.\\n * - the caller must have a balance of at least `amount`.\\n */\\n function transfer(address to, uint256 amount) public virtual override returns (bool) {\\n address owner = _msgSender();\\n _transfer(owner, to, amount);\\n return true;\\n }\\n\\n /**\\n * @dev See {IERC20-allowance}.\\n */\\n function allowance(address owner, address spender) public view virtual override returns (uint256) {\\n return _allowances[owner][spender];\\n }\\n\\n /**\\n * @dev See {IERC20-approve}.\\n *\\n * NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on\\n * `transferFrom`. This is semantically equivalent to an infinite approval.\\n *\\n * Requirements:\\n *\\n * - `spender` cannot be the zero address.\\n */\\n function approve(address spender, uint256 amount) public virtual override returns (bool) {\\n address owner = _msgSender();\\n _approve(owner, spender, amount);\\n return true;\\n }\\n\\n /**\\n * @dev See {IERC20-transferFrom}.\\n *\\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 *\\n * NOTE: Does not update the allowance if the current allowance\\n * is the maximum `uint256`.\\n *\\n * Requirements:\\n *\\n * - `from` and `to` cannot be the zero address.\\n * - `from` must have a balance of at least `amount`.\\n * - the caller must have allowance for ``from``'s tokens of at least\\n * `amount`.\\n */\\n function transferFrom(\\n address from,\\n address to,\\n uint256 amount\\n ) public virtual override returns (bool) {\\n address spender = _msgSender();\\n _spendAllowance(from, spender, amount);\\n _transfer(from, to, amount);\\n return true;\\n }\\n\\n /**\\n * @dev Atomically increases the allowance granted to `spender` by the caller.\\n *\\n * This is an alternative to {approve} that can be used as a mitigation for\\n * problems described in {IERC20-approve}.\\n *\\n * Emits an {Approval} event indicating the updated allowance.\\n *\\n * Requirements:\\n *\\n * - `spender` cannot be the zero address.\\n */\\n function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {\\n address owner = _msgSender();\\n _approve(owner, spender, _allowances[owner][spender] + addedValue);\\n return true;\\n }\\n\\n /**\\n * @dev Atomically decreases the allowance granted to `spender` by the caller.\\n *\\n * This is an alternative to {approve} that can be used as a mitigation for\\n * problems described in {IERC20-approve}.\\n *\\n * Emits an {Approval} event indicating the updated allowance.\\n *\\n * Requirements:\\n *\\n * - `spender` cannot be the zero address.\\n * - `spender` must have allowance for the caller of at least\\n * `subtractedValue`.\\n */\\n function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {\\n address owner = _msgSender();\\n uint256 currentAllowance = _allowances[owner][spender];\\n require(currentAllowance >= subtractedValue, \\\"ERC20: decreased allowance below zero\\\");\\n unchecked {\\n _approve(owner, spender, currentAllowance - subtractedValue);\\n }\\n\\n return true;\\n }\\n\\n /**\\n * @dev Moves `amount` of tokens from `sender` to `recipient`.\\n *\\n * This internal function is equivalent to {transfer}, and can be used to\\n * e.g. implement automatic token fees, slashing mechanisms, etc.\\n *\\n * Emits a {Transfer} event.\\n *\\n * Requirements:\\n *\\n * - `from` cannot be the zero address.\\n * - `to` cannot be the zero address.\\n * - `from` must have a balance of at least `amount`.\\n */\\n function _transfer(\\n address from,\\n address to,\\n uint256 amount\\n ) internal virtual {\\n require(from != address(0), \\\"ERC20: transfer from the zero address\\\");\\n require(to != address(0), \\\"ERC20: transfer to the zero address\\\");\\n\\n _beforeTokenTransfer(from, to, amount);\\n\\n uint256 fromBalance = _balances[from];\\n require(fromBalance >= amount, \\\"ERC20: transfer amount exceeds balance\\\");\\n unchecked {\\n _balances[from] = fromBalance - amount;\\n }\\n _balances[to] += amount;\\n\\n emit Transfer(from, to, amount);\\n\\n _afterTokenTransfer(from, to, amount);\\n }\\n\\n /** @dev Creates `amount` tokens and assigns them to `account`, increasing\\n * the total supply.\\n *\\n * Emits a {Transfer} event with `from` set to the zero address.\\n *\\n * Requirements:\\n *\\n * - `account` cannot be the zero address.\\n */\\n function _mint(address account, uint256 amount) internal virtual {\\n require(account != address(0), \\\"ERC20: mint to the zero address\\\");\\n\\n _beforeTokenTransfer(address(0), account, amount);\\n\\n _totalSupply += amount;\\n _balances[account] += amount;\\n emit Transfer(address(0), account, amount);\\n\\n _afterTokenTransfer(address(0), account, amount);\\n }\\n\\n /**\\n * @dev Destroys `amount` tokens from `account`, reducing the\\n * total supply.\\n *\\n * Emits a {Transfer} event with `to` set to the zero address.\\n *\\n * Requirements:\\n *\\n * - `account` cannot be the zero address.\\n * - `account` must have at least `amount` tokens.\\n */\\n function _burn(address account, uint256 amount) internal virtual {\\n require(account != address(0), \\\"ERC20: burn from the zero address\\\");\\n\\n _beforeTokenTransfer(account, address(0), amount);\\n\\n uint256 accountBalance = _balances[account];\\n require(accountBalance >= amount, \\\"ERC20: burn amount exceeds balance\\\");\\n unchecked {\\n _balances[account] = accountBalance - amount;\\n }\\n _totalSupply -= amount;\\n\\n emit Transfer(account, address(0), amount);\\n\\n _afterTokenTransfer(account, address(0), amount);\\n }\\n\\n /**\\n * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.\\n *\\n * This internal function is equivalent to `approve`, and can be used to\\n * e.g. set automatic allowances for certain subsystems, etc.\\n *\\n * Emits an {Approval} event.\\n *\\n * Requirements:\\n *\\n * - `owner` cannot be the zero address.\\n * - `spender` cannot be the zero address.\\n */\\n function _approve(\\n address owner,\\n address spender,\\n uint256 amount\\n ) internal virtual {\\n require(owner != address(0), \\\"ERC20: approve from the zero address\\\");\\n require(spender != address(0), \\\"ERC20: approve to the zero address\\\");\\n\\n _allowances[owner][spender] = amount;\\n emit Approval(owner, spender, amount);\\n }\\n\\n /**\\n * @dev Spend `amount` form the allowance of `owner` toward `spender`.\\n *\\n * Does not update the allowance amount in case of infinite allowance.\\n * Revert if not enough allowance is available.\\n *\\n * Might emit an {Approval} event.\\n */\\n function _spendAllowance(\\n address owner,\\n address spender,\\n uint256 amount\\n ) internal virtual {\\n uint256 currentAllowance = allowance(owner, spender);\\n if (currentAllowance != type(uint256).max) {\\n require(currentAllowance >= amount, \\\"ERC20: insufficient allowance\\\");\\n unchecked {\\n _approve(owner, spender, currentAllowance - amount);\\n }\\n }\\n }\\n\\n /**\\n * @dev Hook that is called before any transfer of tokens. This includes\\n * minting and burning.\\n *\\n * Calling conditions:\\n *\\n * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens\\n * will be 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 *\\n * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].\\n */\\n function _beforeTokenTransfer(\\n address from,\\n address to,\\n uint256 amount\\n ) internal virtual {}\\n\\n /**\\n * @dev Hook that is called after any transfer of tokens. This includes\\n * minting and burning.\\n *\\n * Calling conditions:\\n *\\n * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens\\n * has been transferred to `to`.