{ "contractName": "ERC20", "abi": [ { "inputs": [ { "internalType": "string", "name": "name_", "type": "string" }, { "internalType": "string", "name": "symbol_", "type": "string" } ], "stateMutability": "nonpayable", "type": "constructor" }, { "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": "name", "outputs": [ { "internalType": "string", "name": "", "type": "string" } ], "stateMutability": "view", "type": "function" }, { "inputs": [], "name": "symbol", "outputs": [ { "internalType": "string", "name": "", "type": "string" } ], "stateMutability": "view", "type": "function" }, { "inputs": [], "name": "decimals", "outputs": [ { "internalType": "uint8", "name": "", "type": "uint8" } ], "stateMutability": "view", "type": "function" }, { "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": "to", "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": "from", "type": "address" }, { "internalType": "address", "name": "to", "type": "address" }, { "internalType": "uint256", "name": "amount", "type": "uint256" } ], "name": "transferFrom", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "stateMutability": "nonpayable", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "spender", "type": "address" }, { "internalType": "uint256", "name": "addedValue", "type": "uint256" } ], "name": "increaseAllowance", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "stateMutability": "nonpayable", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "spender", "type": "address" }, { "internalType": "uint256", "name": "subtractedValue", "type": "uint256" } ], "name": "decreaseAllowance", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "stateMutability": "nonpayable", "type": "function" } ], "metadata": "{\"compiler\":{\"version\":\"0.8.11+commit.d7f03943\"},\"language\":\"Solidity\",\"output\":{\"abi\":[{\"inputs\":[{\"internalType\":\"string\",\"name\":\"name_\",\"type\":\"string\"},{\"internalType\":\"string\",\"name\":\"symbol_\",\"type\":\"string\"}],\"stateMutability\":\"nonpayable\",\"type\":\"constructor\"},{\"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\":\"decimals\",\"outputs\":[{\"internalType\":\"uint8\",\"name\":\"\",\"type\":\"uint8\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"spender\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"subtractedValue\",\"type\":\"uint256\"}],\"name\":\"decreaseAllowance\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"spender\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"addedValue\",\"type\":\"uint256\"}],\"name\":\"increaseAllowance\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"name\",\"outputs\":[{\"internalType\":\"string\",\"name\":\"\",\"type\":\"string\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"symbol\",\"outputs\":[{\"internalType\":\"string\",\"name\":\"\",\"type\":\"string\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"totalSupply\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"amount\",\"type\":\"uint256\"}],\"name\":\"transfer\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"from\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"amount\",\"type\":\"uint256\"}],\"name\":\"transferFrom\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"}],\"devdoc\":{\"details\":\"Implementation of the {IERC20} interface. This implementation is agnostic to the way tokens are created. This means that a supply mechanism has to be added in a derived contract using {_mint}. For a generic mechanism see {ERC20PresetMinterPauser}. TIP: For a detailed writeup see our guide https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How to implement supply mechanisms]. We have followed general OpenZeppelin Contracts guidelines: functions revert instead returning `false` on failure. This behavior is nonetheless conventional and does not conflict with the expectations of ERC20 applications. Additionally, an {Approval} event is emitted on calls to {transferFrom}. This allows applications to reconstruct the allowance for all accounts just by listening to said events. Other implementations of the EIP may not emit these events, as it isn't required by the specification. Finally, the non-standard {decreaseAllowance} and {increaseAllowance} functions have been added to mitigate the well-known issues around setting allowances. See {IERC20-approve}.\",\"kind\":\"dev\",\"methods\":{\"allowance(address,address)\":{\"details\":\"See {IERC20-allowance}.\"},\"approve(address,uint256)\":{\"details\":\"See {IERC20-approve}. NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on `transferFrom`. This is semantically equivalent to an infinite approval. Requirements: - `spender` cannot be the zero address.\"},\"balanceOf(address)\":{\"details\":\"See {IERC20-balanceOf}.\"},\"constructor\":{\"details\":\"Sets the values for {name} and {symbol}. The default value of {decimals} is 18. To select a different value for {decimals} you should overload it. All two of these values are immutable: they can only be set once during construction.\"},\"decimals()\":{\"details\":\"Returns the number of decimals used to get its user representation. For example, if `decimals` equals `2`, a balance of `505` tokens should be displayed to a user as `5.05` (`505 / 10 ** 2`). Tokens usually opt for a value of 18, imitating the relationship between Ether and Wei. This is the value {ERC20} uses, unless this function is overridden; NOTE: This information is only used for _display_ purposes: it in no way affects any of the arithmetic of the contract, including {IERC20-balanceOf} and {IERC20-transfer}.\"},\"decreaseAllowance(address,uint256)\":{\"details\":\"Atomically decreases the allowance granted to `spender` by the caller. This is an alternative to {approve} that can be used as a mitigation for problems described in {IERC20-approve}. Emits an {Approval} event indicating the updated allowance. Requirements: - `spender` cannot be the zero address. - `spender` must have allowance for the caller of at least `subtractedValue`.\"},\"increaseAllowance(address,uint256)\":{\"details\":\"Atomically increases the allowance granted to `spender` by the caller. This is an alternative to {approve} that can be used as a mitigation for problems described in {IERC20-approve}. Emits an {Approval} event indicating the updated allowance. Requirements: - `spender` cannot be the zero address.\"},\"name()\":{\"details\":\"Returns the name of the token.\"},\"symbol()\":{\"details\":\"Returns the symbol of the token, usually a shorter version of the name.\"},\"totalSupply()\":{\"details\":\"See {IERC20-totalSupply}.\"},\"transfer(address,uint256)\":{\"details\":\"See {IERC20-transfer}. Requirements: - `to` cannot be the zero address. - the caller must have a balance of at least `amount`.\"},\"transferFrom(address,address,uint256)\":{\"details\":\"See {IERC20-transferFrom}. Emits an {Approval} event indicating the updated allowance. This is not required by the EIP. See the note at the beginning of {ERC20}. NOTE: Does not update the allowance if the current allowance is the maximum `uint256`. Requirements: - `from` and `to` cannot be the zero address. - `from` must have a balance of at least `amount`. - the caller must have allowance for ``from``'s tokens of at least `amount`.\"}},\"version\":1},\"userdoc\":{\"kind\":\"user\",\"methods\":{},\"version\":1}},\"settings\":{\"compilationTarget\":{\"@openzeppelin/contracts/token/ERC20/ERC20.sol\":\"ERC20\"},\"evmVersion\":\"london\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\"},\"optimizer\":{\"enabled\":true,\"runs\":200},\"remappings\":[]},\"sources\":{\"@openzeppelin/contracts/token/ERC20/ERC20.sol\":{\"keccak256\":\"0xdadd41acb749920eccf40aeaa8d291adf9751399a7343561bad13e7a8d99be0b\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://12af4ac016f9fdf3be5d15824f4292272aa11f6b2e0192a0f7320f5ad49bbbf0\",\"dweb:/ipfs/QmRXMpdqCgA3TYuYxBodqs5p9jGbnMW6xa2gvjppvq4TWk\"]},\"@openzeppelin/contracts/token/ERC20/IERC20.sol\":{\"keccak256\":\"0xbbc8ac883ac3c0078ce5ad3e288fbb3ffcc8a30c3a98c0fda0114d64fc44fca2\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://87a7a5d2f6f63f84598af02b8c50ca2df2631cb8ba2453e8d95fcb17e4be9824\",\"dweb:/ipfs/QmR76hqtAcRqoFj33tmNjcWTLrgNsAaakYwnKZ8zoJtKei\"]},\"@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol\":{\"keccak256\":\"0x8de418a5503946cabe331f35fe242d3201a73f67f77aaeb7110acb1f30423aca\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://5a376d3dda2cb70536c0a45c208b29b34ac560c4cb4f513a42079f96ba47d2dd\",\"dweb:/ipfs/QmZQg6gn1sUpM8wHzwNvSnihumUCAhxD119MpXeKp8B9s8\"]},\"@openzeppelin/contracts/utils/Context.sol\":{\"keccak256\":\"0xe2e337e6dde9ef6b680e07338c493ebea1b5fd09b43424112868e9cc1706bca7\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://6df0ddf21ce9f58271bdfaa85cde98b200ef242a05a3f85c2bc10a8294800a92\",\"dweb:/ipfs/QmRK2Y5Yc6BK7tGKkgsgn3aJEQGi5aakeSPZvS65PV8Xp3\"]}},\"version\":1}", 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}, "nodeType": "YulExpressionStatement", "src": "1924:15:56" }, { "expression": { "arguments": [ { "kind": "number", "nodeType": "YulLiteral", "src": "1959:1:56", "type": "", "value": "0" }, { "kind": "number", "nodeType": "YulLiteral", "src": "1962:4:56", "type": "", "value": "0x24" } ], "functionName": { "name": "revert", "nodeType": "YulIdentifier", "src": "1952:6:56" }, "nodeType": "YulFunctionCall", "src": "1952:15:56" }, "nodeType": "YulExpressionStatement", "src": "1952:15:56" } ] }, "condition": { "arguments": [ { "name": "outOfPlaceEncoding", "nodeType": "YulIdentifier", "src": "1822:18:56" }, { "arguments": [ { "name": "length", "nodeType": "YulIdentifier", "src": "1845:6:56" }, { "kind": "number", "nodeType": "YulLiteral", "src": "1853:2:56", "type": "", "value": "32" } ], "functionName": { "name": "lt", "nodeType": "YulIdentifier", "src": "1842:2:56" }, "nodeType": "YulFunctionCall", "src": "1842:14:56" } ], "functionName": { "name": "eq", "nodeType": "YulIdentifier", "src": "1819:2:56" }, "nodeType": "YulFunctionCall", "src": "1819:38:56" }, "nodeType": "YulIf", "src": "1816:161:56" } ] }, "name": "extract_byte_array_length", "nodeType": "YulFunctionDefinition", "parameters": [ { "name": "data", "nodeType": "YulTypedName", "src": "1638:4:56", "type": "" } ], "returnVariables": [ { "name": "length", "nodeType": "YulTypedName", "src": "1647:6:56", "type": "" } ], "src": "1603:380:56" } ] }, "contents": "{\n { }\n function panic_error_0x41()\n {\n mstore(0, shl(224, 0x4e487b71))\n mstore(4, 0x41)\n revert(0, 0x24)\n }\n function abi_decode_string_fromMemory(offset, end) -> array\n {\n if iszero(slt(add(offset, 0x1f), end)) { revert(0, 0) }\n let _1 := mload(offset)\n let _2 := sub(shl(64, 1), 1)\n if gt(_1, _2) { panic_error_0x41() }\n let _3 := not(31)\n let memPtr := mload(64)\n let newFreePtr := add(memPtr, and(add(and(add(_1, 0x1f), _3), 63), _3))\n if or(gt(newFreePtr, _2), lt(newFreePtr, memPtr)) { panic_error_0x41() }\n mstore(64, newFreePtr)\n mstore(memPtr, _1)\n let _4 := 0x20\n if gt(add(add(offset, _1), _4), end) { revert(0, 0) }\n let i := 0\n for { } lt(i, _1) { i := add(i, _4) }\n {\n mstore(add(add(memPtr, i), _4), mload(add(add(offset, i), _4)))\n }\n if gt(i, _1)\n {\n mstore(add(add(memPtr, _1), _4), 0)\n }\n array := memPtr\n }\n function abi_decode_tuple_t_string_memory_ptrt_string_memory_ptr_fromMemory(headStart, dataEnd) -> value0, value1\n {\n if slt(sub(dataEnd, headStart), 64) { revert(0, 0) }\n let offset := mload(headStart)\n let _1 := sub(shl(64, 1), 1)\n if gt(offset, _1) { revert(0, 0) }\n value0 := abi_decode_string_fromMemory(add(headStart, offset), dataEnd)\n let offset_1 := mload(add(headStart, 32))\n if gt(offset_1, _1) { revert(0, 0) }\n value1 := abi_decode_string_fromMemory(add(headStart, offset_1), dataEnd)\n }\n function extract_byte_array_length(data) -> length\n {\n length := shr(1, data)\n let outOfPlaceEncoding := and(data, 1)\n if iszero(outOfPlaceEncoding) { length := and(length, 0x7f) }\n if eq(outOfPlaceEncoding, lt(length, 32))\n {\n mstore(0, shl(224, 0x4e487b71))\n mstore(4, 0x22)\n revert(0, 0x24)\n }\n }\n}", "id": 56, "language": "Yul", "name": "#utility.yul" } ], "deployedGeneratedSources": [ { "ast": { "nodeType": "YulBlock", "src": "0:5806:56", "statements": [ { "nodeType": "YulBlock", "src": "6:3:56", "statements": [] }, { "body": { "nodeType": "YulBlock", "src": "135:476:56", "statements": [ { "nodeType": "YulVariableDeclaration", "src": "145:12:56", "value": { "kind": "number", "nodeType": "YulLiteral", "src": "155:2:56", "type": "", "value": "32" }, "variables": [ { "name": "_1", "nodeType": "YulTypedName", "src": "149:2:56", "type": "" } ] }, { "expression": { "arguments": [ { "name": "headStart", "nodeType": "YulIdentifier", "src": "173:9:56" }, { "name": "_1", "nodeType": "YulIdentifier", "src": "184:2:56" } ], "functionName": { "name": "mstore", "nodeType": "YulIdentifier", "src": "166:6:56" }, "nodeType": "YulFunctionCall", "src": "166:21:56" }, 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"name": "abi_encode_tuple_t_stringliteral_4107e8a8b9e94bf8ff83080ddec1c0bffe897ebc2241b89d44f66b3d274088b6__to_t_string_memory_ptr__fromStack_reversed", "nodeType": "YulFunctionDefinition", "parameters": [ { "name": "headStart", "nodeType": "YulTypedName", "src": "5553:9:56", "type": "" } ], "returnVariables": [ { "name": "tail", "nodeType": "YulTypedName", "src": "5567:4:56", "type": "" } ], "src": "5402:402:56" } ] }, "contents": "{\n { }\n function abi_encode_tuple_t_string_memory_ptr__to_t_string_memory_ptr__fromStack_reversed(headStart, value0) -> tail\n {\n let _1 := 32\n mstore(headStart, _1)\n let length := mload(value0)\n mstore(add(headStart, _1), length)\n let i := 0\n for { } lt(i, length) { i := add(i, _1) }\n {\n mstore(add(add(headStart, i), 64), mload(add(add(value0, i), _1)))\n }\n if gt(i, length)\n {\n mstore(add(add(headStart, length), 64), 0)\n }\n tail := add(add(headStart, and(add(length, 31), not(31))), 64)\n }\n function abi_decode_address(offset) -> value\n {\n value := calldataload(offset)\n if iszero(eq(value, and(value, sub(shl(160, 1), 1)))) { revert(0, 0) }\n }\n function abi_decode_tuple_t_addresst_uint256(headStart, dataEnd) -> value0, value1\n {\n if slt(sub(dataEnd, headStart), 64) { revert(0, 0) }\n value0 := abi_decode_address(headStart)\n value1 := calldataload(add(headStart, 32))\n }\n function abi_encode_tuple_t_bool__to_t_bool__fromStack_reversed(headStart, value0) -> tail\n {\n tail := add(headStart, 32)\n mstore(headStart, iszero(iszero(value0)))\n }\n function abi_encode_tuple_t_uint256__to_t_uint256__fromStack_reversed(headStart, value0) -> tail\n {\n tail := add(headStart, 32)\n mstore(headStart, value0)\n }\n function abi_decode_tuple_t_addresst_addresst_uint256(headStart, dataEnd) -> value0, value1, value2\n {\n if slt(sub(dataEnd, headStart), 96) { revert(0, 0) }\n value0 := abi_decode_address(headStart)\n value1 := abi_decode_address(add(headStart, 32))\n value2 := calldataload(add(headStart, 64))\n }\n function abi_encode_tuple_t_uint8__to_t_uint8__fromStack_reversed(headStart, value0) -> tail\n {\n tail := add(headStart, 32)\n mstore(headStart, and(value0, 0xff))\n }\n function abi_decode_tuple_t_address(headStart, dataEnd) -> value0\n {\n if slt(sub(dataEnd, headStart), 32) { revert(0, 0) }\n value0 := abi_decode_address(headStart)\n }\n function abi_decode_tuple_t_addresst_address(headStart, dataEnd) -> value0, value1\n {\n if slt(sub(dataEnd, headStart), 64) { revert(0, 0) }\n value0 := abi_decode_address(headStart)\n value1 := abi_decode_address(add(headStart, 32))\n }\n function extract_byte_array_length(data) -> length\n {\n length := shr(1, data)\n let outOfPlaceEncoding := and(data, 1)\n if iszero(outOfPlaceEncoding) { length := and(length, 0x7f) }\n if eq(outOfPlaceEncoding, lt(length, 32))\n {\n mstore(0, shl(224, 0x4e487b71))\n mstore(4, 0x22)\n revert(0, 0x24)\n }\n }\n function checked_add_t_uint256(x, y) -> sum\n {\n if gt(x, not(y))\n {\n mstore(0, shl(224, 0x4e487b71))\n mstore(4, 0x11)\n revert(0, 0x24)\n }\n sum := add(x, y)\n }\n function abi_encode_tuple_t_stringliteral_f8b476f7d28209d77d4a4ac1fe36b9f8259aa1bb6bddfa6e89de7e51615cf8a8__to_t_string_memory_ptr__fromStack_reversed(headStart) -> tail\n {\n mstore(headStart, 32)\n mstore(add(headStart, 32), 37)\n mstore(add(headStart, 64), \"ERC20: decreased allowance below\")\n mstore(add(headStart, 96), \" zero\")\n tail := add(headStart, 128)\n }\n function abi_encode_tuple_t_stringliteral_c953f4879035ed60e766b34720f656aab5c697b141d924c283124ecedb91c208__to_t_string_memory_ptr__fromStack_reversed(headStart) -> tail\n {\n mstore(headStart, 32)\n mstore(add(headStart, 32), 36)\n mstore(add(headStart, 64), \"ERC20: approve from the zero add\")\n mstore(add(headStart, 96), \"ress\")\n tail := add(headStart, 128)\n }\n function abi_encode_tuple_t_stringliteral_24883cc5fe64ace9d0df1893501ecb93c77180f0ff69cca79affb3c316dc8029__to_t_string_memory_ptr__fromStack_reversed(headStart) -> tail\n {\n mstore(headStart, 32)\n mstore(add(headStart, 32), 34)\n mstore(add(headStart, 64), \"ERC20: approve to the zero addre\")\n mstore(add(headStart, 96), \"ss\")\n tail := add(headStart, 128)\n }\n function abi_encode_tuple_t_stringliteral_3b6607e091cba9325f958656d2b5e0622ab7dc0eac71a26ac788cb25bc19f4fe__to_t_string_memory_ptr__fromStack_reversed(headStart) -> tail\n {\n mstore(headStart, 32)\n mstore(add(headStart, 32), 29)\n mstore(add(headStart, 64), \"ERC20: insufficient allowance\")\n tail := add(headStart, 96)\n }\n function abi_encode_tuple_t_stringliteral_baecc556b46f4ed0f2b4cb599d60785ac8563dd2dc0a5bf12edea1c39e5e1fea__to_t_string_memory_ptr__fromStack_reversed(headStart) -> tail\n {\n mstore(headStart, 32)\n mstore(add(headStart, 32), 37)\n mstore(add(headStart, 64), \"ERC20: transfer from the zero ad\")\n mstore(add(headStart, 96), \"dress\")\n tail := add(headStart, 128)\n }\n function abi_encode_tuple_t_stringliteral_0557e210f7a69a685100a7e4e3d0a7024c546085cee28910fd17d0b081d9516f__to_t_string_memory_ptr__fromStack_reversed(headStart) -> tail\n {\n mstore(headStart, 32)\n mstore(add(headStart, 32), 35)\n mstore(add(headStart, 64), \"ERC20: transfer to the zero addr\")\n mstore(add(headStart, 96), \"ess\")\n tail := add(headStart, 128)\n }\n function abi_encode_tuple_t_stringliteral_4107e8a8b9e94bf8ff83080ddec1c0bffe897ebc2241b89d44f66b3d274088b6__to_t_string_memory_ptr__fromStack_reversed(headStart) -> tail\n {\n mstore(headStart, 32)\n mstore(add(headStart, 32), 38)\n mstore(add(headStart, 64), \"ERC20: transfer amount exceeds b\")\n mstore(add(headStart, 96), \"alance\")\n tail := add(headStart, 128)\n }\n}", "id": 56, "language": "Yul", "name": "#utility.yul" } ], "sourceMap": 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"source": "// 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", "sourcePath": "@openzeppelin/contracts/token/ERC20/ERC20.sol", "ast": { "absolutePath": "@openzeppelin/contracts/token/ERC20/ERC20.sol", "exportedSymbols": { "Context": [ 5297 ], "ERC20": [ 2806 ], "IERC20": [ 2884 ], "IERC20Metadata": [ 3590 ] }, "id": 2807, "license": "MIT", "nodeType": "SourceUnit", "nodes": [ { "id": 2220, "literals": [ "solidity", "^", "0.8", ".0" ], "nodeType": "PragmaDirective", "src": "105:23:13" }, { "absolutePath": "@openzeppelin/contracts/token/ERC20/IERC20.sol", "file": "./IERC20.sol", "id": 2221, "nameLocation": "-1:-1:-1", "nodeType": "ImportDirective", "scope": 2807, "sourceUnit": 2885, "src": "130:22:13", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol", "file": "./extensions/IERC20Metadata.sol", "id": 2222, "nameLocation": "-1:-1:-1", "nodeType": "ImportDirective", "scope": 2807, "sourceUnit": 3591, "src": "153:41:13", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "@openzeppelin/contracts/utils/Context.sol", "file": "../../utils/Context.sol", "id": 2223, "nameLocation": "-1:-1:-1", "nodeType": "ImportDirective", "scope": 2807, "sourceUnit": 5298, "src": "195:33:13", "symbolAliases": [], "unitAlias": "" }, { "abstract": false, "baseContracts": [ { "baseName": { "id": 2225, "name": "Context", "nodeType": "IdentifierPath", "referencedDeclaration": 5297, "src": "1421:7:13" }, "id": 2226, "nodeType": "InheritanceSpecifier", "src": "1421:7:13" }, { "baseName": { "id": 2227, "name": "IERC20", "nodeType": "IdentifierPath", "referencedDeclaration": 2884, "src": "1430:6:13" }, "id": 2228, "nodeType": "InheritanceSpecifier", "src": "1430:6:13" }, { "baseName": { "id": 2229, "name": "IERC20Metadata", "nodeType": "IdentifierPath", "referencedDeclaration": 3590, "src": "1438:14:13" }, "id": 2230, "nodeType": "InheritanceSpecifier", "src": "1438:14:13" } ], "canonicalName": "ERC20", "contractDependencies": [], "contractKind": "contract", "documentation": { "id": 2224, "nodeType": "StructuredDocumentation", "src": "230:1172:13", "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 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 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": 2806, "linearizedBaseContracts": [ 2806, 3590, 2884, 5297 ], "name": "ERC20", "nameLocation": "1412:5:13", "nodeType": "ContractDefinition", "nodes": [ { "constant": false, "id": 2234, "mutability": "mutable", "name": "_balances", "nameLocation": "1495:9:13", "nodeType": "VariableDeclaration", "scope": 2806, "src": "1459:45:13", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" }, "typeName": { "id": 2233, "keyType": { "id": 2231, "name": "address", "nodeType": "ElementaryTypeName", "src": "1467:7:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Mapping", "src": "1459:27:13", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" }, "valueType": { "id": 2232, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1478:7:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } }, "visibility": "private" }, { "constant": false, "id": 2240, "mutability": "mutable", "name": "_allowances", "nameLocation": "1567:11:13", "nodeType": "VariableDeclaration", "scope": 2806, "src": "1511:67:13", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" }, "typeName": { "id": 2239, "keyType": { "id": 2235, "name": "address", "nodeType": "ElementaryTypeName", "src": "1519:7:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Mapping", "src": "1511:47:13", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" }, "valueType": { "id": 2238, "keyType": { "id": 2236, "name": "address", "nodeType": "ElementaryTypeName", "src": "1538:7:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Mapping", "src": "1530:27:13", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" }, "valueType": { "id": 2237, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1549:7:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } } }, "visibility": "private" }, { "constant": false, "id": 2242, "mutability": "mutable", "name": "_totalSupply", "nameLocation": "1601:12:13", "nodeType": "VariableDeclaration", "scope": 2806, "src": "1585:28:13", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 2241, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1585:7:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "private" }, { "constant": false, "id": 2244, "mutability": "mutable", "name": "_name", "nameLocation": "1635:5:13", "nodeType": "VariableDeclaration", "scope": 2806, "src": "1620:20:13", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_string_storage", "typeString": "string" }, "typeName": { "id": 2243, "name": "string", "nodeType": "ElementaryTypeName", "src": "1620:6:13", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "visibility": "private" }, { "constant": false, "id": 2246, "mutability": "mutable", "name": "_symbol", "nameLocation": "1661:7:13", "nodeType": "VariableDeclaration", "scope": 2806, "src": "1646:22:13", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_string_storage", "typeString": "string" }, "typeName": { "id": 2245, "name": "string", "nodeType": "ElementaryTypeName", "src": "1646:6:13", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "visibility": "private" }, { "body": { "id": 2262, "nodeType": "Block", "src": "2034:57:13", "statements": [ { "expression": { "id": 2256, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "id": 2254, "name": "_name", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2244, "src": "2044:5:13", "typeDescriptions": { "typeIdentifier": "t_string_storage", "typeString": "string storage ref" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "id": 2255, "name": "name_", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2249, "src": "2052:5:13", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string memory" } }, "src": "2044:13:13", "typeDescriptions": { "typeIdentifier": "t_string_storage", "typeString": "string storage ref" } }, "id": 2257, "nodeType": "ExpressionStatement", "src": "2044:13:13" }, { "expression": { "id": 2260, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "id": 2258, "name": "_symbol", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2246, "src": "2067:7:13", "typeDescriptions": { "typeIdentifier": "t_string_storage", "typeString": "string storage ref" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "id": 2259, "name": "symbol_", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2251, "src": "2077:7:13", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string memory" } }, "src": "2067:17:13", "typeDescriptions": { "typeIdentifier": "t_string_storage", "typeString": "string storage ref" } }, "id": 2261, "nodeType": "ExpressionStatement", "src": "2067:17:13" } ] }, "documentation": { "id": 2247, "nodeType": "StructuredDocumentation", "src": "1675:298:13", "text": " @dev Sets the values for {name} and {symbol}.