{ "contractName": "SafeERC20", "abi": [], "metadata": "{\"compiler\":{\"version\":\"0.8.7+commit.e28d00a7\"},\"language\":\"Solidity\",\"output\":{\"abi\":[],\"devdoc\":{\"details\":\"Wrappers around ERC20 operations that throw on failure (when the token contract returns false). Tokens that return no value (and instead revert or throw on failure) are also supported, non-reverting calls are assumed to be successful. To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract, which allows you to call the safe operations as `token.safeTransfer(...)`, etc.\",\"kind\":\"dev\",\"methods\":{},\"title\":\"SafeERC20\",\"version\":1},\"userdoc\":{\"kind\":\"user\",\"methods\":{},\"version\":1}},\"settings\":{\"compilationTarget\":{\"@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol\":\"SafeERC20\"},\"evmVersion\":\"london\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\"},\"optimizer\":{\"enabled\":true,\"runs\":200},\"remappings\":[]},\"sources\":{\"@openzeppelin/contracts/token/ERC20/IERC20.sol\":{\"keccak256\":\"0x9750c6b834f7b43000631af5cc30001c5f547b3ceb3635488f140f60e897ea6b\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://5a7d5b1ef5d8d5889ad2ed89d8619c09383b80b72ab226e0fe7bde1636481e34\",\"dweb:/ipfs/QmebXWgtEfumQGBdVeM6c71McLixYXQP5Bk6kKXuoY4Bmr\"]},\"@openzeppelin/contracts/token/ERC20/extensions/draft-IERC20Permit.sol\":{\"keccak256\":\"0xf41ca991f30855bf80ffd11e9347856a517b977f0a6c2d52e6421a99b7840329\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://b2717fd2bdac99daa960a6de500754ea1b932093c946388c381da48658234b95\",\"dweb:/ipfs/QmP6QVMn6UeA3ByahyJbYQr5M6coHKBKsf3ySZSfbyA8R7\"]},\"@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol\":{\"keccak256\":\"0x032807210d1d7d218963d7355d62e021a84bf1b3339f4f50be2f63b53cccaf29\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://11756f42121f6541a35a8339ea899ee7514cfaa2e6d740625fcc844419296aa6\",\"dweb:/ipfs/QmekMuk6BY4DAjzeXr4MSbKdgoqqsZnA8JPtuyWc6CwXHf\"]},\"@openzeppelin/contracts/utils/Address.sol\":{\"keccak256\":\"0xd6153ce99bcdcce22b124f755e72553295be6abcd63804cfdffceb188b8bef10\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://35c47bece3c03caaa07fab37dd2bb3413bfbca20db7bd9895024390e0a469487\",\"dweb:/ipfs/QmPGWT2x3QHcKxqe6gRmAkdakhbaRgx3DLzcakHz5M4eXG\"]}},\"version\":1}", "bytecode": "0x60566037600b82828239805160001a607314602a57634e487b7160e01b600052600060045260246000fd5b30600052607381538281f3fe73000000000000000000000000000000000000000030146080604052600080fdfea264697066735822122085b417394b089f7b6f199106be9be65a80cd8d56595d0d49bd4b9c20802fb08e64736f6c63430008070033", "deployedBytecode": "0x73000000000000000000000000000000000000000030146080604052600080fdfea264697066735822122085b417394b089f7b6f199106be9be65a80cd8d56595d0d49bd4b9c20802fb08e64736f6c63430008070033", "immutableReferences": {}, "sourceMap": "707:3748:53:-:0;;;;;;;;;;;;;;;-1:-1:-1;;;707:3748:53;;;;;;;;;;;;;;;;;", "deployedSourceMap": "707:3748:53:-:0;;;;;;;;", "source": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.7.0) (token/ERC20/utils/SafeERC20.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../IERC20.sol\";\nimport \"../extensions/draft-IERC20Permit.sol\";\nimport \"../../../utils/Address.sol\";\n\n/**\n * @title SafeERC20\n * @dev Wrappers around ERC20 operations that throw on failure (when the token\n * contract returns false). Tokens that return no value (and instead revert or\n * throw on failure) are also supported, non-reverting calls are assumed to be\n * successful.\n * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,\n * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.\n */\nlibrary SafeERC20 {\n using Address for address;\n\n function safeTransfer(\n IERC20 token,\n address to,\n uint256 value\n ) internal {\n _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));\n }\n\n function safeTransferFrom(\n IERC20 token,\n address from,\n address to,\n uint256 value\n ) internal {\n _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));\n }\n\n /**\n * @dev Deprecated. This function has issues similar to the ones found in\n * {IERC20-approve}, and its usage is discouraged.\n *\n * Whenever possible, use {safeIncreaseAllowance} and\n * {safeDecreaseAllowance} instead.\n */\n function safeApprove(\n IERC20 token,\n address spender,\n uint256 value\n ) internal {\n // safeApprove should only be called when setting an initial allowance,\n // or when resetting it to zero. To increase and decrease it, use\n // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'\n require(\n (value == 0) || (token.allowance(address(this), spender) == 0),\n \"SafeERC20: approve from non-zero to non-zero allowance\"\n );\n _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));\n }\n\n function safeIncreaseAllowance(\n IERC20 token,\n address spender,\n uint256 value\n ) internal {\n uint256 newAllowance = token.allowance(address(this), spender) + value;\n _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));\n }\n\n function safeDecreaseAllowance(\n IERC20 token,\n address spender,\n uint256 value\n ) internal {\n unchecked {\n uint256 oldAllowance = token.allowance(address(this), spender);\n require(oldAllowance >= value, \"SafeERC20: decreased allowance below zero\");\n uint256 newAllowance = oldAllowance - value;\n _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));\n }\n }\n\n function safePermit(\n IERC20Permit token,\n address owner,\n address spender,\n uint256 value,\n uint256 deadline,\n uint8 v,\n bytes32 r,\n bytes32 s\n ) internal {\n uint256 nonceBefore = token.nonces(owner);\n token.permit(owner, spender, value, deadline, v, r, s);\n uint256 nonceAfter = token.nonces(owner);\n require(nonceAfter == nonceBefore + 1, \"SafeERC20: permit did not succeed\");\n }\n\n /**\n * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement\n * on the return value: the return value is optional (but if data is returned, it must not be false).\n * @param token The token targeted by the call.\n * @param data The call data (encoded using abi.encode or one of its variants).\n */\n function _callOptionalReturn(IERC20 token, bytes memory data) private {\n // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since\n // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that\n // the target address contains contract code and also asserts for success in the low-level call.\n\n bytes memory returndata = address(token).functionCall(data, \"SafeERC20: low-level call failed\");\n if (returndata.length > 0) {\n // Return data is optional\n require(abi.decode(returndata, (bool)), \"SafeERC20: ERC20 operation did not succeed\");\n }\n }\n}\n", "sourcePath": "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol", "ast": { "absolutePath": "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol", "exportedSymbols": { "Address": [ 11486 ], "IERC20": [ 10849 ], "IERC20Permit": [ 10910 ], "SafeERC20": [ 11191 ] }, "id": 11192, "license": "MIT", "nodeType": "SourceUnit", "nodes": [ { "id": 10912, "literals": [ "solidity", "^", "0.8", ".0" ], "nodeType": "PragmaDirective", "src": "115:23:53" }, { "absolutePath": "@openzeppelin/contracts/token/ERC20/IERC20.sol", "file": "../IERC20.sol", "id": 10913, "nameLocation": "-1:-1:-1", "nodeType": "ImportDirective", "scope": 11192, "sourceUnit": 10850, "src": "140:23:53", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "@openzeppelin/contracts/token/ERC20/extensions/draft-IERC20Permit.sol", "file": "../extensions/draft-IERC20Permit.sol", "id": 10914, "nameLocation": "-1:-1:-1", "nodeType": "ImportDirective", "scope": 11192, "sourceUnit": 10911, "src": "164:46:53", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "@openzeppelin/contracts/utils/Address.sol", "file": "../../../utils/Address.sol", "id": 10915, "nameLocation": "-1:-1:-1", "nodeType": "ImportDirective", "scope": 11192, "sourceUnit": 11487, "src": "211:36:53", "symbolAliases": [], "unitAlias": "" }, { "abstract": false, "baseContracts": [], "contractDependencies": [], "contractKind": "library", "documentation": { "id": 10916, "nodeType": "StructuredDocumentation", "src": "249:457:53", "text": " @title SafeERC20\n @dev Wrappers around ERC20 operations that throw on failure (when the token\n contract returns false). Tokens that return no value (and instead revert or\n throw on failure) are also supported, non-reverting calls are assumed to be\n successful.\n To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,\n which allows you to call the safe operations as `token.safeTransfer(...)`, etc." }, "fullyImplemented": true, "id": 11191, "linearizedBaseContracts": [ 11191 ], "name": "SafeERC20", "nameLocation": "715:9:53", "nodeType": "ContractDefinition", "nodes": [ { "id": 10919, "libraryName": { "id": 10917, "name": "Address", "nodeType": "IdentifierPath", "referencedDeclaration": 11486, "src": "737:7:53" }, "nodeType": "UsingForDirective", "src": "731:26:53", "typeName": { "id": 10918, "name": "address", "nodeType": "ElementaryTypeName", "src": "749:7:53", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } }, { "body": { "id": 10941, "nodeType": "Block", "src": "865:103:53", "statements": [ { "expression": { "arguments": [ { "id": 10930, "name": "token", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10922, "src": "895:5:53", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$10849", "typeString": "contract IERC20" } }, { "arguments": [ { "expression": { "expression": { "id": 10933, "name": "token", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10922, "src": "925:5:53", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$10849", "typeString": "contract IERC20" } }, "id": 10934, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "transfer", "nodeType": "MemberAccess", "referencedDeclaration": 10816, "src": "925:14:53", "typeDescriptions": { "typeIdentifier": "t_function_external_nonpayable$_t_address_$_t_uint256_$returns$_t_bool_$", "typeString": "function (address,uint256) external returns (bool)" } }, "id": 10935, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "selector", "nodeType": "MemberAccess", "src": "925:23:53", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, { "id": 10936, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10924, "src": "950:2:53", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 10937, "name": "value", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10926, "src": "954:5:53", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes4", "typeString": "bytes4" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "id": 10931, "name": "abi", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4294967295, "src": "902:3:53", "typeDescriptions": { "typeIdentifier": "t_magic_abi", "typeString": "abi" } }, "id": 