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"linkReferences": {} }, "userdoc": { "version": 1, "kind": "user" }, "devdoc": { "version": 1, "kind": "dev", "details": "Implementation of the {IERC20} interface. This implementation is agnostic to the way tokens are created. This means that a supply mechanism has to be added in a derived contract using {_mint}. For a generic mechanism see {ERC20PresetMinterPauser}. TIP: For a detailed writeup see our guide https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How to implement supply mechanisms]. We have followed general OpenZeppelin Contracts guidelines: functions revert instead returning `false` on failure. This behavior is nonetheless conventional and does not conflict with the expectations of ERC20 applications. Additionally, an {Approval} event is emitted on calls to {transferFrom}. This allows applications to reconstruct the allowance for all accounts just by listening to said events. Other implementations of the EIP may not emit these events, as it isn't required by the specification. Finally, the non-standard {decreaseAllowance} and {increaseAllowance} functions have been added to mitigate the well-known issues around setting allowances. See {IERC20-approve}.", "methods": { "allowance(address,address)": { "details": "See {IERC20-allowance}." }, "approve(address,uint256)": { "details": "See {IERC20-approve}. NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on `transferFrom`. This is semantically equivalent to an infinite approval. Requirements: - `spender` cannot be the zero address." }, "balanceOf(address)": { "details": "See {IERC20-balanceOf}." }, "constructor": { "details": "Sets the values for {name} and {symbol}. The default value of {decimals} is 18. To select a different value for {decimals} you should overload it. All two of these values are immutable: they can only be set once during construction." }, "decimals()": { "details": "Returns the number of decimals used to get its user representation. For example, if `decimals` equals `2`, a balance of `505` tokens should be displayed to a user as `5.05` (`505 / 10 ** 2`). Tokens usually opt for a value of 18, imitating the relationship between Ether and Wei. This is the value {ERC20} uses, unless this function is overridden; NOTE: This information is only used for _display_ purposes: it in no way affects any of the arithmetic of the contract, including {IERC20-balanceOf} and {IERC20-transfer}." }, "decreaseAllowance(address,uint256)": { "details": "Atomically decreases the allowance granted to `spender` by the caller. This is an alternative to {approve} that can be used as a mitigation for problems described in {IERC20-approve}. Emits an {Approval} event indicating the updated allowance. Requirements: - `spender` cannot be the zero address. - `spender` must have allowance for the caller of at least `subtractedValue`." }, "increaseAllowance(address,uint256)": { "details": "Atomically increases the allowance granted to `spender` by the caller. This is an alternative to {approve} that can be used as a mitigation for problems described in {IERC20-approve}. Emits an {Approval} event indicating the updated allowance. Requirements: - `spender` cannot be the zero address." }, "name()": { "details": "Returns the name of the token." }, "symbol()": { "details": "Returns the symbol of the token, usually a shorter version of the name." }, "totalSupply()": { "details": "See {IERC20-totalSupply}." }, "transfer(address,uint256)": { "details": "See {IERC20-transfer}. Requirements: - `to` cannot be the zero address. - the caller must have a balance of at least `amount`." }, "transferFrom(address,address,uint256)": { "details": "See {IERC20-transferFrom}. Emits an {Approval} event indicating the updated allowance. This is not required by the EIP. See the note at the beginning of {ERC20}. NOTE: Does not update the allowance if the current allowance is the maximum `uint256`. Requirements: - `from` and `to` cannot be the zero address. - `from` must have a balance of at least `amount`. - the caller must have allowance for ``from``'s tokens of at least `amount`." } } }, "ast": { "absolutePath": "/Users/evanconrad/dev/src/strangemoodfoundation/strangemood-eth/lib/openzeppelin-contracts/contracts/token/ERC20/ERC20.sol", "exportedSymbols": { "Context": [ 2404 ], "ERC20": [ 690 ], "IERC20": [ 768 ], "IERC20Metadata": [ 793 ] }, "id": 691, "license": "MIT", "nodeType": "SourceUnit", "nodes": [ { "id": 106, "literals": [ "solidity", "^", "0.8", ".0" ], "nodeType": "PragmaDirective", "src": "105:23:1" }, { "absolutePath": "/Users/evanconrad/dev/src/strangemoodfoundation/strangemood-eth/lib/openzeppelin-contracts/contracts/token/ERC20/IERC20.sol", "file": "./IERC20.sol", "id": 107, "nameLocation": "-1:-1:-1", "nodeType": "ImportDirective", "scope": 691, "sourceUnit": 769, "src": "130:22:1", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "/Users/evanconrad/dev/src/strangemoodfoundation/strangemood-eth/lib/openzeppelin-contracts/contracts/token/ERC20/extensions/IERC20Metadata.sol", "file": "./extensions/IERC20Metadata.sol", "id": 108, "nameLocation": "-1:-1:-1", "nodeType": "ImportDirective", "scope": 691, "sourceUnit": 794, "src": "153:41:1", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "/Users/evanconrad/dev/src/strangemoodfoundation/strangemood-eth/lib/openzeppelin-contracts/contracts/utils/Context.sol", "file": "../../utils/Context.sol", "id": 109, "nameLocation": "-1:-1:-1", "nodeType": "ImportDirective", "scope": 691, "sourceUnit": 2405, "src": "195:33:1", "symbolAliases": [], "unitAlias": "" }, { "abstract": false, "baseContracts": [ { "baseName": { "id": 111, "name": "Context", "nodeType": "IdentifierPath", "referencedDeclaration": 2404, "src": "1421:7:1" }, "id": 112, "nodeType": "InheritanceSpecifier", "src": "1421:7:1" }, { "baseName": { "id": 113, "name": "IERC20", "nodeType": "IdentifierPath", "referencedDeclaration": 768, "src": "1430:6:1" }, "id": 114, "nodeType": "InheritanceSpecifier", "src": "1430:6:1" }, { "baseName": { "id": 115, "name": "IERC20Metadata", "nodeType": "IdentifierPath", "referencedDeclaration": 793, "src": "1438:14:1" }, "id": 116, "nodeType": "InheritanceSpecifier", "src": "1438:14:1" } ], "canonicalName": "ERC20", "contractDependencies": [], "contractKind": "contract", "documentation": { "id": 110, "nodeType": "StructuredDocumentation", "src": "230:1172:1", "text": " @dev Implementation of the {IERC20} interface.\n This implementation is agnostic to the way tokens are created. This means\n that a supply mechanism has to be added in a derived contract using {_mint}.\n For a generic mechanism see {ERC20PresetMinterPauser}.\n TIP: For a detailed writeup see our guide\n https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How\n to implement supply mechanisms].\n We have followed general OpenZeppelin Contracts guidelines: functions revert\n instead returning `false` on failure. This behavior is nonetheless\n conventional and does not conflict with the expectations of ERC20\n applications.\n Additionally, an {Approval} event is emitted on calls to {transferFrom}.\n This allows applications to reconstruct the allowance for all accounts just\n by listening to said events. Other implementations of the EIP may not emit\n these events, as it isn't required by the specification.\n Finally, the non-standard {decreaseAllowance} and {increaseAllowance}\n functions have been added to mitigate the well-known issues around setting\n allowances. See {IERC20-approve}." }, "fullyImplemented": true, "id": 690, "linearizedBaseContracts": [ 690, 793, 768, 2404 ], "name": "ERC20", "nameLocation": "1412:5:1", "nodeType": "ContractDefinition", "nodes": [ { "constant": false, "id": 120, "mutability": "mutable", "name": "_balances", "nameLocation": "1495:9:1", "nodeType": "VariableDeclaration", "scope": 690, "src": "1459:45:1", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" }, "typeName": { "id": 119, "keyType": { "id": 117, "name": "address", "nodeType": "ElementaryTypeName", "src": "1467:7:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Mapping", "src": "1459:27:1", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" }, "valueType": { "id": 118, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1478:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } }, "visibility": "private" }, { "constant": false, "id": 126, "mutability": "mutable", "name": "_allowances", "nameLocation": "1567:11:1", "nodeType": "VariableDeclaration", "scope": 690, "src": "1511:67:1", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" }, "typeName": { "id": 125, "keyType": { "id": 121, "name": "address", "nodeType": "ElementaryTypeName", "src": "1519:7:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Mapping", "src": "1511:47:1", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" }, "valueType": { "id": 124, "keyType": { "id": 122, "name": "address", "nodeType": "ElementaryTypeName", "src": "1538:7:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Mapping", "src": "1530:27:1", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" }, "valueType": { "id": 123, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1549:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } } }, "visibility": "private" }, { "constant": false, "id": 128, "mutability": "mutable", "name": "_totalSupply", "nameLocation": "1601:12:1", "nodeType": "VariableDeclaration", "scope": 690, "src": "1585:28:1", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 127, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1585:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "private" }, { "constant": false, "id": 130, "mutability": "mutable", "name": "_name", "nameLocation": "1635:5:1", "nodeType": "VariableDeclaration", "scope": 690, "src": "1620:20:1", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_string_storage", "typeString": "string" }, "typeName": { "id": 129, "name": "string", "nodeType": "ElementaryTypeName", "src": "1620:6:1", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "visibility": "private" }, { "constant": false, "id": 132, "mutability": "mutable", "name": "_symbol", "nameLocation": "1661:7:1", "nodeType": "VariableDeclaration", "scope": 690, "src": "1646:22:1", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_string_storage", "typeString": "string" }, "typeName": { "id": 131, "name": "string", "nodeType": "ElementaryTypeName", "src": "1646:6:1", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "visibility": "private" }, { "body": { "id": 148, "nodeType": "Block", "src": "2034:57:1", "statements": [ { "expression": { "id": 142, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "id": 140, "name": "_name", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 130, "src": "2044:5:1", "typeDescriptions": { "typeIdentifier": "t_string_storage", "typeString": "string storage ref" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "id": 141, "name": "name_", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 135, "src": "2052:5:1", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string memory" } }, "src": "2044:13:1", "typeDescriptions": { "typeIdentifier": "t_string_storage", "typeString": "string storage ref" } }, "id": 143, "nodeType": "ExpressionStatement", "src": "2044:13:1" }, { "expression": { "id": 146, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "id": 144, "name": "_symbol", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 132, "src": "2067:7:1", "typeDescriptions": { "typeIdentifier": "t_string_storage", "typeString": "string storage ref" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "id": 145, "name": "symbol_", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 137, "src": "2077:7:1", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string memory" } }, "src": "2067:17:1", "typeDescriptions": { "typeIdentifier": "t_string_storage", "typeString": "string storage ref" } }, "id": 147, "nodeType": "ExpressionStatement", "src": "2067:17:1" } ] }, "documentation": { "id": 133, "nodeType": "StructuredDocumentation", "src": "1675:298:1", "text": " @dev Sets the values for {name} and {symbol}.\n The default value of {decimals} is 18. To select a different value for\n {decimals} you should overload it.\n All two of these values are immutable: they can only be set once during\n construction." }, "id": 149, "implemented": true, "kind": "constructor", "modifiers": [], "name": "", "nameLocation": "-1:-1:-1", "nodeType": "FunctionDefinition", "parameters": { "id": 138, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 135, "mutability": "mutable", "name": "name_", "nameLocation": "2004:5:1", "nodeType": "VariableDeclaration", "scope": 149, "src": "1990:19:1", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string" }, "typeName": { "id": 134, "name": "string", "nodeType": "ElementaryTypeName", "src": "1990:6:1", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "visibility": "internal" }, { "constant": false, "id": 137, "mutability": "mutable", "name": "symbol_", "nameLocation": "2025:7:1", "nodeType": "VariableDeclaration", "scope": 149, "src": "2011:21:1", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string" }, "typeName": { "id": 136, "name": "string", "nodeType": "ElementaryTypeName", "src": "2011:6:1", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "visibility": "internal" } ], "src": "1989:44:1" }, "returnParameters": { "id": 139, "nodeType": "ParameterList", "parameters": [], "src": "2034:0:1" }, "scope": 690, "src": "1978:113:1", "stateMutability": "nonpayable", "virtual": false, "visibility": "public" }, { "baseFunctions": [ 780 ], "body": { "id": 158, "nodeType": "Block", "src": "2225:29:1", "statements": [ { "expression": { "id": 156, "name": "_name", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 130, "src": "2242:5:1", "typeDescriptions": { "typeIdentifier": "t_string_storage", "typeString": "string storage ref" } }, "functionReturnParameters": 155, "id": 157, "nodeType": "Return", "src": "2235:12:1" } ] }, "documentation": { "id": 150, "nodeType": "StructuredDocumentation", "src": "2097:54:1", "text": " @dev Returns the name of the token." }, "functionSelector": "06fdde03", "id": 159, "implemented": true, "kind": "function", "modifiers": [], "name": "name", "nameLocation": "2165:4:1", "nodeType": "FunctionDefinition", "overrides": { "id": 152, "nodeType": "OverrideSpecifier", "overrides": [], "src": "2192:8:1" }, "parameters": { "id": 151, "nodeType": "ParameterList", "parameters": [], "src": "2169:2:1" }, "returnParameters": { "id": 155, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 154, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 159, "src": "2210:13:1", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string" }, "typeName": { "id": 153, "name": "string", "nodeType": "ElementaryTypeName", "src": "2210:6:1", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "visibility": "internal" } ], "src": "2209:15:1" }, "scope": 690, "src": "2156:98:1", "stateMutability": "view", "virtual": true, "visibility": "public" }, { "baseFunctions": [ 786 ], "body": { "id": 168, "nodeType": "Block", "src": "2438:31:1", "statements": [ { "expression": { "id": 166, "name": "_symbol", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 132, "src": "2455:7:1", "typeDescriptions": { "typeIdentifier": "t_string_storage", "typeString": "string storage ref" } }, "functionReturnParameters": 165, "id": 167, "nodeType": "Return", "src": "2448:14:1" } ] }, "documentation": { "id": 160, "nodeType": "StructuredDocumentation", "src": "2260:102:1", "text": " @dev Returns the symbol of the token, usually a shorter version of the\n name." }, "functionSelector": "95d89b41", "id": 169, "implemented": true, "kind": "function", "modifiers": [], "name": "symbol", "nameLocation": "2376:6:1", "nodeType": "FunctionDefinition", "overrides": { "id": 162, "nodeType": "OverrideSpecifier", "overrides": [], "src": "2405:8:1" }, "parameters": { "id": 161, "nodeType": "ParameterList", "parameters": [], "src": "2382:2:1" }, "returnParameters": { "id": 165, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 164, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 169, "src": "2423:13:1", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string" }, "typeName": { "id": 163, "name": "string", "nodeType": "ElementaryTypeName", "src": "2423:6:1", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "visibility": "internal" } ], "src": "2422:15:1" }, "scope": 690, "src": "2367:102:1", "stateMutability": "view", "virtual": true, "visibility": "public" }, { "baseFunctions": [ 792 ], "body": { "id": 178, "nodeType": "Block", "src": "3158:26:1", "statements": [ { "expression": { "hexValue": "3138", "id": 176, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "3175:2:1", "typeDescriptions": { "typeIdentifier": "t_rational_18_by_1", "typeString": "int_const 18" }, "value": "18" }, "functionReturnParameters": 175, "id": 177, "nodeType": "Return", "src": "3168:9:1" } ] }, "documentation": { "id": 170, "nodeType": "StructuredDocumentation", "src": "2475:613:1", "text": " @dev Returns the number of decimals used to get its user representation.\n For example, if `decimals` equals `2`, a balance of `505` tokens should\n be displayed to a user as `5.05` (`505 / 10 ** 2`).\n Tokens usually opt for a value of 18, imitating the relationship between\n Ether and Wei. This is the value {ERC20} uses, unless this function is\n overridden;\n NOTE: This information is only used for _display_ purposes: it in\n no way affects any of the arithmetic of the contract, including\n {IERC20-balanceOf} and {IERC20-transfer}." }, "functionSelector": "313ce567", "id": 179, "implemented": true, "kind": "function", "modifiers": [], "name": "decimals", "nameLocation": "3102:8:1", "nodeType": "FunctionDefinition", "overrides": { "id": 172, "nodeType": "OverrideSpecifier", "overrides": [], "src": "3133:8:1" }, "parameters": { "id": 171, "nodeType": "ParameterList", "parameters": [], "src": "3110:2:1" }, "returnParameters": { "id": 175, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 174, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 179, "src": "3151:5:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" }, "typeName": { "id": 173, "name": "uint8", "nodeType": "ElementaryTypeName", "src": "3151:5:1", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "visibility": "internal" } ], "src": "3150:7:1" }, "scope": 690, "src": "3093:91:1", "stateMutability": "view", "virtual": true, "visibility": "public" }, { "baseFunctions": [ 717 ], "body": { "id": 188, "nodeType": "Block", "src": "3314:36:1", "statements": [ { "expression": { "id": 186, "name": "_totalSupply", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 128, "src": "3331:12:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "functionReturnParameters": 185, "id": 187, "nodeType": "Return", "src": "3324:19:1" } ] }, "documentation": { "id": 180, "nodeType": "StructuredDocumentation", "src": "3190:49:1", "text": " @dev See {IERC20-totalSupply}." }, "functionSelector": "18160ddd", "id": 