\n The default 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": 2263, "implemented": true, "kind": "constructor", "modifiers": [], "name": "", "nameLocation": "-1:-1:-1", "nodeType": "FunctionDefinition", "parameters": { "id": 2252, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2249, "mutability": "mutable", "name": "name_", "nameLocation": "2004:5:13", "nodeType": "VariableDeclaration", "scope": 2263, "src": "1990:19:13", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string" }, "typeName": { "id": 2248, "name": "string", "nodeType": "ElementaryTypeName", "src": "1990:6:13", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "visibility": "internal" }, { "constant": false, "id": 2251, "mutability": "mutable", "name": "symbol_", "nameLocation": "2025:7:13", "nodeType": "VariableDeclaration", "scope": 2263, "src": "2011:21:13", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string" }, "typeName": { "id": 2250, "name": "string", "nodeType": "ElementaryTypeName", "src": "2011:6:13", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "visibility": "internal" } ], "src": "1989:44:13" }, "returnParameters": { "id": 2253, "nodeType": "ParameterList", "parameters": [], "src": "2034:0:13" }, "scope": 2806, "src": "1978:113:13", "stateMutability": "nonpayable", "virtual": false, "visibility": "public" }, { "baseFunctions": [ 3577 ], "body": { "id": 2272, "nodeType": "Block", "src": "2225:29:13", "statements": [ { "expression": { "id": 2270, "name": "_name", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2244, "src": "2242:5:13", "typeDescriptions": { "typeIdentifier": "t_string_storage", "typeString": "string storage ref" } }, "functionReturnParameters": 2269, "id": 2271, "nodeType": "Return", "src": "2235:12:13" } ] }, "documentation": { "id": 2264, "nodeType": "StructuredDocumentation", "src": "2097:54:13", "text": " @dev Returns the name of the token." }, "functionSelector": "06fdde03", "id": 2273, "implemented": true, "kind": "function", "modifiers": [], "name": "name", "nameLocation": "2165:4:13", "nodeType": "FunctionDefinition", "overrides": { "id": 2266, "nodeType": "OverrideSpecifier", "overrides": [], "src": "2192:8:13" }, "parameters": { "id": 2265, "nodeType": "ParameterList", "parameters": [], "src": "2169:2:13" }, "returnParameters": { "id": 2269, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2268, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 2273, "src": "2210:13:13", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string" }, "typeName": { "id": 2267, "name": "string", "nodeType": "ElementaryTypeName", "src": "2210:6:13", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "visibility": "internal" } ], "src": "2209:15:13" }, "scope": 2806, "src": "2156:98:13", "stateMutability": "view", "virtual": true, "visibility": "public" }, { "baseFunctions": [ 3583 ], "body": { "id": 2282, "nodeType": "Block", "src": "2438:31:13", "statements": [ { "expression": { "id": 2280, "name": "_symbol", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2246, "src": "2455:7:13", "typeDescriptions": { "typeIdentifier": "t_string_storage", "typeString": "string storage ref" } }, "functionReturnParameters": 2279, "id": 2281, "nodeType": "Return", "src": "2448:14:13" } ] }, "documentation": { "id": 2274, "nodeType": "StructuredDocumentation", "src": "2260:102:13", "text": " @dev Returns the symbol of the token, usually a shorter version of the\n name." }, "functionSelector": "95d89b41", "id": 2283, "implemented": true, "kind": "function", "modifiers": [], "name": "symbol", "nameLocation": "2376:6:13", "nodeType": "FunctionDefinition", "overrides": { "id": 2276, "nodeType": "OverrideSpecifier", "overrides": [], "src": "2405:8:13" }, "parameters": { "id": 2275, "nodeType": "ParameterList", "parameters": [], "src": "2382:2:13" }, "returnParameters": { "id": 2279, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2278, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 2283, "src": "2423:13:13", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string" }, "typeName": { "id": 2277, "name": "string", "nodeType": "ElementaryTypeName", "src": "2423:6:13", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "visibility": "internal" } ], "src": "2422:15:13" }, "scope": 2806, "src": "2367:102:13", "stateMutability": "view", "virtual": true, "visibility": "public" }, { "baseFunctions": [ 3589 ], "body": { "id": 2292, "nodeType": "Block", "src": "3158:26:13", "statements": [ { "expression": { "hexValue": "3138", "id": 2290, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "3175:2:13", "typeDescriptions": { "typeIdentifier": "t_rational_18_by_1", "typeString": "int_const 18" }, "value": "18" }, "functionReturnParameters": 2289, "id": 2291, "nodeType": "Return", "src": "3168:9:13" } ] }, "documentation": { "id": 2284, "nodeType": "StructuredDocumentation", "src": "2475:613:13", "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": 2293, "implemented": true, "kind": "function", "modifiers": [], "name": "decimals", "nameLocation": "3102:8:13", "nodeType": "FunctionDefinition", "overrides": { "id": 2286, "nodeType": "OverrideSpecifier", "overrides": [], "src": "3133:8:13" }, "parameters": { "id": 2285, "nodeType": "ParameterList", "parameters": [], "src": "3110:2:13" }, "returnParameters": { "id": 2289, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2288, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 2293, "src": "3151:5:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" }, "typeName": { "id": 2287, "name": "uint8", "nodeType": "ElementaryTypeName", "src": "3151:5:13", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "visibility": "internal" } ], "src": "3150:7:13" }, "scope": 2806, "src": "3093:91:13", "stateMutability": "view", "virtual": true, "visibility": "public" }, { "baseFunctions": [ 2815 ], "body": { "id": 2302, "nodeType": "Block", "src": "3314:36:13", "statements": [ { "expression": { "id": 2300, "name": "_totalSupply", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2242, "src": "3331:12:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "functionReturnParameters": 2299, "id": 2301, "nodeType": "Return", "src": "3324:19:13" } ] }, "documentation": { "id": 2294, "nodeType": "StructuredDocumentation", "src": "3190:49:13", "text": " @dev See {IERC20-totalSupply}." }, "functionSelector": "18160ddd", "id": 2303, "implemented": true, "kind": "function", "modifiers": [], "name": "totalSupply", "nameLocation": "3253:11:13", "nodeType": "FunctionDefinition", "overrides": { "id": 2296, "nodeType": "OverrideSpecifier", "overrides": [], "src": "3287:8:13" }, "parameters": { "id": 2295, "nodeType": "ParameterList", "parameters": [], "src": "3264:2:13" }, "returnParameters": { "id": 2299, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2298, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 2303, "src": "3305:7:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 2297, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3305:7:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "3304:9:13" }, "scope": 2806, "src": "3244:106:13", "stateMutability": "view", "virtual": true, "visibility": "public" }, { "baseFunctions": [ 2823 ], "body": { "id": 2316, "nodeType": "Block", "src": "3491:42:13", "statements": [ { "expression": { "baseExpression": { "id": 2312, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2234, "src": "3508:9:13", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 2314, "indexExpression": { "id": 2313, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2306, "src": "3518:7:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "3508:18:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "functionReturnParameters": 2311, "id": 2315, "nodeType": "Return", "src": "3501:25:13" } ] }, "documentation": { "id": 2304, "nodeType": "StructuredDocumentation", "src": "3356:47:13", "text": " @dev See {IERC20-balanceOf}." }, "functionSelector": "70a08231", "id": 2317, "implemented": true, "kind": "function", "modifiers": [], "name": "balanceOf", "nameLocation": "3417:9:13", "nodeType": "FunctionDefinition", "overrides": { "id": 2308, "nodeType": "OverrideSpecifier", "overrides": [], "src": "3464:8:13" }, "parameters": { "id": 2307, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2306, "mutability": "mutable", "name": "account", "nameLocation": "3435:7:13", "nodeType": "VariableDeclaration", "scope": 2317, "src": "3427:15:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 2305, "name": "address", "nodeType": "ElementaryTypeName", "src": "3427:7:13", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" } ], "src": "3426:17:13" }, "returnParameters": { "id": 2311, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2310, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 2317, "src": "3482:7:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 2309, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3482:7:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "3481:9:13" }, "scope": 2806, "src": "3408:125:13", "stateMutability": "view", "virtual": true, "visibility": "public" }, { "baseFunctions": [ 2833 ], "body": { "id": 2341, "nodeType": "Block", "src": "3814:104:13", "statements": [ { "assignments": [ 2329 ], "declarations": [ { "constant": false, "id": 2329, "mutability": "mutable", "name": "owner", "nameLocation": "3832:5:13", "nodeType": "VariableDeclaration", "scope": 2341, "src": "3824:13:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 2328, "name": "address", "nodeType": "ElementaryTypeName", "src": "3824:7:13", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" } ], "id": 2332, "initialValue": { "arguments": [], "expression": { "argumentTypes": [], "id": 2330, "name": "_msgSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5287, "src": "3840:10:13", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_address_$", "typeString": "function () view returns (address)" } }, "id": 2331, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3840:12:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "VariableDeclarationStatement", "src": "3824:28:13" }, { "expression": { "arguments": [ { "id": 2334, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2329, "src": "3872:5:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 2335, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2320, "src": "3879:2:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 2336, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2322, "src": "3883:6:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 2333, "name": "_transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2567, "src": "3862:9:13", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 2337, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3862:28:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 2338, "nodeType": "ExpressionStatement", "src": "3862:28:13" }, { "expression": { "hexValue": "74727565", "id": 2339, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "3907:4:13", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "functionReturnParameters": 2327, "id": 2340, "nodeType": "Return", "src": "3900:11:13" } ] }, "documentation": { "id": 2318, "nodeType": "StructuredDocumentation", "src": "3539:185:13", "text": " @dev See {IERC20-transfer}.\n Requirements:\n - `to` cannot be the zero address.\n - the caller must have a balance of at least `amount`." }, "functionSelector": "a9059cbb", "id": 2342, "implemented": true, "kind": "function", "modifiers": [], "name": "transfer", "nameLocation": "3738:8:13", "nodeType": "FunctionDefinition", "overrides": { "id": 2324, "nodeType": "OverrideSpecifier", "overrides": [], "src": "3790:8:13" }, "parameters": { "id": 2323, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2320, "mutability": "mutable", "name": "to", "nameLocation": "3755:2:13", "nodeType": "VariableDeclaration", "scope": 2342, "src": "3747:10:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 2319, "name": "address", "nodeType": "ElementaryTypeName", "src": "3747:7:13", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 2322, "mutability": "mutable", "name": "amount", "nameLocation": "3767:6:13", "nodeType": "VariableDeclaration", "scope": 2342, "src": "3759:14:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 2321, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3759:7:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "3746:28:13" }, "returnParameters": { "id": 2327, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2326, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 2342, "src": "3808:4:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 2325, "name": "bool", "nodeType": "ElementaryTypeName", "src": "3808:4:13", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "visibility": "internal" } ], "src": "3807:6:13" }, "scope": 2806, "src": "3729:189:13", "stateMutability": "nonpayable", "virtual": true, "visibility": "public" }, { "baseFunctions": [ 2843 ], "body": { "id": 2359, "nodeType": "Block", "src": "4074:51:13", "statements": [ { "expression": { "baseExpression": { "baseExpression": { "id": 2353, "name": "_allowances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2240, "src": "4091:11:13", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" } }, "id": 2355, "indexExpression": { "id": 2354, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2345, "src": "4103:5:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "4091:18:13", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 2357, "indexExpression": { "id": 2356, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2347, "src": "4110:7:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "4091:27:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "functionReturnParameters": 2352, "id": 2358, "nodeType": "Return", "src": "4084:34:13" } ] }, "documentation": { "id": 2343, "nodeType": "StructuredDocumentation", "src": "3924:47:13", "text": " @dev See {IERC20-allowance}." }, "functionSelector": "dd62ed3e", "id": 2360, "implemented": true, "kind": "function", "modifiers": [], "name": "allowance", "nameLocation": "3985:9:13", "nodeType": "FunctionDefinition", "overrides": { "id": 2349, "nodeType": "OverrideSpecifier", "overrides": [], "src": "4047:8:13" }, "parameters": { "id": 2348, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2345, "mutability": "mutable", "name": "owner", "nameLocation": "4003:5:13", "nodeType": "VariableDeclaration", "scope": 2360, "src": "3995:13:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 2344, "name": "address", "nodeType": "ElementaryTypeName", "src": "3995:7:13", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 2347, "mutability": "mutable", "name": "spender", "nameLocation": "4018:7:13", "nodeType": "VariableDeclaration", "scope": 2360, "src": "4010:15:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 2346, "name": "address", "nodeType": "ElementaryTypeName", "src": "4010:7:13", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" } ], "src": "3994:32:13" }, "returnParameters": { "id": 2352, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2351, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 2360, "src": "4065:7:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 2350, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "4065:7:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "4064:9:13" }, "scope": 2806, "src": "3976:149:13", "stateMutability": "view", "virtual": true, "visibility": "public" }, { "baseFunctions": [ 2853 ], "body": { "id": 2384, "nodeType": "Block", "src": "4522:108:13", "statements": [ { "assignments": [ 2372 ], "declarations": [ { "constant": false, "id": 2372, "mutability": "mutable", "name": "owner", "nameLocation": "4540:5:13", "nodeType": "VariableDeclaration", "scope": 2384, "src": "4532:13:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 2371, "name": "address", "nodeType": "ElementaryTypeName", "src": "4532:7:13", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" } ], "id": 2375, "initialValue": { "arguments": [], "expression": { "argumentTypes": [], "id": 2373, "name": "_msgSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5287, "src": "4548:10:13", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_address_$", "typeString": "function () view returns (address)" } }, "id": 2374, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4548:12:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "VariableDeclarationStatement", "src": "4532:28:13" }, { "expression": { "arguments": [ { "id": 2377, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2372, "src": "4579:5:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 2378, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2363, "src": "4586:7:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 2379, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2365, "src": "4595:6:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 2376, "name": "_approve", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2740, "src": "4570:8:13", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 2380, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4570:32:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 2381, "nodeType": "ExpressionStatement", "src": "4570:32:13" }, { "expression": { "hexValue": "74727565", "id": 2382, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "4619:4:13", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "functionReturnParameters": 2370, "id": 2383, "nodeType": "Return", "src": "4612:11:13" } ] }, "documentation": { "id": 2361, "nodeType": "StructuredDocumentation", "src": "4131:297:13", "text": " @dev See {IERC20-approve}.