{ "contractName": "ERC20Permit", "abi": [ { "anonymous": false, "inputs": [ { "indexed": true, "internalType": "address", "name": "owner", "type": "address" }, { "indexed": true, "internalType": "address", "name": "spender", "type": "address" }, { "indexed": false, "internalType": "uint256", "name": "value", "type": "uint256" } ], "name": "Approval", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": true, "internalType": "address", "name": "from", "type": "address" }, { "indexed": true, "internalType": "address", "name": "to", "type": "address" }, { "indexed": false, "internalType": "uint256", "name": "value", "type": "uint256" } ], "name": "Transfer", "type": "event" }, { "inputs": [ { "internalType": "address", "name": "owner", "type": "address" }, { "internalType": "address", "name": "spender", "type": "address" } ], "name": "allowance", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" } ], "stateMutability": "view", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "spender", "type": "address" }, { "internalType": "uint256", "name": "amount", "type": "uint256" } ], "name": "approve", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "stateMutability": "nonpayable", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "account", "type": "address" } ], "name": "balanceOf", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" } ], "stateMutability": "view", "type": "function" }, { "inputs": [], "name": "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" }, { "inputs": [ { "internalType": "address", "name": "owner", "type": "address" }, { "internalType": "address", "name": "spender", "type": "address" }, { "internalType": "uint256", "name": "value", "type": "uint256" }, { "internalType": "uint256", "name": "deadline", "type": "uint256" }, { "internalType": "uint8", "name": "v", "type": "uint8" }, { "internalType": "bytes32", "name": "r", "type": "bytes32" }, { "internalType": "bytes32", "name": "s", "type": "bytes32" } ], "name": "permit", "outputs": [], "stateMutability": "nonpayable", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "owner", "type": "address" } ], "name": "nonces", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" } ], "stateMutability": "view", "type": "function" }, { "inputs": [], "name": "DOMAIN_SEPARATOR", "outputs": [ { "internalType": "bytes32", "name": "", "type": "bytes32" } ], "stateMutability": "view", "type": "function" } ], "metadata": "{\"compiler\":{\"version\":\"0.8.11+commit.d7f03943\"},\"language\":\"Solidity\",\"output\":{\"abi\":[{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"owner\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"spender\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"value\",\"type\":\"uint256\"}],\"name\":\"Approval\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"from\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"value\",\"type\":\"uint256\"}],\"name\":\"Transfer\",\"type\":\"event\"},{\"inputs\":[],\"name\":\"DOMAIN_SEPARATOR\",\"outputs\":[{\"internalType\":\"bytes32\",\"name\":\"\",\"type\":\"bytes32\"}],\"stateMutability\":\"view\",\"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\":\"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\":[{\"internalType\":\"address\",\"name\":\"owner\",\"type\":\"address\"}],\"name\":\"nonces\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"owner\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"spender\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"value\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"deadline\",\"type\":\"uint256\"},{\"internalType\":\"uint8\",\"name\":\"v\",\"type\":\"uint8\"},{\"internalType\":\"bytes32\",\"name\":\"r\",\"type\":\"bytes32\"},{\"internalType\":\"bytes32\",\"name\":\"s\",\"type\":\"bytes32\"}],\"name\":\"permit\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"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 ERC20 Permit extension allowing approvals to be made via signatures, as defined in https://eips.ethereum.org/EIPS/eip-2612[EIP-2612]. Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by presenting a message signed by the account. By not relying on `{IERC20-approve}`, the token holder account doesn't need to send a transaction, and thus is not required to hold Ether at all. _Available since v3.4._\",\"kind\":\"dev\",\"methods\":{\"DOMAIN_SEPARATOR()\":{\"details\":\"See {IERC20Permit-DOMAIN_SEPARATOR}.\"},\"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\":\"Initializes the {EIP712} domain separator using the `name` parameter, and setting `version` to `\\\"1\\\"`. It's a good idea to use the same `name` that is defined as the ERC20 token name.\"},\"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.\"},\"nonces(address)\":{\"details\":\"See {IERC20Permit-nonces}.\"},\"permit(address,address,uint256,uint256,uint8,bytes32,bytes32)\":{\"details\":\"See {IERC20Permit-permit}.