189, "implemented": true, "kind": "function", "modifiers": [], "name": "totalSupply", "nameLocation": "3253:11:1", "nodeType": "FunctionDefinition", "overrides": { "id": 182, "nodeType": "OverrideSpecifier", "overrides": [], "src": "3287:8:1" }, "parameters": { "id": 181, "nodeType": "ParameterList", "parameters": [], "src": "3264:2:1" }, "returnParameters": { "id": 185, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 184, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 189, "src": "3305:7:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 183, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3305:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "3304:9:1" }, "scope": 690, "src": "3244:106:1", "stateMutability": "view", "virtual": true, "visibility": "public" }, { "baseFunctions": [ 725 ], "body": { "id": 202, "nodeType": "Block", "src": "3491:42:1", "statements": [ { "expression": { "baseExpression": { "id": 198, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 120, "src": "3508:9:1", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 200, "indexExpression": { "id": 199, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 192, "src": "3518:7:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "3508:18:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "functionReturnParameters": 197, "id": 201, "nodeType": "Return", "src": "3501:25:1" } ] }, "documentation": { "id": 190, "nodeType": "StructuredDocumentation", "src": "3356:47:1", "text": " @dev See {IERC20-balanceOf}." }, "functionSelector": "70a08231", "id": 203, "implemented": true, "kind": "function", "modifiers": [], "name": "balanceOf", "nameLocation": "3417:9:1", "nodeType": "FunctionDefinition", "overrides": { "id": 194, "nodeType": "OverrideSpecifier", "overrides": [], "src": "3464:8:1" }, "parameters": { "id": 193, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 192, "mutability": "mutable", "name": "account", "nameLocation": "3435:7:1", "nodeType": "VariableDeclaration", "scope": 203, "src": "3427:15:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 191, "name": "address", "nodeType": "ElementaryTypeName", "src": "3427:7:1", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" } ], "src": "3426:17:1" }, "returnParameters": { "id": 197, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 196, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 203, "src": "3482:7:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 195, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3482:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "3481:9:1" }, "scope": 690, "src": "3408:125:1", "stateMutability": "view", "virtual": true, "visibility": "public" }, { "baseFunctions": [ 735 ], "body": { "id": 227, "nodeType": "Block", "src": "3814:104:1", "statements": [ { "assignments": [ 215 ], "declarations": [ { "constant": false, "id": 215, "mutability": "mutable", "name": "owner", "nameLocation": "3832:5:1", "nodeType": "VariableDeclaration", "scope": 227, "src": "3824:13:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 214, "name": "address", "nodeType": "ElementaryTypeName", "src": "3824:7:1", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" } ], "id": 218, "initialValue": { "arguments": [], "expression": { "argumentTypes": [], "id": 216, "name": "_msgSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2394, "src": "3840:10:1", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_address_$", "typeString": "function () view returns (address)" } }, "id": 217, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3840:12:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "VariableDeclarationStatement", "src": "3824:28:1" }, { "expression": { "arguments": [ { "id": 220, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 215, "src": "3872:5:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 221, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 206, "src": "3879:2:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 222, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 208, "src": "3883:6:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 219, "name": "_transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 451, "src": "3862:9:1", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 223, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3862:28:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 224, "nodeType": "ExpressionStatement", "src": "3862:28:1" }, { "expression": { "hexValue": "74727565", "id": 225, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "3907:4:1", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "functionReturnParameters": 213, "id": 226, "nodeType": "Return", "src": "3900:11:1" } ] }, "documentation": { "id": 204, "nodeType": "StructuredDocumentation", "src": "3539:185:1", "text": " @dev See {IERC20-transfer}.\n Requirements:\n - `to` cannot be the zero address.\n - the caller must have a balance of at least `amount`." }, "functionSelector": "a9059cbb", "id": 228, "implemented": true, "kind": "function", "modifiers": [], "name": "transfer", "nameLocation": "3738:8:1", "nodeType": "FunctionDefinition", "overrides": { "id": 210, "nodeType": "OverrideSpecifier", "overrides": [], "src": "3790:8:1" }, "parameters": { "id": 209, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 206, "mutability": "mutable", "name": "to", "nameLocation": "3755:2:1", "nodeType": "VariableDeclaration", "scope": 228, "src": "3747:10:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 205, "name": "address", "nodeType": "ElementaryTypeName", "src": "3747:7:1", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 208, "mutability": "mutable", "name": "amount", "nameLocation": "3767:6:1", "nodeType": "VariableDeclaration", "scope": 228, "src": "3759:14:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 207, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3759:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "3746:28:1" }, "returnParameters": { "id": 213, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 212, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 228, "src": "3808:4:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 211, "name": "bool", "nodeType": "ElementaryTypeName", "src": "3808:4:1", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "visibility": "internal" } ], "src": "3807:6:1" }, "scope": 690, "src": "3729:189:1", "stateMutability": "nonpayable", "virtual": true, "visibility": "public" }, { "baseFunctions": [ 745 ], "body": { "id": 245, "nodeType": "Block", "src": "4074:51:1", "statements": [ { "expression": { "baseExpression": { "baseExpression": { "id": 239, "name": "_allowances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 126, "src": "4091:11:1", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" } }, "id": 241, "indexExpression": { "id": 240, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 231, "src": "4103:5:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "4091:18:1", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 243, "indexExpression": { "id": 242, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 233, "src": "4110:7:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "4091:27:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "functionReturnParameters": 238, "id": 244, "nodeType": "Return", "src": "4084:34:1" } ] }, "documentation": { "id": 229, "nodeType": "StructuredDocumentation", "src": "3924:47:1", "text": " @dev See {IERC20-allowance}." }, "functionSelector": "dd62ed3e", "id": 246, "implemented": true, "kind": "function", "modifiers": [], "name": "allowance", "nameLocation": "3985:9:1", "nodeType": "FunctionDefinition", "overrides": { "id": 235, "nodeType": "OverrideSpecifier", "overrides": [], "src": "4047:8:1" }, "parameters": { "id": 234, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 231, "mutability": "mutable", "name": "owner", "nameLocation": "4003:5:1", "nodeType": "VariableDeclaration", "scope": 246, "src": "3995:13:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 230, "name": "address", "nodeType": "ElementaryTypeName", "src": "3995:7:1", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 233, "mutability": "mutable", "name": "spender", "nameLocation": "4018:7:1", "nodeType": "VariableDeclaration", "scope": 246, "src": "4010:15:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 232, "name": "address", "nodeType": "ElementaryTypeName", "src": "4010:7:1", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" } ], "src": "3994:32:1" }, "returnParameters": { "id": 238, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 237, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 246, "src": "4065:7:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 236, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "4065:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "4064:9:1" }, "scope": 690, "src": "3976:149:1", "stateMutability": "view", "virtual": true, "visibility": "public" }, { "baseFunctions": [ 755 ], "body": { "id": 270, "nodeType": "Block", "src": "4522:108:1", "statements": [ { "assignments": [ 258 ], "declarations": [ { "constant": false, "id": 258, "mutability": "mutable", "name": "owner", "nameLocation": "4540:5:1", "nodeType": "VariableDeclaration", "scope": 270, "src": "4532:13:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 257, "name": "address", "nodeType": "ElementaryTypeName", "src": "4532:7:1", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" } ], "id": 261, "initialValue": { "arguments": [], "expression": { "argumentTypes": [], "id": 259, "name": "_msgSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2394, "src": "4548:10:1", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_address_$", "typeString": "function () view returns (address)" } }, "id": 260, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4548:12:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "VariableDeclarationStatement", "src": "4532:28:1" }, { "expression": { "arguments": [ { "id": 263, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 258, "src": "4579:5:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 264, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 249, "src": "4586:7:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 265, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 251, "src": "4595:6:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 262, "name": "_approve", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 624, "src": "4570:8:1", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 266, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4570:32:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 267, "nodeType": "ExpressionStatement", "src": "4570:32:1" }, { "expression": { "hexValue": "74727565", "id": 268, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "4619:4:1", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "functionReturnParameters": 256, "id": 269, "nodeType": "Return", "src": "4612:11:1" } ] }, "documentation": { "id": 247, "nodeType": "StructuredDocumentation", "src": "4131:297:1", "text": " @dev See {IERC20-approve}.\n NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on\n `transferFrom`. This is semantically equivalent to an infinite approval.\n Requirements:\n - `spender` cannot be the zero address." }, "functionSelector": "095ea7b3", "id": 271, "implemented": true, "kind": "function", "modifiers": [], "name": "approve", "nameLocation": "4442:7:1", "nodeType": "FunctionDefinition", "overrides": { "id": 253, "nodeType": "OverrideSpecifier", "overrides": [], "src": "4498:8:1" }, "parameters": { "id": 252, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 249, "mutability": "mutable", "name": "spender", "nameLocation": "4458:7:1", "nodeType": "VariableDeclaration", "scope": 271, "src": "4450:15:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 248, "name": "address", "nodeType": "ElementaryTypeName", "src": "4450:7:1", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 251, "mutability": "mutable", "name": "amount", "nameLocation": "4475:6:1", "nodeType": "VariableDeclaration", "scope": 271, "src": "4467:14:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 250, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "4467:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "4449:33:1" }, "returnParameters": { "id": 256, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 255, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 271, "src": "4516:4:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 254, "name": "bool", "nodeType": "ElementaryTypeName", "src": "4516:4:1", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "visibility": "internal" } ], "src": "4515:6:1" }, "scope": 690, "src": "4433:197:1", "stateMutability": "nonpayable", "virtual": true, "visibility": "public" }, { "baseFunctions": [ 767 ], "body": { "id": 303, "nodeType": "Block", "src": "5325:153:1", "statements": [ { "assignments": [ 285 ], "declarations": [ { "constant": false, "id": 285, "mutability": "mutable", "name": "spender", "nameLocation": "5343:7:1", "nodeType": "VariableDeclaration", "scope": 303, "src": "5335:15:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 284, "name": "address", "nodeType": "ElementaryTypeName", "src": "5335:7:1", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" } ], "id": 288, "initialValue": { "arguments": [], "expression": { "argumentTypes": [], "id": 286, "name": "_msgSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2394, "src": "5353:10:1", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_address_$", "typeString": "function () view returns (address)" } }, "id": 287, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5353:12:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "VariableDeclarationStatement", "src": "5335:30:1" }, { "expression": { "arguments": [ { "id": 290, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 274, "src": "5391:4:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 291, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 285, "src": "5397:7:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 292, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 278, "src": "5406:6:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 289, "name": "_spendAllowance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 667, "src": "5375:15:1", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 293, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5375:38:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 294, "nodeType": "ExpressionStatement", "src": "5375:38:1" }, { "expression": { "arguments": [ { "id": 296, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 274, "src": "5433:4:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 297, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 276, "src": "5439:2:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 298, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 278, "src": "5443:6:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 295, "name": "_transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 451, "src": "5423:9:1", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 299, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5423:27:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 300, "nodeType": "ExpressionStatement", "src": "5423:27:1" }, { "expression": { "hexValue": "74727565", "id": 301, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "5467:4:1", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "functionReturnParameters": 283, "id": 302, "nodeType": "Return", "src": "5460:11:1" } ] }, "documentation": { "id": 272, "nodeType": "StructuredDocumentation", "src": "4636:551:1", "text": " @dev See {IERC20-transferFrom}.\n Emits an {Approval} event indicating the updated allowance. This is not\n required by the EIP. See the note at the beginning of {ERC20}.\n NOTE: Does not update the allowance if the current allowance\n is the maximum `uint256`.\n Requirements:\n - `from` and `to` cannot be the zero address.\n - `from` must have a balance of at least `amount`.\n - the caller must have allowance for ``from``'s tokens of at least\n `amount`." }, "functionSelector": "23b872dd", "id": 304, "implemented": true, "kind": "function", "modifiers": [], "name": "transferFrom", "nameLocation": "5201:12:1", "nodeType": "FunctionDefinition", "overrides": { "id": 280, "nodeType": "OverrideSpecifier", "overrides": [], "src": "5301:8:1" }, "parameters": { "id": 279, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 274, "mutability": "mutable", "name": "from", "nameLocation": "5231:4:1", "nodeType": "VariableDeclaration", "scope": 304, "src": "5223:12:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 273, "name": "address", "nodeType": "ElementaryTypeName", "src": "5223:7:1", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 276, "mutability": "mutable", "name": "to", "nameLocation": "5253:2:1", "nodeType": "VariableDeclaration", "scope": 304, "src": "5245:10:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 275, "name": "address", "nodeType": "ElementaryTypeName", "src": "5245:7:1", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 278, "mutability": "mutable", "name": "amount", "nameLocation": "5273:6:1", "nodeType": "VariableDeclaration", "scope": 304, "src": "5265:14:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 277, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "5265:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "5213:72:1" }, "returnParameters": { "id": 283, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 282, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 304, "src": "5319:4:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 281, "name": "bool", "nodeType": "ElementaryTypeName", "src": "5319:4:1", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "visibility": "internal" } ], "src": "5318:6:1" }, "scope": 690, "src": "5192:286:1", "stateMutability": "nonpayable", "virtual": true, "visibility": "public" }, { "body": { "id": 332, "nodeType": "Block", "src": "5967:140:1", "statements": [ { "assignments": [ 315 ], "declarations": [ { "constant": false, "id": 315, "mutability": "mutable", "name": "owner", "nameLocation": "5985:5:1", "nodeType": "VariableDeclaration", "scope": 332, "src": "5977:13:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 314, "name": "address", "nodeType": "ElementaryTypeName", "src": "5977:7:1", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" } ], "id": 318, "initialValue": { "arguments": [], "expression": { "argumentTypes": [], "id": 316, "name": "_msgSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2394, "src": "5993:10:1", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_address_$", "typeString": "function () view returns (address)" } }, "id": 317, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5993:12:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "VariableDeclarationStatement", "src": "5977:28:1" }, { "expression": { "arguments": [ { "id": 320, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 315, "src": "6024:5:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 321, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 