10932, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "memberName": "encodeWithSelector", "nodeType": "MemberAccess", "src": "902:22:53", "typeDescriptions": { "typeIdentifier": "t_function_abiencodewithselector_pure$_t_bytes4_$returns$_t_bytes_memory_ptr_$", "typeString": "function (bytes4) pure returns (bytes memory)" } }, "id": 10938, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "902:58:53", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_contract$_IERC20_$10849", "typeString": "contract IERC20" }, { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } ], "id": 10929, "name": "_callOptionalReturn", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 11190, "src": "875:19:53", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_contract$_IERC20_$10849_$_t_bytes_memory_ptr_$returns$__$", "typeString": "function (contract IERC20,bytes memory)" } }, "id": 10939, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "875:86:53", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 10940, "nodeType": "ExpressionStatement", "src": "875:86:53" } ] }, "id": 10942, "implemented": true, "kind": "function", "modifiers": [], "name": "safeTransfer", "nameLocation": "772:12:53", "nodeType": "FunctionDefinition", "parameters": { "id": 10927, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 10922, "mutability": "mutable", "name": "token", "nameLocation": "801:5:53", "nodeType": "VariableDeclaration", "scope": 10942, "src": "794:12:53", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$10849", "typeString": "contract IERC20" }, "typeName": { "id": 10921, "nodeType": "UserDefinedTypeName", "pathNode": { "id": 10920, "name": "IERC20", "nodeType": "IdentifierPath", "referencedDeclaration": 10849, "src": "794:6:53" }, "referencedDeclaration": 10849, "src": "794:6:53", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$10849", "typeString": "contract IERC20" } }, "visibility": "internal" }, { "constant": false, "id": 10924, "mutability": "mutable", "name": "to", "nameLocation": "824:2:53", "nodeType": "VariableDeclaration", "scope": 10942, "src": "816:10:53", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 10923, "name": "address", "nodeType": "ElementaryTypeName", "src": "816:7:53", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 10926, "mutability": "mutable", "name": "value", "nameLocation": "844:5:53", "nodeType": "VariableDeclaration", "scope": 10942, "src": "836:13:53", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 10925, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "836:7:53", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "784:71:53" }, "returnParameters": { "id": 10928, "nodeType": "ParameterList", "parameters": [], "src": "865:0:53" }, "scope": 11191, "src": "763:205:53", "stateMutability": "nonpayable", "virtual": false, "visibility": "internal" }, { "body": { "id": 10967, "nodeType": "Block", "src": "1102:113:53", "statements": [ { "expression": { "arguments": [ { "id": 10955, "name": "token", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10945, "src": "1132:5:53", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$10849", "typeString": "contract IERC20" } }, { "arguments": [ { "expression": { "expression": { "id": 10958, "name": "token", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10945, "src": "1162:5:53", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$10849", "typeString": "contract IERC20" } }, "id": 10959, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "transferFrom", "nodeType": "MemberAccess", "referencedDeclaration": 10848, "src": "1162:18:53", "typeDescriptions": { "typeIdentifier": "t_function_external_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$_t_bool_$", "typeString": "function (address,address,uint256) external returns (bool)" } }, "id": 10960, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "selector", "nodeType": "MemberAccess", "src": "1162:27:53", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, { "id": 10961, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10947, "src": "1191:4:53", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 10962, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10949, "src": "1197:2:53", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 10963, "name": "value", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10951, "src": "1201:5:53", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes4", "typeString": "bytes4" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "id": 10956, "name": "abi", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4294967295, "src": "1139:3:53", "typeDescriptions": { "typeIdentifier": "t_magic_abi", "typeString": "abi" } }, "id": 10957, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "memberName": "encodeWithSelector", "nodeType": "MemberAccess", "src": "1139:22:53", "typeDescriptions": { "typeIdentifier": "t_function_abiencodewithselector_pure$_t_bytes4_$returns$_t_bytes_memory_ptr_$", "typeString": "function (bytes4) pure returns (bytes memory)" } }, "id": 10964, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1139:68:53", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_contract$_IERC20_$10849", "typeString": "contract IERC20" }, { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } ], "id": 10954, "name": "_callOptionalReturn", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 11190, "src": "1112:19:53", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_contract$_IERC20_$10849_$_t_bytes_memory_ptr_$returns$__$", "typeString": "function (contract IERC20,bytes memory)" } }, "id": 10965, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1112:96:53", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 10966, "nodeType": "ExpressionStatement", "src": "1112:96:53" } ] }, "id": 10968, "implemented": true, "kind": "function", "modifiers": [], "name": "safeTransferFrom", "nameLocation": "983:16:53", "nodeType": "FunctionDefinition", "parameters": { "id": 10952, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 10945, "mutability": "mutable", "name": "token", "nameLocation": "1016:5:53", "nodeType": "VariableDeclaration", "scope": 10968, "src": "1009:12:53", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$10849", "typeString": "contract IERC20" }, "typeName": { "id": 10944, "nodeType": "UserDefinedTypeName", "pathNode": { "id": 10943, "name": "IERC20", "nodeType": "IdentifierPath", "referencedDeclaration": 10849, "src": "1009:6:53" }, "referencedDeclaration": 10849, "src": "1009:6:53", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$10849", "typeString": "contract IERC20" } }, "visibility": "internal" }, { 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"typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 10951, "mutability": "mutable", "name": "value", "nameLocation": "1081:5:53", "nodeType": "VariableDeclaration", "scope": 10968, "src": "1073:13:53", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 10950, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1073:7:53", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "999:93:53" }, "returnParameters": { "id": 10953, "nodeType": "ParameterList", "parameters": [], "src": "1102:0:53" }, "scope": 11191, "src": "974:241:53", "stateMutability": "nonpayable", "virtual": false, "visibility": "internal" }, { "body": { "id": 11011, "nodeType": "Block", "src": "1581:497:53", "statements": [ { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_bool", "typeString": "bool" }, "id": 10995, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "components": [ { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 10982, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 10980, "name": "value", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10976, "src": "1830:5:53", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "hexValue": "30", "id": 10981, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "1839:1:53", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" }, "src": "1830:10:53", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } } ], "id": 10983, "isConstant": false, "isInlineArray": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "TupleExpression", "src": "1829:12:53", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "nodeType": "BinaryOperation", "operator": "||", "rightExpression": { "components": [ { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 10993, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "arguments": [ { "arguments": [ { "id": 10988, "name": "this", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4294967268, "src": "1870:4:53", "typeDescriptions": { "typeIdentifier": "t_contract$_SafeERC20_$11191", "typeString": "library SafeERC20" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_contract$_SafeERC20_$11191", "typeString": "library SafeERC20" } ], "id": 10987, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "1862:7:53", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 10986, "name": "address", "nodeType": "ElementaryTypeName", "src": "1862:7:53", "typeDescriptions": {} } }, "id": 10989, "isConstant": false, "isLValue": false, "isPure": false, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1862:13:53", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 10990, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10974, "src": "1877:7:53", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" } ], "expression": { "id": 10984, "name": "token", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10972, "src": "1846:5:53", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$10849", "typeString": "contract IERC20" } }, "id": 10985, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "allowance", "nodeType": "MemberAccess", "referencedDeclaration": 10826, "src": "1846:15:53", "typeDescriptions": { "typeIdentifier": "t_function_external_view$_t_address_$_t_address_$returns$_t_uint256_$", "typeString": "function (address,address) view external returns (uint256)" } }, "id": 10991, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1846:39:53", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "hexValue": "30", "id": 10992, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "1889:1:53", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" }, "src": "1846:44:53", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } } ], "id": 10994, "isConstant": false, "isInlineArray": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "TupleExpression", "src": "1845:46:53", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "src": "1829:62:53", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "5361666545524332303a20617070726f76652066726f6d206e6f6e2d7a65726f20746f206e6f6e2d7a65726f20616c6c6f77616e6365", "id": 10996, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "1905:56:53", "typeDescriptions": { "typeIdentifier": "t_stringliteral_ef945ddb1bfdc0da870feb4560d868b047642b4ac7f2fb7f8b7c51cb4a411e25", "typeString": "literal_string \"SafeERC20: approve from non-zero to non-zero allowance\"" }, "value": "SafeERC20: approve from non-zero to non-zero allowance" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_ef945ddb1bfdc0da870feb4560d868b047642b4ac7f2fb7f8b7c51cb4a411e25", "typeString": "literal_string \"SafeERC20: approve from non-zero to non-zero allowance\"" } ], "id": 10979, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "1808:7:53", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 10997, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1808:163:53", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 10998, "nodeType": "ExpressionStatement", "src": "1808:163:53" }, { "expression": { "arguments": [ { "id": 11000, "name": "token", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10972, "src": "2001:5:53", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$10849", "typeString": "contract IERC20" } }, { "arguments": [ { "expression": { "expression": { "id": 11003, "name": "token", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10972, "src": "2031:5:53", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$10849", "typeString": "contract IERC20" } }, "id": 11004, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "approve", "nodeType": "MemberAccess", "referencedDeclaration": 10836, "src": "2031:13:53", "typeDescriptions": { "typeIdentifier": "t_function_external_nonpayable$_t_address_$_t_uint256_$returns$_t_bool_$", "typeString": "function (address,uint256) external returns (bool)" } }, "id": 11005, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "selector", "nodeType": "MemberAccess", "src": "2031:22:53", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, { "id": 11006, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10974, "src": "2055:7:53", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 11007, "name": "value", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10976, "src": "2064:5:53", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes4", "typeString": "bytes4" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "id": 11001, "name": "abi", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4294967295, "src": "2008:3:53", "typeDescriptions": { "typeIdentifier": "t_magic_abi", "typeString": "abi" } }, "id": 11002, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "memberName": "encodeWithSelector", "nodeType": "MemberAccess", "src": "2008:22:53", "typeDescriptions": { "typeIdentifier": "t_function_abiencodewithselector_pure$_t_bytes4_$returns$_t_bytes_memory_ptr_$", "typeString": "function (bytes4) pure returns (bytes memory)" } }, "id": 11008, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2008:62:53", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_contract$_IERC20_$10849", "typeString": "contract IERC20" }, { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } ], "id": 10999, "name": "_callOptionalReturn", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 11190, "src": "1981:19:53", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_contract$_IERC20_$10849_$_t_bytes_memory_ptr_$returns$__$", "typeString": "function (contract IERC20,bytes memory)" } }, "id": 11009, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1981:90:53", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 11010, "nodeType": "ExpressionStatement", "src": "1981:90:53" } ] }, "documentation": { "id": 10969, "nodeType": "StructuredDocumentation", "src": "1221:249:53", "text": " @dev Deprecated. This function has issues similar to the ones found in\n {IERC20-approve}, and its usage is discouraged.\n Whenever possible, use {safeIncreaseAllowance} and\n {safeDecreaseAllowance} instead." }, "id": 11012, "implemented": true, "kind": "function", "modifiers": [], "name": "safeApprove", "nameLocation": "1484:11:53", "nodeType": "FunctionDefinition", "parameters": { "id": 10977, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 10972, "mutability": "mutable", "name": "token", "nameLocation": "1512:5:53", "nodeType": "VariableDeclaration", "scope": 11012, "src": "1505:12:53", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$10849", "typeString": "contract IERC20" }, "typeName": { "id": 10971, "nodeType": "UserDefinedTypeName", "pathNode": { "id": 10970, "name": "IERC20", "nodeType": "IdentifierPath", "referencedDeclaration": 10849, "src": "1505:6:53" }, "referencedDeclaration": 10849, "src": "1505:6:53", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$10849", "typeString": "contract IERC20" } }, "visibility": "internal" }, { "constant": false, "id": 10974, "mutability": "mutable", "name": "spender", "nameLocation": "1535:7:53", "nodeType": "VariableDeclaration", "scope": 11012, "src": "1527:15:53", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 10973, "name": "address", "nodeType": "ElementaryTypeName", "src": "1527:7:53", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 10976, "mutability": "mutable", "name": "value", "nameLocation": "1560:5:53", "nodeType": "VariableDeclaration", "scope": 11012, "src": "1552:13:53", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 10975, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1552:7:53", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "1495:76:53" }, "returnParameters": { "id": 10978, "nodeType": "ParameterList", "parameters": [], "src": "1581:0:53" }, "scope": 11191, "src": "1475:603:53", "stateMutability": "nonpayable", "virtual": false, "visibility": "internal" }, { "body": { "id": 11047, "nodeType": "Block", "src": "2200:194:53", "statements": [ { "assignments": [ 11023 ], "declarations": [ { "constant": false, "id": 11023, "mutability": "mutable", "name": "newAllowance", "nameLocation": "2218:12:53", "nodeType": "VariableDeclaration", "scope": 11047, "src": "2210:20:53", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 11022, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "2210:7:53", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "id": 11034, "initialValue": { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 11033, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "arguments": [ { "arguments": [ { "id": 11028, "name": "this", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4294967268, "src": "2257:4:53", "typeDescriptions": { "typeIdentifier": "t_contract$_SafeERC20_$11191", "typeString": "library SafeERC20" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_contract$_SafeERC20_$11191", "typeString": "library SafeERC20" } ], "id": 11027, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "2249:7:53", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 11026, "name": "address", "nodeType": "ElementaryTypeName", "src": "2249:7:53", "typeDescriptions": {} } }, "id": 11029, "isConstant": false, "isLValue": false, "isPure": false, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2249:13:53", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 11030, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 11017, "src": "2264:7:53", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" } ], "expression": { "id": 11024, "name": "token", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 11015, "src": "2233:5:53", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$10849", "typeString": "contract IERC20" } }, "id": 11025, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "allowance", "nodeType": "MemberAccess", "referencedDeclaration": 10826, "src": "2233:15:53", "typeDescriptions": { "typeIdentifier": "t_function_external_view$_t_address_$_t_address_$returns$_t_uint256_$", "typeString": "function (address,address) view external returns (uint256)" } }, "id": 11031, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2233:39:53", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "+", "rightExpression": { "id": 11032, "name": "value", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 11019, "src": "2275:5:53", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "2233:47:53", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "VariableDeclarationStatement", "src": "2210:70:53" }, { "expression": { "arguments": [ { "id": 11036, "name": "token", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 11015, "src": "2310:5:53", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$10849", "typeString": "contract IERC20" } }, { "arguments": [ { "expression": { "expression": { "id": 11039, "name": "token", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 11015, "src": "2340:5:53", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$10849", "typeString": "contract IERC20" } }, "id": 11040, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "approve", "nodeType": "MemberAccess", "referencedDeclaration": 10836, "src": "2340:13:53", "typeDescriptions": { "typeIdentifier": "t_function_external_nonpayable$_t_address_$_t_uint256_$returns$_t_bool_$", "typeString": "function (address,uint256) external returns (bool)" } }, "id": 11041, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "selector", "nodeType": "MemberAccess", "src": "2340:22:53", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, { "id": 11042, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 11017, "src": "2364:7:53", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 11043, "name": "newAllowance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 11023, "src": "2373:12:53", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes4", "typeString": "bytes4" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "id": 11037, "name": "abi", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4294967295, "src": "2317:3:53", "typeDescriptions": { "typeIdentifier": "t_magic_abi", "typeString": "abi" } }, "id": 11038, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "memberName": "encodeWithSelector", "nodeType": "MemberAccess", "src": "2317:22:53", "typeDescriptions": { "typeIdentifier": "t_function_abiencodewithselector_pure$_t_bytes4_$returns$_t_bytes_memory_ptr_$", "typeString": "function (bytes4) pure returns (bytes memory)" } }, "id": 11044, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2317:69:53", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_contract$_IERC20_$10849", "typeString": "contract IERC20" }, { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } ], "id": 11035, "name": "_callOptionalReturn", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 11190, "src": "2290:19:53", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_contract$_IERC20_$10849_$_t_bytes_memory_ptr_$returns$__$", "typeString": "function (contract IERC20,bytes memory)" } }, "id": 11045, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2290:97:53", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 11046, "nodeType": "ExpressionStatement", "src": "2290:97:53" } ] }, "id": 11048, "implemented": true, "kind": "function", "modifiers": [], "name": "safeIncreaseAllowance", "nameLocation": "2093:21:53", "nodeType": "FunctionDefinition", "parameters": { "id": 