\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 Requirements:\n - `spender` cannot be the zero address." }, "functionSelector": "095ea7b3", "id": 2385, "implemented": true, "kind": "function", "modifiers": [], "name": "approve", "nameLocation": "4442:7:13", "nodeType": "FunctionDefinition", "overrides": { "id": 2367, "nodeType": "OverrideSpecifier", "overrides": [], "src": "4498:8:13" }, "parameters": { "id": 2366, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2363, "mutability": "mutable", "name": "spender", "nameLocation": "4458:7:13", "nodeType": "VariableDeclaration", "scope": 2385, "src": "4450:15:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 2362, "name": "address", "nodeType": "ElementaryTypeName", "src": "4450:7:13", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 2365, "mutability": "mutable", "name": "amount", "nameLocation": "4475:6:13", "nodeType": "VariableDeclaration", "scope": 2385, "src": "4467:14:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 2364, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "4467:7:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "4449:33:13" }, "returnParameters": { "id": 2370, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2369, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 2385, "src": "4516:4:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 2368, "name": "bool", "nodeType": "ElementaryTypeName", "src": "4516:4:13", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "visibility": "internal" } ], "src": "4515:6:13" }, "scope": 2806, "src": "4433:197:13", "stateMutability": "nonpayable", "virtual": true, "visibility": "public" }, { "baseFunctions": [ 2865 ], "body": { "id": 2417, "nodeType": "Block", "src": "5325:153:13", "statements": [ { "assignments": [ 2399 ], "declarations": [ { "constant": false, "id": 2399, "mutability": "mutable", "name": "spender", "nameLocation": "5343:7:13", "nodeType": "VariableDeclaration", "scope": 2417, "src": "5335:15:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 2398, "name": "address", "nodeType": "ElementaryTypeName", "src": "5335:7:13", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" } ], "id": 2402, "initialValue": { "arguments": [], "expression": { "argumentTypes": [], "id": 2400, "name": "_msgSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5287, "src": "5353:10:13", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_address_$", "typeString": "function () view returns (address)" } }, "id": 2401, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5353:12:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "VariableDeclarationStatement", "src": "5335:30:13" }, { "expression": { "arguments": [ { "id": 2404, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2388, "src": "5391:4:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 2405, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2399, "src": "5397:7:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 2406, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2392, "src": "5406:6:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 2403, "name": "_spendAllowance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2783, "src": "5375:15:13", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 2407, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5375:38:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 2408, "nodeType": "ExpressionStatement", "src": "5375:38:13" }, { "expression": { "arguments": [ { "id": 2410, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2388, "src": "5433:4:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 2411, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2390, "src": "5439:2:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 2412, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2392, "src": "5443:6:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 2409, "name": "_transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2567, "src": "5423:9:13", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 2413, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5423:27:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 2414, "nodeType": "ExpressionStatement", "src": "5423:27:13" }, { "expression": { "hexValue": "74727565", "id": 2415, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "5467:4:13", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "functionReturnParameters": 2397, "id": 2416, "nodeType": "Return", "src": "5460:11:13" } ] }, "documentation": { "id": 2386, "nodeType": "StructuredDocumentation", "src": "4636:551:13", "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 NOTE: Does not update the allowance if the current allowance\n is the maximum `uint256`.\n Requirements:\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`." }, "functionSelector": "23b872dd", "id": 2418, "implemented": true, "kind": "function", "modifiers": [], "name": "transferFrom", "nameLocation": "5201:12:13", "nodeType": "FunctionDefinition", "overrides": { "id": 2394, "nodeType": "OverrideSpecifier", "overrides": [], "src": "5301:8:13" }, "parameters": { "id": 2393, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2388, "mutability": "mutable", "name": "from", "nameLocation": "5231:4:13", "nodeType": "VariableDeclaration", "scope": 2418, "src": "5223:12:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 2387, "name": "address", "nodeType": "ElementaryTypeName", "src": "5223:7:13", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 2390, "mutability": "mutable", "name": "to", "nameLocation": "5253:2:13", "nodeType": "VariableDeclaration", "scope": 2418, "src": "5245:10:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 2389, "name": "address", "nodeType": "ElementaryTypeName", "src": "5245:7:13", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 2392, "mutability": "mutable", "name": "amount", "nameLocation": "5273:6:13", "nodeType": "VariableDeclaration", "scope": 2418, "src": "5265:14:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 2391, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "5265:7:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "5213:72:13" }, "returnParameters": { "id": 2397, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2396, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 2418, "src": "5319:4:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 2395, "name": "bool", "nodeType": "ElementaryTypeName", "src": "5319:4:13", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "visibility": "internal" } ], "src": "5318:6:13" }, "scope": 2806, "src": "5192:286:13", "stateMutability": "nonpayable", "virtual": true, "visibility": "public" }, { "body": { "id": 2447, "nodeType": "Block", "src": "5967:142:13", "statements": [ { "assignments": [ 2429 ], "declarations": [ { "constant": false, "id": 2429, "mutability": "mutable", "name": "owner", "nameLocation": "5985:5:13", "nodeType": "VariableDeclaration", "scope": 2447, "src": "5977:13:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 2428, "name": "address", "nodeType": "ElementaryTypeName", "src": "5977:7:13", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" } ], "id": 2432, "initialValue": { "arguments": [], "expression": { "argumentTypes": [], "id": 2430, "name": "_msgSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5287, "src": "5993:10:13", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_address_$", "typeString": "function () view returns (address)" } }, "id": 2431, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5993:12:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "VariableDeclarationStatement", "src": "5977:28:13" }, { "expression": { "arguments": [ { "id": 2434, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2429, "src": "6024:5:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 2435, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2421, "src": "6031:7:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 2442, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "baseExpression": { "baseExpression": { "id": 2436, "name": "_allowances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2240, "src": "6040:11:13", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" } }, "id": 2438, "indexExpression": { "id": 2437, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2429, "src": "6052:5:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "6040:18:13", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 2440, "indexExpression": { "id": 2439, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2421, "src": "6059:7:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "6040:27:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "+", "rightExpression": { "id": 2441, "name": "addedValue", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2423, "src": "6070:10:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "6040:40:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 2433, "name": "_approve", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2740, "src": "6015:8:13", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 2443, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6015:66:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 2444, "nodeType": "ExpressionStatement", "src": "6015:66:13" }, { "expression": { "hexValue": "74727565", "id": 2445, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "6098:4:13", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "functionReturnParameters": 2427, "id": 2446, "nodeType": "Return", "src": "6091:11:13" } ] }, "documentation": { "id": 2419, "nodeType": "StructuredDocumentation", "src": "5484:384:13", "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": 2448, "implemented": true, "kind": "function", "modifiers": [], "name": "increaseAllowance", "nameLocation": "5882:17:13", "nodeType": "FunctionDefinition", "parameters": { "id": 2424, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2421, "mutability": "mutable", "name": "spender", "nameLocation": "5908:7:13", "nodeType": "VariableDeclaration", "scope": 2448, "src": "5900:15:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 2420, "name": "address", "nodeType": "ElementaryTypeName", "src": "5900:7:13", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 2423, "mutability": "mutable", "name": "addedValue", "nameLocation": "5925:10:13", "nodeType": "VariableDeclaration", "scope": 2448, "src": "5917:18:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 2422, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "5917:7:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "5899:37:13" }, "returnParameters": { "id": 2427, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2426, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 2448, "src": "5961:4:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 2425, "name": "bool", "nodeType": "ElementaryTypeName", "src": "5961:4:13", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "visibility": "internal" } ], "src": "5960:6:13" }, "scope": 2806, "src": "5873:236:13", "stateMutability": "nonpayable", "virtual": true, "visibility": "public" }, { "body": { "id": 2489, "nodeType": "Block", "src": "6695:330:13", "statements": [ { "assignments": [ 2459 ], "declarations": [ { "constant": false, "id": 2459, "mutability": "mutable", "name": "owner", "nameLocation": "6713:5:13", "nodeType": "VariableDeclaration", "scope": 2489, "src": "6705:13:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 2458, "name": "address", "nodeType": "ElementaryTypeName", "src": "6705:7:13", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" } ], "id": 2462, "initialValue": { "arguments": [], "expression": { "argumentTypes": [], "id": 2460, "name": "_msgSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5287, "src": "6721:10:13", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_address_$", "typeString": "function () view returns (address)" } }, "id": 2461, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6721:12:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "VariableDeclarationStatement", "src": "6705:28:13" }, { "assignments": [ 2464 ], "declarations": [ { "constant": false, "id": 2464, "mutability": "mutable", "name": "currentAllowance", "nameLocation": "6751:16:13", "nodeType": "VariableDeclaration", "scope": 2489, "src": "6743:24:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 2463, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "6743:7:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "id": 2470, "initialValue": { "baseExpression": { "baseExpression": { "id": 2465, "name": "_allowances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2240, "src": "6770:11:13", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" } }, "id": 2467, "indexExpression": { "id": 2466, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2459, "src": "6782:5:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "6770:18:13", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 2469, "indexExpression": { "id": 2468, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2451, "src": "6789:7:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "6770:27:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "VariableDeclarationStatement", "src": "6743:54:13" }, { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 2474, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 2472, "name": "currentAllowance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2464, "src": "6815:16:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": ">=", "rightExpression": { "id": 2473, "name": "subtractedValue", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2453, "src": "6835:15:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "6815:35:13", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a2064656372656173656420616c6c6f77616e63652062656c6f77207a65726f", "id": 2475, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "6852:39:13", "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": 2471, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "6807:7:13", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 2476, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6807:85:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 2477, "nodeType": "ExpressionStatement", "src": "6807:85:13" }, { "id": 2486, "nodeType": "UncheckedBlock", "src": "6902:95:13", "statements": [ { "expression": { "arguments": [ { "id": 2479, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2459, "src": "6935:5:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 2480, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2451, "src": "6942:7:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 2483, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 2481, "name": "currentAllowance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2464, "src": "6951:16:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "-", "rightExpression": { "id": 2482, "name": "subtractedValue", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2453, "src": "6970:15:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "6951:34:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 2478, "name": "_approve", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2740, "src": "6926:8:13", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 2484, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6926:60:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 2485, "nodeType": "ExpressionStatement", "src": "6926:60:13" } ] }, { "expression": { "hexValue": "74727565", "id": 2487, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "7014:4:13", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "functionReturnParameters": 2457, "id": 2488, "nodeType": "Return", "src": "7007:11:13" } ] }, "documentation": { "id": 2449, "nodeType": "StructuredDocumentation", "src": "6115:476:13", "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": 2490, "implemented": true, "kind": "function", "modifiers": [], "name": "decreaseAllowance", "nameLocation": "6605:17:13", "nodeType": "FunctionDefinition", "parameters": { "id": 2454, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2451, "mutability": "mutable", "name": "spender", "nameLocation": "6631:7:13", "nodeType": "VariableDeclaration", "scope": 2490, "src": "6623:15:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 2450, "name": "address", "nodeType": "ElementaryTypeName", "src": "6623:7:13", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 2453, "mutability": "mutable", "name": "subtractedValue", "nameLocation": "6648:15:13", "nodeType": "VariableDeclaration", "scope": 2490, "src": "6640:23:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 2452, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "6640:7:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "6622:42:13" }, "returnParameters": { "id": 2457, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2456, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 2490, "src": "6689:4:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 2455, "name": "bool", "nodeType": "ElementaryTypeName", "src": "6689:4:13", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "visibility": "internal" } ], "src": "6688:6:13" }, "scope": 2806, "src": "6596:429:13", "stateMutability": "nonpayable", "virtual": true, "visibility": "public" }, { "body": { "id": 2566, "nodeType": "Block", "src": "7596:543:13", "statements": [ { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 2506, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 2501, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2493, "src": "7614:4:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "arguments": [ { "hexValue": "30", "id": 2504, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "7630:1:13", "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": 2503, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "7622:7:13", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 2502, "name": "address", "nodeType": "ElementaryTypeName", "src": "7622:7:13", "typeDescriptions": {} } }, "id": 2505, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7622:10:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "7614:18:13", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a207472616e736665722066726f6d20746865207a65726f2061646472657373", "id": 2507, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "7634:39:13", "typeDescriptions": { "typeIdentifier": "t_stringliteral_baecc556b46f4ed0f2b4cb599d60785ac8563dd2dc0a5bf12edea1c39e5e1fea", "typeString": "literal_string \"ERC20: transfer from the zero address\"" }, "value": 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}, { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 2516, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 2511, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2495, "src": "7692:2:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "arguments": [ { "hexValue": "30", "id": 2514, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "7706:1:13", "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": 2513, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "7698:7:13", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 2512, "name": "address", "nodeType": "ElementaryTypeName", "src": "7698:7:13", "typeDescriptions": {} } }, "id": 2515, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7698:10:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "7692:16:13", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a207472616e7366657220746f20746865207a65726f2061646472657373", "id": 2517, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "7710:37:13", "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": 2510, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "7684:7:13", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 2518, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7684:64:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 2519, "nodeType": "ExpressionStatement", "src": "7684:64:13" }, { "expression": { "arguments": [ { "id": 2521, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2493, "src": "7780:4:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 2522, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2495, "src": "7786:2:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 2523, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2497, "src": "7790:6:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 2520, "name": "_beforeTokenTransfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2794, "src": "7759:20:13", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 2524, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7759:38:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 2525, "nodeType": "ExpressionStatement", "src": "7759:38:13" }, { "assignments": [ 2527 ], "declarations": [ { "constant": false, "id": 2527, "mutability": "mutable", "name": "fromBalance", "nameLocation": "7816:11:13", "nodeType": "VariableDeclaration", "scope": 2566, "src": "7808:19:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 2526, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "7808:7:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "id": 2531, "initialValue": { "baseExpression": { "id": 2528, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2234, "src": "7830:9:13", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 2530, "indexExpression": { "id": 2529, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2493, "src": "7840:4:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "7830:15:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "VariableDeclarationStatement", "src": "7808:37:13" }, { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 2535, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 2533, "name": "fromBalance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2527, "src": "7863:11:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": ">=", "rightExpression": { "id": 2534, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2497, "src": "7878:6:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "7863:21:13", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a207472616e7366657220616d6f756e7420657863656564732062616c616e6365", "id": 2536, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "7886:40:13", "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": 2532, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "7855:7:13", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 2537, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7855:72:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 2538, "nodeType": "ExpressionStatement", "src": "7855:72:13" }, { "id": 2547, "nodeType": "UncheckedBlock", "src": "7937:73:13", "statements": [ { "expression": { "id": 2545, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "id": 2539, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2234, "src": "7961:9:13", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 2541, "indexExpression": { "id": 2540, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2493, "src": "7971:4:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "7961:15:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 2544, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 2542, "name": "fromBalance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2527, "src": "7979:11:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "-", "rightExpression": { "id": 2543, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2497, "src": "7993:6:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "7979:20:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "7961:38:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 2546, "nodeType": "ExpressionStatement", "src": "7961:38:13" } ] }, { "expression": { "id": 2552, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "id": 2548, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2234, "src": "8019:9:13", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 2550, "indexExpression": { "id": 2549, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2495, "src": "8029:2:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "8019:13:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "+=", "rightHandSide": { "id": 2551, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2497, "src": "8036:6:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "8019:23:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 2553, "nodeType": "ExpressionStatement", "src": "8019:23:13" }, { "eventCall": { "arguments": [ { "id": 2555, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2493, "src": "8067:4:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 2556, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2495, "src": "8073:2:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 2557, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2497, "src": "8077:6:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 2554, "name": "Transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2874, "src": "8058:8:13", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 2558, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8058:26:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 2559, "nodeType": "EmitStatement", "src": "8053:31:13" }, { "expression": { "arguments": [ { "id": 2561, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2493, "src": "8115:4:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 2562, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2495, "src": "8121:2:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 2563, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2497, "src": "8125:6:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 2560, "name": "_afterTokenTransfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2805, "src": "8095:19:13", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 2564, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8095:37:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 2565, "nodeType": "ExpressionStatement", "src": "8095:37:13" } ] }, "documentation": { "id": 2491, "nodeType": "StructuredDocumentation", "src": "7031:452:13", "text": " @dev Moves `amount` of tokens from `sender` to `recipient`.