307, "src": "6031:7:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 327, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "arguments": [ { "id": 323, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 315, "src": "6050:5:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 324, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 307, "src": "6057:7:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" } ], "id": 322, "name": "allowance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 246, "src": "6040:9:1", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_address_$_t_address_$returns$_t_uint256_$", "typeString": "function (address,address) view returns (uint256)" } }, "id": 325, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6040:25:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "+", "rightExpression": { "id": 326, "name": "addedValue", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 309, "src": "6068:10:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "6040:38:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 319, "name": "_approve", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 624, "src": "6015:8:1", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 328, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6015:64:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 329, "nodeType": "ExpressionStatement", "src": "6015:64:1" }, { "expression": { "hexValue": "74727565", "id": 330, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "6096:4:1", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "functionReturnParameters": 313, "id": 331, "nodeType": "Return", "src": "6089:11:1" } ] }, "documentation": { "id": 305, "nodeType": "StructuredDocumentation", "src": "5484:384:1", "text": " @dev Atomically increases the allowance granted to `spender` by the caller.\n This is an alternative to {approve} that can be used as a mitigation for\n problems described in {IERC20-approve}.\n Emits an {Approval} event indicating the updated allowance.\n Requirements:\n - `spender` cannot be the zero address." }, "functionSelector": "39509351", "id": 333, "implemented": true, "kind": "function", "modifiers": [], "name": "increaseAllowance", "nameLocation": "5882:17:1", "nodeType": "FunctionDefinition", "parameters": { "id": 310, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 307, "mutability": "mutable", "name": "spender", "nameLocation": "5908:7:1", "nodeType": "VariableDeclaration", "scope": 333, "src": "5900:15:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 306, 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"stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 311, "name": "bool", "nodeType": "ElementaryTypeName", "src": "5961:4:1", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "visibility": "internal" } ], "src": "5960:6:1" }, "scope": 690, "src": "5873:234:1", "stateMutability": "nonpayable", "virtual": true, "visibility": "public" }, { "body": { "id": 373, "nodeType": "Block", "src": "6693:328:1", "statements": [ { "assignments": [ 344 ], "declarations": [ { "constant": false, "id": 344, "mutability": "mutable", "name": "owner", "nameLocation": "6711:5:1", "nodeType": "VariableDeclaration", "scope": 373, "src": "6703:13:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 343, "name": "address", "nodeType": "ElementaryTypeName", "src": "6703:7:1", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" } ], "id": 347, "initialValue": { "arguments": [], "expression": { "argumentTypes": [], "id": 345, "name": "_msgSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2394, "src": "6719:10:1", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_address_$", "typeString": "function () view returns (address)" } }, "id": 346, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6719:12:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "VariableDeclarationStatement", "src": "6703:28:1" }, { "assignments": [ 349 ], "declarations": [ { "constant": false, "id": 349, "mutability": "mutable", "name": "currentAllowance", "nameLocation": "6749:16:1", "nodeType": "VariableDeclaration", "scope": 373, "src": "6741:24:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 348, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "6741:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "id": 354, "initialValue": { "arguments": [ { "id": 351, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 344, "src": "6778:5:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 352, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 336, "src": "6785:7:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" } ], "id": 350, "name": "allowance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 246, "src": "6768:9:1", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_address_$_t_address_$returns$_t_uint256_$", "typeString": "function (address,address) view returns (uint256)" } }, "id": 353, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6768:25:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "VariableDeclarationStatement", "src": "6741:52:1" }, { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 358, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 356, "name": "currentAllowance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 349, "src": "6811:16:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": ">=", "rightExpression": { "id": 357, "name": "subtractedValue", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 338, "src": "6831:15:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "6811:35:1", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a2064656372656173656420616c6c6f77616e63652062656c6f77207a65726f", "id": 359, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "6848:39:1", "typeDescriptions": { "typeIdentifier": "t_stringliteral_f8b476f7d28209d77d4a4ac1fe36b9f8259aa1bb6bddfa6e89de7e51615cf8a8", "typeString": "literal_string \"ERC20: decreased allowance below zero\"" }, "value": "ERC20: decreased allowance below zero" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_f8b476f7d28209d77d4a4ac1fe36b9f8259aa1bb6bddfa6e89de7e51615cf8a8", "typeString": "literal_string \"ERC20: decreased allowance below zero\"" } ], "id": 355, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ -18, -18 ], "referencedDeclaration": -18, "src": "6803:7:1", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 360, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6803:85:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 361, "nodeType": "ExpressionStatement", "src": "6803:85:1" }, { "id": 370, "nodeType": "UncheckedBlock", "src": "6898:95:1", "statements": [ { "expression": { "arguments": [ { "id": 363, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 344, "src": "6931:5:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 364, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 336, "src": "6938:7:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 367, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 365, "name": "currentAllowance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 349, "src": "6947:16:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "-", "rightExpression": { "id": 366, "name": "subtractedValue", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 338, "src": "6966:15:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "6947:34:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 362, "name": "_approve", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 624, "src": "6922:8:1", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 368, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6922:60:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 369, "nodeType": "ExpressionStatement", "src": "6922:60:1" } ] }, { "expression": { "hexValue": "74727565", "id": 371, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "7010:4:1", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "functionReturnParameters": 342, "id": 372, "nodeType": "Return", "src": "7003:11:1" } ] }, "documentation": { "id": 334, "nodeType": "StructuredDocumentation", "src": "6113:476:1", "text": " @dev Atomically decreases the allowance granted to `spender` by the caller.\n This is an alternative to {approve} that can be used as a mitigation for\n problems described in {IERC20-approve}.\n Emits an {Approval} event indicating the updated allowance.\n Requirements:\n - `spender` cannot be the zero address.