11020, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 11015, "mutability": "mutable", "name": "token", "nameLocation": "2131:5:53", "nodeType": "VariableDeclaration", "scope": 11048, "src": "2124:12:53", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$10849", "typeString": "contract IERC20" }, "typeName": { "id": 11014, "nodeType": "UserDefinedTypeName", "pathNode": { "id": 11013, "name": "IERC20", "nodeType": "IdentifierPath", "referencedDeclaration": 10849, "src": "2124:6:53" }, "referencedDeclaration": 10849, "src": "2124:6:53", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$10849", "typeString": "contract IERC20" } }, "visibility": "internal" }, { "constant": false, "id": 11017, "mutability": "mutable", "name": "spender", "nameLocation": "2154:7:53", "nodeType": "VariableDeclaration", "scope": 11048, "src": "2146:15:53", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 11016, "name": "address", "nodeType": "ElementaryTypeName", "src": "2146:7:53", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 11019, "mutability": "mutable", "name": "value", "nameLocation": "2179:5:53", "nodeType": "VariableDeclaration", "scope": 11048, "src": "2171:13:53", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 11018, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "2171:7:53", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "2114:76:53" }, "returnParameters": { "id": 11021, "nodeType": "ParameterList", "parameters": [], "src": "2200:0:53" }, "scope": 11191, "src": "2084:310:53", "stateMutability": "nonpayable", "virtual": false, "visibility": "internal" }, { "body": { "id": 11095, "nodeType": "Block", "src": "2516:370:53", "statements": [ { "id": 11094, "nodeType": "UncheckedBlock", "src": "2526:354:53", "statements": [ { "assignments": [ 11059 ], "declarations": [ { "constant": false, "id": 11059, "mutability": "mutable", "name": "oldAllowance", "nameLocation": "2558:12:53", "nodeType": "VariableDeclaration", "scope": 11094, "src": "2550:20:53", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 11058, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "2550:7:53", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "id": 11068, 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"t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 11149, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3282:75:53", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 11150, "nodeType": "ExpressionStatement", "src": "3282:75:53" } ] }, "id": 11152, "implemented": true, "kind": "function", "modifiers": [], "name": "safePermit", "nameLocation": "2901:10:53", "nodeType": "FunctionDefinition", "parameters": { "id": 11114, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 11099, "mutability": "mutable", "name": "token", "nameLocation": "2934:5:53", "nodeType": "VariableDeclaration", "scope": 11152, "src": "2921:18:53", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20Permit_$10910", "typeString": "contract IERC20Permit" }, "typeName": { "id": 11098, "nodeType": "UserDefinedTypeName", "pathNode": { "id": 11097, "name": "IERC20Permit", "nodeType": "IdentifierPath", "referencedDeclaration": 10910, "src": "2921:12:53" }, "referencedDeclaration": 10910, "src": "2921:12:53", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20Permit_$10910", "typeString": "contract IERC20Permit" } }, "visibility": "internal" }, { "constant": false, "id": 11101, "mutability": "mutable", "name": "owner", "nameLocation": "2957:5:53", "nodeType": "VariableDeclaration", "scope": 11152, "src": "2949:13:53", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 11100, "name": "address", "nodeType": "ElementaryTypeName", "src": "2949:7:53", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 11103, "mutability": "mutable", "name": "spender", "nameLocation": "2980:7:53", "nodeType": "VariableDeclaration", "scope": 11152, "src": "2972:15:53", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 11102, "name": "address", "nodeType": "ElementaryTypeName", "src": "2972:7:53", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 11105, "mutability": "mutable", "name": "value", "nameLocation": "3005:5:53", "nodeType": "VariableDeclaration", "scope": 11152, "src": "2997:13:53", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 11104, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "2997:7:53", 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"name": "bytes32", "nodeType": "ElementaryTypeName", "src": "3082:7:53", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "visibility": "internal" } ], "src": "2911:186:53" }, "returnParameters": { "id": 11115, "nodeType": "ParameterList", "parameters": [], "src": "3107:0:53" }, "scope": 11191, "src": "2892:472:53", "stateMutability": "nonpayable", "virtual": false, "visibility": "internal" }, { "body": { "id": 11189, "nodeType": "Block", "src": "3817:636:53", "statements": [ { "assignments": [ 11162 ], "declarations": [ { "constant": false, "id": 11162, "mutability": "mutable", "name": "returndata", "nameLocation": "4179:10:53", "nodeType": "VariableDeclaration", "scope": 11189, "src": "4166:23:53", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 11161, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "4166:5:53", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "visibility": "internal" } ], "id": 11171, "initialValue": { "arguments": [ { "id": 11168, "name": "data", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 11158, "src": "4220:4:53", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } }, { "hexValue": "5361666545524332303a206c6f772d6c6576656c2063616c6c206661696c6564", "id": 11169, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "4226:34:53", "typeDescriptions": { "typeIdentifier": "t_stringliteral_47fb62c2c272651d2f0f342bac006756b8ba07f21cc5cb87e0fbb9d50c0c585b", "typeString": "literal_string \"SafeERC20: low-level call failed\"" }, "value": "SafeERC20: low-level call failed" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" }, { "typeIdentifier": "t_stringliteral_47fb62c2c272651d2f0f342bac006756b8ba07f21cc5cb87e0fbb9d50c0c585b", "typeString": "literal_string \"SafeERC20: low-level call failed\"" } ], "expression": { "arguments": [ { "id": 11165, "name": "token", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 11156, "src": "4200:5:53", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$10849", "typeString": "contract IERC20" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_contract$_IERC20_$10849", "typeString": "contract IERC20" } ], "id": 11164, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "4192:7:53", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 11163, "name": "address", "nodeType": "ElementaryTypeName", "src": "4192:7:53", "typeDescriptions": {} } }, "id": 11166, "isConstant": false, "isLValue": false, "isPure": false, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4192:14:53", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "id": 11167, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "functionCall", "nodeType": "MemberAccess", "referencedDeclaration": 11280, "src": "4192:27:53", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_bytes_memory_ptr_$_t_string_memory_ptr_$returns$_t_bytes_memory_ptr_$bound_to$_t_address_$", "typeString": "function (address,bytes memory,string memory) returns (bytes memory)" } }, "id": 11170, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4192:69:53", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } }, "nodeType": "VariableDeclarationStatement", "src": "4166:95:53" }, { "condition": { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 11175, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "expression": { "id": 11172, "name": "returndata", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 11162, "src": "4275:10:53", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } }, "id": 11173, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "length", "nodeType": "MemberAccess", "src": "4275:17:53", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": ">", "rightExpression": { "hexValue": "30", "id": 11174, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "4295:1:53", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" }, "src": "4275:21:53", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "id": 11188, "nodeType": "IfStatement", "src": "4271:176:53", "trueBody": { "id": 11187, "nodeType": "Block", "src": "4298:149:53", "statements": [ { "expression": { "arguments": [ { "arguments": [ { "id": 11179, "name": "returndata", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 11162, "src": "4370:10:53", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } }, { "components": [ { "id": 11181, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "4383:4:53", "typeDescriptions": { "typeIdentifier": "t_type$_t_bool_$", "typeString": "type(bool)" }, "typeName": { "id": 11180, "name": "bool", "nodeType": "ElementaryTypeName", "src": "4383:4:53", "typeDescriptions": {} } } ], "id": 11182, "isConstant": false, "isInlineArray": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "TupleExpression", "src": "4382:6:53", "typeDescriptions": { "typeIdentifier": "t_type$_t_bool_$", "typeString": "type(bool)" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" }, { "typeIdentifier": "t_type$_t_bool_$", "typeString": "type(bool)" } ], "expression": { "id": 11177, "name": "abi", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4294967295, "src": "4359:3:53", "typeDescriptions": { "typeIdentifier": "t_magic_abi", "typeString": "abi" } }, "id": 11178, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "memberName": "decode", "nodeType": "MemberAccess", "src": "4359:10:53", "typeDescriptions": { "typeIdentifier": "t_function_abidecode_pure$__$returns$__$", "typeString": "function () pure" } }, "id": 11183, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4359:30:53", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "5361666545524332303a204552433230206f7065726174696f6e20646964206e6f742073756363656564", "id": 11184, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "4391:44:53", "typeDescriptions": { "typeIdentifier": "t_stringliteral_e11ad79d1e4a7f2e5f376964cb99e8e8f7904e3fc16a109f7a7ecb9aa7956dcd", "typeString": "literal_string \"SafeERC20: ERC20 operation did not succeed\"" }, "value": "SafeERC20: ERC20 operation did not succeed" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_e11ad79d1e4a7f2e5f376964cb99e8e8f7904e3fc16a109f7a7ecb9aa7956dcd", "typeString": "literal_string \"SafeERC20: ERC20 operation did not succeed\"" } ], "id": 11176, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "4351:7:53", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 11185, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4351:85:53", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 11186, "nodeType": "ExpressionStatement", "src": "4351:85:53" } ] } } ] }, "documentation": { "id": 11153, "nodeType": "StructuredDocumentation", "src": "3370:372:53", "text": " @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement\n on the return value: the return value is optional (but if data is returned, it must not be false).