\n This 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 - `from` cannot be the zero address.\n - `to` cannot be the zero address.\n - `from` must have a balance of at least `amount`." }, "id": 2567, "implemented": true, "kind": "function", "modifiers": [], "name": "_transfer", "nameLocation": "7497:9:13", "nodeType": "FunctionDefinition", "parameters": { "id": 2498, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2493, "mutability": "mutable", "name": "from", "nameLocation": "7524:4:13", "nodeType": "VariableDeclaration", "scope": 2567, "src": "7516:12:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 2492, "name": "address", "nodeType": "ElementaryTypeName", "src": "7516:7:13", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 2495, "mutability": "mutable", "name": "to", "nameLocation": "7546:2:13", "nodeType": "VariableDeclaration", "scope": 2567, "src": "7538:10:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 2494, "name": "address", "nodeType": "ElementaryTypeName", "src": "7538:7:13", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 2497, "mutability": "mutable", "name": "amount", "nameLocation": 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}, { "id": 2590, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2570, "src": "8599:7:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 2591, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2572, "src": "8608:6:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 2585, "name": "_beforeTokenTransfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2794, "src": "8566:20:13", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 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"typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "+=", "rightHandSide": { "id": 2601, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2572, "src": "8680:6:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "8658:28:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 2603, "nodeType": "ExpressionStatement", "src": "8658:28:13" }, { "eventCall": { "arguments": [ { "arguments": [ { "hexValue": "30", "id": 2607, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "8718:1:13", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 2606, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "8710:7:13", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 2605, "name": "address", "nodeType": "ElementaryTypeName", "src": "8710:7:13", "typeDescriptions": {} } }, "id": 2608, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8710:10:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 2609, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2570, "src": "8722:7:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 2610, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2572, "src": "8731:6:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 2604, "name": "Transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2874, "src": "8701:8:13", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 2611, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8701:37:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 2612, "nodeType": "EmitStatement", "src": "8696:42:13" }, { "expression": { "arguments": [ { "arguments": [ { "hexValue": "30", "id": 2616, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "8777:1:13", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 2615, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "8769:7:13", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 2614, "name": "address", "nodeType": "ElementaryTypeName", "src": "8769:7:13", "typeDescriptions": {} } }, "id": 2617, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8769:10:13", "tryCall": false, 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"referencedDeclaration": 2628, "src": "9319:6:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 2641, "name": "_beforeTokenTransfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2794, "src": "9277:20:13", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 2648, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9277:49:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 2649, "nodeType": "ExpressionStatement", "src": "9277:49:13" }, { "assignments": [ 2651 ], "declarations": [ { "constant": false, "id": 2651, "mutability": "mutable", "name": "accountBalance", "nameLocation": "9345:14:13", "nodeType": "VariableDeclaration", "scope": 2694, "src": "9337:22:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 2650, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "9337:7:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "id": 2655, "initialValue": { "baseExpression": { "id": 2652, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2234, "src": "9362:9:13", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 2654, "indexExpression": { "id": 2653, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2626, "src": "9372:7:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "9362:18:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "VariableDeclarationStatement", "src": "9337:43:13" }, { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 2659, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 2657, "name": "accountBalance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2651, "src": "9398:14:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": ">=", "rightExpression": { "id": 2658, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2628, "src": "9416:6:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "9398:24:13", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a206275726e20616d6f756e7420657863656564732062616c616e6365", "id": 2660, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "9424:36:13", "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": 2656, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "9390:7:13", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 2661, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9390:71:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 2662, "nodeType": "ExpressionStatement", "src": "9390:71:13" }, { "id": 2671, "nodeType": "UncheckedBlock", "src": "9471:79:13", "statements": [ { "expression": { "id": 2669, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "id": 2663, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2234, "src": "9495:9:13", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 2665, "indexExpression": { "id": 2664, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2626, "src": "9505:7:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "9495:18:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 2668, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 2666, "name": "accountBalance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2651, "src": "9516:14:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "-", "rightExpression": { "id": 2667, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2628, "src": "9533:6:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "9516:23:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "9495:44:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 2670, "nodeType": "ExpressionStatement", "src": "9495:44:13" } ] }, { "expression": { "id": 2674, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "id": 2672, "name": "_totalSupply", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2242, "src": "9559:12:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "-=", "rightHandSide": { "id": 2673, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2628, "src": "9575:6:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "9559:22:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 2675, "nodeType": "ExpressionStatement", "src": "9559:22:13" }, { "eventCall": { "arguments": [ { "id": 2677, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2626, "src": "9606:7:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "arguments": [ { "hexValue": "30", "id": 2680, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9623:1:13", "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": 2679, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "9615:7:13", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 2678, "name": "address", "nodeType": "ElementaryTypeName", "src": "9615:7:13", "typeDescriptions": {} } }, "id": 2681, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9615:10:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 2682, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2628, "src": "9627:6:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 2676, "name": "Transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2874, "src": "9597:8:13", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 2683, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9597:37:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 2684, "nodeType": "EmitStatement", "src": "9592:42:13" }, { "expression": { "arguments": [ { "id": 2686, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2626, "src": "9665:7:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "arguments": [ { "hexValue": "30", "id": 2689, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9682:1:13", "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": 2688, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "9674:7:13", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 2687, "name": "address", "nodeType": "ElementaryTypeName", "src": "9674:7:13", "typeDescriptions": {} } }, "id": 2690, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9674:10:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 2691, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2628, "src": "9686:6:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 2685, "name": "_afterTokenTransfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2805, "src": "9645:19:13", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 2692, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9645:48:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 2693, "nodeType": "ExpressionStatement", "src": "9645:48:13" } ] }, "documentation": { "id": 2624, "nodeType": "StructuredDocumentation", "src": "8810:309:13", "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": 2695, "implemented": true, "kind": "function", "modifiers": [], "name": "_burn", "nameLocation": "9133:5:13", "nodeType": "FunctionDefinition", "parameters": { "id": 2629, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2626, "mutability": "mutable", "name": "account", "nameLocation": "9147:7:13", "nodeType": "VariableDeclaration", "scope": 2695, "src": "9139:15:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 2625, "name": "address", "nodeType": "ElementaryTypeName", "src": "9139:7:13", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 2628, "mutability": "mutable", "name": "amount", "nameLocation": "9164:6:13", "nodeType": "VariableDeclaration", "scope": 2695, "src": "9156:14:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 2627, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "9156:7:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "9138:33:13" }, "returnParameters": { "id": 2630, "nodeType": "ParameterList", "parameters": [], "src": "9189:0:13" }, "scope": 2806, "src": "9124:576:13", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 2739, "nodeType": "Block", "src": "10236:257:13", "statements": [ { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 2711, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 2706, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2698, "src": "10254:5:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "arguments": [ { "hexValue": "30", "id": 2709, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "10271:1:13", "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": 2708, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "10263:7:13", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 2707, "name": "address", "nodeType": "ElementaryTypeName", "src": "10263:7:13", "typeDescriptions": {} } }, "id": 2710, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10263:10:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "10254:19:13", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a20617070726f76652066726f6d20746865207a65726f2061646472657373", "id": 2712, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "10275:38:13", "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": 2705, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "10246:7:13", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 2713, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10246:68:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 2714, "nodeType": "ExpressionStatement", "src": "10246:68:13" }, { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 2721, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 2716, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2700, "src": "10332:7:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "arguments": [ { "hexValue": "30", "id": 2719, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "10351:1:13", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 2718, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "10343:7:13", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 2717, "name": "address", "nodeType": "ElementaryTypeName", "src": "10343:7:13", "typeDescriptions": {} } }, "id": 2720, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10343:10:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "10332:21:13", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a20617070726f766520746f20746865207a65726f2061646472657373", "id": 2722, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "10355:36:13", "typeDescriptions": { "typeIdentifier": "t_stringliteral_24883cc5fe64ace9d0df1893501ecb93c77180f0ff69cca79affb3c316dc8029", "typeString": "literal_string \"ERC20: approve to the zero address\"" }, "value": "ERC20: approve to the zero address" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_24883cc5fe64ace9d0df1893501ecb93c77180f0ff69cca79affb3c316dc8029", "typeString": "literal_string \"ERC20: approve to the zero address\"" } ], "id": 2715, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "10324:7:13", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 2723, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10324:68:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 2724, "nodeType": "ExpressionStatement", "src": "10324:68:13" }, { "expression": { "id": 2731, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "baseExpression": { "id": 2725, "name": "_allowances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2240, "src": "10403:11:13", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" } }, "id": 2728, "indexExpression": { "id": 2726, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2698, "src": "10415:5:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "10403:18:13", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 2729, "indexExpression": { "id": 2727, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2700, "src": "10422:7:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "10403:27:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "id": 2730, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2702, "src": "10433:6:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "10403:36:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 2732, "nodeType": "ExpressionStatement", "src": "10403:36:13" }, { "eventCall": { "arguments": [ { "id": 2734, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2698, "src": "10463:5:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 2735, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2700, "src": "10470:7:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 2736, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2702, "src": "10479:6:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 2733, "name": "Approval", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2883, "src": "10454:8:13", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 2737, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10454:32:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 2738, "nodeType": "EmitStatement", "src": "10449:37:13" } ] }, "documentation": { "id": 2696, "nodeType": "StructuredDocumentation", "src": "9706:412:13", "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": 2740, "implemented": true, "kind": "function", "modifiers": [], "name": "_approve", "nameLocation": "10132:8:13", "nodeType": "FunctionDefinition", "parameters": { "id": 2703, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2698, "mutability": "mutable", "name": "owner", "nameLocation": "10158:5:13", "nodeType": "VariableDeclaration", "scope": 2740, "src": "10150:13:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 2697, "name": "address", "nodeType": "ElementaryTypeName", "src": "10150:7:13", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 2700, "mutability": "mutable", "name": "spender", "nameLocation": "10181:7:13", "nodeType": "VariableDeclaration", "scope": 2740, "src": "10173:15:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 2699, "name": "address", "nodeType": "ElementaryTypeName", "src": "10173:7:13", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 2702, "mutability": "mutable", "name": "amount", "nameLocation": "10206:6:13", "nodeType": "VariableDeclaration", "scope": 2740, "src": "10198:14:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 2701, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "10198:7:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "10140:78:13" }, "returnParameters": { "id": 2704, "nodeType": "ParameterList", "parameters": [], "src": "10236:0:13" }, "scope": 2806, "src": "10123:370:13", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 2782, "nodeType": "Block", "src": "10890:321:13", "statements": [ { "assignments": [ 2751 ], "declarations": [ { "constant": false, "id": 2751, "mutability": "mutable", "name": "currentAllowance", "nameLocation": "10908:16:13", "nodeType": "VariableDeclaration", "scope": 2782, "src": "10900:24:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 2750, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "10900:7:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "id": 2756, "initialValue": { "arguments": [ { "id": 2753, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2743, "src": "10937:5:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 2754, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2745, "src": "10944:7:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" } ], "id": 2752, "name": "allowance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2360, "src": "10927:9:13", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_address_$_t_address_$returns$_t_uint256_$", "typeString": "function (address,address) view returns (uint256)" } }, "id": 2755, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10927:25:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "VariableDeclarationStatement", "src": "10900:52:13" }, { "condition": { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 2763, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 2757, "name": "currentAllowance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2751, "src": "10966:16:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "expression": { "arguments": [ { "id": 2760, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "10991:7:13", "typeDescriptions": { "typeIdentifier": "t_type$_t_uint256_$", "typeString": "type(uint256)" }, "typeName": { "id": 2759, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "10991:7:13", "typeDescriptions": {} } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_type$_t_uint256_$", "typeString": "type(uint256)" } ], "id": 2758, "name": "type", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4294967269, "src": "10986:4:13", "typeDescriptions": { "typeIdentifier": "t_function_metatype_pure$__$returns$__$", "typeString": "function () pure" } }, "id": 2761, "isConstant": false, "isLValue": false, "isPure": true, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10986:13:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_magic_meta_type_t_uint256", "typeString": "type(uint256)" } }, "id": 2762, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "memberName": "max", "nodeType": "MemberAccess", "src": "10986:17:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "10966:37:13", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "id": 2781, "nodeType": "IfStatement", "src": "10962:243:13", "trueBody": { "id": 2780, "nodeType": "Block", "src": "11005:200:13", "statements": [ { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 2767, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 2765, "name": "currentAllowance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2751, "src": "11027:16:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": ">=", "rightExpression": { "id": 2766, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2747, "src": "11047:6:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "11027:26:13", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a20696e73756666696369656e7420616c6c6f77616e6365", "id": 2768, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "11055:31:13", "typeDescriptions": { "typeIdentifier": "t_stringliteral_3b6607e091cba9325f958656d2b5e0622ab7dc0eac71a26ac788cb25bc19f4fe", "typeString": "literal_string \"ERC20: insufficient allowance\"" }, "value": "ERC20: insufficient allowance" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_3b6607e091cba9325f958656d2b5e0622ab7dc0eac71a26ac788cb25bc19f4fe", "typeString": "literal_string \"ERC20: insufficient allowance\"" } ], "id": 2764, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "11019:7:13", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 2769, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "11019:68:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 2770, "nodeType": "ExpressionStatement", "src": "11019:68:13" }, { "id": 2779, "nodeType": "UncheckedBlock", "src": "11101:94:13", "statements": [ { "expression": { "arguments": [ { "id": 2772, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2743, "src": "11138:5:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 2773, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2745, "src": "11145:7:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 2776, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 2774, "name": "currentAllowance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2751, "src": "11154:16:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "-", "rightExpression": { "id": 2775, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2747, "src": "11173:6:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "11154:25:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 2771, "name": "_approve", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2740, "src": "11129:8:13", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 2777, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "11129:51:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 2778, "nodeType": "ExpressionStatement", "src": "11129:51:13" } ] } ] } } ] }, "documentation": { "id": 2741, "nodeType": "StructuredDocumentation", "src": "10499:266:13", "text": " @dev Spend `amount` form the allowance of `owner` toward `spender`.