\\n * - when `from` is zero, `amount` tokens have been minted for `to`.\\n * - when `to` is zero, `amount` of ``from``'s tokens have been burned.\\n * - `from` and `to` are never both zero.\\n *\\n * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].\\n */\\n function _afterTokenTransfer(\\n address from,\\n address to,\\n uint256 amount\\n ) internal virtual {}\\n}\\n\",\"keccak256\":\"0xdadd41acb749920eccf40aeaa8d291adf9751399a7343561bad13e7a8d99be0b\",\"license\":\"MIT\"},\"@openzeppelin/contracts/token/ERC20/IERC20.sol\":{\"content\":\"// SPDX-License-Identifier: MIT\\n// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC20/IERC20.sol)\\n\\npragma solidity ^0.8.0;\\n\\n/**\\n * @dev Interface of the ERC20 standard as defined in the EIP.\\n */\\ninterface IERC20 {\\n /**\\n * @dev Returns the amount of tokens in existence.\\n */\\n function totalSupply() external view returns (uint256);\\n\\n /**\\n * @dev Returns the amount of tokens owned by `account`.\\n */\\n function balanceOf(address account) external view returns (uint256);\\n\\n /**\\n * @dev Moves `amount` tokens from the caller's account to `to`.\\n *\\n * Returns a boolean value indicating whether the operation succeeded.\\n *\\n * Emits a {Transfer} event.\\n */\\n function transfer(address to, uint256 amount) external returns (bool);\\n\\n /**\\n * @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 *\\n * This value changes when {approve} or {transferFrom} are called.\\n */\\n function allowance(address owner, address spender) external view returns (uint256);\\n\\n /**\\n * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.\\n *\\n * Returns a boolean value indicating whether the operation succeeded.\\n *\\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 *\\n * Emits an {Approval} event.\\n */\\n function approve(address spender, uint256 amount) external returns (bool);\\n\\n /**\\n * @dev Moves `amount` tokens from `from` to `to` using the\\n * allowance mechanism. `amount` is then deducted from the caller's\\n * allowance.\\n *\\n * Returns a boolean value indicating whether the operation succeeded.\\n *\\n * Emits a {Transfer} event.\\n */\\n function transferFrom(\\n address from,\\n address to,\\n uint256 amount\\n ) external returns (bool);\\n\\n /**\\n * @dev Emitted when `value` tokens are moved from one account (`from`) to\\n * another (`to`).\\n *\\n * Note that `value` may be zero.\\n */\\n event Transfer(address indexed from, address indexed to, uint256 value);\\n\\n /**\\n * @dev Emitted when the allowance of a `spender` for an `owner` is set by\\n * a call to {approve}. `value` is the new allowance.\\n */\\n event Approval(address indexed owner, address indexed spender, uint256 value);\\n}\\n\",\"keccak256\":\"0xbbc8ac883ac3c0078ce5ad3e288fbb3ffcc8a30c3a98c0fda0114d64fc44fca2\",\"license\":\"MIT\"},\"@openzeppelin/contracts/token/ERC20/extensions/ERC20Burnable.sol\":{\"content\":\"// SPDX-License-Identifier: MIT\\n// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC20/extensions/ERC20Burnable.sol)\\n\\npragma solidity ^0.8.0;\\n\\nimport \\\"../ERC20.sol\\\";\\nimport \\\"../../../utils/Context.sol\\\";\\n\\n/**\\n * @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).\\n */\\nabstract contract ERC20Burnable is Context, ERC20 {\\n /**\\n * @dev Destroys `amount` tokens from the caller.\\n *\\n * See {ERC20-_burn}.\\n */\\n function burn(uint256 amount) public virtual {\\n _burn(_msgSender(), amount);\\n }\\n\\n /**\\n * @dev Destroys `amount` tokens from `account`, deducting from the caller's\\n * allowance.\\n *\\n * See {ERC20-_burn} and {ERC20-allowance}.\\n *\\n * Requirements:\\n *\\n * - the caller must have allowance for ``accounts``'s tokens of at least\\n * `amount`.\\n */\\n function burnFrom(address account, uint256 amount) public virtual {\\n _spendAllowance(account, _msgSender(), amount);\\n _burn(account, amount);\\n }\\n}\\n\",\"keccak256\":\"0x0d19410453cda55960a818e02bd7c18952a5c8fe7a3036e81f0d599f34487a7b\",\"license\":\"MIT\"},\"@openzeppelin/contracts/token/ERC20/extensions/ERC20Votes.sol\":{\"content\":\"// SPDX-License-Identifier: MIT\\n// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC20/extensions/ERC20Votes.sol)\\n\\npragma solidity ^0.8.0;\\n\\nimport \\\"./draft-ERC20Permit.sol\\\";\\nimport \\\"../../../utils/math/Math.sol\\\";\\nimport \\\"../../../governance/utils/IVotes.sol\\\";\\nimport \\\"../../../utils/math/SafeCast.sol\\\";\\nimport \\\"../../../utils/cryptography/ECDSA.sol\\\";\\n\\n/**\\n * @dev Extension of ERC20 to support Compound-like voting and delegation. This version is more generic than Compound's,\\n * and supports token supply up to 2^224^ - 1, while COMP is limited to 2^96^ - 1.\\n *\\n * NOTE: If exact COMP compatibility is required, use the {ERC20VotesComp} variant of this module.\\n *\\n * This extension keeps a history (checkpoints) of each account's vote power. Vote power can be delegated either\\n * by calling the {delegate} function directly, or by providing a signature to be used with {delegateBySig}. Voting\\n * power can be queried through the public accessors {getVotes} and {getPastVotes}.\\n *\\n * By default, token balance does not account for voting power. This makes transfers cheaper. The downside is that it\\n * requires users to delegate to themselves in order to activate checkpoints and have their voting power tracked.\\n *\\n * _Available since v4.2._\\n */\\nabstract contract ERC20Votes is IVotes, ERC20Permit {\\n struct Checkpoint {\\n uint32 fromBlock;\\n uint224 votes;\\n }\\n\\n bytes32 private constant _DELEGATION_TYPEHASH =\\n keccak256(\\\"Delegation(address delegatee,uint256 nonce,uint256 expiry)\\\");\\n\\n mapping(address => address) private _delegates;\\n mapping(address => Checkpoint[]) private _checkpoints;\\n Checkpoint[] private _totalSupplyCheckpoints;\\n\\n /**\\n * @dev Get the `pos`-th checkpoint for `account`.\\n */\\n function checkpoints(address account, uint32 pos) public view virtual returns (Checkpoint memory) {\\n return _checkpoints[account][pos];\\n }\\n\\n /**\\n * @dev Get number of checkpoints for `account`.\\n */\\n function numCheckpoints(address account) public view virtual returns (uint32) {\\n return SafeCast.toUint32(_checkpoints[account].length);\\n }\\n\\n /**\\n * @dev Get the address `account` is currently delegating to.\\n */\\n function delegates(address account) public view virtual override returns (address) {\\n return _delegates[account];\\n }\\n\\n /**\\n * @dev Gets the current votes balance for `account`\\n */\\n function getVotes(address account) public view virtual override returns (uint256) {\\n uint256 pos = _checkpoints[account].length;\\n return pos == 0 ? 0 : _checkpoints[account][pos - 1].votes;\\n }\\n\\n /**\\n * @dev Retrieve the number of votes for `account` at the end of `blockNumber`.\\n *\\n * Requirements:\\n *\\n * - `blockNumber` must have been already mined\\n */\\n function getPastVotes(address account, uint256 blockNumber) public view virtual override returns (uint256) {\\n require(blockNumber < block.number, \\\"ERC20Votes: block not yet mined\\\");\\n return _checkpointsLookup(_checkpoints[account], blockNumber);\\n }\\n\\n /**\\n * @dev Retrieve the `totalSupply` at the end of `blockNumber`. Note, this value is the sum of all balances.\\n * It is but NOT the sum of all the delegated votes!