\n - `spender` must have allowance for the caller of at least\n `subtractedValue`." }, "functionSelector": "a457c2d7", "id": 374, "implemented": true, "kind": "function", "modifiers": [], "name": "decreaseAllowance", "nameLocation": "6603:17:1", "nodeType": "FunctionDefinition", "parameters": { "id": 339, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 336, "mutability": "mutable", "name": "spender", "nameLocation": "6629:7:1", "nodeType": "VariableDeclaration", "scope": 374, "src": "6621:15:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 335, "name": "address", "nodeType": "ElementaryTypeName", "src": "6621:7:1", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { 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}, { "hexValue": "45524332303a207472616e736665722066726f6d20746865207a65726f2061646472657373", "id": 391, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "7630:39:1", "typeDescriptions": { "typeIdentifier": "t_stringliteral_baecc556b46f4ed0f2b4cb599d60785ac8563dd2dc0a5bf12edea1c39e5e1fea", "typeString": "literal_string \"ERC20: transfer from the zero address\"" }, "value": "ERC20: transfer from the zero address" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_baecc556b46f4ed0f2b4cb599d60785ac8563dd2dc0a5bf12edea1c39e5e1fea", "typeString": "literal_string \"ERC20: transfer from the zero address\"" } ], "id": 384, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ -18, -18 ], "referencedDeclaration": -18, "src": "7602:7:1", "typeDescriptions": { "typeIdentifier": 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"typeIdentifier": "t_address", "typeString": "address" } }, "src": "7688:16:1", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a207472616e7366657220746f20746865207a65726f2061646472657373", "id": 401, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "7706:37:1", "typeDescriptions": { "typeIdentifier": "t_stringliteral_0557e210f7a69a685100a7e4e3d0a7024c546085cee28910fd17d0b081d9516f", "typeString": "literal_string \"ERC20: transfer to the zero address\"" }, "value": "ERC20: transfer to the zero address" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_0557e210f7a69a685100a7e4e3d0a7024c546085cee28910fd17d0b081d9516f", "typeString": "literal_string \"ERC20: transfer to the zero address\"" } ], "id": 394, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 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"isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "id": 423, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 120, "src": "7957:9:1", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 425, "indexExpression": { "id": 424, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 377, "src": "7967:4:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "7957:15:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 428, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 426, "name": "fromBalance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 411, "src": "7975:11:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "-", "rightExpression": { "id": 427, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 381, "src": "7989:6:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "7975:20:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "7957:38:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 430, "nodeType": "ExpressionStatement", "src": "7957:38:1" } ] }, { "expression": { "id": 436, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "id": 432, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 120, "src": "8015:9:1", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 434, "indexExpression": { "id": 433, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 379, "src": "8025:2:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "8015:13:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "+=", "rightHandSide": { "id": 435, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 381, "src": "8032:6:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": 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{ "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 438, "name": "Transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 702, "src": "8054:8:1", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 442, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8054:26:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 443, "nodeType": "EmitStatement", "src": "8049:31:1" }, { "expression": { "arguments": [ { "id": 445, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 377, "src": "8111:4:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 446, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 379, "src": "8117:2:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 447, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 381, "src": "8121:6:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 444, "name": "_afterTokenTransfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 689, "src": "8091:19:1", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 448, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8091:37:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 449, "nodeType": "ExpressionStatement", "src": "8091:37:1" } ] }, "documentation": { "id": 375, "nodeType": "StructuredDocumentation", "src": "7027:452:1", "text": " @dev Moves `amount` of tokens from `sender` to `recipient`.\n This internal function is equivalent to {transfer}, and can be used to\n e.g. implement automatic token fees, slashing mechanisms, etc.\n Emits a {Transfer} event.\n Requirements:\n - `from` cannot be the zero address.\n - `to` cannot be the zero address.\n - `from` must have a balance of at least `amount`." }, "id": 451, "implemented": true, "kind": "function", "modifiers": [], "name": "_transfer", "nameLocation": "7493:9:1", "nodeType": "FunctionDefinition", "parameters": { "id": 382, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 377, "mutability": "mutable", "name": "from", "nameLocation": "7520:4:1", "nodeType": "VariableDeclaration", "scope": 451, "src": "7512:12:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 376, "name": "address", "nodeType": "ElementaryTypeName", "src": "7512:7:1", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 379, "mutability": "mutable", "name": "to", "nameLocation": "7542:2:1", "nodeType": "VariableDeclaration", "scope": 451, "src": "7534:10:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 378, "name": "address", "nodeType": "ElementaryTypeName", "src": "7534:7:1", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 381, "mutability": "mutable", "name": "amount", "nameLocation": "7562:6:1", "nodeType": "VariableDeclaration", "scope": 451, "src": "7554:14:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 380, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "7554:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "7502:72:1" }, "returnParameters": { "id": 383, "nodeType": "ParameterList", "parameters": [], "src": "7592:0:1" }, "scope": 690, "src": "7484:651:1", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 506, "nodeType": "Block", "src": "8476:324:1", "statements": [ { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 465, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 460, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 454, "src": "8494:7:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "arguments": [ { "hexValue": "30", "id": 463, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "8513:1:1", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 462, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "8505:7:1", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 461, "name": "address", "nodeType": "ElementaryTypeName", "src": "8505:7:1", "typeDescriptions": {} } }, "id": 464, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8505:10:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "8494:21:1", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a206d696e7420746f20746865207a65726f2061646472657373", "id": 466, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "8517:33:1", "typeDescriptions": { "typeIdentifier": "t_stringliteral_fc0b381caf0a47702017f3c4b358ebe3d3aff6c60ce819a8bf3ef5a95d4f202e", "typeString": "literal_string \"ERC20: mint to the zero address\"" }, "value": "ERC20: mint to the zero address" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_fc0b381caf0a47702017f3c4b358ebe3d3aff6c60ce819a8bf3ef5a95d4f202e", "typeString": "literal_string \"ERC20: mint to the zero address\"" } ], "id": 459, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ -18, -18 ], "referencedDeclaration": -18, "src": "8486:7:1", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 467, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8486:65:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 468, "nodeType": "ExpressionStatement", "src": 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"8583:10:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 474, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 454, "src": "8595:7:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 475, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 456, "src": "8604:6:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 469, "name": "_beforeTokenTransfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 678, "src": "8562:20:1", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 476, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8562:49:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 477, "nodeType": "ExpressionStatement", "src": "8562:49:1" }, { "expression": { "id": 480, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "id": 478, "name": "_totalSupply", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 128, "src": "8622:12:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "+=", "rightHandSide": { "id": 479, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 456, "src": "8638:6:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "8622:22:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 481, "nodeType": "ExpressionStatement", "src": "8622:22:1" }, { "expression": { "id": 486, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "id": 482, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 120, "src": "8654:9:1", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 484, "indexExpression": { "id": 483, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 454, "src": "8664:7:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "8654:18:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "+=", "rightHandSide": { "id": 485, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 456, "src": "8676:6:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "8654:28:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 