\n Does not update the allowance amount in case of infinite allowance.\n Revert if not enough allowance is available.\n Might emit an {Approval} event." }, "id": 2783, "implemented": true, "kind": "function", "modifiers": [], "name": "_spendAllowance", "nameLocation": "10779:15:13", "nodeType": "FunctionDefinition", "parameters": { "id": 2748, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2743, "mutability": "mutable", "name": "owner", "nameLocation": "10812:5:13", "nodeType": "VariableDeclaration", "scope": 2783, "src": "10804:13:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 2742, "name": "address", "nodeType": "ElementaryTypeName", "src": "10804:7:13", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 2745, "mutability": "mutable", "name": "spender", "nameLocation": "10835:7:13", "nodeType": "VariableDeclaration", "scope": 2783, "src": "10827:15:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 2744, "name": "address", "nodeType": "ElementaryTypeName", "src": "10827:7:13", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 2747, "mutability": "mutable", "name": "amount", "nameLocation": "10860:6:13", "nodeType": "VariableDeclaration", "scope": 2783, "src": "10852:14:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 2746, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "10852:7:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "10794:78:13" }, "returnParameters": { "id": 2749, "nodeType": "ParameterList", "parameters": [], "src": "10890:0:13" }, "scope": 2806, "src": "10770:441:13", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 2793, "nodeType": "Block", "src": "11914:2:13", "statements": [] }, "documentation": { "id": 2784, "nodeType": "StructuredDocumentation", "src": "11217:573:13", "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 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": 2794, "implemented": true, "kind": "function", "modifiers": [], "name": "_beforeTokenTransfer", "nameLocation": "11804:20:13", "nodeType": "FunctionDefinition", "parameters": { "id": 2791, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2786, "mutability": "mutable", "name": "from", "nameLocation": "11842:4:13", "nodeType": "VariableDeclaration", "scope": 2794, "src": "11834:12:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 2785, "name": "address", "nodeType": "ElementaryTypeName", "src": "11834:7:13", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 2788, "mutability": "mutable", "name": "to", "nameLocation": "11864:2:13", "nodeType": "VariableDeclaration", "scope": 2794, "src": "11856:10:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 2787, "name": "address", "nodeType": "ElementaryTypeName", "src": "11856:7:13", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 2790, "mutability": "mutable", "name": "amount", "nameLocation": "11884:6:13", "nodeType": "VariableDeclaration", "scope": 2794, "src": "11876:14:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 2789, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "11876:7:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "11824:72:13" }, "returnParameters": { "id": 2792, "nodeType": "ParameterList", "parameters": [], "src": "11914:0:13" }, "scope": 2806, "src": "11795:121:13", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 2804, "nodeType": "Block", "src": "12622:2:13", "statements": [] }, "documentation": { "id": 2795, "nodeType": "StructuredDocumentation", "src": "11922:577:13", "text": " @dev Hook that is called after 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 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 To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]." }, "id": 2805, "implemented": true, "kind": "function", "modifiers": [], "name": "_afterTokenTransfer", "nameLocation": "12513:19:13", "nodeType": "FunctionDefinition", "parameters": { "id": 2802, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2797, "mutability": "mutable", "name": "from", "nameLocation": "12550:4:13", "nodeType": "VariableDeclaration", "scope": 2805, "src": "12542:12:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 2796, "name": "address", "nodeType": "ElementaryTypeName", "src": "12542:7:13", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 2799, "mutability": "mutable", "name": "to", "nameLocation": "12572:2:13", "nodeType": "VariableDeclaration", "scope": 2805, "src": "12564:10:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 2798, "name": "address", "nodeType": "ElementaryTypeName", "src": "12564:7:13", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 2801, "mutability": "mutable", "name": "amount", "nameLocation": "12592:6:13", "nodeType": "VariableDeclaration", "scope": 2805, "src": "12584:14:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 2800, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "12584:7:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "12532:72:13" }, "returnParameters": { "id": 2803, "nodeType": "ParameterList", "parameters": [], "src": "12622:0:13" }, "scope": 2806, "src": "12504:120:13", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" } ], "scope": 2807, "src": "1403:11223:13", "usedErrors": [] } ], "src": "105:12522:13" }, "legacyAST": { "absolutePath": "@openzeppelin/contracts/token/ERC20/ERC20.sol", "exportedSymbols": { "Context": [ 5297 ], "ERC20": [ 2806 ], "IERC20": [ 2884 ], "IERC20Metadata": [ 3590 ] }, "id": 2807, "license": "MIT", "nodeType": "SourceUnit", "nodes": [ { "id": 2220, "literals": [ "solidity", "^", "0.8", ".0" ], "nodeType": "PragmaDirective", "src": "105:23:13" }, { "absolutePath": "@openzeppelin/contracts/token/ERC20/IERC20.sol", "file": "./IERC20.sol", "id": 2221, "nameLocation": "-1:-1:-1", "nodeType": "ImportDirective", "scope": 2807, "sourceUnit": 2885, "src": "130:22:13", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol", "file": "./extensions/IERC20Metadata.sol", "id": 2222, "nameLocation": "-1:-1:-1", "nodeType": "ImportDirective", "scope": 2807, "sourceUnit": 3591, "src": "153:41:13", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "@openzeppelin/contracts/utils/Context.sol", "file": "../../utils/Context.sol", "id": 2223, "nameLocation": "-1:-1:-1", "nodeType": "ImportDirective", "scope": 2807, "sourceUnit": 5298, "src": "195:33:13", "symbolAliases": [], "unitAlias": "" }, { "abstract": false, "baseContracts": [ { "baseName": { "id": 2225, "name": "Context", "nodeType": "IdentifierPath", "referencedDeclaration": 5297, "src": "1421:7:13" }, "id": 2226, "nodeType": "InheritanceSpecifier", "src": "1421:7:13" }, { "baseName": { "id": 2227, "name": "IERC20", "nodeType": "IdentifierPath", "referencedDeclaration": 2884, "src": "1430:6:13" }, "id": 2228, "nodeType": "InheritanceSpecifier", "src": "1430:6:13" }, { "baseName": { "id": 2229, "name": "IERC20Metadata", "nodeType": "IdentifierPath", "referencedDeclaration": 3590, "src": "1438:14:13" }, "id": 2230, "nodeType": "InheritanceSpecifier", "src": "1438:14:13" } ], "canonicalName": "ERC20", "contractDependencies": [], "contractKind": "contract", "documentation": { "id": 2224, "nodeType": "StructuredDocumentation", "src": "230:1172:13", "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 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 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": 2806, "linearizedBaseContracts": [ 2806, 3590, 2884, 5297 ], "name": "ERC20", "nameLocation": "1412:5:13", "nodeType": "ContractDefinition", "nodes": [ { "constant": false, "id": 2234, "mutability": "mutable", "name": "_balances", "nameLocation": "1495:9:13", "nodeType": "VariableDeclaration", "scope": 2806, "src": "1459:45:13", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" }, "typeName": { "id": 2233, "keyType": { "id": 2231, "name": "address", "nodeType": "ElementaryTypeName", "src": "1467:7:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Mapping", "src": "1459:27:13", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" }, "valueType": { "id": 2232, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1478:7:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } }, "visibility": "private" }, { "constant": false, "id": 2240, "mutability": "mutable", "name": "_allowances", "nameLocation": "1567:11:13", "nodeType": "VariableDeclaration", "scope": 2806, "src": "1511:67:13", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" }, "typeName": { "id": 2239, "keyType": { "id": 2235, "name": "address", "nodeType": "ElementaryTypeName", "src": "1519:7:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Mapping", "src": "1511:47:13", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" }, "valueType": { "id": 2238, "keyType": { "id": 2236, "name": "address", "nodeType": "ElementaryTypeName", "src": "1538:7:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Mapping", "src": "1530:27:13", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" }, "valueType": { "id": 2237, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1549:7:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } } }, "visibility": "private" }, { "constant": false, "id": 2242, "mutability": "mutable", "name": "_totalSupply", "nameLocation": "1601:12:13", "nodeType": "VariableDeclaration", "scope": 2806, "src": "1585:28:13", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 2241, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1585:7:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "private" }, { "constant": false, "id": 2244, "mutability": "mutable", "name": "_name", "nameLocation": "1635:5:13", "nodeType": "VariableDeclaration", "scope": 2806, "src": "1620:20:13", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_string_storage", "typeString": "string" }, "typeName": { "id": 2243, "name": "string", "nodeType": "ElementaryTypeName", "src": "1620:6:13", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "visibility": "private" }, { "constant": false, "id": 2246, "mutability": "mutable", "name": "_symbol", "nameLocation": "1661:7:13", "nodeType": "VariableDeclaration", "scope": 2806, "src": "1646:22:13", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_string_storage", "typeString": "string" }, "typeName": { "id": 2245, "name": "string", "nodeType": "ElementaryTypeName", "src": "1646:6:13", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "visibility": "private" }, { "body": { "id": 2262, "nodeType": "Block", "src": "2034:57:13", "statements": [ { "expression": { "id": 2256, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "id": 2254, "name": "_name", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2244, "src": "2044:5:13", "typeDescriptions": { "typeIdentifier": "t_string_storage", "typeString": "string storage ref" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "id": 2255, "name": "name_", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2249, "src": "2052:5:13", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string memory" } }, "src": "2044:13:13", "typeDescriptions": { "typeIdentifier": "t_string_storage", "typeString": "string storage ref" } }, "id": 2257, "nodeType": "ExpressionStatement", "src": "2044:13:13" }, { "expression": { "id": 2260, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "id": 2258, "name": "_symbol", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2246, "src": "2067:7:13", "typeDescriptions": { "typeIdentifier": "t_string_storage", "typeString": "string storage ref" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "id": 2259, "name": "symbol_", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2251, "src": "2077:7:13", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string memory" } }, "src": "2067:17:13", "typeDescriptions": { "typeIdentifier": "t_string_storage", "typeString": "string storage ref" } }, "id": 2261, "nodeType": "ExpressionStatement", "src": "2067:17:13" } ] }, "documentation": { "id": 2247, "nodeType": "StructuredDocumentation", "src": "1675:298:13", "text": " @dev Sets the values for {name} and {symbol}.\n The default 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": 2263, "implemented": true, "kind": "constructor", "modifiers": [], "name": "", "nameLocation": "-1:-1:-1", "nodeType": "FunctionDefinition", "parameters": { "id": 2252, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2249, "mutability": "mutable", "name": "name_", "nameLocation": "2004:5:13", "nodeType": "VariableDeclaration", "scope": 2263, "src": "1990:19:13", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string" }, "typeName": { "id": 2248, "name": "string", "nodeType": "ElementaryTypeName", "src": "1990:6:13", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "visibility": "internal" }, { "constant": false, "id": 2251, "mutability": "mutable", "name": "symbol_", "nameLocation": "2025:7:13", "nodeType": "VariableDeclaration", "scope": 2263, "src": "2011:21:13", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string" }, "typeName": { "id": 2250, "name": "string", "nodeType": "ElementaryTypeName", "src": "2011:6:13", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "visibility": "internal" } ], "src": "1989:44:13" }, "returnParameters": { "id": 2253, "nodeType": "ParameterList", "parameters": [], "src": "2034:0:13" }, "scope": 2806, "src": "1978:113:13", "stateMutability": "nonpayable", "virtual": false, "visibility": "public" }, { "baseFunctions": [ 3577 ], "body": { "id": 2272, "nodeType": "Block", "src": "2225:29:13", "statements": [ { "expression": { "id": 2270, "name": "_name", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2244, "src": "2242:5:13", "typeDescriptions": { "typeIdentifier": "t_string_storage", "typeString": "string storage ref" } }, "functionReturnParameters": 2269, "id": 2271, "nodeType": "Return", "src": "2235:12:13" } ] }, "documentation": { "id": 2264, "nodeType": "StructuredDocumentation", "src": "2097:54:13", "text": " @dev Returns the name of the token." }, "functionSelector": "06fdde03", "id": 2273, "implemented": true, "kind": "function", "modifiers": [], "name": "name", "nameLocation": "2165:4:13", "nodeType": "FunctionDefinition", "overrides": { "id": 2266, "nodeType": "OverrideSpecifier", "overrides": [], "src": "2192:8:13" }, "parameters": { "id": 2265, "nodeType": "ParameterList", "parameters": [], "src": "2169:2:13" }, "returnParameters": { "id": 2269, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2268, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 2273, "src": "2210:13:13", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string" }, "typeName": { "id": 2267, "name": "string", "nodeType": "ElementaryTypeName", "src": "2210:6:13", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "visibility": "internal" } ], "src": "2209:15:13" }, "scope": 2806, "src": "2156:98:13", "stateMutability": "view", "virtual": true, "visibility": "public" }, { "baseFunctions": [ 3583 ], "body": { "id": 2282, "nodeType": "Block", "src": "2438:31:13", "statements": [ { "expression": { "id": 2280, "name": "_symbol", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2246, "src": "2455:7:13", "typeDescriptions": { "typeIdentifier": "t_string_storage", "typeString": "string storage ref" } }, "functionReturnParameters": 2279, "id": 2281, "nodeType": "Return", "src": "2448:14:13" } ] }, "documentation": { "id": 2274, "nodeType": "StructuredDocumentation", "src": "2260:102:13", "text": " @dev Returns the symbol of the token, usually a shorter version of the\n name." }, "functionSelector": "95d89b41", "id": 2283, "implemented": true, "kind": "function", "modifiers": [], "name": "symbol", "nameLocation": "2376:6:13", "nodeType": "FunctionDefinition", "overrides": { "id": 2276, "nodeType": "OverrideSpecifier", "overrides": [], "src": "2405:8:13" }, "parameters": { "id": 2275, "nodeType": "ParameterList", "parameters": [], "src": "2382:2:13" }, "returnParameters": { "id": 2279, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2278, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 2283, "src": "2423:13:13", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string" }, "typeName": { "id": 2277, "name": "string", "nodeType": "ElementaryTypeName", "src": "2423:6:13", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "visibility": "internal" } ], "src": "2422:15:13" }, "scope": 2806, "src": "2367:102:13", "stateMutability": "view", "virtual": true, "visibility": "public" }, { "baseFunctions": [ 3589 ], "body": { "id": 2292, "nodeType": "Block", "src": "3158:26:13", "statements": [ { "expression": { "hexValue": "3138", "id": 2290, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "3175:2:13", "typeDescriptions": { "typeIdentifier": "t_rational_18_by_1", "typeString": "int_const 18" }, "value": "18" }, "functionReturnParameters": 2289, "id": 2291, "nodeType": "Return", "src": "3168:9:13" } ] }, "documentation": { "id": 2284, "nodeType": "StructuredDocumentation", "src": "2475:613:13", "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": 2293, "implemented": true, "kind": "function", "modifiers": [], "name": "decimals", "nameLocation": "3102:8:13", "nodeType": "FunctionDefinition", "overrides": { "id": 2286, "nodeType": "OverrideSpecifier", "overrides": [], "src": "3133:8:13" }, "parameters": { "id": 2285, "nodeType": "ParameterList", "parameters": [], "src": "3110:2:13" }, "returnParameters": { "id": 2289, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2288, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 2293, "src": "3151:5:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" }, "typeName": { "id": 2287, "name": "uint8", "nodeType": "ElementaryTypeName", "src": "3151:5:13", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "visibility": "internal" } ], "src": "3150:7:13" }, "scope": 2806, "src": "3093:91:13", "stateMutability": "view", "virtual": true, "visibility": "public" }, { "baseFunctions": [ 2815 ], "body": { "id": 2302, "nodeType": "Block", "src": "3314:36:13", "statements": [ { "expression": { "id": 2300, "name": "_totalSupply", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2242, "src": "3331:12:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "functionReturnParameters": 2299, "id": 2301, "nodeType": "Return", "src": "3324:19:13" } ] }, "documentation": { "id": 2294, "nodeType": "StructuredDocumentation", "src": "3190:49:13", "text": " @dev See {IERC20-totalSupply}." }, "functionSelector": "18160ddd", "id": 2303, "implemented": true, "kind": "function", "modifiers": [], "name": "totalSupply", "nameLocation": "3253:11:13", "nodeType": "FunctionDefinition", "overrides": { "id": 2296, "nodeType": "OverrideSpecifier", "overrides": [], "src": "3287:8:13" }, "parameters": { "id": 2295, "nodeType": "ParameterList", "parameters": [], "src": "3264:2:13" }, "returnParameters": { "id": 2299, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2298, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 2303, "src": "3305:7:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 2297, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3305:7:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "3304:9:13" }, "scope": 2806, "src": "3244:106:13", "stateMutability": "view", "virtual": true, "visibility": "public" }, { "baseFunctions": [ 2823 ], "body": { "id": 2316, "nodeType": "Block", "src": "3491:42:13", "statements": [ { "expression": { "baseExpression": { "id": 2312, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2234, "src": "3508:9:13", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 2314, "indexExpression": { "id": 2313, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2306, "src": "3518:7:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "3508:18:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "functionReturnParameters": 2311, "id": 2315, "nodeType": "Return", "src": "3501:25:13" } ] }, "documentation": { "id": 