\\n *\\n * Requirements:\\n *\\n * - `blockNumber` must have been already mined\\n */\\n function getPastTotalSupply(uint256 blockNumber) public view virtual override returns (uint256) {\\n require(blockNumber < block.number, \\\"ERC20Votes: block not yet mined\\\");\\n return _checkpointsLookup(_totalSupplyCheckpoints, blockNumber);\\n }\\n\\n /**\\n * @dev Lookup a value in a list of (sorted) checkpoints.\\n */\\n function _checkpointsLookup(Checkpoint[] storage ckpts, uint256 blockNumber) private view returns (uint256) {\\n // We run a binary search to look for the earliest checkpoint taken after `blockNumber`.\\n //\\n // During the loop, the index of the wanted checkpoint remains in the range [low-1, high).\\n // With each iteration, either `low` or `high` is moved towards the middle of the range to maintain the invariant.\\n // - If the middle checkpoint is after `blockNumber`, we look in [low, mid)\\n // - If the middle checkpoint is before or equal to `blockNumber`, we look in [mid+1, high)\\n // Once we reach a single value (when low == high), we've found the right checkpoint at the index high-1, if not\\n // out of bounds (in which case we're looking too far in the past and the result is 0).\\n // Note that if the latest checkpoint available is exactly for `blockNumber`, we end up with an index that is\\n // past the end of the array, so we technically don't find a checkpoint after `blockNumber`, but it works out\\n // the same.\\n uint256 high = ckpts.length;\\n uint256 low = 0;\\n while (low < high) {\\n uint256 mid = Math.average(low, high);\\n if (ckpts[mid].fromBlock > blockNumber) {\\n high = mid;\\n } else {\\n low = mid + 1;\\n }\\n }\\n\\n return high == 0 ? 0 : ckpts[high - 1].votes;\\n }\\n\\n /**\\n * @dev Delegate votes from the sender to `delegatee`.\\n */\\n function delegate(address delegatee) public virtual override {\\n _delegate(_msgSender(), delegatee);\\n }\\n\\n /**\\n * @dev Delegates votes from signer to `delegatee`\\n */\\n function delegateBySig(\\n address delegatee,\\n uint256 nonce,\\n uint256 expiry,\\n uint8 v,\\n bytes32 r,\\n bytes32 s\\n ) public virtual override {\\n require(block.timestamp <= expiry, \\\"ERC20Votes: signature expired\\\");\\n address signer = ECDSA.recover(\\n _hashTypedDataV4(keccak256(abi.encode(_DELEGATION_TYPEHASH, delegatee, nonce, expiry))),\\n v,\\n r,\\n s\\n );\\n require(nonce == _useNonce(signer), \\\"ERC20Votes: invalid nonce\\\");\\n _delegate(signer, delegatee);\\n }\\n\\n /**\\n * @dev Maximum token supply. Defaults to `type(uint224).max` (2^224^ - 1).\\n */\\n function _maxSupply() internal view virtual returns (uint224) {\\n return type(uint224).max;\\n }\\n\\n /**\\n * @dev Snapshots the totalSupply after it has been increased.\\n */\\n function _mint(address account, uint256 amount) internal virtual override {\\n super._mint(account, amount);\\n require(totalSupply() <= _maxSupply(), \\\"ERC20Votes: total supply risks overflowing votes\\\");\\n\\n _writeCheckpoint(_totalSupplyCheckpoints, _add, amount);\\n }\\n\\n /**\\n * @dev Snapshots the totalSupply after it has been decreased.\\n */\\n function _burn(address account, uint256 amount) internal virtual override {\\n super._burn(account, amount);\\n\\n _writeCheckpoint(_totalSupplyCheckpoints, _subtract, amount);\\n }\\n\\n /**\\n * @dev Move voting power when tokens are transferred.\\n *\\n * Emits a {DelegateVotesChanged} event.\\n */\\n function _afterTokenTransfer(\\n address from,\\n address to,\\n uint256 amount\\n ) internal virtual override {\\n super._afterTokenTransfer(from, to, amount);\\n\\n _moveVotingPower(delegates(from), delegates(to), amount);\\n }\\n\\n /**\\n * @dev Change delegation for `delegator` to `delegatee`.\\n *\\n * Emits events {DelegateChanged} and {DelegateVotesChanged}.\\n */\\n function _delegate(address delegator, address delegatee) internal virtual {\\n address currentDelegate = delegates(delegator);\\n uint256 delegatorBalance = balanceOf(delegator);\\n _delegates[delegator] = delegatee;\\n\\n emit DelegateChanged(delegator, currentDelegate, delegatee);\\n\\n _moveVotingPower(currentDelegate, delegatee, delegatorBalance);\\n }\\n\\n function _moveVotingPower(\\n address src,\\n address dst,\\n uint256 amount\\n ) private {\\n if (src != dst && amount > 0) {\\n if (src != address(0)) {\\n (uint256 oldWeight, uint256 newWeight) = _writeCheckpoint(_checkpoints[src], _subtract, amount);\\n emit DelegateVotesChanged(src, oldWeight, newWeight);\\n }\\n\\n if (dst != address(0)) {\\n (uint256 oldWeight, uint256 newWeight) = _writeCheckpoint(_checkpoints[dst], _add, amount);\\n emit DelegateVotesChanged(dst, oldWeight, newWeight);\\n }\\n }\\n }\\n\\n function _writeCheckpoint(\\n Checkpoint[] storage ckpts,\\n function(uint256, uint256) view returns (uint256) op,\\n uint256 delta\\n ) private returns (uint256 oldWeight, uint256 newWeight) {\\n uint256 pos = ckpts.length;\\n oldWeight = pos == 0 ? 0 : ckpts[pos - 1].votes;\\n newWeight = op(oldWeight, delta);\\n\\n if (pos > 0 && ckpts[pos - 1].fromBlock == block.number) {\\n ckpts[pos - 1].votes = SafeCast.toUint224(newWeight);\\n } else {\\n ckpts.push(Checkpoint({fromBlock: SafeCast.toUint32(block.number), votes: SafeCast.toUint224(newWeight)}));\\n }\\n }\\n\\n function _add(uint256 a, uint256 b) private pure returns (uint256) {\\n return a + b;\\n }\\n\\n function _subtract(uint256 a, uint256 b) private pure returns (uint256) {\\n return a - b;\\n }\\n}\\n\",\"keccak256\":\"0x7fd2492be0468be4662081ee25cde38a31e4a0ceca0fed10160462389013910f\",\"license\":\"MIT\"},\"@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol\":{\"content\":\"// SPDX-License-Identifier: MIT\\n// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)\\n\\npragma solidity ^0.8.0;\\n\\nimport \\\"../IERC20.sol\\\";\\n\\n/**\\n * @dev Interface for the optional metadata functions from the ERC20 standard.\\n *\\n * _Available since v4.1._\\n */\\ninterface IERC20Metadata is IERC20 {\\n /**\\n * @dev Returns the name of the token.\\n */\\n function name() external view returns (string memory);\\n\\n /**\\n * @dev Returns the symbol of the token.\\n */\\n function symbol() external view returns (string memory);\\n\\n /**\\n * @dev Returns the decimals places of the token.\\n */\\n function decimals() external view returns (uint8);\\n}\\n\",\"keccak256\":\"0x8de418a5503946cabe331f35fe242d3201a73f67f77aaeb7110acb1f30423aca\",\"license\":\"MIT\"},\"@openzeppelin/contracts/token/ERC20/extensions/draft-ERC20Permit.sol\":{\"content\":\"// SPDX-License-Identifier: MIT\\n// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/draft-ERC20Permit.sol)\\n\\npragma solidity ^0.8.0;\\n\\nimport \\\"./draft-IERC20Permit.sol\\\";\\nimport \\\"../ERC20.sol\\\";\\nimport \\\"../../../utils/cryptography/draft-EIP712.sol\\\";\\nimport \\\"../../../utils/cryptography/ECDSA.sol\\\";\\nimport \\\"../../../utils/Counters.sol\\\";\\n\\n/**\\n * @dev Implementation of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in\\n * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].\\n *\\n * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by\\n * presenting a message signed by the account. By not relying on `{IERC20-approve}`, the token holder account doesn't\\n * need to send a transaction, and thus is not required to hold Ether at all.