487, "nodeType": "ExpressionStatement", "src": "8654:28:1" }, { "eventCall": { "arguments": [ { "arguments": [ { "hexValue": "30", "id": 491, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "8714:1:1", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 490, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "8706:7:1", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 489, "name": "address", "nodeType": "ElementaryTypeName", "src": "8706:7:1", "typeDescriptions": {} } }, "id": 492, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8706:10:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 493, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 454, "src": "8718:7:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 494, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 456, "src": "8727:6:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 488, "name": "Transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 702, "src": "8697:8:1", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 495, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8697:37:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 496, "nodeType": "EmitStatement", "src": "8692:42:1" }, { "expression": { "arguments": [ { "arguments": [ { "hexValue": "30", "id": 500, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "8773:1:1", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 499, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "8765:7:1", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 498, "name": "address", "nodeType": "ElementaryTypeName", "src": "8765:7:1", "typeDescriptions": {} } }, "id": 501, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8765:10:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 502, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 454, "src": "8777:7:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 503, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 456, "src": "8786:6:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 497, "name": "_afterTokenTransfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 689, "src": "8745:19:1", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 504, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8745:48:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 505, "nodeType": "ExpressionStatement", "src": "8745:48:1" } ] }, "documentation": { "id": 452, "nodeType": "StructuredDocumentation", "src": "8141:265:1", "text": "@dev Creates `amount` tokens and assigns them to `account`, increasing\n the total supply.\n Emits a {Transfer} event with `from` set to the zero address.\n Requirements:\n - `account` cannot be the zero address." }, "id": 507, "implemented": true, "kind": "function", "modifiers": [], "name": "_mint", "nameLocation": "8420:5:1", "nodeType": "FunctionDefinition", "parameters": { "id": 457, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 454, "mutability": "mutable", "name": "account", "nameLocation": "8434:7:1", "nodeType": "VariableDeclaration", "scope": 507, "src": "8426:15:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 453, "name": "address", "nodeType": "ElementaryTypeName", "src": "8426:7:1", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 456, "mutability": "mutable", "name": "amount", "nameLocation": "8451:6:1", "nodeType": "VariableDeclaration", "scope": 507, "src": "8443:14:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 455, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "8443:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "8425:33:1" }, "returnParameters": { "id": 458, "nodeType": "ParameterList", "parameters": [], "src": "8476:0:1" }, "scope": 690, "src": "8411:389:1", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 578, "nodeType": "Block", "src": "9185:511:1", "statements": [ { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 521, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 516, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 510, "src": "9203:7:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "arguments": [ { "hexValue": "30", "id": 519, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9222:1:1", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 518, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "9214:7:1", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 517, "name": "address", "nodeType": "ElementaryTypeName", "src": "9214:7:1", "typeDescriptions": {} } }, "id": 520, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9214:10:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "9203:21:1", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a206275726e2066726f6d20746865207a65726f2061646472657373", "id": 522, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "9226:35:1", "typeDescriptions": { "typeIdentifier": "t_stringliteral_b16788493b576042bb52c50ed56189e0b250db113c7bfb1c3897d25cf9632d7f", "typeString": "literal_string \"ERC20: burn from the zero address\"" }, "value": "ERC20: burn from the zero address" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_b16788493b576042bb52c50ed56189e0b250db113c7bfb1c3897d25cf9632d7f", "typeString": "literal_string \"ERC20: burn from the zero address\"" } ], "id": 515, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ -18, -18 ], "referencedDeclaration": -18, "src": "9195:7:1", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 523, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9195:67:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 524, "nodeType": "ExpressionStatement", "src": "9195:67:1" }, { "expression": { "arguments": [ { "id": 526, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 510, "src": "9294:7:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "arguments": [ { "hexValue": "30", "id": 529, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9311:1:1", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 528, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "9303:7:1", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 527, "name": "address", "nodeType": "ElementaryTypeName", "src": "9303:7:1", "typeDescriptions": {} } }, "id": 530, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9303:10:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 531, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 512, "src": "9315:6:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 525, "name": "_beforeTokenTransfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 678, "src": "9273:20:1", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 532, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9273:49:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 533, "nodeType": "ExpressionStatement", "src": "9273:49:1" }, { "assignments": [ 535 ], "declarations": [ { "constant": false, "id": 535, "mutability": "mutable", "name": "accountBalance", "nameLocation": "9341:14:1", "nodeType": "VariableDeclaration", "scope": 578, "src": "9333:22:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 534, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "9333:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "id": 539, "initialValue": { "baseExpression": { "id": 536, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 120, "src": "9358:9:1", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 538, "indexExpression": { "id": 537, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 510, "src": "9368:7:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "9358:18:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "VariableDeclarationStatement", "src": "9333:43:1" }, { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 543, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 541, "name": "accountBalance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 535, "src": "9394:14:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": ">=", "rightExpression": { "id": 542, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 512, "src": "9412:6:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "9394:24:1", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a206275726e20616d6f756e7420657863656564732062616c616e6365", "id": 544, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "9420:36:1", "typeDescriptions": { "typeIdentifier": "t_stringliteral_149b126e7125232b4200af45303d04fba8b74653b1a295a6a561a528c33fefdd", "typeString": "literal_string \"ERC20: burn amount exceeds balance\"" }, "value": "ERC20: burn amount exceeds balance" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_149b126e7125232b4200af45303d04fba8b74653b1a295a6a561a528c33fefdd", "typeString": "literal_string \"ERC20: burn amount exceeds balance\"" } ], "id": 540, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ -18, -18 ], "referencedDeclaration": -18, "src": "9386:7:1", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 545, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9386:71:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 546, "nodeType": "ExpressionStatement", "src": "9386:71:1" }, { "id": 555, "nodeType": "UncheckedBlock", "src": "9467:79:1", "statements": [ { "expression": { "id": 553, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "id": 547, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 120, "src": "9491:9:1", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 549, "indexExpression": { "id": 548, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 510, "src": "9501:7:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "9491:18:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 552, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 