{ "abi": [], "allSourcePaths": { "104": "node_modules/@openzeppelin/contracts/utils/Address.sol", "97": "node_modules/@openzeppelin/contracts/token/ERC20/IERC20.sol", "99": "node_modules/@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol" }, "ast": { "absolutePath": "node_modules/@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol", "exportedSymbols": { "Address": [ 24344 ], "IERC20": [ 16706 ], "SafeERC20": [ 16495 ] }, "id": 16496, "license": "MIT", "nodeType": "SourceUnit", "nodes": [ { "id": 16273, "literals": [ "solidity", "^", "0.8", ".0" ], "nodeType": "PragmaDirective", "src": "100:23:99" }, { "absolutePath": "node_modules/@openzeppelin/contracts/token/ERC20/IERC20.sol", "file": "../IERC20.sol", "id": 16274, "nameLocation": "-1:-1:-1", "nodeType": "ImportDirective", "scope": 16496, "sourceUnit": 16707, "src": "125:23:99", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "node_modules/@openzeppelin/contracts/utils/Address.sol", "file": "../../../utils/Address.sol", "id": 16275, "nameLocation": "-1:-1:-1", "nodeType": "ImportDirective", "scope": 16496, "sourceUnit": 24345, "src": "149:36:99", "symbolAliases": [], "unitAlias": "" }, { "abstract": false, "baseContracts": [], "contractDependencies": [], "contractKind": "library", "documentation": { "id": 16276, "nodeType": "StructuredDocumentation", "src": "187:457:99", "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": 16495, "linearizedBaseContracts": [ 16495 ], "name": "SafeERC20", "nameLocation": "653:9:99", "nodeType": "ContractDefinition", "nodes": [ { "id": 16279, "libraryName": { "id": 16277, "name": "Address", "nodeType": "IdentifierPath", "referencedDeclaration": 24344, "src": "675:7:99" }, "nodeType": "UsingForDirective", "src": "669:26:99", "typeName": { "id": 16278, "name": "address", "nodeType": "ElementaryTypeName", "src": "687:7:99", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } }, { "body": { "id": 16301, "nodeType": "Block", "src": "803:103:99", "statements": [ { "expression": { "arguments": [ { "id": 16290, "name": "token", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 16282, "src": "833:5:99", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$16706", "typeString": "contract IERC20" } }, { "arguments": [ { "expression": { "expression": { "id": 16293, "name": "token", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 16282, "src": "863:5:99", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$16706", "typeString": "contract IERC20" } }, "id": 16294, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "transfer", "nodeType": "MemberAccess", "referencedDeclaration": 16655, "src": "863:14:99", "typeDescriptions": { "typeIdentifier": "t_function_external_nonpayable$_t_address_$_t_uint256_$returns$_t_bool_$", "typeString": "function (address,uint256) external returns (bool)" } }, "id": 16295, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "selector", "nodeType": "MemberAccess", "src": "863:23:99", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, { "id": 16296, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 16284, "src": "888:2:99", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 16297, "name": "value", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 16286, "src": "892:5:99", "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": 16291, "name": "abi", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": -1, "src": "840:3:99", "typeDescriptions": { "typeIdentifier": "t_magic_abi", "typeString": "abi" } }, "id": 16292, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "memberName": "encodeWithSelector", "nodeType": "MemberAccess", "src": "840:22:99", "typeDescriptions": { "typeIdentifier": "t_function_abiencodewithselector_pure$_t_bytes4_$returns$_t_bytes_memory_ptr_$", "typeString": "function (bytes4) pure returns (bytes memory)" } }, "id": 16298, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "840:58:99", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_contract$_IERC20_$16706", "typeString": "contract IERC20" }, { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } ], "id": 16289, "name": "_callOptionalReturn", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 16494, "src": "813:19:99", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_contract$_IERC20_$16706_$_t_bytes_memory_ptr_$returns$__$", "typeString": "function (contract IERC20,bytes memory)" } }, "id": 16299, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "813:86:99", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 16300, "nodeType": "ExpressionStatement", "src": "813:86:99" } ] }, "id": 16302, "implemented": true, "kind": "function", "modifiers": [], "name": "safeTransfer", "nameLocation": "710:12:99", "nodeType": "FunctionDefinition", "parameters": { "id": 16287, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 16282, "mutability": "mutable", "name": "token", "nameLocation": "739:5:99", "nodeType": "VariableDeclaration", "scope": 16302, "src": "732:12:99", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$16706", "typeString": "contract IERC20" }, "typeName": { "id": 16281, "nodeType": "UserDefinedTypeName", "pathNode": { "id": 16280, "name": "IERC20", "nodeType": "IdentifierPath", "referencedDeclaration": 16706, "src": "732:6:99" }, "referencedDeclaration": 16706, "src": "732:6:99", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$16706", "typeString": "contract IERC20" } }, "visibility": "internal" }, { "constant": false, "id": 