\\n *\\n * _Available since v3.4._\\n */\\nabstract contract ERC20Permit is ERC20, IERC20Permit, EIP712 {\\n using Counters for Counters.Counter;\\n\\n mapping(address => Counters.Counter) private _nonces;\\n\\n // solhint-disable-next-line var-name-mixedcase\\n bytes32 private immutable _PERMIT_TYPEHASH =\\n keccak256(\\\"Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)\\\");\\n\\n /**\\n * @dev Initializes the {EIP712} domain separator using the `name` parameter, and setting `version` to `\\\"1\\\"`.\\n *\\n * It's a good idea to use the same `name` that is defined as the ERC20 token name.\\n */\\n constructor(string memory name) EIP712(name, \\\"1\\\") {}\\n\\n /**\\n * @dev See {IERC20Permit-permit}.\\n */\\n function permit(\\n address owner,\\n address spender,\\n uint256 value,\\n uint256 deadline,\\n uint8 v,\\n bytes32 r,\\n bytes32 s\\n ) public virtual override {\\n require(block.timestamp <= deadline, \\\"ERC20Permit: expired deadline\\\");\\n\\n bytes32 structHash = keccak256(abi.encode(_PERMIT_TYPEHASH, owner, spender, value, _useNonce(owner), deadline));\\n\\n bytes32 hash = _hashTypedDataV4(structHash);\\n\\n address signer = ECDSA.recover(hash, v, r, s);\\n require(signer == owner, \\\"ERC20Permit: invalid signature\\\");\\n\\n _approve(owner, spender, value);\\n }\\n\\n /**\\n * @dev See {IERC20Permit-nonces}.\\n */\\n function nonces(address owner) public view virtual override returns (uint256) {\\n return _nonces[owner].current();\\n }\\n\\n /**\\n * @dev See {IERC20Permit-DOMAIN_SEPARATOR}.\\n */\\n // solhint-disable-next-line func-name-mixedcase\\n function DOMAIN_SEPARATOR() external view override returns (bytes32) {\\n return _domainSeparatorV4();\\n }\\n\\n /**\\n * @dev \\\"Consume a nonce\\\": return the current value and increment.\\n *\\n * _Available since v4.1._\\n */\\n function _useNonce(address owner) internal virtual returns (uint256 current) {\\n Counters.Counter storage nonce = _nonces[owner];\\n current = nonce.current();\\n nonce.increment();\\n }\\n}\\n\",\"keccak256\":\"0x8a763ef5625e97f5287c7ddd5ede434129069e15d83bf0a68ad10a5e56ccb439\",\"license\":\"MIT\"},\"@openzeppelin/contracts/token/ERC20/extensions/draft-IERC20Permit.sol\":{\"content\":\"// SPDX-License-Identifier: MIT\\n// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/draft-IERC20Permit.sol)\\n\\npragma solidity ^0.8.0;\\n\\n/**\\n * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in\\n * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].\\n *\\n * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by\\n * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't\\n * need to send a transaction, and thus is not required to hold Ether at all.\\n */\\ninterface IERC20Permit {\\n /**\\n * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,\\n * given ``owner``'s signed approval.\\n *\\n * IMPORTANT: The same issues {IERC20-approve} has related to transaction\\n * ordering also apply here.\\n *\\n * Emits an {Approval} event.\\n *\\n * Requirements:\\n *\\n * - `spender` cannot be the zero address.\\n * - `deadline` must be a timestamp in the future.\\n * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`\\n * over the EIP712-formatted function arguments.\\n * - the signature must use ``owner``'s current nonce (see {nonces}).\\n *\\n * For more information on the signature format, see the\\n * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP\\n * section].\\n */\\n function permit(\\n address owner,\\n address spender,\\n uint256 value,\\n uint256 deadline,\\n uint8 v,\\n bytes32 r,\\n bytes32 s\\n ) external;\\n\\n /**\\n * @dev Returns the current nonce for `owner`. This value must be\\n * included whenever a signature is generated for {permit}.\\n *\\n * Every successful call to {permit} increases ``owner``'s nonce by one. This\\n * prevents a signature from being used multiple times.\\n */\\n function nonces(address owner) external view returns (uint256);\\n\\n /**\\n * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.\\n */\\n // solhint-disable-next-line func-name-mixedcase\\n function DOMAIN_SEPARATOR() external view returns (bytes32);\\n}\\n\",\"keccak256\":\"0xf41ca991f30855bf80ffd11e9347856a517b977f0a6c2d52e6421a99b7840329\",\"license\":\"MIT\"},\"@openzeppelin/contracts/utils/Context.sol\":{\"content\":\"// SPDX-License-Identifier: MIT\\n// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)\\n\\npragma solidity ^0.8.0;\\n\\n/**\\n * @dev Provides information about the current execution context, including the\\n * sender of the transaction and its data. While these are generally available\\n * via msg.sender and msg.data, they should not be accessed in such a direct\\n * manner, since when dealing with meta-transactions the account sending and\\n * paying for execution may not be the actual sender (as far as an application\\n * is concerned).\\n *\\n * This contract is only required for intermediate, library-like contracts.\\n */\\nabstract contract Context {\\n function _msgSender() internal view virtual returns (address) {\\n return msg.sender;\\n }\\n\\n function _msgData() internal view virtual returns (bytes calldata) {\\n return msg.data;\\n }\\n}\\n\",\"keccak256\":\"0xe2e337e6dde9ef6b680e07338c493ebea1b5fd09b43424112868e9cc1706bca7\",\"license\":\"MIT\"},\"@openzeppelin/contracts/utils/Counters.sol\":{\"content\":\"// SPDX-License-Identifier: MIT\\n// OpenZeppelin Contracts v4.4.1 (utils/Counters.sol)\\n\\npragma solidity ^0.8.0;\\n\\n/**\\n * @title Counters\\n * @author Matt Condon (@shrugs)\\n * @dev Provides counters that can only be incremented, decremented or reset. This can be used e.g. to track the number\\n * of elements in a mapping, issuing ERC721 ids, or counting request ids.\\n *\\n * Include with `using Counters for Counters.Counter;`\\n */\\nlibrary Counters {\\n struct Counter {\\n // This variable should never be directly accessed by users of the library: interactions must be restricted to\\n // the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add\\n // this feature: see https://github.com/ethereum/solidity/issues/4637\\n uint256 _value; // default: 0\\n }\\n\\n function current(Counter storage counter) internal view returns (uint256) {\\n return counter._value;\\n }\\n\\n function increment(Counter storage counter) internal {\\n unchecked {\\n counter._value += 1;\\n }\\n }\\n\\n function decrement(Counter storage counter) internal {\\n uint256 value = counter._value;\\n require(value > 0, \\\"Counter: decrement overflow\\\");\\n unchecked {\\n counter._value = value - 1;\\n }\\n }\\n\\n function reset(Counter storage counter) internal {\\n counter._value = 0;\\n }\\n}\\n\",\"keccak256\":\"0xf0018c2440fbe238dd3a8732fa8e17a0f9dce84d31451dc8a32f6d62b349c9f1\",\"license\":\"MIT\"},\"@openzeppelin/contracts/utils/Strings.sol\":{\"content\":\"// SPDX-License-Identifier: MIT\\n// OpenZeppelin Contracts v4.4.1 (utils/Strings.sol)\\n\\npragma solidity ^0.8.0;\\n\\n/**\\n * @dev String operations.\\n */\\nlibrary Strings {\\n bytes16 private constant _HEX_SYMBOLS = \\\"0123456789abcdef\\\";\\n\\n /**\\n * @dev Converts a `uint256` to its ASCII `string` decimal representation.\\n */\\n function toString(uint256 value) internal pure returns (string memory) {\\n // Inspired by OraclizeAPI's implementation - MIT licence\\n // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol\\n\\n if (value == 0) {\\n return \\\"0\\\";\\n }\\n uint256 temp = value;\\n uint256 digits;\\n while (temp != 0) {\\n digits++;\\n temp /= 10;\\n }\\n bytes memory buffer = new bytes(digits);\\n while (value != 0) {\\n digits -= 1;\\n buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));\\n value /= 10;\\n }\\n return string(buffer);\\n }\\n\\n /**\\n * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.