\"},\"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/extensions/draft-ERC20Permit.sol\":\"ERC20Permit\"},\"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/token/ERC20/extensions/draft-ERC20Permit.sol\":{\"keccak256\":\"0x8a763ef5625e97f5287c7ddd5ede434129069e15d83bf0a68ad10a5e56ccb439\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://6a3f75a7be83ce0fb636d3835e43348243d4ced9df08fb9ab6cf879ccf4d81b7\",\"dweb:/ipfs/QmauKgQQthadf1DLEbfkDWwNGcJ1doRH21EXSuacSDWGWt\"]},\"@openzeppelin/contracts/token/ERC20/extensions/draft-IERC20Permit.sol\":{\"keccak256\":\"0xf41ca991f30855bf80ffd11e9347856a517b977f0a6c2d52e6421a99b7840329\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://b2717fd2bdac99daa960a6de500754ea1b932093c946388c381da48658234b95\",\"dweb:/ipfs/QmP6QVMn6UeA3ByahyJbYQr5M6coHKBKsf3ySZSfbyA8R7\"]},\"@openzeppelin/contracts/utils/Context.sol\":{\"keccak256\":\"0xe2e337e6dde9ef6b680e07338c493ebea1b5fd09b43424112868e9cc1706bca7\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://6df0ddf21ce9f58271bdfaa85cde98b200ef242a05a3f85c2bc10a8294800a92\",\"dweb:/ipfs/QmRK2Y5Yc6BK7tGKkgsgn3aJEQGi5aakeSPZvS65PV8Xp3\"]},\"@openzeppelin/contracts/utils/Counters.sol\":{\"keccak256\":\"0xf0018c2440fbe238dd3a8732fa8e17a0f9dce84d31451dc8a32f6d62b349c9f1\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://59e1c62884d55b70f3ae5432b44bb3166ad71ae3acd19c57ab6ddc3c87c325ee\",\"dweb:/ipfs/QmezuXg5GK5oeA4F91EZhozBFekhq5TD966bHPH18cCqhu\"]},\"@openzeppelin/contracts/utils/Strings.sol\":{\"keccak256\":\"0x32c202bd28995dd20c4347b7c6467a6d3241c74c8ad3edcbb610cd9205916c45\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://8179c356adb19e70d6b31a1eedc8c5c7f0c00e669e2540f4099e3844c6074d30\",\"dweb:/ipfs/QmWFbivarEobbqhS1go64ootVuHfVohBseerYy9FTEd1W2\"]},\"@openzeppelin/contracts/utils/cryptography/ECDSA.sol\":{\"keccak256\":\"0x3c07f43e60e099b3b157243b3152722e73b80eeb7985c2cd73712828d7f7da29\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://466ffb5a6e3bd65fffd996f9287ffd240ea21588a338c6efe143d94eaed014a7\",\"dweb:/ipfs/Qmans3vvPJZcvxe9KLAPc9Xwe4TFVTJdzaQGpi62Vrhoe2\"]},\"@openzeppelin/contracts/utils/cryptography/draft-EIP712.sol\":{\"keccak256\":\"0x6688fad58b9ec0286d40fa957152e575d5d8bd4c3aa80985efdb11b44f776ae7\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://8bc00ab7f133cdaafd212a5cc6a16c8d37319721105d130c8e5af0c4e8f170ba\",\"dweb:/ipfs/QmVmf6LVMfFiEkvKYLzSv3bGHzymEW93AcUuFrNUdY3NtT\"]}},\"version\":1}", "bytecode": "0x", "deployedBytecode": "0x", "immutableReferences": {}, "generatedSources": [], "deployedGeneratedSources": [], "sourceMap": "", "deployedSourceMap": "", "source": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/draft-ERC20Permit.sol)\n\npragma solidity ^0.8.0;\n\nimport \"./draft-IERC20Permit.sol\";\nimport \"../ERC20.sol\";\nimport \"../../../utils/cryptography/draft-EIP712.sol\";\nimport \"../../../utils/cryptography/ECDSA.sol\";\nimport \"../../../utils/Counters.sol\";\n\n/**\n * @dev Implementation of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in\n * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].\n *\n * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by\n * presenting a message signed by the account. By not relying on `{IERC20-approve}`, the token holder account doesn't\n * need to send a transaction, and thus is not required to hold Ether at all.\n *\n * _Available since v3.4._\n */\nabstract contract ERC20Permit is ERC20, IERC20Permit, EIP712 {\n using Counters for Counters.Counter;\n\n mapping(address => Counters.Counter) private _nonces;\n\n // solhint-disable-next-line var-name-mixedcase\n bytes32 private immutable _PERMIT_TYPEHASH =\n keccak256(\"Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)\");\n\n /**\n * @dev Initializes the {EIP712} domain separator using the `name` parameter, and setting `version` to `\"1\"`.\n *\n * It's a good idea to use the same `name` that is defined as the ERC20 token name.\n */\n constructor(string memory name) EIP712(name, \"1\") {}\n\n /**\n * @dev See {IERC20Permit-permit}.\n */\n function permit(\n address owner,\n address spender,\n uint256 value,\n uint256 deadline,\n uint8 v,\n bytes32 r,\n bytes32 s\n ) public virtual override {\n require(block.timestamp <= deadline, \"ERC20Permit: expired deadline\");\n\n bytes32 structHash = keccak256(abi.encode(_PERMIT_TYPEHASH, owner, spender, value, _useNonce(owner), deadline));\n\n bytes32 hash = _hashTypedDataV4(structHash);\n\n address signer = ECDSA.recover(hash, v, r, s);\n require(signer == owner, \"ERC20Permit: invalid signature\");\n\n _approve(owner, spender, value);\n }\n\n /**\n * @dev See {IERC20Permit-nonces}.\n */\n function nonces(address owner) public view virtual override returns (uint256) {\n return _nonces[owner].current();\n }\n\n /**\n * @dev See {IERC20Permit-DOMAIN_SEPARATOR}.\n */\n // solhint-disable-next-line func-name-mixedcase\n function DOMAIN_SEPARATOR() external view override returns (bytes32) {\n return _domainSeparatorV4();\n }\n\n /**\n * @dev \"Consume a nonce\": return the current value and increment.\n *\n * _Available since v4.1._\n */\n function _useNonce(address owner) internal virtual returns (uint256 current) {\n Counters.Counter storage nonce = _nonces[owner];\n current = nonce.current();\n nonce.increment();\n }\n}\n", "sourcePath": "@openzeppelin/contracts/token/ERC20/extensions/draft-ERC20Permit.sol", "ast": { "absolutePath": "@openzeppelin/contracts/token/ERC20/extensions/draft-ERC20Permit.sol", "exportedSymbols": { "Context": [ 5297 ], "Counters": [ 5371 ], "ECDSA": [ 5981 ], "EIP712": [ 6228 ], "ERC20": [ 2806 ], "ERC20Permit": [ 3759 ], "IERC20": [ 2884 ], "IERC20Metadata": [ 3590 ], "IERC20Permit": [ 3795 ], "Strings": [ 5574 ] }, "id": 3760, "license": "MIT", "nodeType": "SourceUnit", "nodes": [ { "id": 3592, "literals": [ "solidity", "^", "0.8", ".0" ], "nodeType": "PragmaDirective", "src": "113:23:18" }, { "absolutePath": "@openzeppelin/contracts/token/ERC20/extensions/draft-IERC20Permit.sol", "file": "./draft-IERC20Permit.sol", "id": 3593, "nameLocation": "-1:-1:-1", "nodeType": "ImportDirective", "scope": 3760, "sourceUnit": 3796, "src": "138:34:18", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "@openzeppelin/contracts/token/ERC20/ERC20.sol", "file": "../ERC20.sol", "id": 