16284, "mutability": "mutable", "name": "to", "nameLocation": "762:2:99", "nodeType": "VariableDeclaration", "scope": 16302, "src": "754:10:99", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 16283, "name": "address", "nodeType": "ElementaryTypeName", "src": "754:7:99", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 16286, "mutability": "mutable", "name": "value", "nameLocation": "782:5:99", "nodeType": "VariableDeclaration", "scope": 16302, "src": "774:13:99", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 16285, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "774:7:99", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "722:71:99" }, "returnParameters": { "id": 16288, "nodeType": "ParameterList", "parameters": [], "src": "803:0:99" }, "scope": 16495, "src": "701:205:99", "stateMutability": "nonpayable", "virtual": false, "visibility": "internal" }, { "body": { "id": 16327, "nodeType": "Block", "src": "1040:113:99", "statements": [ { "expression": { "arguments": [ { "id": 16315, "name": "token", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 16305, "src": "1070:5:99", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$16706", "typeString": "contract IERC20" } }, { "arguments": [ { "expression": { "expression": { "id": 16318, "name": "token", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 16305, "src": "1100:5:99", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$16706", "typeString": "contract IERC20" } }, "id": 16319, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "transferFrom", "nodeType": "MemberAccess", "referencedDeclaration": 16687, "src": "1100:18:99", "typeDescriptions": { "typeIdentifier": "t_function_external_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$_t_bool_$", "typeString": "function (address,address,uint256) external returns (bool)" } }, "id": 16320, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "selector", "nodeType": "MemberAccess", "src": "1100:27:99", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, { "id": 16321, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 16307, "src": "1129:4:99", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 16322, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 16309, "src": "1135:2:99", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 16323, "name": "value", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 16311, "src": "1139:5:99", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes4", "typeString": "bytes4" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "id": 16316, "name": "abi", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": -1, "src": "1077:3:99", "typeDescriptions": { "typeIdentifier": "t_magic_abi", "typeString": "abi" } }, "id": 16317, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "memberName": "encodeWithSelector", "nodeType": "MemberAccess", "src": "1077:22:99", "typeDescriptions": { "typeIdentifier": "t_function_abiencodewithselector_pure$_t_bytes4_$returns$_t_bytes_memory_ptr_$", "typeString": "function (bytes4) pure returns (bytes memory)" } }, "id": 16324, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1077:68:99", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_contract$_IERC20_$16706", "typeString": "contract IERC20" }, { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } ], "id": 16314, "name": "_callOptionalReturn", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 16494, "src": "1050:19:99", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_contract$_IERC20_$16706_$_t_bytes_memory_ptr_$returns$__$", "typeString": "function (contract IERC20,bytes memory)" } }, "id": 16325, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1050:96:99", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 16326, "nodeType": "ExpressionStatement", "src": "1050:96:99" } ] }, "id": 16328, "implemented": true, "kind": "function", "modifiers": [], "name": "safeTransferFrom", "nameLocation": "921:16:99", "nodeType": "FunctionDefinition", "parameters": { "id": 16312, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 16305, "mutability": "mutable", "name": "token", "nameLocation": "954:5:99", "nodeType": "VariableDeclaration", "scope": 16328, "src": "947:12:99", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$16706", "typeString": "contract IERC20" }, "typeName": { "id": 16304, "nodeType": "UserDefinedTypeName", "pathNode": { "id": 16303, "name": "IERC20", "nodeType": "IdentifierPath", "referencedDeclaration": 16706, "src": "947:6:99" }, "referencedDeclaration": 16706, "src": "947:6:99", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$16706", "typeString": "contract IERC20" } }, "visibility": "internal" }, { "constant": false, "id": 16307, "mutability": "mutable", "name": "from", "nameLocation": "977:4:99", "nodeType": "VariableDeclaration", "scope": 16328, "src": "969:12:99", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 16306, "name": "address", "nodeType": "ElementaryTypeName", "src": "969:7:99", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 16309, "mutability": "mutable", "name": "to", "nameLocation": "999:2:99", "nodeType": "VariableDeclaration", "scope": 16328, "src": "991:10:99", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 16308, "name": "address", "nodeType": "ElementaryTypeName", "src": "991:7:99", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 16311, "mutability": "mutable", "name": "value", "nameLocation": "1019:5:99", "nodeType": "VariableDeclaration", "scope": 