\\n */\\n function toHexString(uint256 value) internal pure returns (string memory) {\\n if (value == 0) {\\n return \\\"0x00\\\";\\n }\\n uint256 temp = value;\\n uint256 length = 0;\\n while (temp != 0) {\\n length++;\\n temp >>= 8;\\n }\\n return toHexString(value, length);\\n }\\n\\n /**\\n * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.\\n */\\n function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {\\n bytes memory buffer = new bytes(2 * length + 2);\\n buffer[0] = \\\"0\\\";\\n buffer[1] = \\\"x\\\";\\n for (uint256 i = 2 * length + 1; i > 1; --i) {\\n buffer[i] = _HEX_SYMBOLS[value & 0xf];\\n value >>= 4;\\n }\\n require(value == 0, \\\"Strings: hex length insufficient\\\");\\n return string(buffer);\\n }\\n}\\n\",\"keccak256\":\"0x32c202bd28995dd20c4347b7c6467a6d3241c74c8ad3edcbb610cd9205916c45\",\"license\":\"MIT\"},\"@openzeppelin/contracts/utils/cryptography/ECDSA.sol\":{\"content\":\"// SPDX-License-Identifier: MIT\\n// OpenZeppelin Contracts (last updated v4.5.0) (utils/cryptography/ECDSA.sol)\\n\\npragma solidity ^0.8.0;\\n\\nimport \\\"../Strings.sol\\\";\\n\\n/**\\n * @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.\\n *\\n * These functions can be used to verify that a message was signed by the holder\\n * of the private keys of a given address.\\n */\\nlibrary ECDSA {\\n enum RecoverError {\\n NoError,\\n InvalidSignature,\\n InvalidSignatureLength,\\n InvalidSignatureS,\\n InvalidSignatureV\\n }\\n\\n function _throwError(RecoverError error) private pure {\\n if (error == RecoverError.NoError) {\\n return; // no error: do nothing\\n } else if (error == RecoverError.InvalidSignature) {\\n revert(\\\"ECDSA: invalid signature\\\");\\n } else if (error == RecoverError.InvalidSignatureLength) {\\n revert(\\\"ECDSA: invalid signature length\\\");\\n } else if (error == RecoverError.InvalidSignatureS) {\\n revert(\\\"ECDSA: invalid signature 's' value\\\");\\n } else if (error == RecoverError.InvalidSignatureV) {\\n revert(\\\"ECDSA: invalid signature 'v' value\\\");\\n }\\n }\\n\\n /**\\n * @dev Returns the address that signed a hashed message (`hash`) with\\n * `signature` or error string. This address can then be used for verification purposes.\\n *\\n * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:\\n * this function rejects them by requiring the `s` value to be in the lower\\n * half order, and the `v` value to be either 27 or 28.\\n *\\n * IMPORTANT: `hash` _must_ be the result of a hash operation for the\\n * verification to be secure: it is possible to craft signatures that\\n * recover to arbitrary addresses for non-hashed data. A safe way to ensure\\n * this is by receiving a hash of the original message (which may otherwise\\n * be too long), and then calling {toEthSignedMessageHash} on it.\\n *\\n * Documentation for signature generation:\\n * - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]\\n * - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]\\n *\\n * _Available since v4.3._\\n */\\n function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) {\\n // Check the signature length\\n // - case 65: r,s,v signature (standard)\\n // - case 64: r,vs signature (cf https://eips.ethereum.org/EIPS/eip-2098) _Available since v4.1._\\n if (signature.length == 65) {\\n bytes32 r;\\n bytes32 s;\\n uint8 v;\\n // ecrecover takes the signature parameters, and the only way to get them\\n // currently is to use assembly.\\n assembly {\\n r := mload(add(signature, 0x20))\\n s := mload(add(signature, 0x40))\\n v := byte(0, mload(add(signature, 0x60)))\\n }\\n return tryRecover(hash, v, r, s);\\n } else if (signature.length == 64) {\\n bytes32 r;\\n bytes32 vs;\\n // ecrecover takes the signature parameters, and the only way to get them\\n // currently is to use assembly.\\n assembly {\\n r := mload(add(signature, 0x20))\\n vs := mload(add(signature, 0x40))\\n }\\n return tryRecover(hash, r, vs);\\n } else {\\n return (address(0), RecoverError.InvalidSignatureLength);\\n }\\n }\\n\\n /**\\n * @dev Returns the address that signed a hashed message (`hash`) with\\n * `signature`. This address can then be used for verification purposes.\\n *\\n * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:\\n * this function rejects them by requiring the `s` value to be in the lower\\n * half order, and the `v` value to be either 27 or 28.\\n *\\n * IMPORTANT: `hash` _must_ be the result of a hash operation for the\\n * verification to be secure: it is possible to craft signatures that\\n * recover to arbitrary addresses for non-hashed data. A safe way to ensure\\n * this is by receiving a hash of the original message (which may otherwise\\n * be too long), and then calling {toEthSignedMessageHash} on it.\\n */\\n function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {\\n (address recovered, RecoverError error) = tryRecover(hash, signature);\\n _throwError(error);\\n return recovered;\\n }\\n\\n /**\\n * @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately.\\n *\\n * See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]\\n *\\n * _Available since v4.3._\\n */\\n function tryRecover(\\n bytes32 hash,\\n bytes32 r,\\n bytes32 vs\\n ) internal pure returns (address, RecoverError) {\\n bytes32 s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff);\\n uint8 v = uint8((uint256(vs) >> 255) + 27);\\n return tryRecover(hash, v, r, s);\\n }\\n\\n /**\\n * @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately.\\n *\\n * _Available since v4.2._\\n */\\n function recover(\\n bytes32 hash,\\n bytes32 r,\\n bytes32 vs\\n ) internal pure returns (address) {\\n (address recovered, RecoverError error) = tryRecover(hash, r, vs);\\n _throwError(error);\\n return recovered;\\n }\\n\\n /**\\n * @dev Overload of {ECDSA-tryRecover} that receives the `v`,\\n * `r` and `s` signature fields separately.\\n *\\n * _Available since v4.3._\\n */\\n function tryRecover(\\n bytes32 hash,\\n uint8 v,\\n bytes32 r,\\n bytes32 s\\n ) internal pure returns (address, RecoverError) {\\n // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature\\n // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines\\n // the valid range for s in (301): 0 < s < secp256k1n \\u00f7 2 + 1, and for v in (302): v \\u2208 {27, 28}. Most\\n // signatures from current libraries generate a unique signature with an s-value in the lower half order.\\n //\\n // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value\\n // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or\\n // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept\\n // these malleable signatures as well.\\n if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {\\n return (address(0), RecoverError.InvalidSignatureS);\\n }\\n if (v != 27 && v != 28) {\\n return (address(0), RecoverError.InvalidSignatureV);\\n }\\n\\n // If the signature is valid (and not malleable), return the signer address\\n address signer = ecrecover(hash, v, r, s);\\n if (signer == address(0)) {\\n return (address(0), RecoverError.InvalidSignature);\\n }\\n\\n return (signer, RecoverError.NoError);\\n }\\n\\n /**\\n * @dev Overload of {ECDSA-recover} that receives the `v`,\\n * `r` and `s` signature fields separately.