2304, "nodeType": "StructuredDocumentation", "src": "3356:47:13", "text": " @dev See {IERC20-balanceOf}." }, "functionSelector": "70a08231", "id": 2317, "implemented": true, "kind": "function", "modifiers": [], "name": "balanceOf", "nameLocation": "3417:9:13", "nodeType": "FunctionDefinition", "overrides": { "id": 2308, "nodeType": "OverrideSpecifier", "overrides": [], "src": "3464:8:13" }, "parameters": { "id": 2307, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2306, "mutability": "mutable", "name": "account", "nameLocation": "3435:7:13", "nodeType": "VariableDeclaration", "scope": 2317, "src": "3427:15:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 2305, "name": "address", "nodeType": "ElementaryTypeName", "src": "3427:7:13", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" } ], "src": "3426:17:13" }, "returnParameters": { "id": 2311, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2310, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 2317, "src": "3482:7:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 2309, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3482:7:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "3481:9:13" }, "scope": 2806, "src": "3408:125:13", "stateMutability": "view", "virtual": true, "visibility": "public" }, { "baseFunctions": [ 2833 ], "body": { "id": 2341, "nodeType": "Block", "src": "3814:104:13", "statements": [ { "assignments": [ 2329 ], "declarations": [ { "constant": false, "id": 2329, "mutability": "mutable", "name": "owner", "nameLocation": "3832:5:13", "nodeType": "VariableDeclaration", "scope": 2341, "src": "3824:13:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 2328, "name": "address", "nodeType": "ElementaryTypeName", "src": "3824:7:13", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" } ], "id": 2332, "initialValue": { "arguments": [], "expression": { "argumentTypes": [], "id": 2330, "name": "_msgSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5287, "src": "3840:10:13", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_address_$", "typeString": "function () view returns (address)" } }, "id": 2331, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3840:12:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "VariableDeclarationStatement", "src": "3824:28:13" }, { "expression": { "arguments": [ { "id": 2334, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2329, "src": "3872:5:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 2335, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2320, "src": "3879:2:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 2336, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2322, "src": "3883:6:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 2333, "name": "_transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2567, "src": "3862:9:13", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 2337, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3862:28:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 2338, "nodeType": "ExpressionStatement", "src": "3862:28:13" }, { "expression": { "hexValue": "74727565", "id": 2339, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "3907:4:13", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "functionReturnParameters": 2327, "id": 2340, "nodeType": "Return", "src": "3900:11:13" } ] }, "documentation": { "id": 2318, "nodeType": "StructuredDocumentation", "src": "3539:185:13", "text": " @dev See {IERC20-transfer}.\n Requirements:\n - `to` cannot be the zero address.\n - the caller must have a balance of at least `amount`." }, "functionSelector": "a9059cbb", "id": 2342, "implemented": true, "kind": "function", "modifiers": [], "name": "transfer", "nameLocation": "3738:8:13", "nodeType": "FunctionDefinition", "overrides": { "id": 2324, "nodeType": "OverrideSpecifier", "overrides": [], "src": "3790:8:13" }, "parameters": { "id": 2323, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2320, "mutability": "mutable", "name": "to", "nameLocation": "3755:2:13", "nodeType": "VariableDeclaration", "scope": 2342, "src": "3747:10:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 2319, "name": "address", "nodeType": "ElementaryTypeName", "src": "3747:7:13", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 2322, "mutability": "mutable", "name": "amount", "nameLocation": "3767:6:13", "nodeType": "VariableDeclaration", "scope": 2342, "src": "3759:14:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 2321, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3759:7:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "3746:28:13" }, "returnParameters": { "id": 2327, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2326, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 2342, "src": "3808:4:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 2325, "name": "bool", "nodeType": "ElementaryTypeName", "src": "3808:4:13", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "visibility": "internal" } ], "src": "3807:6:13" }, "scope": 2806, "src": "3729:189:13", "stateMutability": "nonpayable", "virtual": true, "visibility": "public" }, { "baseFunctions": [ 2843 ], "body": { "id": 2359, "nodeType": "Block", "src": "4074:51:13", "statements": [ { "expression": { "baseExpression": { "baseExpression": { "id": 2353, "name": "_allowances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2240, "src": "4091:11:13", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" } }, "id": 2355, "indexExpression": { "id": 2354, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2345, "src": "4103:5:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "4091:18:13", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 2357, "indexExpression": { "id": 2356, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2347, "src": "4110:7:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "4091:27:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "functionReturnParameters": 2352, "id": 2358, "nodeType": "Return", "src": "4084:34:13" } ] }, "documentation": { "id": 2343, "nodeType": "StructuredDocumentation", "src": "3924:47:13", "text": " @dev See {IERC20-allowance}." }, "functionSelector": "dd62ed3e", "id": 2360, "implemented": true, "kind": "function", "modifiers": [], "name": "allowance", "nameLocation": "3985:9:13", "nodeType": "FunctionDefinition", "overrides": { "id": 2349, "nodeType": "OverrideSpecifier", "overrides": [], "src": "4047:8:13" }, "parameters": { "id": 2348, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2345, "mutability": "mutable", "name": "owner", "nameLocation": "4003:5:13", "nodeType": "VariableDeclaration", "scope": 2360, "src": "3995:13:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 2344, "name": "address", "nodeType": "ElementaryTypeName", "src": "3995:7:13", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 2347, "mutability": "mutable", "name": "spender", "nameLocation": "4018:7:13", "nodeType": "VariableDeclaration", "scope": 2360, "src": "4010:15:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 2346, "name": "address", "nodeType": "ElementaryTypeName", "src": "4010:7:13", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" } ], "src": "3994:32:13" }, "returnParameters": { "id": 2352, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2351, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 2360, "src": "4065:7:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 2350, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "4065:7:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "4064:9:13" }, "scope": 2806, "src": "3976:149:13", "stateMutability": "view", "virtual": true, "visibility": "public" }, { "baseFunctions": [ 2853 ], "body": { "id": 2384, "nodeType": "Block", "src": "4522:108:13", "statements": [ { "assignments": [ 2372 ], "declarations": [ { "constant": false, "id": 2372, "mutability": "mutable", "name": "owner", "nameLocation": "4540:5:13", "nodeType": "VariableDeclaration", "scope": 2384, "src": "4532:13:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 2371, "name": "address", "nodeType": "ElementaryTypeName", "src": "4532:7:13", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" } ], "id": 2375, "initialValue": { "arguments": [], "expression": { "argumentTypes": [], "id": 2373, "name": "_msgSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5287, "src": "4548:10:13", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_address_$", "typeString": "function () view returns (address)" } }, "id": 2374, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4548:12:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "VariableDeclarationStatement", "src": "4532:28:13" }, { "expression": { "arguments": [ { "id": 2377, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2372, "src": "4579:5:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 2378, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2363, "src": "4586:7:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 2379, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2365, "src": "4595:6:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 2376, "name": "_approve", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2740, "src": "4570:8:13", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 2380, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4570:32:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 2381, "nodeType": "ExpressionStatement", "src": "4570:32:13" }, { "expression": { "hexValue": "74727565", "id": 2382, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "4619:4:13", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "functionReturnParameters": 2370, "id": 2383, "nodeType": "Return", "src": "4612:11:13" } ] }, "documentation": { "id": 2361, "nodeType": "StructuredDocumentation", "src": "4131:297:13", "text": " @dev See {IERC20-approve}.\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 Requirements:\n - `spender` cannot be the zero address." }, "functionSelector": "095ea7b3", "id": 2385, "implemented": true, "kind": "function", "modifiers": [], "name": "approve", "nameLocation": "4442:7:13", "nodeType": "FunctionDefinition", "overrides": { "id": 2367, "nodeType": "OverrideSpecifier", "overrides": [], "src": "4498:8:13" }, "parameters": { "id": 2366, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2363, "mutability": "mutable", "name": "spender", "nameLocation": "4458:7:13", "nodeType": "VariableDeclaration", "scope": 2385, "src": "4450:15:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 2362, "name": "address", "nodeType": "ElementaryTypeName", "src": "4450:7:13", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 2365, "mutability": "mutable", "name": "amount", "nameLocation": "4475:6:13", "nodeType": "VariableDeclaration", "scope": 2385, "src": "4467:14:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 2364, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "4467:7:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "4449:33:13" }, "returnParameters": { "id": 2370, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2369, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 2385, "src": "4516:4:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 2368, "name": "bool", "nodeType": "ElementaryTypeName", "src": "4516:4:13", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "visibility": "internal" } ], "src": "4515:6:13" }, "scope": 2806, "src": "4433:197:13", "stateMutability": "nonpayable", "virtual": true, "visibility": "public" }, { "baseFunctions": [ 2865 ], "body": { "id": 2417, "nodeType": "Block", "src": "5325:153:13", "statements": [ { "assignments": [ 2399 ], "declarations": [ { "constant": false, "id": 2399, "mutability": "mutable", "name": "spender", "nameLocation": "5343:7:13", "nodeType": "VariableDeclaration", "scope": 2417, "src": "5335:15:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 2398, "name": "address", "nodeType": "ElementaryTypeName", "src": "5335:7:13", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" } ], "id": 2402, "initialValue": { "arguments": [], "expression": { "argumentTypes": [], "id": 2400, "name": "_msgSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5287, "src": "5353:10:13", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_address_$", "typeString": "function () view returns (address)" } }, "id": 2401, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5353:12:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "VariableDeclarationStatement", "src": "5335:30:13" }, { "expression": { "arguments": [ { "id": 2404, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2388, "src": "5391:4:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 2405, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2399, "src": "5397:7:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 2406, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2392, "src": "5406:6:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 2403, "name": "_spendAllowance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2783, "src": "5375:15:13", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 2407, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5375:38:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 2408, "nodeType": "ExpressionStatement", "src": "5375:38:13" }, { "expression": { "arguments": [ { "id": 2410, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2388, "src": "5433:4:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 2411, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2390, "src": "5439:2:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 2412, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2392, "src": "5443:6:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 2409, "name": "_transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2567, "src": "5423:9:13", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 2413, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5423:27:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 2414, "nodeType": "ExpressionStatement", "src": "5423:27:13" }, { "expression": { "hexValue": "74727565", "id": 2415, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "5467:4:13", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "functionReturnParameters": 2397, "id": 2416, "nodeType": "Return", "src": "5460:11:13" } ] }, "documentation": { "id": 2386, "nodeType": "StructuredDocumentation", "src": "4636:551:13", "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 NOTE: Does not update the allowance if the current allowance\n is the maximum `uint256`.\n Requirements:\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`." }, "functionSelector": "23b872dd", "id": 2418, "implemented": true, "kind": "function", "modifiers": [], "name": "transferFrom", "nameLocation": "5201:12:13", "nodeType": "FunctionDefinition", "overrides": { "id": 2394, "nodeType": "OverrideSpecifier", "overrides": [], "src": "5301:8:13" }, "parameters": { "id": 2393, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2388, "mutability": "mutable", "name": "from", "nameLocation": "5231:4:13", "nodeType": "VariableDeclaration", "scope": 2418, "src": "5223:12:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 2387, "name": "address", "nodeType": "ElementaryTypeName", "src": "5223:7:13", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 2390, "mutability": "mutable", "name": "to", "nameLocation": "5253:2:13", "nodeType": "VariableDeclaration", "scope": 2418, "src": "5245:10:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 2389, "name": "address", "nodeType": "ElementaryTypeName", "src": "5245:7:13", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 2392, "mutability": "mutable", "name": "amount", "nameLocation": "5273:6:13", "nodeType": "VariableDeclaration", "scope": 2418, "src": "5265:14:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 2391, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "5265:7:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "5213:72:13" }, "returnParameters": { "id": 2397, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2396, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 2418, "src": "5319:4:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 2395, "name": "bool", "nodeType": "ElementaryTypeName", "src": "5319:4:13", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "visibility": "internal" } ], "src": "5318:6:13" }, "scope": 2806, "src": "5192:286:13", "stateMutability": "nonpayable", "virtual": true, "visibility": "public" }, { "body": { "id": 2447, "nodeType": "Block", "src": "5967:142:13", "statements": [ { "assignments": [ 2429 ], "declarations": [ { "constant": false, "id": 2429, "mutability": "mutable", "name": "owner", "nameLocation": "5985:5:13", "nodeType": "VariableDeclaration", "scope": 2447, "src": "5977:13:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 2428, "name": "address", "nodeType": "ElementaryTypeName", "src": "5977:7:13", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" } ], "id": 2432, "initialValue": { "arguments": [], "expression": { "argumentTypes": [], "id": 2430, "name": "_msgSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5287, "src": "5993:10:13", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_address_$", "typeString": "function () view returns (address)" } }, "id": 2431, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5993:12:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "VariableDeclarationStatement", "src": "5977:28:13" }, { "expression": { "arguments": [ { "id": 2434, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2429, "src": "6024:5:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 2435, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2421, "src": "6031:7:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 2442, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "baseExpression": { "baseExpression": { "id": 2436, "name": "_allowances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2240, "src": "6040:11:13", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" } }, "id": 2438, "indexExpression": { "id": 2437, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2429, "src": "6052:5:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "6040:18:13", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 2440, "indexExpression": { "id": 2439, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2421, "src": "6059:7:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "6040:27:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "+", "rightExpression": { "id": 2441, "name": "addedValue", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2423, "src": "6070:10:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "6040:40:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 2433, "name": "_approve", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2740, "src": "6015:8:13", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 2443, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6015:66:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 2444, "nodeType": "ExpressionStatement", "src": "6015:66:13" }, { "expression": { "hexValue": "74727565", "id": 2445, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "6098:4:13", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "functionReturnParameters": 2427, "id": 2446, "nodeType": "Return", "src": "6091:11:13" } ] }, "documentation": { "id": 2419, "nodeType": "StructuredDocumentation", "src": "5484:384:13", "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": 2448, "implemented": true, "kind": "function", "modifiers": [], "name": "increaseAllowance", "nameLocation": "5882:17:13", "nodeType": "FunctionDefinition", "parameters": { "id": 2424, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2421, "mutability": "mutable", "name": "spender", "nameLocation": "5908:7:13", "nodeType": "VariableDeclaration", "scope": 2448, "src": "5900:15:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 2420, "name": "address", "nodeType": "ElementaryTypeName", "src": "5900:7:13", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 2423, "mutability": "mutable", "name": "addedValue", "nameLocation": "5925:10:13", "nodeType": "VariableDeclaration", "scope": 2448, "src": "5917:18:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 2422, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "5917:7:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "5899:37:13" }, "returnParameters": { "id": 2427, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2426, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 2448, "src": "5961:4:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 2425, "name": "bool", "nodeType": "ElementaryTypeName", "src": "5961:4:13", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "visibility": "internal" } ], "src": "5960:6:13" }, "scope": 2806, "src": "5873:236:13", "stateMutability": "nonpayable", "virtual": true, "visibility": "public" }, { "body": { "id": 2489, "nodeType": "Block", "src": "6695:330:13", "statements": [ { "assignments": [ 2459 ], "declarations": [ { "constant": false, "id": 2459, "mutability": "mutable", "name": "owner", "nameLocation": "6713:5:13", "nodeType": "VariableDeclaration", "scope": 2489, "src": "6705:13:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 2458, "name": "address", "nodeType": "ElementaryTypeName", "src": "6705:7:13", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" } ], "id": 2462, "initialValue": { "arguments": [], "expression": { "argumentTypes": [], "id": 2460, "name": "_msgSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5287, "src": "6721:10:13", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_address_$", "typeString": "function () view returns (address)" } }, "id": 2461, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6721:12:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "VariableDeclarationStatement", "src": "6705:28:13" }, { "assignments": [ 2464 ], "declarations": [ { "constant": false, "id": 2464, "mutability": "mutable", "name": "currentAllowance", "nameLocation": "6751:16:13", "nodeType": "VariableDeclaration", "scope": 2489, "src": "6743:24:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 2463, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "6743:7:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "id": 2470, "initialValue": { "baseExpression": { "baseExpression": { "id": 2465, "name": "_allowances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2240, "src": "6770:11:13", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" } }, "id": 