16328, "src": "1011:13:99", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 16310, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1011:7:99", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "937:93:99" }, "returnParameters": { "id": 16313, "nodeType": "ParameterList", "parameters": [], "src": "1040:0:99" }, "scope": 16495, "src": "912:241:99", "stateMutability": "nonpayable", "virtual": false, "visibility": "internal" }, { "body": { "id": 16371, "nodeType": "Block", "src": "1519:497:99", "statements": [ { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_bool", "typeString": "bool" }, "id": 16355, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "components": [ { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 16342, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 16340, "name": "value", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 16336, "src": "1768:5:99", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "hexValue": "30", "id": 16341, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "1777:1:99", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" }, "src": "1768:10:99", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } } ], "id": 16343, "isConstant": false, "isInlineArray": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "TupleExpression", "src": "1767:12:99", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "nodeType": "BinaryOperation", "operator": "||", "rightExpression": { "components": [ { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 16353, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "arguments": [ { "arguments": [ { "id": 16348, "name": "this", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": -28, "src": "1808:4:99", "typeDescriptions": { "typeIdentifier": "t_contract$_SafeERC20_$16495", "typeString": "library SafeERC20" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_contract$_SafeERC20_$16495", "typeString": "library SafeERC20" } ], "id": 16347, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "1800:7:99", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 16346, "name": "address", "nodeType": "ElementaryTypeName", "src": "1800:7:99", "typeDescriptions": {} } }, "id": 16349, "isConstant": false, "isLValue": false, "isPure": false, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1800:13:99", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 16350, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 16334, "src": "1815:7:99", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" } ], "expression": { "id": 16344, "name": "token", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 16332, "src": "1784:5:99", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$16706", "typeString": "contract IERC20" } }, "id": 16345, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "allowance", "nodeType": "MemberAccess", "referencedDeclaration": 16665, "src": "1784:15:99", "typeDescriptions": { "typeIdentifier": "t_function_external_view$_t_address_$_t_address_$returns$_t_uint256_$", "typeString": "function (address,address) view external returns (uint256)" } }, "id": 16351, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1784:39:99", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "hexValue": "30", "id": 16352, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "1827:1:99", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" }, "src": "1784:44:99", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } } ], "id": 16354, "isConstant": false, "isInlineArray": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "TupleExpression", "src": "1783:46:99", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "src": "1767:62:99", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "5361666545524332303a20617070726f76652066726f6d206e6f6e2d7a65726f20746f206e6f6e2d7a65726f20616c6c6f77616e6365", "id": 16356, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "1843:56:99", "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": 16339, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ -18, -18 ], "referencedDeclaration": -18, "src": "1746:7:99", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 16357, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1746:163:99", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 16358, "nodeType": "ExpressionStatement", "src": "1746:163:99" }, { "expression": { "arguments": [ { "id": 16360, "name": "token", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 16332, "src": "1939:5:99", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$16706", "typeString": "contract IERC20" } }, { "arguments": [ { "expression": { "expression": { "id": 16363, "name": "token", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 16332, "src": "1969:5:99", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$16706", "typeString": "contract IERC20" } }, "id": 16364, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "approve", "nodeType": "MemberAccess", "referencedDeclaration": 16675, "src": "1969:13:99", "typeDescriptions": { "typeIdentifier": "t_function_external_nonpayable$_t_address_$_t_uint256_$returns$_t_bool_$", "typeString": "function (address,uint256) external returns (bool)" } }, "id": 16365, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "selector", "nodeType": "MemberAccess", "src": "1969:22:99", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, { "id": 