3594, "nameLocation": "-1:-1:-1", "nodeType": "ImportDirective", "scope": 3760, "sourceUnit": 2807, "src": "173:22:18", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "@openzeppelin/contracts/utils/cryptography/draft-EIP712.sol", "file": "../../../utils/cryptography/draft-EIP712.sol", "id": 3595, "nameLocation": "-1:-1:-1", "nodeType": "ImportDirective", "scope": 3760, "sourceUnit": 6229, "src": "196:54:18", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "@openzeppelin/contracts/utils/cryptography/ECDSA.sol", "file": "../../../utils/cryptography/ECDSA.sol", "id": 3596, "nameLocation": "-1:-1:-1", "nodeType": "ImportDirective", "scope": 3760, "sourceUnit": 5982, "src": "251:47:18", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "@openzeppelin/contracts/utils/Counters.sol", "file": "../../../utils/Counters.sol", "id": 3597, "nameLocation": "-1:-1:-1", "nodeType": "ImportDirective", "scope": 3760, "sourceUnit": 5372, "src": "299:37:18", "symbolAliases": [], "unitAlias": "" }, { "abstract": true, "baseContracts": [ { "baseName": { "id": 3599, "name": "ERC20", "nodeType": "IdentifierPath", "referencedDeclaration": 2806, "src": "889:5:18" }, "id": 3600, "nodeType": "InheritanceSpecifier", "src": "889:5:18" }, { "baseName": { "id": 3601, "name": "IERC20Permit", "nodeType": "IdentifierPath", "referencedDeclaration": 3795, "src": "896:12:18" }, "id": 3602, "nodeType": "InheritanceSpecifier", "src": "896:12:18" }, { "baseName": { "id": 3603, "name": "EIP712", "nodeType": "IdentifierPath", "referencedDeclaration": 6228, "src": "910:6:18" }, "id": 3604, "nodeType": "InheritanceSpecifier", "src": "910:6:18" } ], "canonicalName": "ERC20Permit", "contractDependencies": [], "contractKind": "contract", "documentation": { "id": 3598, "nodeType": "StructuredDocumentation", "src": "338:517:18", "text": " @dev Implementation of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in\n https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].\n Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by\n presenting a message signed by the account. By not relying on `{IERC20-approve}`, the token holder account doesn't\n need to send a transaction, and thus is not required to hold Ether at all.\n _Available since v3.4._" }, "fullyImplemented": false, "id": 3759, "linearizedBaseContracts": [ 3759, 6228, 3795, 2806, 3590, 2884, 5297 ], "name": "ERC20Permit", "nameLocation": "874:11:18", "nodeType": "ContractDefinition", "nodes": [ { "id": 3608, "libraryName": { "id": 3605, "name": "Counters", "nodeType": "IdentifierPath", "referencedDeclaration": 5371, "src": "929:8:18" }, "nodeType": "UsingForDirective", "src": "923:36:18", "typeName": { "id": 3607, "nodeType": "UserDefinedTypeName", "pathNode": { "id": 3606, "name": "Counters.Counter", "nodeType": "IdentifierPath", "referencedDeclaration": 5303, "src": "942:16:18" }, "referencedDeclaration": 5303, "src": "942:16:18", "typeDescriptions": { "typeIdentifier": "t_struct$_Counter_$5303_storage_ptr", "typeString": "struct Counters.Counter" } } }, { "constant": false, "id": 3613, "mutability": "mutable", "name": "_nonces", "nameLocation": "1010:7:18", "nodeType": "VariableDeclaration", "scope": 3759, "src": "965:52:18", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_struct$_Counter_$5303_storage_$", "typeString": "mapping(address => struct Counters.Counter)" }, "typeName": { "id": 3612, "keyType": { "id": 3609, "name": "address", "nodeType": "ElementaryTypeName", "src": "973:7:18", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Mapping", "src": "965:36:18", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_struct$_Counter_$5303_storage_$", "typeString": "mapping(address => struct Counters.Counter)" }, "valueType": { "id": 3611, "nodeType": "UserDefinedTypeName", "pathNode": { "id": 3610, "name": "Counters.Counter", "nodeType": "IdentifierPath", "referencedDeclaration": 5303, "src": "984:16:18" }, "referencedDeclaration": 5303, "src": "984:16:18", "typeDescriptions": { "typeIdentifier": "t_struct$_Counter_$5303_storage_ptr", "typeString": "struct Counters.Counter" } } }, "visibility": "private" }, { "constant": false, "id": 3618, "mutability": "immutable", "name": "_PERMIT_TYPEHASH", "nameLocation": "1102:16:18", "nodeType": "VariableDeclaration", "scope": 3759, "src": "1076:148:18", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 3614, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "1076:7:18", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "value": { "arguments": [ { "hexValue": "5065726d69742861646472657373206f776e65722c61646472657373207370656e6465722c75696e743235362076616c75652c75696e74323536206e6f6e63652c75696e7432353620646561646c696e6529", "id": 3616, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "1139:84:18", "typeDescriptions": { "typeIdentifier": "t_stringliteral_6e71edae12b1b97f4d1f60370fef10105fa2faae0126114a169c64845d6126c9", "typeString": "literal_string \"Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)\"" }, "value": "Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_stringliteral_6e71edae12b1b97f4d1f60370fef10105fa2faae0126114a169c64845d6126c9", "typeString": "literal_string \"Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)\"" } ], "id": 3615, "name": "keccak256", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4294967288, "src": "1129:9:18", "typeDescriptions": { "typeIdentifier": "t_function_keccak256_pure$_t_bytes_memory_ptr_$returns$_t_bytes32_$", "typeString": "function (bytes memory) pure returns (bytes32)" } }, "id": 3617, "isConstant": false, "isLValue": false, "isPure": true, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1129:95:18", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "visibility": "private" }, { "body": { "id": 3628, "nodeType": "Block", "src": "1506:2:18", "statements": [] }, "documentation": { "id": 3619, "nodeType": "StructuredDocumentation", "src": "1231:220:18", "text": " @dev Initializes the {EIP712} domain separator using the `name` parameter, and setting `version` to `\"1\"`.