\n @param token The token targeted by the call.\n @param data The call data (encoded using abi.encode or one of its variants)." }, "id": 11190, "implemented": true, "kind": "function", "modifiers": [], "name": "_callOptionalReturn", "nameLocation": "3756:19:53", "nodeType": "FunctionDefinition", "parameters": { "id": 11159, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 11156, "mutability": "mutable", "name": "token", "nameLocation": "3783:5:53", "nodeType": "VariableDeclaration", "scope": 11190, "src": "3776:12:53", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$10849", "typeString": "contract IERC20" }, "typeName": { "id": 11155, "nodeType": "UserDefinedTypeName", "pathNode": { "id": 11154, "name": "IERC20", "nodeType": "IdentifierPath", "referencedDeclaration": 10849, "src": "3776:6:53" }, "referencedDeclaration": 10849, "src": "3776:6:53", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$10849", "typeString": "contract IERC20" } }, "visibility": "internal" }, { "constant": false, "id": 11158, "mutability": "mutable", "name": "data", "nameLocation": "3803:4:53", "nodeType": "VariableDeclaration", "scope": 11190, "src": "3790:17:53", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 11157, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "3790:5:53", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "visibility": "internal" } ], "src": "3775:33:53" }, "returnParameters": { "id": 11160, "nodeType": "ParameterList", "parameters": [], "src": "3817:0:53" }, "scope": 11191, "src": "3747:706:53", "stateMutability": "nonpayable", "virtual": false, "visibility": "private" } ], "scope": 11192, "src": "707:3748:53", "usedErrors": [] } ], "src": "115:4341:53" }, "legacyAST": { "absolutePath": "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol", "exportedSymbols": { "Address": [ 11486 ], "IERC20": [ 10849 ], "IERC20Permit": [ 10910 ], "SafeERC20": [ 11191 ] }, "id": 11192, "license": "MIT", "nodeType": "SourceUnit", "nodes": [ { "id": 10912, "literals": [ "solidity", "^", "0.8", ".0" ], "nodeType": "PragmaDirective", "src": "115:23:53" }, { "absolutePath": "@openzeppelin/contracts/token/ERC20/IERC20.sol", "file": "../IERC20.sol", "id": 10913, "nameLocation": "-1:-1:-1", "nodeType": "ImportDirective", "scope": 11192, "sourceUnit": 10850, "src": "140:23:53", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "@openzeppelin/contracts/token/ERC20/extensions/draft-IERC20Permit.sol", "file": "../extensions/draft-IERC20Permit.sol", "id": 10914, "nameLocation": "-1:-1:-1", "nodeType": "ImportDirective", "scope": 11192, "sourceUnit": 10911, "src": "164:46:53", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "@openzeppelin/contracts/utils/Address.sol", "file": "../../../utils/Address.sol", "id": 10915, "nameLocation": "-1:-1:-1", "nodeType": "ImportDirective", "scope": 11192, "sourceUnit": 11487, "src": "211:36:53", "symbolAliases": [], "unitAlias": "" }, { "abstract": false, "baseContracts": [], "contractDependencies": [], "contractKind": "library", "documentation": { "id": 10916, "nodeType": "StructuredDocumentation", "src": "249:457:53", "text": " @title SafeERC20\n @dev Wrappers around ERC20 operations that throw on failure (when the token\n contract returns false). Tokens that return no value (and instead revert or\n throw on failure) are also supported, non-reverting calls are assumed to be\n successful.\n To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,\n which allows you to call the safe operations as `token.safeTransfer(...)`, etc." }, "fullyImplemented": true, "id": 11191, "linearizedBaseContracts": [ 11191 ], "name": "SafeERC20", "nameLocation": "715:9:53", "nodeType": "ContractDefinition", "nodes": [ { "id": 10919, "libraryName": { "id": 10917, "name": "Address", "nodeType": "IdentifierPath", "referencedDeclaration": 11486, "src": "737:7:53" }, "nodeType": "UsingForDirective", "src": "731:26:53", "typeName": { "id": 10918, "name": "address", "nodeType": "ElementaryTypeName", "src": "749:7:53", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } }, { "body": { "id": 10941, "nodeType": "Block", "src": "865:103:53", "statements": [ { "expression": { "arguments": [ { "id": 10930, "name": "token", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10922, "src": "895:5:53", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$10849", "typeString": "contract IERC20" } }, { "arguments": [ { "expression": { "expression": { "id": 10933, "name": "token", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10922, "src": "925:5:53", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$10849", "typeString": "contract IERC20" } }, "id": 10934, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "transfer", "nodeType": "MemberAccess", "referencedDeclaration": 10816, "src": "925:14:53", "typeDescriptions": { "typeIdentifier": "t_function_external_nonpayable$_t_address_$_t_uint256_$returns$_t_bool_$", "typeString": "function (address,uint256) external returns (bool)" } }, "id": 10935, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "selector", "nodeType": "MemberAccess", "src": "925:23:53", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, { "id": 10936, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10924, "src": "950:2:53", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 10937, "name": "value", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10926, "src": "954:5:53", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes4", "typeString": "bytes4" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "id": 10931, "name": "abi", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4294967295, "src": "902:3:53", "typeDescriptions": { "typeIdentifier": "t_magic_abi", "typeString": "abi" } }, "id": 10932, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "memberName": "encodeWithSelector", "nodeType": "MemberAccess", "src": "902:22:53", "typeDescriptions": { "typeIdentifier": "t_function_abiencodewithselector_pure$_t_bytes4_$returns$_t_bytes_memory_ptr_$", "typeString": "function (bytes4) pure returns (bytes memory)" } }, "id": 10938, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "902:58:53", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_contract$_IERC20_$10849", "typeString": "contract IERC20" }, { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } ], "id": 10929, "name": "_callOptionalReturn", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 11190, "src": "875:19:53", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_contract$_IERC20_$10849_$_t_bytes_memory_ptr_$returns$__$", "typeString": "function (contract IERC20,bytes memory)" } }, "id": 10939, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "875:86:53", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 10940, "nodeType": "ExpressionStatement", "src": "875:86:53" } ] }, "id": 10942, "implemented": true, "kind": "function", "modifiers": [], "name": "safeTransfer", "nameLocation": "772:12:53", "nodeType": "FunctionDefinition", "parameters": { "id": 10927, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 10922, "mutability": "mutable", "name": "token", "nameLocation": "801:5:53", "nodeType": "VariableDeclaration", "scope": 10942, "src": "794:12:53", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$10849", "typeString": "contract IERC20" }, "typeName": { "id": 10921, "nodeType": "UserDefinedTypeName", "pathNode": { "id": 10920, "name": "IERC20", "nodeType": "IdentifierPath", "referencedDeclaration": 10849, "src": "794:6:53" }, "referencedDeclaration": 10849, "src": "794:6:53", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$10849", "typeString": "contract IERC20" } }, "visibility": "internal" }, { "constant": false, "id": 10924, "mutability": "mutable", "name": "to", "nameLocation": "824:2:53", "nodeType": "VariableDeclaration", "scope": 10942, "src": "816:10:53", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 10923, "name": "address", "nodeType": "ElementaryTypeName", "src": "816:7:53", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 10926, "mutability": "mutable", "name": "value", "nameLocation": "844:5:53", "nodeType": "VariableDeclaration", "scope": 10942, "src": "836:13:53", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 10925, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "836:7:53", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "784:71:53" }, "returnParameters": { "id": 10928, "nodeType": "ParameterList", "parameters": [], "src": "865:0:53" }, "scope": 11191, "src": "763:205:53", "stateMutability": "nonpayable", "virtual": false, "visibility": "internal" }, { "body": { "id": 10967, "nodeType": "Block", "src": "1102:113:53", "statements": [ { "expression": { "arguments": [ { "id": 10955, "name": "token", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10945, "src": "1132:5:53", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$10849", "typeString": "contract IERC20" } }, { "arguments": [ { "expression": { "expression": { "id": 10958, "name": "token", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10945, "src": "1162:5:53", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$10849", "typeString": "contract IERC20" } }, "id": 10959, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "transferFrom", "nodeType": "MemberAccess", "referencedDeclaration": 10848, "src": "1162:18:53", "typeDescriptions": { "typeIdentifier": "t_function_external_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$_t_bool_$", "typeString": "function (address,address,uint256) external returns (bool)" } }, "id": 10960, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "selector", "nodeType": "MemberAccess", "src": "1162:27:53", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, { "id": 10961, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10947, "src": "1191:4:53", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 10962, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10949, "src": "1197:2:53", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 10963, "name": "value", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10951, "src": "1201:5:53", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes4", "typeString": "bytes4" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "id": 10956, "name": "abi", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4294967295, "src": "1139:3:53", "typeDescriptions": { "typeIdentifier": "t_magic_abi", "typeString": "abi" } }, "id": 