16366, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 16334, "src": "1993:7:99", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 16367, "name": "value", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 16336, "src": "2002:5:99", "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": 16361, "name": "abi", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": -1, "src": "1946:3:99", "typeDescriptions": { "typeIdentifier": "t_magic_abi", "typeString": "abi" } }, "id": 16362, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "memberName": "encodeWithSelector", "nodeType": "MemberAccess", "src": "1946:22:99", "typeDescriptions": { "typeIdentifier": "t_function_abiencodewithselector_pure$_t_bytes4_$returns$_t_bytes_memory_ptr_$", "typeString": "function (bytes4) pure returns (bytes memory)" } }, "id": 16368, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1946:62:99", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_contract$_IERC20_$16706", "typeString": "contract IERC20" }, { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } ], "id": 16359, "name": "_callOptionalReturn", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 16494, "src": "1919:19:99", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_contract$_IERC20_$16706_$_t_bytes_memory_ptr_$returns$__$", "typeString": "function (contract IERC20,bytes memory)" } }, "id": 16369, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1919:90:99", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 16370, "nodeType": "ExpressionStatement", "src": "1919:90:99" } ] }, "documentation": { "id": 16329, "nodeType": "StructuredDocumentation", "src": "1159:249:99", "text": " @dev Deprecated. This function has issues similar to the ones found in\n {IERC20-approve}, and its usage is discouraged.\n Whenever possible, use {safeIncreaseAllowance} and\n {safeDecreaseAllowance} instead." }, "id": 16372, "implemented": true, "kind": "function", "modifiers": [], "name": "safeApprove", "nameLocation": "1422:11:99", "nodeType": "FunctionDefinition", "parameters": { "id": 16337, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 16332, "mutability": "mutable", "name": "token", "nameLocation": "1450:5:99", "nodeType": "VariableDeclaration", "scope": 16372, "src": "1443:12:99", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$16706", "typeString": "contract IERC20" }, "typeName": { "id": 16331, "nodeType": "UserDefinedTypeName", "pathNode": { "id": 16330, "name": "IERC20", "nodeType": "IdentifierPath", "referencedDeclaration": 16706, "src": "1443:6:99" }, "referencedDeclaration": 16706, "src": "1443:6:99", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$16706", "typeString": "contract IERC20" } }, "visibility": "internal" }, { "constant": false, "id": 16334, "mutability": "mutable", "name": "spender", "nameLocation": "1473:7:99", "nodeType": "VariableDeclaration", "scope": 16372, "src": "1465:15:99", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 16333, "name": "address", "nodeType": "ElementaryTypeName", "src": "1465:7:99", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 16336, "mutability": "mutable", "name": "value", "nameLocation": "1498:5:99", "nodeType": "VariableDeclaration", "scope": 16372, "src": "1490:13:99", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 16335, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1490:7:99", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "1433:76:99" }, "returnParameters": { "id": 16338, "nodeType": "ParameterList", "parameters": [], "src": "1519:0:99" }, "scope": 16495, "src": "1413:603:99", "stateMutability": "nonpayable", "virtual": false, "visibility": "internal" }, { "body": { "id": 16407, "nodeType": "Block", "src": "2138:194:99", "statements": [ { "assignments": [ 16383 ], "declarations": [ { "constant": false, "id": 16383, "mutability": "mutable", "name": "newAllowance", "nameLocation": "2156:12:99", "nodeType": "VariableDeclaration", "scope": 16407, "src": "2148:20:99", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 16382, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "2148:7:99", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "id": 16394, "initialValue": { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 16393, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "arguments": [ { "arguments": [ { "id": 16388, "name": "this", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": -28, "src": "2195:4:99", "typeDescriptions": { "typeIdentifier": "t_contract$_SafeERC20_$16495", "typeString": "library SafeERC20" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_contract$_SafeERC20_$16495", "typeString": "library SafeERC20" } ], "id": 16387, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "2187:7:99", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 16386, "name": "address", "nodeType": "ElementaryTypeName", "src": "2187:7:99", "typeDescriptions": {} } }, "id": 16389, "isConstant": false, "isLValue": false, "isPure": false, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2187:13:99", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 16390, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 16377, "src": "2202:7:99", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" } ], "expression": { "id": 16384, "name": "token", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 16375, "src": "2171:5:99", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$16706", "typeString": "contract