\n It's a good idea to use the same `name` that is defined as the ERC20 token name." }, "id": 3629, "implemented": true, "kind": "constructor", "modifiers": [ { "arguments": [ { "id": 3624, "name": "name", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3621, "src": "1495:4:18", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string memory" } }, { "hexValue": "31", "id": 3625, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "1501:3:18", "typeDescriptions": { "typeIdentifier": "t_stringliteral_c89efdaa54c0f20c7adf612882df0950f5a951637e0307cdcb4c672f298b8bc6", "typeString": "literal_string \"1\"" }, "value": "1" } ], "id": 3626, "kind": "baseConstructorSpecifier", "modifierName": { "id": 3623, "name": "EIP712", "nodeType": "IdentifierPath", "referencedDeclaration": 6228, "src": "1488:6:18" }, "nodeType": "ModifierInvocation", "src": "1488:17:18" } ], "name": "", "nameLocation": "-1:-1:-1", "nodeType": "FunctionDefinition", "parameters": { "id": 3622, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 3621, "mutability": "mutable", "name": "name", "nameLocation": "1482:4:18", "nodeType": "VariableDeclaration", "scope": 3629, "src": "1468:18:18", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string" }, "typeName": { "id": 3620, "name": "string", "nodeType": "ElementaryTypeName", "src": "1468:6:18", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "visibility": "internal" } ], "src": "1467:20:18" }, "returnParameters": { "id": 3627, "nodeType": "ParameterList", "parameters": [], "src": "1506:0:18" }, "scope": 3759, "src": "1456:52:18", "stateMutability": "nonpayable", "virtual": false, "visibility": "internal" }, { "baseFunctions": [ 3780 ], "body": { "id": 3701, "nodeType": "Block", "src": "1767:428:18", "statements": [ { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 3652, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "expression": { "id": 3649, "name": "block", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4294967292, "src": "1785:5:18", "typeDescriptions": { "typeIdentifier": "t_magic_block", "typeString": "block" } }, "id": 3650, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "timestamp", "nodeType": "MemberAccess", "src": "1785:15:18", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "<=", "rightExpression": { "id": 3651, "name": "deadline", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3638, "src": "1804:8:18", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "1785:27:18", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332305065726d69743a206578706972656420646561646c696e65", "id": 3653, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "1814:31:18", "typeDescriptions": { "typeIdentifier": "t_stringliteral_3e89525a63fb9c966b61cf8f5305156de8420bc773a2b60828a2f32c3c5797bd", "typeString": "literal_string \"ERC20Permit: expired deadline\"" }, "value": "ERC20Permit: expired deadline" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_3e89525a63fb9c966b61cf8f5305156de8420bc773a2b60828a2f32c3c5797bd", "typeString": "literal_string \"ERC20Permit: expired deadline\"" } ], "id": 3648, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "1777:7:18", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 3654, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1777:69:18", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 3655, "nodeType": "ExpressionStatement", "src": "1777:69:18" }, { "assignments": [ 3657 ], "declarations": [ { "constant": false, "id": 3657, "mutability": "mutable", "name": "structHash", "nameLocation": "1865:10:18", "nodeType": "VariableDeclaration", "scope": 3701, "src": "1857:18:18", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 3656, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "1857:7:18", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "visibility": "internal" } ], "id": 3671, "initialValue": { "arguments": [ { "arguments": [ { "id": 3661, "name": "_PERMIT_TYPEHASH", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3618, "src": "1899:16:18", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, { "id": 3662, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3632, "src": "1917:5:18", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 3663, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3634, "src": "1924:7:18", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 3664, "name": "value", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3636, "src": "1933:5:18", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "arguments": [ { "id": 3666, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3632, "src": "1950:5:18", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" } ], "id": 3665, "name": "_useNonce", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3758, "src": "1940:9:18", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$returns$_t_uint256_$", "typeString": "function (address) returns (uint256)" } }, "id": 3667, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1940:16:18", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "id": 3668, "name": "deadline", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3638, "src": "1958:8:18", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "id": 