\\n */\\n function recover(\\n bytes32 hash,\\n uint8 v,\\n bytes32 r,\\n bytes32 s\\n ) internal pure returns (address) {\\n (address recovered, RecoverError error) = tryRecover(hash, v, r, s);\\n _throwError(error);\\n return recovered;\\n }\\n\\n /**\\n * @dev Returns an Ethereum Signed Message, created from a `hash`. This\\n * produces hash corresponding to the one signed with the\\n * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]\\n * JSON-RPC method as part of EIP-191.\\n *\\n * See {recover}.\\n */\\n function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) {\\n // 32 is the length in bytes of hash,\\n // enforced by the type signature above\\n return keccak256(abi.encodePacked(\\\"\\\\x19Ethereum Signed Message:\\\\n32\\\", hash));\\n }\\n\\n /**\\n * @dev Returns an Ethereum Signed Message, created from `s`. This\\n * produces hash corresponding to the one signed with the\\n * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]\\n * JSON-RPC method as part of EIP-191.\\n *\\n * See {recover}.\\n */\\n function toEthSignedMessageHash(bytes memory s) internal pure returns (bytes32) {\\n return keccak256(abi.encodePacked(\\\"\\\\x19Ethereum Signed Message:\\\\n\\\", Strings.toString(s.length), s));\\n }\\n\\n /**\\n * @dev Returns an Ethereum Signed Typed Data, created from a\\n * `domainSeparator` and a `structHash`. This produces hash corresponding\\n * to the one signed with the\\n * https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`]\\n * JSON-RPC method as part of EIP-712.\\n *\\n * See {recover}.\\n */\\n function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) {\\n return keccak256(abi.encodePacked(\\\"\\\\x19\\\\x01\\\", domainSeparator, structHash));\\n }\\n}\\n\",\"keccak256\":\"0x3c07f43e60e099b3b157243b3152722e73b80eeb7985c2cd73712828d7f7da29\",\"license\":\"MIT\"},\"@openzeppelin/contracts/utils/cryptography/draft-EIP712.sol\":{\"content\":\"// SPDX-License-Identifier: MIT\\n// OpenZeppelin Contracts v4.4.1 (utils/cryptography/draft-EIP712.sol)\\n\\npragma solidity ^0.8.0;\\n\\nimport \\\"./ECDSA.sol\\\";\\n\\n/**\\n * @dev https://eips.ethereum.org/EIPS/eip-712[EIP 712] is a standard for hashing and signing of typed structured data.\\n *\\n * The encoding specified in the EIP is very generic, and such a generic implementation in Solidity is not feasible,\\n * thus this contract does not implement the encoding itself. Protocols need to implement the type-specific encoding\\n * they need in their contracts using a combination of `abi.encode` and `keccak256`.\\n *\\n * This contract implements the EIP 712 domain separator ({_domainSeparatorV4}) that is used as part of the encoding\\n * scheme, and the final step of the encoding to obtain the message digest that is then signed via ECDSA\\n * ({_hashTypedDataV4}).\\n *\\n * The implementation of the domain separator was designed to be as efficient as possible while still properly updating\\n * the chain id to protect against replay attacks on an eventual fork of the chain.\\n *\\n * NOTE: This contract implements the version of the encoding known as \\\"v4\\\", as implemented by the JSON RPC method\\n * https://docs.metamask.io/guide/signing-data.html[`eth_signTypedDataV4` in MetaMask].\\n *\\n * _Available since v3.4._\\n */\\nabstract contract EIP712 {\\n /* solhint-disable var-name-mixedcase */\\n // Cache the domain separator as an immutable value, but also store the chain id that it corresponds to, in order to\\n // invalidate the cached domain separator if the chain id changes.\\n bytes32 private immutable _CACHED_DOMAIN_SEPARATOR;\\n uint256 private immutable _CACHED_CHAIN_ID;\\n address private immutable _CACHED_THIS;\\n\\n bytes32 private immutable _HASHED_NAME;\\n bytes32 private immutable _HASHED_VERSION;\\n bytes32 private immutable _TYPE_HASH;\\n\\n /* solhint-enable var-name-mixedcase */\\n\\n /**\\n * @dev Initializes the domain separator and parameter caches.\\n *\\n * The meaning of `name` and `version` is specified in\\n * https://eips.ethereum.org/EIPS/eip-712#definition-of-domainseparator[EIP 712]:\\n *\\n * - `name`: the user readable name of the signing domain, i.e. the name of the DApp or the protocol.\\n * - `version`: the current major version of the signing domain.\\n *\\n * NOTE: These parameters cannot be changed except through a xref:learn::upgrading-smart-contracts.adoc[smart\\n * contract upgrade].\\n */\\n constructor(string memory name, string memory version) {\\n bytes32 hashedName = keccak256(bytes(name));\\n bytes32 hashedVersion = keccak256(bytes(version));\\n bytes32 typeHash = keccak256(\\n \\\"EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)\\\"\\n );\\n _HASHED_NAME = hashedName;\\n _HASHED_VERSION = hashedVersion;\\n _CACHED_CHAIN_ID = block.chainid;\\n _CACHED_DOMAIN_SEPARATOR = _buildDomainSeparator(typeHash, hashedName, hashedVersion);\\n _CACHED_THIS = address(this);\\n _TYPE_HASH = typeHash;\\n }\\n\\n /**\\n * @dev Returns the domain separator for the current chain.\\n */\\n function _domainSeparatorV4() internal view returns (bytes32) {\\n if (address(this) == _CACHED_THIS && block.chainid == _CACHED_CHAIN_ID) {\\n return _CACHED_DOMAIN_SEPARATOR;\\n } else {\\n return _buildDomainSeparator(_TYPE_HASH, _HASHED_NAME, _HASHED_VERSION);\\n }\\n }\\n\\n function _buildDomainSeparator(\\n bytes32 typeHash,\\n bytes32 nameHash,\\n bytes32 versionHash\\n ) private view returns (bytes32) {\\n return keccak256(abi.encode(typeHash, nameHash, versionHash, block.chainid, address(this)));\\n }\\n\\n /**\\n * @dev Given an already https://eips.ethereum.org/EIPS/eip-712#definition-of-hashstruct[hashed struct], this\\n * function returns the hash of the fully encoded EIP712 message for this domain.\\n *\\n * This hash can be used together with {ECDSA-recover} to obtain the signer of a message. For example:\\n *\\n * ```solidity\\n * bytes32 digest = _hashTypedDataV4(keccak256(abi.encode(\\n * keccak256(\\\"Mail(address to,string contents)\\\"),\\n * mailTo,\\n * keccak256(bytes(mailContents))\\n * )));\\n * address signer = ECDSA.recover(digest, signature);\\n * ```\\n */\\n function _hashTypedDataV4(bytes32 structHash) internal view virtual returns (bytes32) {\\n return ECDSA.toTypedDataHash(_domainSeparatorV4(), structHash);\\n }\\n}\\n\",\"keccak256\":\"0x6688fad58b9ec0286d40fa957152e575d5d8bd4c3aa80985efdb11b44f776ae7\",\"license\":\"MIT\"},\"@openzeppelin/contracts/utils/math/Math.sol\":{\"content\":\"// SPDX-License-Identifier: MIT\\n// OpenZeppelin Contracts (last updated v4.5.0) (utils/math/Math.sol)\\n\\npragma solidity ^0.8.0;\\n\\n/**\\n * @dev Standard math utilities missing in the Solidity language.\\n */\\nlibrary Math {\\n /**\\n * @dev Returns the largest of two numbers.\\n */\\n function max(uint256 a, uint256 b) internal pure returns (uint256) {\\n return a >= b ? a : b;\\n }\\n\\n /**\\n * @dev Returns the smallest of two numbers.\\n */\\n function min(uint256 a, uint256 b) internal pure returns (uint256) {\\n return a < b ? a : b;\\n }\\n\\n /**\\n * @dev Returns the average of two numbers. The result is rounded towards\\n * zero.\\n */\\n function average(uint256 a, uint256 b) internal pure returns (uint256) {\\n // (a + b) / 2 can overflow.\\n return (a & b) + (a ^ b) / 2;\\n }\\n\\n /**\\n * @dev Returns the ceiling of the division of two numbers.\\n *\\n * This differs from standard division with `/` in that it rounds up instead\\n * of rounding down.\\n */\\n function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {\\n // (a + b - 1) / b can overflow on addition, so we distribute.