IERC20" } }, "id": 16385, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "allowance", "nodeType": "MemberAccess", "referencedDeclaration": 16665, "src": "2171:15:99", "typeDescriptions": { "typeIdentifier": "t_function_external_view$_t_address_$_t_address_$returns$_t_uint256_$", "typeString": "function (address,address) view external returns (uint256)" } }, "id": 16391, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2171:39:99", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "+", "rightExpression": { "id": 16392, "name": "value", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 16379, "src": "2213:5:99", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "2171:47:99", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "VariableDeclarationStatement", "src": "2148:70:99" }, { "expression": { "arguments": [ { "id": 16396, "name": "token", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 16375, "src": "2248:5:99", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$16706", "typeString": "contract IERC20" } }, { "arguments": [ { "expression": { "expression": { "id": 16399, "name": "token", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 16375, "src": "2278:5:99", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$16706", "typeString": "contract IERC20" } }, "id": 16400, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "approve", "nodeType": "MemberAccess", "referencedDeclaration": 16675, "src": "2278:13:99", "typeDescriptions": { "typeIdentifier": "t_function_external_nonpayable$_t_address_$_t_uint256_$returns$_t_bool_$", "typeString": "function (address,uint256) external returns (bool)" } }, "id": 16401, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "selector", "nodeType": "MemberAccess", "src": "2278:22:99", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, { "id": 16402, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 16377, "src": "2302:7:99", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 16403, "name": "newAllowance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 16383, "src": "2311:12:99", "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": 16397, "name": "abi", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": -1, "src": "2255:3:99", "typeDescriptions": { "typeIdentifier": "t_magic_abi", "typeString": "abi" } }, "id": 16398, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "memberName": "encodeWithSelector", "nodeType": "MemberAccess", "src": "2255:22:99", "typeDescriptions": { "typeIdentifier": "t_function_abiencodewithselector_pure$_t_bytes4_$returns$_t_bytes_memory_ptr_$", "typeString": "function (bytes4) pure returns (bytes memory)" } }, "id": 16404, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2255:69:99", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_contract$_IERC20_$16706", "typeString": "contract IERC20" }, { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } ], "id": 16395, "name": "_callOptionalReturn", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 16494, "src": "2228:19:99", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_contract$_IERC20_$16706_$_t_bytes_memory_ptr_$returns$__$", "typeString": "function (contract IERC20,bytes memory)" } }, "id": 16405, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2228:97:99", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 16406, "nodeType": "ExpressionStatement", "src": "2228:97:99" } ] }, "id": 16408, "implemented": true, "kind": "function", "modifiers": [], "name": "safeIncreaseAllowance", "nameLocation": "2031:21:99", "nodeType": "FunctionDefinition", "parameters": { "id": 16380, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 16375, "mutability": "mutable", "name": "token", "nameLocation": "2069:5:99", "nodeType": "VariableDeclaration", "scope": 16408, "src": "2062:12:99", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$16706", "typeString": "contract IERC20" }, "typeName": { "id": 16374, "nodeType": "UserDefinedTypeName", "pathNode": { "id": 16373, "name": "IERC20", "nodeType": "IdentifierPath", "referencedDeclaration": 16706, "src": "2062:6:99" }, "referencedDeclaration": 16706, "src": "2062:6:99", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$16706", "typeString": "contract IERC20" } }, "visibility": "internal" }, { "constant": false, "id": 16377, "mutability": "mutable", "name": "spender", "nameLocation": "2092:7:99", "nodeType": "VariableDeclaration", "scope": 16408, "src": "2084:15:99", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 16376, "name": "address", "nodeType": "ElementaryTypeName", "src": "2084:7:99", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 16379, "mutability": "mutable", "name": "value", "nameLocation": "2117:5:99", "nodeType": "VariableDeclaration", "scope": 16408, "src": "2109:13:99", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 16378, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "2109:7:99", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "2052:76:99" }, "returnParameters": { "id": 16381, "nodeType": "ParameterList", "parameters": [], "src": "2138:0:99" }, "scope": 16495, "src": "2022:310:99", "stateMutability": "nonpayable", "virtual": false, "visibility": "internal" }, { "body": { "id": 16455, "nodeType": "Block", "src": "2454:370:99", "statements": [ { "id": 16454, "nodeType": "UncheckedBlock", "src": "2464:354:99", "statements": [ { "assignments": [ 16419 ], "declarations": [ { "constant": false, "id": 