2467, "indexExpression": { "id": 2466, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2459, "src": "6782:5:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "6770:18:13", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 2469, "indexExpression": { "id": 2468, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2451, "src": "6789:7:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "6770:27:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "VariableDeclarationStatement", "src": "6743:54:13" }, { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 2474, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 2472, "name": "currentAllowance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2464, "src": "6815:16:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": ">=", "rightExpression": { "id": 2473, "name": "subtractedValue", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2453, "src": "6835:15:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "6815:35:13", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a2064656372656173656420616c6c6f77616e63652062656c6f77207a65726f", "id": 2475, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "6852:39:13", "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": 2471, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "6807:7:13", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 2476, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6807:85:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 2477, "nodeType": "ExpressionStatement", "src": "6807:85:13" }, { "id": 2486, "nodeType": "UncheckedBlock", "src": "6902:95:13", "statements": [ { "expression": { "arguments": [ { "id": 2479, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2459, "src": "6935:5:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 2480, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2451, "src": "6942:7:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 2483, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 2481, "name": "currentAllowance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2464, "src": "6951:16:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "-", "rightExpression": { "id": 2482, "name": "subtractedValue", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2453, "src": "6970:15:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "6951:34:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 2478, "name": "_approve", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2740, "src": "6926:8:13", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 2484, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6926:60:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 2485, "nodeType": "ExpressionStatement", "src": "6926:60:13" } ] }, { "expression": { "hexValue": "74727565", "id": 2487, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "7014:4:13", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "functionReturnParameters": 2457, "id": 2488, "nodeType": "Return", "src": "7007:11:13" } ] }, "documentation": { "id": 2449, "nodeType": "StructuredDocumentation", "src": "6115:476:13", "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": 2490, "implemented": true, "kind": "function", "modifiers": [], "name": "decreaseAllowance", "nameLocation": "6605:17:13", "nodeType": "FunctionDefinition", "parameters": { "id": 2454, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2451, "mutability": "mutable", "name": "spender", "nameLocation": "6631:7:13", "nodeType": "VariableDeclaration", "scope": 2490, "src": "6623:15:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 2450, "name": "address", "nodeType": "ElementaryTypeName", "src": "6623:7:13", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 2453, "mutability": "mutable", "name": "subtractedValue", "nameLocation": "6648:15:13", "nodeType": "VariableDeclaration", "scope": 2490, "src": "6640:23:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 2452, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "6640:7:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "6622:42:13" }, "returnParameters": { "id": 2457, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2456, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 2490, "src": "6689:4:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 2455, "name": "bool", "nodeType": "ElementaryTypeName", "src": "6689:4:13", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "visibility": "internal" } ], "src": "6688:6:13" }, "scope": 2806, "src": "6596:429:13", "stateMutability": "nonpayable", "virtual": true, "visibility": "public" }, { "body": { "id": 2566, "nodeType": "Block", "src": "7596:543:13", "statements": [ { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 2506, "isConstant": false, 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"Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2497, "src": "8125:6:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 2560, "name": "_afterTokenTransfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2805, "src": "8095:19:13", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 2564, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8095:37:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 2565, "nodeType": "ExpressionStatement", "src": "8095:37:13" } ] }, "documentation": { "id": 2491, "nodeType": "StructuredDocumentation", "src": "7031:452:13", "text": " @dev Moves `amount` of tokens from `sender` to `recipient`.\n This 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 - `from` cannot be the zero address.\n - `to` cannot be the zero address.\n - `from` must have a balance of at least `amount`." }, "id": 2567, "implemented": true, "kind": "function", "modifiers": [], "name": "_transfer", "nameLocation": "7497:9:13", "nodeType": "FunctionDefinition", "parameters": { "id": 2498, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2493, "mutability": "mutable", "name": "from", "nameLocation": "7524:4:13", "nodeType": "VariableDeclaration", "scope": 2567, "src": "7516:12:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 2492, "name": "address", "nodeType": "ElementaryTypeName", "src": "7516:7:13", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 2495, "mutability": "mutable", "name": "to", "nameLocation": "7546:2:13", "nodeType": "VariableDeclaration", "scope": 2567, "src": "7538:10:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 2494, "name": "address", "nodeType": "ElementaryTypeName", "src": "7538:7:13", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 2497, "mutability": "mutable", "name": "amount", "nameLocation": "7566:6:13", "nodeType": "VariableDeclaration", "scope": 2567, "src": "7558:14:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 2496, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "7558:7:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "7506:72:13" }, "returnParameters": { "id": 2499, "nodeType": "ParameterList", "parameters": [], "src": "7596:0:13" }, "scope": 2806, "src": "7488:651:13", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 2622, "nodeType": "Block", "src": "8480:324:13", "statements": [ { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 2581, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 2576, "name": 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"ElementaryTypeName", "src": "8509:7:13", "typeDescriptions": {} } }, "id": 2580, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8509:10:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "8498:21:13", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a206d696e7420746f20746865207a65726f2061646472657373", "id": 2582, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "8521:33:13", "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", 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"isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "8595:1:13", "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": 2587, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "8587:7:13", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 2586, "name": "address", "nodeType": "ElementaryTypeName", "src": "8587:7:13", "typeDescriptions": {} } }, "id": 2589, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8587:10:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 2590, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2570, "src": "8599:7:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 2591, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2572, "src": "8608:6:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 2585, "name": "_beforeTokenTransfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2794, "src": "8566:20:13", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 2592, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8566:49:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 2593, "nodeType": "ExpressionStatement", "src": "8566:49:13" }, { "expression": { "id": 2596, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "id": 2594, "name": "_totalSupply", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2242, "src": "8626:12:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "+=", "rightHandSide": { "id": 2595, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2572, "src": "8642:6:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "8626:22:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 2597, "nodeType": "ExpressionStatement", "src": "8626:22:13" }, { "expression": { "id": 2602, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "id": 2598, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2234, "src": "8658:9:13", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 2600, "indexExpression": { "id": 2599, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2570, "src": "8668:7:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "8658:18:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "+=", "rightHandSide": { "id": 2601, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2572, "src": "8680:6:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "8658:28:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 2603, "nodeType": "ExpressionStatement", "src": "8658:28:13" }, { "eventCall": { "arguments": [ { "arguments": [ { "hexValue": "30", "id": 2607, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "8718:1:13", "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": 2606, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "8710:7:13", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 2605, "name": "address", "nodeType": "ElementaryTypeName", "src": "8710:7:13", "typeDescriptions": {} } }, "id": 2608, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8710:10:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 2609, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2570, "src": "8722:7:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 2610, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2572, "src": "8731:6:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 2604, "name": "Transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2874, "src": "8701:8:13", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 2611, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8701:37:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 2612, "nodeType": "EmitStatement", "src": "8696:42:13" }, { "expression": { "arguments": [ { "arguments": [ { "hexValue": "30", "id": 2616, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "8777:1:13", "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": 2615, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "8769:7:13", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 2614, "name": "address", "nodeType": "ElementaryTypeName", "src": "8769:7:13", "typeDescriptions": {} } }, "id": 2617, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8769:10:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 2618, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2570, "src": "8781:7:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 2619, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2572, "src": "8790:6:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 2613, "name": "_afterTokenTransfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2805, "src": "8749:19:13", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 2620, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8749:48:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 2621, "nodeType": "ExpressionStatement", "src": "8749:48:13" } ] }, "documentation": { "id": 2568, "nodeType": "StructuredDocumentation", "src": "8145:265:13", "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 - `account` cannot be the zero address." }, "id": 2623, "implemented": true, "kind": "function", "modifiers": [], "name": "_mint", "nameLocation": "8424:5:13", "nodeType": "FunctionDefinition", "parameters": { "id": 2573, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2570, "mutability": "mutable", "name": "account", "nameLocation": "8438:7:13", "nodeType": "VariableDeclaration", "scope": 2623, "src": "8430:15:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 2569, "name": "address", "nodeType": "ElementaryTypeName", "src": "8430:7:13", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 2572, "mutability": "mutable", "name": "amount", "nameLocation": "8455:6:13", "nodeType": "VariableDeclaration", "scope": 2623, "src": "8447:14:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 2571, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "8447:7:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "8429:33:13" }, "returnParameters": { "id": 2574, "nodeType": "ParameterList", "parameters": [], "src": "8480:0:13" }, "scope": 2806, "src": "8415:389:13", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 2694, "nodeType": "Block", "src": "9189:511:13", "statements": [ { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 2637, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 2632, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2626, "src": "9207:7:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "arguments": [ { "hexValue": "30", "id": 2635, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9226:1:13", "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": 2634, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "9218:7:13", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 2633, "name": "address", "nodeType": "ElementaryTypeName", "src": "9218:7:13", "typeDescriptions": {} } }, "id": 2636, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9218:10:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "9207:21:13", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a206275726e2066726f6d20746865207a65726f2061646472657373", "id": 2638, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "9230:35:13", "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": 2631, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "9199:7:13", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 2639, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9199:67:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 2640, "nodeType": "ExpressionStatement", "src": "9199:67:13" }, { "expression": { "arguments": [ { "id": 2642, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2626, "src": "9298:7:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "arguments": [ { "hexValue": "30", "id": 2645, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9315:1:13", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 2644, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "9307:7:13", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 2643, "name": "address", "nodeType": "ElementaryTypeName", "src": "9307:7:13", "typeDescriptions": {} } }, "id": 2646, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9307:10:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 2647, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2628, "src": "9319:6:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 2641, "name": "_beforeTokenTransfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2794, "src": "9277:20:13", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 2648, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9277:49:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 2649, "nodeType": "ExpressionStatement", "src": "9277:49:13" }, { "assignments": [ 2651 ], "declarations": [ { "constant": false, "id": 2651, "mutability": "mutable", "name": "accountBalance", "nameLocation": "9345:14:13", "nodeType": "VariableDeclaration", "scope": 2694, "src": "9337:22:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 2650, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "9337:7:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "id": 2655, "initialValue": { "baseExpression": { "id": 2652, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2234, "src": "9362:9:13", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 2654, "indexExpression": { "id": 2653, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2626, "src": "9372:7:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "9362:18:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "VariableDeclarationStatement", "src": "9337:43:13" }, { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 2659, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 2657, "name": "accountBalance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2651, "src": "9398:14:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": ">=", "rightExpression": { "id": 2658, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2628, "src": "9416:6:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "9398:24:13", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a206275726e20616d6f756e7420657863656564732062616c616e6365", "id": 2660, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "9424:36:13", "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": 2656, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "9390:7:13", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 2661, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9390:71:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 2662, "nodeType": "ExpressionStatement", "src": "9390:71:13" }, { "id": 2671, "nodeType": "UncheckedBlock", "src": "9471:79:13", "statements": [ { "expression": { "id": 2669, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "id": 2663, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2234, "src": "9495:9:13", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 2665, "indexExpression": { "id": 2664, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2626, "src": "9505:7:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "9495:18:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 2668, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 2666, "name": "accountBalance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2651, "src": "9516:14:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "-", "rightExpression": { "id": 2667, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2628, "src": "9533:6:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "9516:23:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "9495:44:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 2670, "nodeType": "ExpressionStatement", "src": "9495:44:13" } ] }, { "expression": { "id": 2674, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "id": 2672, "name": "_totalSupply", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2242, "src": "9559:12:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "-=", "rightHandSide": { "id": 2673, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2628, "src": "9575:6:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "9559:22:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 2675, "nodeType": "ExpressionStatement", "src": "9559:22:13" }, { "eventCall": { "arguments": [ { "id": 2677, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2626, "src": "9606:7:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "arguments": [ { "hexValue": "30", "id": 2680, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9623:1:13", "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": 2679, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "9615:7:13", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 2678, "name": "address", "nodeType": "ElementaryTypeName", "src": "9615:7:13", "typeDescriptions": {} } }, "id": 2681, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9615:10:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 2682, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2628, "src": "9627:6:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 2676, "name": "Transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2874, "src": "9597:8:13", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 2683, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9597:37:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 2684, "nodeType": "EmitStatement", "src": "9592:42:13" }, { "expression": { "arguments": [ { "id": 2686, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2626, "src": "9665:7:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "arguments": [ { "hexValue": "30", "id": 2689, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9682:1:13", "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": 2688, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "9674:7:13", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 2687, "name": "address", "nodeType": "ElementaryTypeName", "src": "9674:7:13", "typeDescriptions": {} } }, "id": 2690, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9674:10:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 2691, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2628, "src": "9686:6:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 2685, "name": "_afterTokenTransfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2805, "src": "9645:19:13", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 2692, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9645:48:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 2693, "nodeType": "ExpressionStatement", "src": "9645:48:13" } ] }, "documentation": { "id": 2624, "nodeType": "StructuredDocumentation", "src": "8810:309:13", "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": 2695, "implemented": true, "kind": "function", "modifiers": [], "name": "_burn", "nameLocation": "9133:5:13", "nodeType": "FunctionDefinition", "parameters": { "id": 