3659, "name": "abi", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4294967295, "src": "1888:3:18", "typeDescriptions": { "typeIdentifier": "t_magic_abi", "typeString": "abi" } }, "id": 3660, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "memberName": "encode", "nodeType": "MemberAccess", "src": "1888:10:18", "typeDescriptions": { "typeIdentifier": "t_function_abiencode_pure$__$returns$_t_bytes_memory_ptr_$", "typeString": "function () pure returns (bytes memory)" } }, "id": 3669, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1888:79:18", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } ], "id": 3658, "name": "keccak256", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4294967288, "src": "1878:9:18", "typeDescriptions": { "typeIdentifier": "t_function_keccak256_pure$_t_bytes_memory_ptr_$returns$_t_bytes32_$", "typeString": "function (bytes memory) pure returns (bytes32)" } }, "id": 3670, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1878:90:18", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "nodeType": "VariableDeclarationStatement", "src": "1857:111:18" }, { "assignments": [ 3673 ], "declarations": [ { "constant": false, "id": 3673, "mutability": "mutable", "name": "hash", "nameLocation": "1987:4:18", "nodeType": "VariableDeclaration", "scope": 3701, "src": "1979:12:18", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 3672, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "1979:7:18", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "visibility": "internal" } ], "id": 3677, "initialValue": { "arguments": [ { "id": 3675, "name": "structHash", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3657, "src": "2011:10:18", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } ], "id": 3674, "name": "_hashTypedDataV4", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 6227, "src": "1994:16:18", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_bytes32_$returns$_t_bytes32_$", "typeString": "function (bytes32) view returns (bytes32)" } }, "id": 3676, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1994:28:18", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "nodeType": "VariableDeclarationStatement", "src": "1979:43:18" }, { "assignments": [ 3679 ], "declarations": [ { "constant": false, "id": 3679, "mutability": "mutable", "name": "signer", "nameLocation": "2041:6:18", "nodeType": "VariableDeclaration", "scope": 3701, "src": "2033:14:18", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 3678, "name": "address", "nodeType": "ElementaryTypeName", "src": "2033:7:18", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" } ], "id": 3687, "initialValue": { "arguments": [ { "id": 3682, "name": "hash", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3673, "src": "2064:4:18", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, { "id": 3683, "name": "v", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3640, "src": "2070:1:18", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, { "id": 3684, "name": "r", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3642, "src": "2073:1:18", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, { "id": 3685, "name": "s", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3644, "src": "2076:1:18", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, { "typeIdentifier": "t_uint8", "typeString": "uint8" }, { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } ], "expression": { "id": 3680, "name": "ECDSA", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5981, "src": "2050:5:18", "typeDescriptions": { "typeIdentifier": "t_type$_t_contract$_ECDSA_$5981_$", "typeString": "type(library ECDSA)" } }, "id": 3681, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "recover", "nodeType": "MemberAccess", "referencedDeclaration": 5921, "src": "2050:13:18", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_bytes32_$_t_uint8_$_t_bytes32_$_t_bytes32_$returns$_t_address_$", "typeString": "function (bytes32,uint8,bytes32,bytes32) pure returns (address)" } }, "id": 3686, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2050:28:18", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "VariableDeclarationStatement", "src": "2033:45:18" }, { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 3691, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 3689, "name": "signer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3679, "src": "2096:6:18", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "id": 3690, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3632, "src": "2106:5:18", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "2096:15:18", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332305065726d69743a20696e76616c6964207369676e6174757265", "id": 3692, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "2113:32:18", "typeDescriptions": { "typeIdentifier": "t_stringliteral_94ca1ab58dfda790a1782ffbb0c0a140ec51d4148dbeecc6c39e37b25ff4b124", "typeString": "literal_string \"ERC20Permit: invalid signature\"" }, "value": "ERC20Permit: invalid signature" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_94ca1ab58dfda790a1782ffbb0c0a140ec51d4148dbeecc6c39e37b25ff4b124", "typeString": "literal_string \"ERC20Permit: invalid signature\"" } ], "id": 3688, "name": "require", "nodeType": "Identifier", 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"abstract": true, "baseContracts": [ { "baseName": { "id": 3599, "name": "ERC20", "nodeType": "IdentifierPath", "referencedDeclaration": 2806, "src": "889:5:18" }, "id": 3600, "nodeType": "InheritanceSpecifier", "src": "889:5:18" }, { "baseName": { "id": 3601, "name": "IERC20Permit", "nodeType": "IdentifierPath", "referencedDeclaration": 3795, "src": "896:12:18" }, "id": 3602, "nodeType": "InheritanceSpecifier", "src": "896:12:18" }, { "baseName": { "id": 3603, "name": "EIP712", "nodeType": "IdentifierPath", "referencedDeclaration": 6228, "src": "910:6:18" }, "id": 3604, "nodeType": "InheritanceSpecifier", "src": "910:6:18" } ], "canonicalName": "ERC20Permit", "contractDependencies": [], "contractKind": "contract", "documentation": { "id": 3598, "nodeType": "StructuredDocumentation", "src": "338:517:18", "text": " @dev Implementation of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in\n https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].