16419, "mutability": "mutable", "name": "oldAllowance", "nameLocation": "2496:12:99", "nodeType": "VariableDeclaration", "scope": 16454, "src": "2488:20:99", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 16418, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "2488:7:99", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "id": 16428, "initialValue": { "arguments": [ { "arguments": [ { "id": 16424, "name": "this", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": -28, "src": "2535:4:99", "typeDescriptions": { "typeIdentifier": "t_contract$_SafeERC20_$16495", "typeString": "library SafeERC20" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_contract$_SafeERC20_$16495", "typeString": "library SafeERC20" } ], "id": 16423, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "2527:7:99", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 16422, "name": "address", "nodeType": "ElementaryTypeName", "src": "2527:7:99", "typeDescriptions": {} } }, "id": 16425, "isConstant": false, "isLValue": false, "isPure": false, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2527:13:99", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 16426, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 16413, "src": "2542:7:99", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" } ], "expression": { "id": 16420, "name": "token", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 16411, "src": "2511:5:99", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$16706", "typeString": "contract IERC20" } }, "id": 16421, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "allowance", "nodeType": "MemberAccess", "referencedDeclaration": 16665, "src": "2511:15:99", "typeDescriptions": { "typeIdentifier": "t_function_external_view$_t_address_$_t_address_$returns$_t_uint256_$", "typeString": "function (address,address) view external returns (uint256)" } }, "id": 16427, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2511:39:99", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "VariableDeclarationStatement", "src": "2488:62:99" }, { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 16432, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 16430, "name": "oldAllowance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 16419, "src": "2572:12:99", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": ">=", "rightExpression": { "id": 16431, "name": "value", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 16415, "src": "2588:5:99", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "2572:21:99", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "5361666545524332303a2064656372656173656420616c6c6f77616e63652062656c6f77207a65726f", "id": 16433, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "2595:43:99", "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": 16429, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ -18, -18 ], "referencedDeclaration": -18, "src": "2564:7:99", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 16434, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2564:75:99", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 16435, "nodeType": "ExpressionStatement", "src": "2564:75:99" }, { "assignments": [ 16437 ], "declarations": [ { "constant": false, "id": 16437, "mutability": "mutable", "name": "newAllowance", "nameLocation": "2661:12:99", "nodeType": "VariableDeclaration", "scope": 16454, "src": "2653:20:99", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 16436, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "2653:7:99", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "id": 16441, "initialValue": { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 16440, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 16438, "name": "oldAllowance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 16419, "src": "2676:12:99", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "-", "rightExpression": { "id": 16439, "name": "value", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 16415, "src": "2691:5:99", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "2676:20:99", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "VariableDeclarationStatement", "src": "2653:43:99" }, { "expression": { "arguments": [ { "id": 16443, "name": "token", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 16411, "src": "2730:5:99", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$16706", "typeString": "contract IERC20" } }, { "arguments": [ { "expression": { "expression": { "id": 16446, "name": "token", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 16411, "src": "2760:5:99", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$16706", "typeString": "contract IERC20" } }, "id": 16447, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "approve", "nodeType": "MemberAccess", "referencedDeclaration": 16675, "src": "2760:13:99", "typeDescriptions": { "typeIdentifier": "t_function_external_nonpayable$_t_address_$_t_uint256_$returns$_t_bool_$", "typeString": "function (address,uint256) external returns (bool)" } }, "id": 16448, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "selector", "nodeType": "MemberAccess", "src": "2760:22:99", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, { "id": 16449, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 16413, "src": "2784:7:99", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 16450, "name": "newAllowance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 