10957, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "memberName": "encodeWithSelector", "nodeType": "MemberAccess", "src": "1139:22:53", "typeDescriptions": { "typeIdentifier": "t_function_abiencodewithselector_pure$_t_bytes4_$returns$_t_bytes_memory_ptr_$", "typeString": "function (bytes4) pure returns (bytes memory)" } }, "id": 10964, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1139:68:53", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_contract$_IERC20_$10849", "typeString": "contract IERC20" }, { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } ], "id": 10954, "name": "_callOptionalReturn", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 11190, "src": "1112:19:53", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_contract$_IERC20_$10849_$_t_bytes_memory_ptr_$returns$__$", "typeString": "function (contract IERC20,bytes memory)" } }, "id": 10965, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1112:96:53", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 10966, "nodeType": "ExpressionStatement", "src": "1112:96:53" } ] }, "id": 10968, "implemented": true, "kind": "function", "modifiers": [], "name": "safeTransferFrom", "nameLocation": "983:16:53", "nodeType": "FunctionDefinition", "parameters": { "id": 10952, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 10945, "mutability": "mutable", "name": "token", "nameLocation": "1016:5:53", "nodeType": "VariableDeclaration", "scope": 10968, "src": "1009:12:53", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$10849", "typeString": "contract IERC20" }, "typeName": { "id": 10944, "nodeType": "UserDefinedTypeName", "pathNode": { "id": 10943, "name": "IERC20", "nodeType": "IdentifierPath", "referencedDeclaration": 10849, "src": "1009:6:53" }, "referencedDeclaration": 10849, "src": "1009:6:53", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$10849", "typeString": "contract IERC20" } }, "visibility": "internal" }, { "constant": false, "id": 10947, "mutability": "mutable", "name": "from", "nameLocation": "1039:4:53", "nodeType": "VariableDeclaration", "scope": 10968, "src": "1031:12:53", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 10946, "name": "address", "nodeType": "ElementaryTypeName", "src": "1031:7:53", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 10949, "mutability": "mutable", "name": "to", "nameLocation": "1061:2:53", "nodeType": "VariableDeclaration", "scope": 10968, "src": "1053:10:53", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 10948, "name": "address", "nodeType": "ElementaryTypeName", "src": "1053:7:53", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 10951, "mutability": "mutable", "name": "value", "nameLocation": "1081:5:53", "nodeType": "VariableDeclaration", "scope": 10968, "src": "1073:13:53", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 10950, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1073:7:53", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "999:93:53" }, "returnParameters": { "id": 10953, "nodeType": "ParameterList", "parameters": [], "src": "1102:0:53" }, "scope": 11191, "src": "974:241:53", "stateMutability": "nonpayable", "virtual": false, "visibility": "internal" }, { "body": { "id": 11011, "nodeType": "Block", "src": "1581:497:53", "statements": [ { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_bool", "typeString": "bool" }, "id": 10995, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "components": [ { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 10982, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 10980, "name": "value", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10976, "src": "1830:5:53", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "hexValue": "30", "id": 10981, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "1839:1:53", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" }, "src": "1830:10:53", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } } ], "id": 10983, "isConstant": false, "isInlineArray": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "TupleExpression", "src": "1829:12:53", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "nodeType": "BinaryOperation", "operator": "||", "rightExpression": { "components": [ { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 10993, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "arguments": [ { "arguments": [ { "id": 10988, "name": "this", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4294967268, "src": "1870:4:53", "typeDescriptions": { "typeIdentifier": "t_contract$_SafeERC20_$11191", "typeString": "library SafeERC20" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_contract$_SafeERC20_$11191", "typeString": "library SafeERC20" } ], "id": 10987, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "1862:7:53", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 10986, "name": "address", "nodeType": "ElementaryTypeName", "src": "1862:7:53", "typeDescriptions": {} } }, "id": 10989, "isConstant": false, "isLValue": false, "isPure": false, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1862:13:53", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 10990, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10974, "src": "1877:7:53", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" } ], "expression": { "id": 10984, "name": "token", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10972, "src": "1846:5:53", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$10849", "typeString": "contract IERC20" } }, "id": 10985, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "allowance", "nodeType": "MemberAccess", "referencedDeclaration": 10826, "src": "1846:15:53", "typeDescriptions": { "typeIdentifier": "t_function_external_view$_t_address_$_t_address_$returns$_t_uint256_$", "typeString": "function (address,address) view external returns (uint256)" } }, "id": 10991, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1846:39:53", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "hexValue": "30", "id": 10992, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "1889:1:53", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" }, "src": "1846:44:53", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } } ], "id": 10994, "isConstant": false, "isInlineArray": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "TupleExpression", "src": "1845:46:53", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "src": "1829:62:53", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "5361666545524332303a20617070726f76652066726f6d206e6f6e2d7a65726f20746f206e6f6e2d7a65726f20616c6c6f77616e6365", "id": 10996, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "1905:56:53", "typeDescriptions": { "typeIdentifier": "t_stringliteral_ef945ddb1bfdc0da870feb4560d868b047642b4ac7f2fb7f8b7c51cb4a411e25", "typeString": "literal_string \"SafeERC20: approve from non-zero to non-zero allowance\"" }, "value": "SafeERC20: approve from non-zero to non-zero allowance" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_ef945ddb1bfdc0da870feb4560d868b047642b4ac7f2fb7f8b7c51cb4a411e25", "typeString": "literal_string \"SafeERC20: approve from non-zero to non-zero allowance\"" } ], "id": 10979, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "1808:7:53", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 10997, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1808:163:53", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 10998, "nodeType": "ExpressionStatement", "src": "1808:163:53" }, { "expression": { "arguments": [ { "id": 11000, "name": "token", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10972, "src": "2001:5:53", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$10849", "typeString": "contract IERC20" } }, { "arguments": [ { "expression": { "expression": { "id": 11003, "name": "token", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10972, "src": "2031:5:53", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$10849", "typeString": "contract IERC20" } }, "id": 11004, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "approve", "nodeType": "MemberAccess", "referencedDeclaration": 10836, "src": "2031:13:53", "typeDescriptions": { "typeIdentifier": "t_function_external_nonpayable$_t_address_$_t_uint256_$returns$_t_bool_$", "typeString": "function (address,uint256) external returns (bool)" } }, "id": 11005, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "selector", "nodeType": "MemberAccess", "src": "2031:22:53", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, { "id": 11006, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10974, "src": "2055:7:53", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 11007, "name": "value", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 10976, "src": "2064:5:53", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes4", "typeString": "bytes4" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "id": 11001, "name": "abi", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4294967295, "src": "2008:3:53", "typeDescriptions": { "typeIdentifier": "t_magic_abi", "typeString": "abi" } }, "id": 11002, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "memberName": "encodeWithSelector", "nodeType": "MemberAccess", "src": "2008:22:53", "typeDescriptions": { "typeIdentifier": "t_function_abiencodewithselector_pure$_t_bytes4_$returns$_t_bytes_memory_ptr_$", "typeString": "function (bytes4) pure returns (bytes memory)" } }, "id": 11008, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2008:62:53", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_contract$_IERC20_$10849", "typeString": "contract IERC20" }, { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } ], "id": 10999, "name": "_callOptionalReturn", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 11190, "src": "1981:19:53", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_contract$_IERC20_$10849_$_t_bytes_memory_ptr_$returns$__$", "typeString": "function (contract IERC20,bytes memory)" } }, "id": 11009, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1981:90:53", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 11010, "nodeType": "ExpressionStatement", "src": "1981:90:53" } ] }, "documentation": { "id": 10969, "nodeType": "StructuredDocumentation", "src": "1221:249:53", "text": " @dev Deprecated. This function has issues similar to the ones found in\n {IERC20-approve}, and its usage is discouraged.