\n Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by\n presenting a message signed by the account. By not relying on `{IERC20-approve}`, the token holder account doesn't\n need to send a transaction, and thus is not required to hold Ether at all.\n _Available since v3.4._" }, "fullyImplemented": false, "id": 3759, "linearizedBaseContracts": [ 3759, 6228, 3795, 2806, 3590, 2884, 5297 ], "name": "ERC20Permit", "nameLocation": "874:11:18", "nodeType": "ContractDefinition", "nodes": [ { "id": 3608, "libraryName": { "id": 3605, "name": "Counters", "nodeType": "IdentifierPath", "referencedDeclaration": 5371, "src": "929:8:18" }, "nodeType": "UsingForDirective", "src": "923:36:18", "typeName": { "id": 3607, "nodeType": "UserDefinedTypeName", "pathNode": { "id": 3606, "name": "Counters.Counter", "nodeType": "IdentifierPath", "referencedDeclaration": 5303, "src": "942:16:18" }, "referencedDeclaration": 5303, "src": "942:16:18", "typeDescriptions": { "typeIdentifier": "t_struct$_Counter_$5303_storage_ptr", "typeString": "struct Counters.Counter" } } }, { "constant": false, "id": 3613, 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"src": "984:16:18", "typeDescriptions": { "typeIdentifier": "t_struct$_Counter_$5303_storage_ptr", "typeString": "struct Counters.Counter" } } }, "visibility": "private" }, { "constant": false, "id": 3618, "mutability": "immutable", "name": "_PERMIT_TYPEHASH", "nameLocation": "1102:16:18", "nodeType": "VariableDeclaration", "scope": 3759, "src": "1076:148:18", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 3614, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "1076:7:18", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "value": { "arguments": [ { "hexValue": "5065726d69742861646472657373206f776e65722c61646472657373207370656e6465722c75696e743235362076616c75652c75696e74323536206e6f6e63652c75696e7432353620646561646c696e6529", "id": 3616, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "1139:84:18", "typeDescriptions": { "typeIdentifier": "t_stringliteral_6e71edae12b1b97f4d1f60370fef10105fa2faae0126114a169c64845d6126c9", "typeString": "literal_string \"Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)\"" }, "value": "Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_stringliteral_6e71edae12b1b97f4d1f60370fef10105fa2faae0126114a169c64845d6126c9", "typeString": "literal_string \"Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)\"" } ], "id": 3615, "name": "keccak256", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4294967288, "src": "1129:9:18", "typeDescriptions": { "typeIdentifier": "t_function_keccak256_pure$_t_bytes_memory_ptr_$returns$_t_bytes32_$", "typeString": "function (bytes memory) pure returns (bytes32)" } }, "id": 3617, "isConstant": false, "isLValue": false, "isPure": true, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1129:95:18", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "visibility": "private" }, { "body": { "id": 3628, "nodeType": "Block", "src": "1506:2:18", "statements": [] }, "documentation": { "id": 3619, "nodeType": "StructuredDocumentation", "src": "1231:220:18", "text": " @dev Initializes the {EIP712} domain separator using the `name` parameter, and setting `version` to `\"1\"`.\n It's a good idea to use the same `name` that is defined as the ERC20 token name." }, "id": 3629, "implemented": true, "kind": "constructor", "modifiers": [ { "arguments": [ { "id": 3624, "name": "name", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3621, "src": "1495:4:18", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string memory" } }, { "hexValue": "31", "id": 3625, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "1501:3:18", "typeDescriptions": { "typeIdentifier": "t_stringliteral_c89efdaa54c0f20c7adf612882df0950f5a951637e0307cdcb4c672f298b8bc6", "typeString": "literal_string \"1\"" }, "value": "1" } ], "id": 3626, "kind": "baseConstructorSpecifier", "modifierName": { "id": 3623, "name": "EIP712", "nodeType": "IdentifierPath", "referencedDeclaration": 6228, "src": "1488:6:18" }, "nodeType": "ModifierInvocation", "src": "1488:17:18" } ], "name": "", "nameLocation": "-1:-1:-1", "nodeType": "FunctionDefinition", "parameters": { "id": 3622, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 3621, "mutability": "mutable", "name": "name", "nameLocation": "1482:4:18", "nodeType": "VariableDeclaration", "scope": 3629, "src": "1468:18:18", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string" }, "typeName": { "id": 3620, "name": "string", "nodeType": "ElementaryTypeName", "src": "1468:6:18", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "visibility": "internal" } ], "src": "1467:20:18" }, "returnParameters": { "id": 3627, "nodeType": "ParameterList", "parameters": [], "src": "1506:0:18" }, "scope": 