\\n return a / b + (a % b == 0 ? 0 : 1);\\n }\\n}\\n\",\"keccak256\":\"0xc995bddbca1ae19788db9f8b61e63385edd3fddf89693b612d5abd1a275974d2\",\"license\":\"MIT\"},\"@openzeppelin/contracts/utils/math/SafeCast.sol\":{\"content\":\"// SPDX-License-Identifier: MIT\\n// OpenZeppelin Contracts v4.4.1 (utils/math/SafeCast.sol)\\n\\npragma solidity ^0.8.0;\\n\\n/**\\n * @dev Wrappers over Solidity's uintXX/intXX casting operators with added overflow\\n * checks.\\n *\\n * Downcasting from uint256/int256 in Solidity does not revert on overflow. This can\\n * easily result in undesired exploitation or bugs, since developers usually\\n * assume that overflows raise errors. `SafeCast` restores this intuition by\\n * reverting the transaction when such an operation overflows.\\n *\\n * Using this library instead of the unchecked operations eliminates an entire\\n * class of bugs, so it's recommended to use it always.\\n *\\n * Can be combined with {SafeMath} and {SignedSafeMath} to extend it to smaller types, by performing\\n * all math on `uint256` and `int256` and then downcasting.\\n */\\nlibrary SafeCast {\\n /**\\n * @dev Returns the downcasted uint224 from uint256, reverting on\\n * overflow (when the input is greater than largest uint224).\\n *\\n * Counterpart to Solidity's `uint224` operator.\\n *\\n * Requirements:\\n *\\n * - input must fit into 224 bits\\n */\\n function toUint224(uint256 value) internal pure returns (uint224) {\\n require(value <= type(uint224).max, \\\"SafeCast: value doesn't fit in 224 bits\\\");\\n return uint224(value);\\n }\\n\\n /**\\n * @dev Returns the downcasted uint128 from uint256, reverting on\\n * overflow (when the input is greater than largest uint128).\\n *\\n * Counterpart to Solidity's `uint128` operator.\\n *\\n * Requirements:\\n *\\n * - input must fit into 128 bits\\n */\\n function toUint128(uint256 value) internal pure returns (uint128) {\\n require(value <= type(uint128).max, \\\"SafeCast: value doesn't fit in 128 bits\\\");\\n return uint128(value);\\n }\\n\\n /**\\n * @dev Returns the downcasted uint96 from uint256, reverting on\\n * overflow (when the input is greater than largest uint96).\\n *\\n * Counterpart to Solidity's `uint96` operator.\\n *\\n * Requirements:\\n *\\n * - input must fit into 96 bits\\n */\\n function toUint96(uint256 value) internal pure returns (uint96) {\\n require(value <= type(uint96).max, \\\"SafeCast: value doesn't fit in 96 bits\\\");\\n return uint96(value);\\n }\\n\\n /**\\n * @dev Returns the downcasted uint64 from uint256, reverting on\\n * overflow (when the input is greater than largest uint64).\\n *\\n * Counterpart to Solidity's `uint64` operator.\\n *\\n * Requirements:\\n *\\n * - input must fit into 64 bits\\n */\\n function toUint64(uint256 value) internal pure returns (uint64) {\\n require(value <= type(uint64).max, \\\"SafeCast: value doesn't fit in 64 bits\\\");\\n return uint64(value);\\n }\\n\\n /**\\n * @dev Returns the downcasted uint32 from uint256, reverting on\\n * overflow (when the input is greater than largest uint32).\\n *\\n * Counterpart to Solidity's `uint32` operator.\\n *\\n * Requirements:\\n *\\n * - input must fit into 32 bits\\n */\\n function toUint32(uint256 value) internal pure returns (uint32) {\\n require(value <= type(uint32).max, \\\"SafeCast: value doesn't fit in 32 bits\\\");\\n return uint32(value);\\n }\\n\\n /**\\n * @dev Returns the downcasted uint16 from uint256, reverting on\\n * overflow (when the input is greater than largest uint16).\\n *\\n * Counterpart to Solidity's `uint16` operator.\\n *\\n * Requirements:\\n *\\n * - input must fit into 16 bits\\n */\\n function toUint16(uint256 value) internal pure returns (uint16) {\\n require(value <= type(uint16).max, \\\"SafeCast: value doesn't fit in 16 bits\\\");\\n return uint16(value);\\n }\\n\\n /**\\n * @dev Returns the downcasted uint8 from uint256, reverting on\\n * overflow (when the input is greater than largest uint8).\\n *\\n * Counterpart to Solidity's `uint8` operator.\\n *\\n * Requirements:\\n *\\n * - input must fit into 8 bits.\\n */\\n function toUint8(uint256 value) internal pure returns (uint8) {\\n require(value <= type(uint8).max, \\\"SafeCast: value doesn't fit in 8 bits\\\");\\n return uint8(value);\\n }\\n\\n /**\\n * @dev Converts a signed int256 into an unsigned uint256.\\n *\\n * Requirements:\\n *\\n * - input must be greater than or equal to 0.\\n */\\n function toUint256(int256 value) internal pure returns (uint256) {\\n require(value >= 0, \\\"SafeCast: value must be positive\\\");\\n return uint256(value);\\n }\\n\\n /**\\n * @dev Returns the downcasted int128 from int256, reverting on\\n * overflow (when the input is less than smallest int128 or\\n * greater than largest int128).\\n *\\n * Counterpart to Solidity's `int128` operator.\\n *\\n * Requirements:\\n *\\n * - input must fit into 128 bits\\n *\\n * _Available since v3.1._\\n */\\n function toInt128(int256 value) internal pure returns (int128) {\\n require(value >= type(int128).min && value <= type(int128).max, \\\"SafeCast: value doesn't fit in 128 bits\\\");\\n return int128(value);\\n }\\n\\n /**\\n * @dev Returns the downcasted int64 from int256, reverting on\\n * overflow (when the input is less than smallest int64 or\\n * greater than largest int64).\\n *\\n * Counterpart to Solidity's `int64` operator.\\n *\\n * Requirements:\\n *\\n * - input must fit into 64 bits\\n *\\n * _Available since v3.1._\\n */\\n function toInt64(int256 value) internal pure returns (int64) {\\n require(value >= type(int64).min && value <= type(int64).max, \\\"SafeCast: value doesn't fit in 64 bits\\\");\\n return int64(value);\\n }\\n\\n /**\\n * @dev Returns the downcasted int32 from int256, reverting on\\n * overflow (when the input is less than smallest int32 or\\n * greater than largest int32).\\n *\\n * Counterpart to Solidity's `int32` operator.\\n *\\n * Requirements:\\n *\\n * - input must fit into 32 bits\\n *\\n * _Available since v3.1._\\n */\\n function toInt32(int256 value) internal pure returns (int32) {\\n require(value >= type(int32).min && value <= type(int32).max, \\\"SafeCast: value doesn't fit in 32 bits\\\");\\n return int32(value);\\n }\\n\\n /**\\n * @dev Returns the downcasted int16 from int256, reverting on\\n * overflow (when the input is less than smallest int16 or\\n * greater than largest int16).\\n *\\n * Counterpart to Solidity's `int16` operator.\\n *\\n * Requirements:\\n *\\n * - input must fit into 16 bits\\n *\\n * _Available since v3.1._\\n */\\n function toInt16(int256 value) internal pure returns (int16) {\\n require(value >= type(int16).min && value <= type(int16).max, \\\"SafeCast: value doesn't fit in 16 bits\\\");\\n return int16(value);\\n }\\n\\n /**\\n * @dev Returns the downcasted int8 from int256, reverting on\\n * overflow (when the input is less than smallest int8 or\\n * greater than largest int8).\\n *\\n * Counterpart to Solidity's `int8` operator.\\n *\\n * Requirements:\\n *\\n * - input must fit into 8 bits.\\n *\\n * _Available since v3.1._\\n */\\n function toInt8(int256 value) internal pure returns (int8) {\\n require(value >= type(int8).min && value <= type(int8).max, \\\"SafeCast: value doesn't fit in 8 bits\\\");\\n return int8(value);\\n }\\n\\n /**\\n * @dev Converts an unsigned uint256 into a signed int256.\\n *\\n * Requirements:\\n *\\n * - input must be less than or equal to maxInt256.