\n Whenever possible, use {safeIncreaseAllowance} and\n {safeDecreaseAllowance} instead." }, "id": 11012, "implemented": true, "kind": "function", "modifiers": [], "name": "safeApprove", "nameLocation": "1484:11:53", "nodeType": "FunctionDefinition", "parameters": { "id": 10977, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 10972, "mutability": "mutable", "name": "token", "nameLocation": "1512:5:53", "nodeType": "VariableDeclaration", "scope": 11012, "src": "1505:12:53", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$10849", "typeString": "contract IERC20" }, "typeName": { "id": 10971, "nodeType": "UserDefinedTypeName", "pathNode": { "id": 10970, "name": "IERC20", "nodeType": "IdentifierPath", "referencedDeclaration": 10849, "src": "1505:6:53" }, "referencedDeclaration": 10849, "src": "1505:6:53", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$10849", "typeString": "contract IERC20" } }, "visibility": "internal" }, { "constant": false, "id": 10974, "mutability": "mutable", "name": "spender", "nameLocation": "1535:7:53", "nodeType": "VariableDeclaration", "scope": 11012, "src": "1527:15:53", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 10973, "name": "address", "nodeType": "ElementaryTypeName", "src": "1527:7:53", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 10976, "mutability": "mutable", "name": "value", "nameLocation": "1560:5:53", "nodeType": "VariableDeclaration", "scope": 11012, "src": "1552:13:53", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 10975, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1552:7:53", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "1495:76:53" }, "returnParameters": { "id": 10978, "nodeType": "ParameterList", "parameters": [], "src": "1581:0:53" }, "scope": 11191, "src": "1475:603:53", "stateMutability": "nonpayable", "virtual": false, "visibility": "internal" }, { "body": { "id": 11047, "nodeType": "Block", "src": "2200:194:53", "statements": [ { "assignments": [ 11023 ], "declarations": [ { "constant": false, "id": 11023, "mutability": "mutable", "name": "newAllowance", "nameLocation": "2218:12:53", "nodeType": "VariableDeclaration", "scope": 11047, "src": "2210:20:53", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 11022, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "2210:7:53", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "id": 11034, "initialValue": { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 11033, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "arguments": [ { "arguments": [ { "id": 11028, "name": "this", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4294967268, "src": "2257:4:53", "typeDescriptions": { "typeIdentifier": "t_contract$_SafeERC20_$11191", "typeString": "library SafeERC20" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_contract$_SafeERC20_$11191", "typeString": "library SafeERC20" } ], "id": 11027, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "2249:7:53", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 11026, "name": "address", "nodeType": "ElementaryTypeName", "src": "2249:7:53", "typeDescriptions": {} } }, "id": 11029, "isConstant": false, "isLValue": false, "isPure": false, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2249:13:53", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 11030, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 11017, "src": "2264:7:53", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" } ], "expression": { "id": 11024, "name": "token", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 11015, "src": "2233:5:53", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$10849", "typeString": "contract IERC20" } }, "id": 11025, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "allowance", "nodeType": "MemberAccess", "referencedDeclaration": 10826, "src": "2233:15:53", "typeDescriptions": { "typeIdentifier": "t_function_external_view$_t_address_$_t_address_$returns$_t_uint256_$", "typeString": "function (address,address) view external returns (uint256)" } }, "id": 11031, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2233:39:53", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "+", "rightExpression": { "id": 11032, "name": "value", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 11019, "src": "2275:5:53", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "2233:47:53", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "VariableDeclarationStatement", "src": "2210:70:53" }, { "expression": { "arguments": [ { "id": 11036, "name": "token", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 11015, "src": "2310:5:53", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$10849", "typeString": "contract IERC20" } }, { "arguments": [ { "expression": { "expression": { "id": 11039, "name": "token", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 11015, "src": "2340:5:53", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$10849", "typeString": "contract IERC20" } }, "id": 11040, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "approve", "nodeType": "MemberAccess", "referencedDeclaration": 10836, "src": "2340:13:53", "typeDescriptions": { "typeIdentifier": "t_function_external_nonpayable$_t_address_$_t_uint256_$returns$_t_bool_$", "typeString": "function (address,uint256) external returns (bool)" } }, "id": 11041, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "selector", "nodeType": "MemberAccess", "src": "2340:22:53", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, { "id": 11042, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 11017, "src": "2364:7:53", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 11043, "name": "newAllowance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 11023, "src": "2373:12:53", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes4", "typeString": "bytes4" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "id": 11037, "name": "abi", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4294967295, "src": "2317:3:53", "typeDescriptions": { "typeIdentifier": "t_magic_abi", "typeString": "abi" } }, "id": 11038, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "memberName": "encodeWithSelector", "nodeType": "MemberAccess", "src": "2317:22:53", "typeDescriptions": { "typeIdentifier": "t_function_abiencodewithselector_pure$_t_bytes4_$returns$_t_bytes_memory_ptr_$", "typeString": "function (bytes4) pure returns (bytes memory)" } }, "id": 11044, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2317:69:53", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_contract$_IERC20_$10849", "typeString": "contract IERC20" }, { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } ], "id": 11035, "name": "_callOptionalReturn", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 11190, "src": "2290:19:53", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_contract$_IERC20_$10849_$_t_bytes_memory_ptr_$returns$__$", "typeString": "function (contract IERC20,bytes memory)" } }, "id": 11045, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2290:97:53", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 11046, "nodeType": "ExpressionStatement", "src": "2290:97:53" } ] }, "id": 11048, "implemented": true, "kind": "function", "modifiers": [], "name": "safeIncreaseAllowance", "nameLocation": "2093:21:53", "nodeType": "FunctionDefinition", "parameters": { "id": 11020, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 11015, "mutability": "mutable", "name": "token", "nameLocation": "2131:5:53", "nodeType": "VariableDeclaration", "scope": 11048, "src": "2124:12:53", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$10849", "typeString": "contract IERC20" }, "typeName": { "id": 11014, "nodeType": "UserDefinedTypeName", "pathNode": { "id": 11013, "name": "IERC20", "nodeType": "IdentifierPath", "referencedDeclaration": 10849, "src": "2124:6:53" }, "referencedDeclaration": 10849, "src": "2124:6:53", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$10849", "typeString": "contract IERC20" } }, "visibility": "internal" }, { "constant": false, "id": 11017, "mutability": "mutable", "name": "spender", "nameLocation": "2154:7:53", "nodeType": "VariableDeclaration", "scope": 11048, "src": "2146:15:53", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 11016, "name": "address", "nodeType": "ElementaryTypeName", "src": "2146:7:53", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 11019, "mutability": "mutable", "name": "value", "nameLocation": "2179:5:53", "nodeType": "VariableDeclaration", "scope": 11048, "src": "2171:13:53", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 11018, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "2171:7:53", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "2114:76:53" }, "returnParameters": { "id": 11021, "nodeType": "ParameterList", "parameters": [], "src": "2200:0:53" }, "scope": 11191, "src": "2084:310:53", "stateMutability": "nonpayable", "virtual": false, "visibility": "internal" }, { "body": { "id": 11095, "nodeType": "Block", "src": "2516:370:53", "statements": [ { "id": 11094, "nodeType": "UncheckedBlock", "src": "2526:354:53", "statements": [ { "assignments": [ 11059 ], "declarations": [ { "constant": false, "id": 11059, "mutability": "mutable", "name": "oldAllowance", "nameLocation": "2558:12:53", "nodeType": "VariableDeclaration", "scope": 11094, "src": "2550:20:53", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 11058, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "2550:7:53", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "id": 11068, "initialValue": { "arguments": [ { "arguments": [ { "id": 11064, "name": "this", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4294967268, "src": "2597:4:53", "typeDescriptions": { "typeIdentifier": "t_contract$_SafeERC20_$11191", "typeString": "library SafeERC20" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_contract$_SafeERC20_$11191", "typeString": "library SafeERC20" } ], "id": 11063, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "2589:7:53", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 11062, "name": "address", "nodeType": "ElementaryTypeName", "src": "2589:7:53", "typeDescriptions": {} } }, "id": 11065, "isConstant": false, "isLValue": false, "isPure": false, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2589:13:53", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 11066, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 11053, "src": "2604:7:53", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" } ], "expression": { "id": 11060, "name": "token", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 11051, "src": "2573:5:53", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$10849", "typeString": "contract IERC20" } }, "id": 11061, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "allowance", "nodeType": "MemberAccess", "referencedDeclaration": 10826, "src": "2573:15:53", "typeDescriptions": { "typeIdentifier": "t_function_external_view$_t_address_$_t_address_$returns$_t_uint256_$", "typeString": "function (address,address) view external returns (uint256)" } }, "id": 11067, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2573:39:53", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "VariableDeclarationStatement", "src": "2550:62:53" }, { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 