16437, "src": "2793:12:99", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" 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"isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3819:30:99", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "5361666545524332303a204552433230206f7065726174696f6e20646964206e6f742073756363656564", "id": 16488, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "3851:44:99", "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": 16480, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ -18, -18 ], "referencedDeclaration": -18, "src": "3811:7:99", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 16489, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3811:85:99", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 16490, "nodeType": "ExpressionStatement", "src": "3811:85:99" } ] } } ] }, "documentation": { "id": 16457, "nodeType": "StructuredDocumentation", "src": "2830:372:99", "text": " @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement\n on the return value: the return value is optional (but if data is returned, it must not be false).\n @param token The token targeted by the call.\n @param data The call data (encoded using abi.encode or one of its variants)." }, "id": 16494, "implemented": true, "kind": "function", "modifiers": [], "name": "_callOptionalReturn", "nameLocation": "3216:19:99", "nodeType": "FunctionDefinition", "parameters": { "id": 16463, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 16460, "mutability": "mutable", "name": "token", "nameLocation": "3243:5:99", "nodeType": "VariableDeclaration", "scope": 16494, "src": "3236:12:99", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$16706", "typeString": "contract IERC20" }, "typeName": { "id": 16459, "nodeType": "UserDefinedTypeName", "pathNode": { "id": 16458, "name": "IERC20", "nodeType": "IdentifierPath", "referencedDeclaration": 16706, "src": "3236:6:99" }, "referencedDeclaration": 16706, "src": "3236:6:99", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$16706", "typeString": "contract IERC20" } }, "visibility": "internal" }, { "constant": false, "id": 16462, "mutability": "mutable", "name": "data", "nameLocation": "3263:4:99", "nodeType": "VariableDeclaration", "scope": 16494, "src": "3250:17:99", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 16461, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "3250:5:99", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "visibility": "internal" } ], "src": "3235:33:99" }, "returnParameters": { "id": 16464, "nodeType": "ParameterList", "parameters": [], "src": "3277:0:99" }, "scope": 16495, "src": "3207:706:99", "stateMutability": "nonpayable", "virtual": false, "visibility": "private" } ], "scope": 16496, "src": "645:3270:99", "usedErrors": [] } ], "src": "100:3816:99" }, "bytecode": "60566037600b82828239805160001a607314602a57634e487b7160e01b600052600060045260246000fd5b30600052607381538281f3fe73000000000000000000000000000000000000000030146080604052600080fdfea2646970667358221220c56ff17bffc93cf0be86f17ee4f4629b01f5af3645485ca2d7dba1b64ded966164736f6c63430008060033", "bytecodeSha1": "1ce946f6a4eaa185320328620ccf999b9e86db7c", "compiler": { "evm_version": "istanbul", "optimizer": { "enabled": true, "runs": 200 }, "version": "0.8.6+commit.11564f7e" }, "contractName": "SafeERC20", "coverageMap": { "branches": { "104": {}, "97": {}, "99": {} }, "statements": { "104": {}, "97": {}, "99": {} } }, "dependencies": [ "Address", "IERC20" ], "deployedBytecode": "73000000000000000000000000000000000000000030146080604052600080fdfea2646970667358221220c56ff17bffc93cf0be86f17ee4f4629b01f5af3645485ca2d7dba1b64ded966164736f6c63430008060033", "deployedSourceMap": "645:3270:99:-:0;;;;;;;;", "language": "Solidity", "natspec": { "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 }, "offset": [ 645, 3915 ], "opcodes": "PUSH20 0x0 ADDRESS EQ PUSH1 0x80 PUSH1 0x40 MSTORE PUSH1 0x0 DUP1 REVERT INVALID LOG2 PUSH5 0x6970667358 0x22 SLT KECCAK256 0xC5 PUSH16 0xF17BFFC93CF0BE86F17EE4F4629B01F5 0xAF CALLDATASIZE GASLIMIT 0x48 0x5C LOG2 0xD7 0xDB LOG1 0xB6 0x4D 0xED SWAP7 PUSH2 0x6473 PUSH16 0x6C634300080600330000000000000000 ", "pcMap": { "0": { "offset": [ 645, 3915 ], "op": "PUSH20", "path": "99", "value": "0x0" }, "21": { "fn": null, "offset": [ 645, 3915 ], "op": "ADDRESS", "path": "99" }, "22": { "fn": null, "offset": [ 645, 3915 ], "op": "EQ", "path": "99" }, "23": { "fn": null, "offset": [ 645, 3915 ], "op": "PUSH1", "path": "99", "value": "0x80" }, "25": { "fn": null, "offset": [ 645, 3915 ], "op": "PUSH1", "path": "99", "value": "0x40" }, "27": { "fn": null, "offset": [ 645, 3915 ], "op": "MSTORE", "path": "99" }, "28": { "fn": null, "offset": [ 645, 3915 ], "op": "PUSH1", "path": "99", "value": "0x0" }, "30": { "fn": null, "offset": [ 645, 3915 ], "op": "DUP1", "path": "99" }, "31": { "fn": null, "offset": [ 645, 3915 ], "op": "REVERT", "path": "99" } }, "sha1": "864f1a5d74895e31b3bddbb7ce8cef1cb6647543", "source": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (token/ERC20/utils/SafeERC20.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../IERC20.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 /**\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", "sourceMap": "645:3270:99:-:0;;;;;;;;;;;;;;;-1:-1:-1;;;645:3270:99;;;;;;;;;;;;;;;;;", "sourcePath": "node_modules/@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol", "type": "library" }