3759, "src": "1456:52:18", "stateMutability": "nonpayable", "virtual": false, "visibility": "internal" }, { "baseFunctions": [ 3780 ], "body": { "id": 3701, "nodeType": "Block", "src": "1767:428:18", "statements": [ { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 3652, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "expression": { "id": 3649, "name": "block", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4294967292, "src": "1785:5:18", "typeDescriptions": { "typeIdentifier": "t_magic_block", "typeString": "block" } }, "id": 3650, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "timestamp", "nodeType": "MemberAccess", "src": "1785:15:18", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "<=", "rightExpression": { "id": 3651, "name": "deadline", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3638, "src": "1804:8:18", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "1785:27:18", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332305065726d69743a206578706972656420646561646c696e65", "id": 3653, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "1814:31:18", "typeDescriptions": { "typeIdentifier": "t_stringliteral_3e89525a63fb9c966b61cf8f5305156de8420bc773a2b60828a2f32c3c5797bd", "typeString": "literal_string \"ERC20Permit: expired deadline\"" }, "value": "ERC20Permit: expired deadline" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_3e89525a63fb9c966b61cf8f5305156de8420bc773a2b60828a2f32c3c5797bd", "typeString": "literal_string \"ERC20Permit: expired deadline\"" } ], "id": 3648, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "1777:7:18", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 3654, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1777:69:18", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 3655, "nodeType": "ExpressionStatement", "src": "1777:69:18" }, { "assignments": [ 3657 ], "declarations": [ { "constant": false, "id": 3657, "mutability": "mutable", "name": "structHash", "nameLocation": "1865:10:18", "nodeType": "VariableDeclaration", "scope": 3701, "src": "1857:18:18", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 3656, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "1857:7:18", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "visibility": "internal" } ], "id": 3671, "initialValue": { "arguments": [ { "arguments": [ { "id": 3661, "name": "_PERMIT_TYPEHASH", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3618, "src": "1899:16:18", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, { "id": 3662, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3632, "src": "1917:5:18", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 3663, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3634, "src": "1924:7:18", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 3664, "name": "value", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3636, "src": "1933:5:18", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "arguments": [ { "id": 3666, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3632, "src": "1950:5:18", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" } ], "id": 3665, "name": "_useNonce", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3758, "src": "1940:9:18", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$returns$_t_uint256_$", "typeString": "function (address) returns (uint256)" } }, "id": 3667, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1940:16:18", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "id": 3668, "name": "deadline", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3638, "src": "1958:8:18", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "id": 3659, "name": "abi", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4294967295, "src": "1888:3:18", "typeDescriptions": { "typeIdentifier": "t_magic_abi", "typeString": "abi" } }, "id": 3660, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "memberName": "encode", "nodeType": "MemberAccess", "src": "1888:10:18", "typeDescriptions": { "typeIdentifier": "t_function_abiencode_pure$__$returns$_t_bytes_memory_ptr_$", "typeString": "function () pure returns (bytes memory)" } }, "id": 3669, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1888:79:18", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } ], "id": 3658, "name": "keccak256", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4294967288, "src": "1878:9:18", "typeDescriptions": { "typeIdentifier": "t_function_keccak256_pure$_t_bytes_memory_ptr_$returns$_t_bytes32_$", "typeString": "function (bytes memory) pure returns (bytes32)" } }, "id": 3670, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1878:90:18", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "nodeType": "VariableDeclarationStatement", "src": "1857:111:18" }, { "assignments": [ 3673 ], "declarations": [ { "constant": false, "id": 3673, "mutability": "mutable", "name": "hash", "nameLocation": "1987:4:18", "nodeType": "VariableDeclaration", "scope": 3701, "src": "1979:12:18", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 3672, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "1979:7:18", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "visibility": "internal" } ], "id": 3677, "initialValue": { "arguments": [ { "id": 3675, "name": "structHash", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3657, "src": "2011:10:18", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } ], "id": 3674, "name": "_hashTypedDataV4", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 6227, "src": "1994:16:18", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_bytes32_$returns$_t_bytes32_$", "typeString": "function (bytes32) view