11072, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 11070, "name": "oldAllowance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 11059, "src": "2634:12:53", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": ">=", "rightExpression": { "id": 11071, "name": "value", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 11055, "src": "2650:5:53", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "2634:21:53", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "5361666545524332303a2064656372656173656420616c6c6f77616e63652062656c6f77207a65726f", "id": 11073, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "2657:43:53", "typeDescriptions": { "typeIdentifier": "t_stringliteral_2c3af60974a758b7e72e108c9bf0943ecc9e4f2e8af4695da5f52fbf57a63d3a", "typeString": "literal_string \"SafeERC20: decreased allowance below zero\"" }, "value": "SafeERC20: decreased allowance below zero" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_2c3af60974a758b7e72e108c9bf0943ecc9e4f2e8af4695da5f52fbf57a63d3a", "typeString": "literal_string \"SafeERC20: decreased allowance below zero\"" } ], "id": 11069, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "2626:7:53", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 11074, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2626:75:53", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 11075, "nodeType": "ExpressionStatement", "src": "2626:75:53" }, { "assignments": [ 11077 ], "declarations": [ { "constant": false, "id": 11077, "mutability": "mutable", "name": "newAllowance", "nameLocation": "2723:12:53", "nodeType": "VariableDeclaration", "scope": 11094, "src": "2715:20:53", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 11076, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "2715:7:53", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "id": 11081, "initialValue": { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 11080, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 11078, "name": "oldAllowance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 11059, "src": "2738:12:53", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "-", "rightExpression": { "id": 11079, "name": "value", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 11055, "src": "2753:5:53", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "2738:20:53", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "VariableDeclarationStatement", "src": "2715:43:53" }, { "expression": { "arguments": [ { "id": 11083, "name": "token", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 11051, "src": "2792:5:53", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$10849", "typeString": "contract IERC20" } }, { "arguments": [ { "expression": { "expression": { "id": 11086, "name": "token", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 11051, "src": "2822:5:53", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$10849", "typeString": "contract IERC20" } }, "id": 11087, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "approve", "nodeType": "MemberAccess", "referencedDeclaration": 10836, "src": "2822:13:53", "typeDescriptions": { "typeIdentifier": "t_function_external_nonpayable$_t_address_$_t_uint256_$returns$_t_bool_$", "typeString": "function (address,uint256) external returns (bool)" } }, "id": 11088, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "selector", "nodeType": "MemberAccess", "src": "2822:22:53", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, { "id": 11089, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 11053, "src": "2846:7:53", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 11090, "name": "newAllowance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 11077, "src": "2855:12:53", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes4", "typeString": "bytes4" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "id": 11084, "name": "abi", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4294967295, "src": "2799:3:53", "typeDescriptions": { "typeIdentifier": "t_magic_abi", "typeString": "abi" } }, "id": 11085, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "memberName": "encodeWithSelector", "nodeType": "MemberAccess", "src": "2799:22:53", "typeDescriptions": { "typeIdentifier": "t_function_abiencodewithselector_pure$_t_bytes4_$returns$_t_bytes_memory_ptr_$", "typeString": "function (bytes4) pure returns (bytes memory)" } }, "id": 11091, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2799:69:53", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_contract$_IERC20_$10849", "typeString": "contract IERC20" }, { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } ], "id": 11082, "name": "_callOptionalReturn", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 11190, "src": "2772:19:53", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_contract$_IERC20_$10849_$_t_bytes_memory_ptr_$returns$__$", "typeString": "function (contract IERC20,bytes memory)" } }, "id": 11092, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2772:97:53", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 11093, "nodeType": "ExpressionStatement", "src": "2772:97:53" } ] } ] }, "id": 11096, "implemented": true, "kind": "function", "modifiers": [], "name": "safeDecreaseAllowance", "nameLocation": "2409:21:53", "nodeType": "FunctionDefinition", "parameters": { "id": 11056, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 11051, "mutability": "mutable", "name": "token", "nameLocation": "2447:5:53", "nodeType": "VariableDeclaration", "scope": 11096, "src": "2440:12:53", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$10849", "typeString": "contract IERC20" }, "typeName": { "id": 11050, "nodeType": "UserDefinedTypeName", "pathNode": { "id": 11049, "name": "IERC20", "nodeType": "IdentifierPath", "referencedDeclaration": 10849, "src": "2440:6:53" }, "referencedDeclaration": 10849, "src": "2440:6:53", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$10849", "typeString": "contract IERC20" } }, 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"ElementaryTypeName", "src": "4383:4:53", "typeDescriptions": {} } } ], "id": 11182, "isConstant": false, "isInlineArray": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "TupleExpression", "src": "4382:6:53", "typeDescriptions": { "typeIdentifier": "t_type$_t_bool_$", "typeString": "type(bool)" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" }, { "typeIdentifier": "t_type$_t_bool_$", "typeString": "type(bool)" } ], "expression": { "id": 11177, "name": "abi", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4294967295, "src": "4359:3:53", "typeDescriptions": { "typeIdentifier": "t_magic_abi", "typeString": "abi" } }, "id": 11178, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "memberName": "decode", "nodeType": "MemberAccess", "src": "4359:10:53", "typeDescriptions": { "typeIdentifier": "t_function_abidecode_pure$__$returns$__$", "typeString": "function () pure" } }, "id": 11183, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4359:30:53", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "5361666545524332303a204552433230206f7065726174696f6e20646964206e6f742073756363656564", "id": 11184, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "4391:44:53", "typeDescriptions": { "typeIdentifier": "t_stringliteral_e11ad79d1e4a7f2e5f376964cb99e8e8f7904e3fc16a109f7a7ecb9aa7956dcd", "typeString": "literal_string \"SafeERC20: ERC20 operation did not succeed\"" }, "value": "SafeERC20: ERC20 operation did not succeed" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_e11ad79d1e4a7f2e5f376964cb99e8e8f7904e3fc16a109f7a7ecb9aa7956dcd", "typeString": "literal_string \"SafeERC20: ERC20 operation did not succeed\"" } ], "id": 11176, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4294967278, 4294967278 ], "referencedDeclaration": 4294967278, "src": "4351:7:53", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 11185, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4351:85:53", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 11186, "nodeType": "ExpressionStatement", "src": "4351:85:53" } ] } } ] }, "documentation": { "id": 11153, "nodeType": "StructuredDocumentation", "src": "3370:372:53", "text": " @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement\n on the return value: the return value is optional (but if data is returned, it must not be false).\n @param token The token targeted by the call.\n @param data The call data (encoded using abi.encode or one of its variants)." }, "id": 11190, "implemented": true, "kind": "function", "modifiers": [], "name": "_callOptionalReturn", "nameLocation": "3756:19:53", "nodeType": "FunctionDefinition", "parameters": { "id": 11159, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 11156, "mutability": "mutable", "name": "token", "nameLocation": "3783:5:53", "nodeType": "VariableDeclaration", "scope": 11190, "src": "3776:12:53", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$10849", "typeString": "contract IERC20" }, "typeName": { "id": 11155, "nodeType": "UserDefinedTypeName", "pathNode": { "id": 11154, "name": "IERC20", "nodeType": "IdentifierPath", "referencedDeclaration": 10849, "src": "3776:6:53" }, "referencedDeclaration": 10849, "src": "3776:6:53", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$10849", "typeString": "contract IERC20" } }, "visibility": "internal" }, { "constant": false, "id": 11158, "mutability": "mutable", "name": "data", "nameLocation": "3803:4:53", "nodeType": "VariableDeclaration", "scope": 11190, "src": "3790:17:53", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 11157, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "3790:5:53", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "visibility": "internal" } ], "src": "3775:33:53" }, "returnParameters": { "id": 11160, "nodeType": "ParameterList", "parameters": [], "src": "3817:0:53" }, "scope": 11191, "src": "3747:706:53", "stateMutability": "nonpayable", "virtual": false, "visibility": "private" } ], "scope": 11192, "src": "707:3748:53", "usedErrors": [] } ], "src": "115:4341:53" }, "compiler": { "name": "solc", "version": "0.8.7+commit.e28d00a7.Emscripten.clang" }, "networks": {}, "schemaVersion": "3.1.0", "updatedAt": "2023-03-16T16:54:15.272Z", "devdoc": { "details": "Wrappers around ERC20 operations that throw on failure (when the token contract returns false). Tokens that return no value (and instead revert or throw on failure) are also supported, non-reverting calls are assumed to be successful. To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract, which allows you to call the safe operations as `token.safeTransfer(...)`, etc.", "kind": "dev", "methods": {}, "title": "SafeERC20", "version": 1 }, "userdoc": { "kind": "user", "methods": {}, "version": 1 } }