\\n */\\n function toInt256(uint256 value) internal pure returns (int256) {\\n // Note: Unsafe cast below is okay because `type(int256).max` is guaranteed to be positive\\n require(value <= uint256(type(int256).max), \\\"SafeCast: value doesn't fit in an int256\\\");\\n return int256(value);\\n }\\n}\\n\",\"keccak256\":\"0x5c6caab697d302ad7eb59c234a4d2dbc965c1bae87709bd2850060b7695b28c7\",\"license\":\"MIT\"},\"contracts/GovernanceToken.sol\":{\"content\":\"// SPDX-License-Identifier: MIT\\npragma solidity 0.8.12;\\n\\nimport \\\"@openzeppelin/contracts/token/ERC20/ERC20.sol\\\";\\nimport \\\"@openzeppelin/contracts/token/ERC20/extensions/ERC20Burnable.sol\\\";\\nimport \\\"@openzeppelin/contracts/token/ERC20/extensions/ERC20Votes.sol\\\";\\nimport \\\"@openzeppelin/contracts/access/Ownable.sol\\\";\\n\\n/**\\n * @dev The Optimism token used in governance and supporting voting and delegation.\\n * Implements EIP 2612 allowing signed approvals.\\n * Contract is \\\"owned\\\" by a `MintManager` instance with permission to the `mint` function only,\\n * for the purposes of enforcing the token inflation schedule.\\n */\\ncontract GovernanceToken is ERC20Burnable, ERC20Votes, Ownable {\\n /**\\n * @dev Constructor.\\n */\\n constructor() ERC20(\\\"Optimism\\\", \\\"OP\\\") ERC20Permit(\\\"Optimism\\\") {}\\n\\n function mint(address _account, uint256 _amount) public onlyOwner {\\n _mint(_account, _amount);\\n }\\n\\n // The following functions are overrides required by Solidity.\\n function _afterTokenTransfer(\\n address from,\\n address to,\\n uint256 amount\\n ) internal override(ERC20, ERC20Votes) {\\n super._afterTokenTransfer(from, to, amount);\\n }\\n\\n function _mint(address to, uint256 amount) internal override(ERC20, ERC20Votes) {\\n super._mint(to, amount);\\n }\\n\\n function _burn(address account, uint256 amount) internal override(ERC20, ERC20Votes) {\\n super._burn(account, amount);\\n }\\n}\\n\",\"keccak256\":\"0x9686248fc10e71c30b05bc86a7b7749f12f74e5701c9d73b15ca9f75b9093839\",\"license\":\"MIT\"},\"contracts/MintManager.sol\":{\"content\":\"// SPDX-License-Identifier: MIT\\npragma solidity 0.8.12;\\n\\nimport \\\"@openzeppelin/contracts/access/Ownable.sol\\\";\\nimport \\\"./GovernanceToken.sol\\\";\\n\\n/**\\n * @title MintManager\\n * @notice Set as `owner` of the OP token and responsible for the token inflation schedule.\\n * Contract acts as the token \\\"mint manager\\\" with permission to the `mint` function only.\\n * Currently permitted to mint once per year of up to 2% of the total token supply.\\n * Upgradable to allow changes in the inflation schedule.\\n */\\ncontract MintManager is Ownable {\\n /**\\n * @notice The GovernanceToken that the MintManager can mint tokens\\n */\\n GovernanceToken public immutable governanceToken;\\n\\n /**\\n * @notice The amount of tokens that can be minted per year. The value is a fixed\\n * point number with 4 decimals.\\n */\\n uint256 public constant MINT_CAP = 20; // 2%\\n\\n /**\\n * @notice The number of decimals for the MINT_CAP.\\n */\\n uint256 public constant DENOMINATOR = 1000;\\n\\n /**\\n * @notice The amount of time that must pass before the MINT_CAP number of tokens can\\n * be minted again.\\n */\\n uint256 public constant MINT_PERIOD = 365 days;\\n\\n /**\\n * @notice Tracks the time of last mint\\n */\\n uint256 public mintPermittedAfter;\\n\\n /**\\n * @param _upgrader The owner of this contract\\n * @param _governanceToken The governance token this contract can mint\\n * tokens of\\n */\\n constructor(address _upgrader, address _governanceToken) {\\n transferOwnership(_upgrader);\\n governanceToken = GovernanceToken(_governanceToken);\\n }\\n\\n /**\\n * @notice Only the token owner is allowed to mint a certain amount of OP per year.\\n *\\n * @param _account Address to mint new tokens to.\\n * @param _amount Amount of tokens to be minted.\\n */\\n function mint(address _account, uint256 _amount) public onlyOwner {\\n if (mintPermittedAfter > 0) {\\n require(mintPermittedAfter <= block.timestamp, \\\"OP: minting not permitted yet\\\");\\n\\n require(\\n _amount <= (governanceToken.totalSupply() * MINT_CAP) / DENOMINATOR,\\n \\\"OP: mint amount exceeds cap\\\"\\n );\\n }\\n\\n mintPermittedAfter = block.timestamp + MINT_PERIOD;\\n\\n governanceToken.mint(_account, _amount);\\n }\\n\\n /**\\n * @notice Upgrade the owner of the governance token to a new MintManager.\\n *\\n * @param _newMintManager The MintManager to upgrade to\\n */\\n function upgrade(address _newMintManager) public onlyOwner {\\n require(_newMintManager != address(0), \\\"OP: Mint manager cannot be empty\\\");\\n\\n governanceToken.transferOwnership(_newMintManager);\\n }\\n}\\n\",\"keccak256\":\"0x502e1e705839a9840823fe4c2eef2cf7f717b548c2259c6c5cf5e62753fbd940\",\"license\":\"MIT\"}},\"version\":1}", "bytecode": 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"devdoc": { "kind": "dev", "methods": { "constructor": { "params": { "_governanceToken": "The governance token this contract can mint tokens of", "_upgrader": "The owner of this contract" } }, "mint(address,uint256)": { "params": { "_account": "Address to mint new tokens to.", "_amount": "Amount of tokens to be minted." } }, "owner()": { "details": "Returns the address of the current owner." }, "renounceOwnership()": { "details": "Leaves the contract without owner. It will not be possible to call `onlyOwner` functions anymore. Can only be called by the current owner. NOTE: Renouncing ownership will leave the contract without an owner, thereby removing any functionality that is only available to the owner." }, "transferOwnership(address)": { "details": "Transfers ownership of the contract to a new account (`newOwner`). Can only be called by the current owner." }, "upgrade(address)": { "params": { "_newMintManager": "The MintManager to upgrade to" } } }, "title": "MintManager", "version": 1 }, "userdoc": { "kind": "user", "methods": { "DENOMINATOR()": { "notice": "The number of decimals for the MINT_CAP." }, "MINT_CAP()": { "notice": "The amount of tokens that can be minted per year. The value is a fixed point number with 4 decimals." }, "MINT_PERIOD()": { "notice": "The amount of time that must pass before the MINT_CAP number of tokens can be minted again." }, "governanceToken()": { "notice": "The GovernanceToken that the MintManager can mint tokens" }, "mint(address,uint256)": { "notice": "Only the token owner is allowed to mint a certain amount of OP per year." }, "mintPermittedAfter()": { "notice": "Tracks the time of last mint" }, "upgrade(address)": { "notice": "Upgrade the owner of the governance token to a new MintManager." } }, "notice": "Set as `owner` of the OP token and responsible for the token inflation schedule. Contract acts as the token \"mint manager\" with permission to the `mint` function only. Currently permitted to mint once per year of up to 2% of the total token supply. Upgradable to allow changes in the inflation schedule.", "version": 1 }, "storageLayout": { "storage": [ { "astId": 7, "contract": "contracts/MintManager.sol:MintManager", "label": "_owner", "offset": 0, "slot": "0", "type": "t_address" }, { "astId": 3573, "contract": "contracts/MintManager.sol:MintManager", "label": "mintPermittedAfter", "offset": 0, "slot": "1", "type": "t_uint256" } ], "types": { "t_address": { "encoding": "inplace", "label": "address", "numberOfBytes": "20" }, "t_uint256": { "encoding": "inplace", "label": "uint256", "numberOfBytes": "32" } } } }