returns (bytes32)" } }, "id": 3676, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1994:28:18", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "nodeType": "VariableDeclarationStatement", "src": "1979:43:18" }, { "assignments": [ 3679 ], "declarations": [ { "constant": false, "id": 3679, "mutability": "mutable", "name": "signer", "nameLocation": "2041:6:18", "nodeType": "VariableDeclaration", "scope": 3701, "src": "2033:14:18", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 3678, "name": "address", "nodeType": "ElementaryTypeName", "src": "2033:7:18", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" } ], "id": 3687, "initialValue": { "arguments": [ { "id": 3682, "name": "hash", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3673, "src": "2064:4:18", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, { "id": 3683, "name": "v", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3640, "src": "2070:1:18", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, { "id": 3684, "name": "r", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3642, "src": "2073:1:18", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, { "id": 3685, "name": "s", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3644, "src": "2076:1:18", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, { "typeIdentifier": "t_uint8", "typeString": "uint8" }, { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } ], "expression": { "id": 3680, "name": "ECDSA", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5981, "src": "2050:5:18", "typeDescriptions": { "typeIdentifier": "t_type$_t_contract$_ECDSA_$5981_$", "typeString": "type(library ECDSA)" } }, "id": 3681, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "recover", "nodeType": "MemberAccess", "referencedDeclaration": 5921, "src": "2050:13:18", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_bytes32_$_t_uint8_$_t_bytes32_$_t_bytes32_$returns$_t_address_$", "typeString": "function (bytes32,uint8,bytes32,bytes32) pure returns (address)" } }, "id": 3686, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2050:28:18", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "VariableDeclarationStatement", "src": "2033:45:18" }, { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 3691, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 3689, "name": "signer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3679, "src": "2096:6:18", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "id": 3690, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3632, "src": "2106:5:18", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "2096:15:18", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332305065726d69743a20696e76616c6964207369676e6174757265", "id": 3692, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "2113:32:18", "typeDescriptions": { "typeIdentifier": "t_stringliteral_94ca1ab58dfda790a1782ffbb0c0a140ec51d4148dbeecc6c39e37b25ff4b124", "typeString": "literal_string \"ERC20Permit: invalid signature\"" }, "value": "ERC20Permit: invalid signature" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_94ca1ab58dfda790a1782ffbb0c0a140ec51d4148dbeecc6c39e37b25ff4b124", "typeString": "literal_string \"ERC20Permit: invalid signature\"" } ], "id": 3688, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "2088:7:18", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 3693, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2088:58:18", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 3694, "nodeType": "ExpressionStatement", "src": "2088:58:18" }, { "expression": { "arguments": [ { "id": 3696, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3632, "src": "2166:5:18", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 3697, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3634, "src": "2173:7:18", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 3698, "name": "value", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3636, "src": "2182:5:18", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 3695, "name": "_approve", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2740, "src": "2157:8:18", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 3699, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], 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"856:2099:18", "usedErrors": [] } ], "src": "113:2843:18" }, "compiler": { "name": "solc", "version": "0.8.11+commit.d7f03943.Emscripten.clang" }, "networks": {}, "schemaVersion": "3.4.4", "updatedAt": "2022-03-06T23:47:11.032Z", "devdoc": { "details": "Implementation of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in https://eips.ethereum.org/EIPS/eip-2612[EIP-2612]. Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by presenting a message signed by the account. By not relying on `{IERC20-approve}`, the token holder account doesn't need to send a transaction, and thus is not required to hold Ether at all. _Available since v3.4._", "kind": "dev", "methods": { "DOMAIN_SEPARATOR()": { "details": "See {IERC20Permit-DOMAIN_SEPARATOR}." }, "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": "Initializes the {EIP712} domain separator using the `name` parameter, and setting `version` to `\"1\"`. It's a good idea to use the same `name` that is defined as the ERC20 token name." }, "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." }, "nonces(address)": { "details": "See {IERC20Permit-nonces}." }, "permit(address,address,uint256,uint256,uint8,bytes32,bytes32)": { "details": "See {IERC20Permit-permit}." }, "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 } }