2629, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2626, "mutability": "mutable", "name": "account", "nameLocation": "9147:7:13", "nodeType": "VariableDeclaration", "scope": 2695, "src": "9139:15:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 2625, "name": "address", "nodeType": "ElementaryTypeName", "src": "9139:7:13", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 2628, "mutability": "mutable", "name": "amount", "nameLocation": "9164:6:13", "nodeType": "VariableDeclaration", "scope": 2695, "src": "9156:14:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 2627, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "9156:7:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "9138:33:13" }, "returnParameters": { "id": 2630, "nodeType": "ParameterList", "parameters": [], "src": "9189:0:13" }, "scope": 2806, "src": "9124:576:13", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 2739, "nodeType": "Block", "src": "10236:257:13", "statements": [ { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 2711, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 2706, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2698, "src": "10254:5:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "arguments": [ { "hexValue": "30", "id": 2709, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "10271:1:13", "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": 2708, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "10263:7:13", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 2707, "name": "address", "nodeType": "ElementaryTypeName", "src": "10263:7:13", "typeDescriptions": {} } }, "id": 2710, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10263:10:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "10254:19:13", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a20617070726f76652066726f6d20746865207a65726f2061646472657373", "id": 2712, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "10275:38:13", "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": 2705, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "10246:7:13", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 2713, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10246:68:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 2714, "nodeType": "ExpressionStatement", "src": "10246:68:13" }, { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 2721, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 2716, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2700, "src": "10332:7:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "arguments": [ { "hexValue": "30", "id": 2719, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "10351:1:13", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 2718, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "10343:7:13", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 2717, "name": "address", "nodeType": "ElementaryTypeName", "src": "10343:7:13", "typeDescriptions": {} } }, "id": 2720, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10343:10:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "10332:21:13", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a20617070726f766520746f20746865207a65726f2061646472657373", "id": 2722, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "10355:36:13", "typeDescriptions": { "typeIdentifier": "t_stringliteral_24883cc5fe64ace9d0df1893501ecb93c77180f0ff69cca79affb3c316dc8029", "typeString": "literal_string \"ERC20: approve to the zero address\"" }, "value": "ERC20: approve to the zero address" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_24883cc5fe64ace9d0df1893501ecb93c77180f0ff69cca79affb3c316dc8029", "typeString": "literal_string \"ERC20: approve to the zero address\"" } ], "id": 2715, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "10324:7:13", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 2723, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10324:68:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 2724, "nodeType": "ExpressionStatement", "src": "10324:68:13" }, { "expression": { "id": 2731, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "baseExpression": { "id": 2725, "name": "_allowances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2240, "src": "10403:11:13", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" } }, "id": 2728, "indexExpression": { "id": 2726, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2698, "src": "10415:5:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "10403:18:13", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 2729, "indexExpression": { "id": 2727, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2700, "src": "10422:7:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "10403:27:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "id": 2730, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2702, "src": "10433:6:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "10403:36:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 2732, "nodeType": "ExpressionStatement", "src": "10403:36:13" }, { "eventCall": { "arguments": [ { "id": 2734, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2698, "src": "10463:5:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 2735, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2700, "src": "10470:7:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 2736, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2702, "src": "10479:6:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 2733, "name": "Approval", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2883, "src": "10454:8:13", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 2737, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10454:32:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 2738, "nodeType": "EmitStatement", "src": "10449:37:13" } ] }, "documentation": { "id": 2696, "nodeType": "StructuredDocumentation", "src": "9706:412:13", "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": 2740, "implemented": true, "kind": "function", "modifiers": [], "name": "_approve", "nameLocation": "10132:8:13", "nodeType": "FunctionDefinition", "parameters": { "id": 2703, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2698, "mutability": "mutable", "name": "owner", "nameLocation": "10158:5:13", "nodeType": "VariableDeclaration", "scope": 2740, "src": "10150:13:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 2697, "name": "address", "nodeType": "ElementaryTypeName", "src": "10150:7:13", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 2700, "mutability": "mutable", "name": "spender", "nameLocation": "10181:7:13", "nodeType": "VariableDeclaration", "scope": 2740, "src": "10173:15:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 2699, "name": "address", "nodeType": "ElementaryTypeName", "src": "10173:7:13", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 2702, "mutability": "mutable", "name": "amount", "nameLocation": "10206:6:13", "nodeType": "VariableDeclaration", "scope": 2740, "src": "10198:14:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 2701, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "10198:7:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "10140:78:13" }, "returnParameters": { "id": 2704, "nodeType": "ParameterList", "parameters": [], "src": "10236:0:13" }, "scope": 2806, "src": "10123:370:13", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 2782, "nodeType": "Block", "src": "10890:321:13", "statements": [ { "assignments": [ 2751 ], "declarations": [ { "constant": false, "id": 2751, "mutability": "mutable", "name": "currentAllowance", "nameLocation": "10908:16:13", "nodeType": "VariableDeclaration", "scope": 2782, "src": "10900:24:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 2750, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "10900:7:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "id": 2756, "initialValue": { "arguments": [ { "id": 2753, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2743, "src": "10937:5:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 2754, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2745, "src": "10944:7:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" } ], "id": 2752, "name": "allowance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2360, "src": "10927:9:13", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_address_$_t_address_$returns$_t_uint256_$", "typeString": "function (address,address) view returns (uint256)" } }, "id": 2755, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10927:25:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "VariableDeclarationStatement", "src": "10900:52:13" }, { "condition": { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 2763, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 2757, "name": "currentAllowance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2751, "src": "10966:16:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "expression": { "arguments": [ { "id": 2760, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "10991:7:13", "typeDescriptions": { "typeIdentifier": "t_type$_t_uint256_$", "typeString": "type(uint256)" }, "typeName": { "id": 2759, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "10991:7:13", "typeDescriptions": {} } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_type$_t_uint256_$", "typeString": "type(uint256)" } ], "id": 2758, "name": "type", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4294967269, "src": "10986:4:13", "typeDescriptions": { "typeIdentifier": "t_function_metatype_pure$__$returns$__$", "typeString": "function () pure" } }, "id": 2761, "isConstant": false, "isLValue": false, "isPure": true, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10986:13:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_magic_meta_type_t_uint256", "typeString": "type(uint256)" } }, "id": 2762, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "memberName": "max", "nodeType": "MemberAccess", "src": "10986:17:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "10966:37:13", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "id": 2781, "nodeType": "IfStatement", "src": "10962:243:13", "trueBody": { "id": 2780, "nodeType": "Block", "src": "11005:200:13", "statements": [ { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 2767, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 2765, "name": "currentAllowance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2751, "src": "11027:16:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": ">=", "rightExpression": { "id": 2766, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2747, "src": "11047:6:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "11027:26:13", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a20696e73756666696369656e7420616c6c6f77616e6365", "id": 2768, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "11055:31:13", "typeDescriptions": { "typeIdentifier": "t_stringliteral_3b6607e091cba9325f958656d2b5e0622ab7dc0eac71a26ac788cb25bc19f4fe", "typeString": "literal_string \"ERC20: insufficient allowance\"" }, "value": "ERC20: insufficient allowance" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_3b6607e091cba9325f958656d2b5e0622ab7dc0eac71a26ac788cb25bc19f4fe", "typeString": "literal_string \"ERC20: insufficient allowance\"" } ], "id": 2764, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "11019:7:13", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 2769, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "11019:68:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 2770, "nodeType": "ExpressionStatement", "src": "11019:68:13" }, { "id": 2779, "nodeType": "UncheckedBlock", "src": "11101:94:13", "statements": [ { "expression": { "arguments": [ { "id": 2772, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2743, "src": "11138:5:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 2773, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2745, "src": "11145:7:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 2776, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 2774, "name": "currentAllowance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2751, "src": "11154:16:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "-", "rightExpression": { "id": 2775, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2747, "src": "11173:6:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "11154:25:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 2771, "name": "_approve", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2740, "src": "11129:8:13", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 2777, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "11129:51:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 2778, "nodeType": "ExpressionStatement", "src": "11129:51:13" } ] } ] } } ] }, "documentation": { "id": 2741, "nodeType": "StructuredDocumentation", "src": "10499:266:13", "text": " @dev Spend `amount` form the allowance of `owner` toward `spender`.\n Does not update the allowance amount in case of infinite allowance.\n Revert if not enough allowance is available.\n Might emit an {Approval} event." }, "id": 2783, "implemented": true, "kind": "function", "modifiers": [], "name": "_spendAllowance", "nameLocation": "10779:15:13", "nodeType": "FunctionDefinition", "parameters": { "id": 2748, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2743, "mutability": "mutable", "name": "owner", "nameLocation": "10812:5:13", "nodeType": "VariableDeclaration", "scope": 2783, "src": "10804:13:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 2742, "name": "address", "nodeType": "ElementaryTypeName", "src": "10804:7:13", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 2745, "mutability": "mutable", "name": "spender", "nameLocation": "10835:7:13", "nodeType": "VariableDeclaration", "scope": 2783, "src": "10827:15:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 2744, "name": "address", "nodeType": "ElementaryTypeName", "src": "10827:7:13", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 2747, "mutability": "mutable", "name": "amount", "nameLocation": "10860:6:13", "nodeType": "VariableDeclaration", "scope": 2783, "src": "10852:14:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 2746, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "10852:7:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "10794:78:13" }, "returnParameters": { "id": 2749, "nodeType": "ParameterList", "parameters": [], "src": "10890:0:13" }, "scope": 2806, "src": "10770:441:13", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 2793, "nodeType": "Block", "src": "11914:2:13", "statements": [] }, "documentation": { "id": 2784, "nodeType": "StructuredDocumentation", "src": "11217:573:13", "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 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": 2794, "implemented": true, "kind": "function", "modifiers": [], "name": "_beforeTokenTransfer", "nameLocation": "11804:20:13", "nodeType": "FunctionDefinition", "parameters": { "id": 2791, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2786, "mutability": "mutable", "name": "from", "nameLocation": "11842:4:13", "nodeType": "VariableDeclaration", "scope": 2794, "src": "11834:12:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 2785, "name": "address", "nodeType": "ElementaryTypeName", "src": "11834:7:13", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 2788, "mutability": "mutable", "name": "to", "nameLocation": "11864:2:13", "nodeType": "VariableDeclaration", "scope": 2794, "src": "11856:10:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 2787, "name": "address", "nodeType": "ElementaryTypeName", "src": "11856:7:13", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 2790, "mutability": "mutable", "name": "amount", "nameLocation": "11884:6:13", "nodeType": "VariableDeclaration", "scope": 2794, "src": "11876:14:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 2789, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "11876:7:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "11824:72:13" }, "returnParameters": { "id": 2792, "nodeType": "ParameterList", "parameters": [], "src": "11914:0:13" }, "scope": 2806, "src": "11795:121:13", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 2804, "nodeType": "Block", "src": "12622:2:13", "statements": [] }, "documentation": { "id": 2795, "nodeType": "StructuredDocumentation", "src": "11922:577:13", "text": " @dev Hook that is called after 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 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 To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]." }, "id": 2805, "implemented": true, "kind": "function", "modifiers": [], "name": "_afterTokenTransfer", "nameLocation": "12513:19:13", "nodeType": "FunctionDefinition", "parameters": { "id": 2802, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2797, "mutability": "mutable", "name": "from", "nameLocation": "12550:4:13", "nodeType": "VariableDeclaration", "scope": 2805, "src": "12542:12:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 2796, "name": "address", "nodeType": "ElementaryTypeName", "src": "12542:7:13", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 2799, "mutability": "mutable", "name": "to", "nameLocation": "12572:2:13", "nodeType": "VariableDeclaration", "scope": 2805, "src": "12564:10:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 2798, "name": "address", "nodeType": "ElementaryTypeName", "src": "12564:7:13", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 2801, "mutability": "mutable", "name": "amount", "nameLocation": "12592:6:13", "nodeType": "VariableDeclaration", "scope": 2805, "src": "12584:14:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 2800, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "12584:7:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "12532:72:13" }, "returnParameters": { "id": 2803, "nodeType": "ParameterList", "parameters": [], "src": "12622:0:13" }, "scope": 2806, "src": "12504:120:13", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" } ], "scope": 2807, "src": "1403:11223:13", "usedErrors": [] } ], "src": "105:12522:13" }, "compiler": { "name": "solc", "version": "0.8.11+commit.d7f03943.Emscripten.clang" }, "networks": {}, "schemaVersion": "3.4.4", "updatedAt": "2022-03-06T23:47:11.017Z", "devdoc": { "details": "Implementation of the {IERC20} interface. This implementation is agnostic to the way tokens are created. This means that a supply mechanism has to be added in a derived contract using {_mint}. For a generic mechanism see {ERC20PresetMinterPauser}. TIP: For a detailed writeup see our guide https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How to implement supply mechanisms]. We have followed general OpenZeppelin Contracts guidelines: functions revert instead returning `false` on failure. This behavior is nonetheless conventional and does not conflict with the expectations of ERC20 applications. Additionally, an {Approval} event is emitted on calls to {transferFrom}. This allows applications to reconstruct the allowance for all accounts just by listening to said events. Other implementations of the EIP may not emit these events, as it isn't required by the specification. Finally, the non-standard {decreaseAllowance} and {increaseAllowance} functions have been added to mitigate the well-known issues around setting allowances. See {IERC20-approve}.", "kind": "dev", "methods": { "allowance(address,address)": { "details": "See {IERC20-allowance}." }, "approve(address,uint256)": { "details": "See {IERC20-approve}. NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on `transferFrom`. This is semantically equivalent to an infinite approval. Requirements: - `spender` cannot be the zero address." }, "balanceOf(address)": { "details": "See {IERC20-balanceOf}." }, "constructor": { "details": "Sets the values for {name} and {symbol}. The default value of {decimals} is 18. To select a different value for {decimals} you should overload it. All two of these values are immutable: they can only be set once during construction." }, "decimals()": { "details": "Returns the number of decimals used to get its user representation. For example, if `decimals` equals `2`, a balance of `505` tokens should be displayed to a user as `5.05` (`505 / 10 ** 2`). Tokens usually opt for a value of 18, imitating the relationship between Ether and Wei. This is the value {ERC20} uses, unless this function is overridden; NOTE: This information is only used for _display_ purposes: it in no way affects any of the arithmetic of the contract, including {IERC20-balanceOf} and {IERC20-transfer}." }, "decreaseAllowance(address,uint256)": { "details": "Atomically decreases the allowance granted to `spender` by the caller. This is an alternative to {approve} that can be used as a mitigation for problems described in {IERC20-approve}. Emits an {Approval} event indicating the updated allowance. Requirements: - `spender` cannot be the zero address. - `spender` must have allowance for the caller of at least `subtractedValue`." }, "increaseAllowance(address,uint256)": { "details": "Atomically increases the allowance granted to `spender` by the caller. This is an alternative to {approve} that can be used as a mitigation for problems described in {IERC20-approve}. Emits an {Approval} event indicating the updated allowance. Requirements: - `spender` cannot be the zero address." }, "name()": { "details": "Returns the name of the token." }, "symbol()": { "details": "Returns the symbol of the token, usually a shorter version of the name." }, "totalSupply()": { "details": "See {IERC20-totalSupply}." }, "transfer(address,uint256)": { "details": "See {IERC20-transfer}. Requirements: - `to` cannot be the zero address. - the caller must have a balance of at least `amount`." }, "transferFrom(address,address,uint256)": { "details": "See {IERC20-transferFrom}. Emits an {Approval} event indicating the updated allowance. This is not required by the EIP. See the note at the beginning of {ERC20}. NOTE: Does not update the allowance if the current allowance is the maximum `uint256`. Requirements: - `from` and `to` cannot be the zero address. - `from` must have a balance of at least `amount`. - the caller must have allowance for ``from``'s tokens of at least `amount`." } }, "version": 1 }, "userdoc": { "kind": "user", "methods": {}, "version": 1 } }