550, "name": "accountBalance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 535, "src": "9512:14:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "-", "rightExpression": { "id": 551, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 512, "src": "9529:6:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "9512:23:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "9491:44:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 554, "nodeType": "ExpressionStatement", "src": "9491:44:1" } ] }, { "expression": { "id": 558, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "id": 556, "name": "_totalSupply", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 128, "src": "9555:12:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "-=", "rightHandSide": { "id": 557, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 512, "src": "9571:6:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "9555:22:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 559, "nodeType": "ExpressionStatement", "src": "9555:22:1" }, { "eventCall": { "arguments": [ { "id": 561, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 510, "src": "9602:7:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "arguments": [ { "hexValue": "30", "id": 564, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9619:1:1", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 563, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "9611:7:1", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 562, "name": "address", "nodeType": "ElementaryTypeName", "src": "9611:7:1", "typeDescriptions": {} } }, "id": 565, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9611:10:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 566, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 512, "src": "9623:6:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 560, "name": "Transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 702, "src": "9593:8:1", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 567, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9593:37:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 568, "nodeType": "EmitStatement", "src": "9588:42:1" }, { "expression": { "arguments": [ { "id": 570, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 510, "src": "9661:7:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "arguments": [ { "hexValue": "30", "id": 573, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9678:1:1", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 572, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "9670:7:1", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 571, "name": "address", "nodeType": "ElementaryTypeName", "src": "9670:7:1", "typeDescriptions": {} } }, "id": 574, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9670:10:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 575, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 512, "src": "9682:6:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 569, "name": "_afterTokenTransfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 689, "src": "9641:19:1", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 576, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9641:48:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 577, "nodeType": "ExpressionStatement", "src": "9641:48:1" } ] }, "documentation": { "id": 508, "nodeType": "StructuredDocumentation", "src": "8806:309:1", "text": " @dev Destroys `amount` tokens from `account`, reducing the\n total supply.\n Emits a {Transfer} event with `to` set to the zero address.\n Requirements:\n - `account` cannot be the zero address.\n - `account` must have at least `amount` tokens." }, "id": 579, "implemented": true, "kind": "function", "modifiers": [], "name": "_burn", "nameLocation": "9129:5:1", "nodeType": "FunctionDefinition", "parameters": { "id": 513, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 510, "mutability": "mutable", "name": "account", "nameLocation": "9143:7:1", "nodeType": "VariableDeclaration", "scope": 579, "src": "9135:15:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 509, "name": "address", "nodeType": "ElementaryTypeName", "src": "9135:7:1", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 512, "mutability": "mutable", "name": "amount", "nameLocation": "9160:6:1", "nodeType": "VariableDeclaration", "scope": 579, "src": "9152:14:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 511, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "9152:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "9134:33:1" }, "returnParameters": { "id": 514, "nodeType": "ParameterList", "parameters": [], "src": "9185:0:1" }, "scope": 690, "src": "9120:576:1", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 623, "nodeType": "Block", "src": "10232:257:1", "statements": [ { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 595, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 590, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 582, "src": "10250:5:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "arguments": [ { "hexValue": "30", "id": 593, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "10267:1:1", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 592, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "10259:7:1", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 591, "name": "address", "nodeType": "ElementaryTypeName", "src": "10259:7:1", "typeDescriptions": {} } }, "id": 594, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10259:10:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "10250:19:1", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a20617070726f76652066726f6d20746865207a65726f2061646472657373", "id": 596, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "10271:38:1", "typeDescriptions": { "typeIdentifier": "t_stringliteral_c953f4879035ed60e766b34720f656aab5c697b141d924c283124ecedb91c208", "typeString": "literal_string \"ERC20: approve from the zero address\"" }, "value": "ERC20: approve from the zero address" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_c953f4879035ed60e766b34720f656aab5c697b141d924c283124ecedb91c208", "typeString": "literal_string \"ERC20: approve from the zero address\"" } ], "id": 589, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ -18, -18 ], "referencedDeclaration": -18, "src": "10242:7:1", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 597, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10242:68:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 598, "nodeType": "ExpressionStatement", "src": "10242:68:1" }, { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 605, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 600, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 584, "src": "10328:7:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "arguments": [ { "hexValue": "30", "id": 603, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "10347:1:1", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 602, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "10339:7:1", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 601, "name": "address", "nodeType": "ElementaryTypeName", "src": "10339:7:1", "typeDescriptions": {} } }, "id": 604, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10339:10:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "10328:21:1", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a20617070726f766520746f20746865207a65726f2061646472657373", "id": 606, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "10351:36:1", "typeDescriptions": { "typeIdentifier": "t_stringliteral_24883cc5fe64ace9d0df1893501ecb93c77180f0ff69cca79affb3c316dc8029", "typeString": "literal_string \"ERC20: approve to the zero address\"" }, "value": "ERC20: approve to the zero address" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_24883cc5fe64ace9d0df1893501ecb93c77180f0ff69cca79affb3c316dc8029", "typeString": "literal_string \"ERC20: approve to the zero address\"" } ], "id": 599, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ -18, -18 ], "referencedDeclaration": -18, "src": "10320:7:1", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 607, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10320:68:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 608, "nodeType": "ExpressionStatement", "src": "10320:68:1" }, { "expression": { "id": 615, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "baseExpression": { "baseExpression": { "id": 609, "name": "_allowances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 126, "src": "10399:11:1", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$", "typeString": "mapping(address => mapping(address => uint256))" } }, "id": 612, "indexExpression": { "id": 610, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 582, "src": "10411:5:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "10399:18:1", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 613, "indexExpression": { "id": 611, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 584, "src": "10418:7:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "10399:27:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "id": 614, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 586, "src": "10429:6:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "10399:36:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 616, "nodeType": "ExpressionStatement", "src": "10399:36:1" }, { "eventCall": { "arguments": [ { "id": 618, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 582, "src": "10459:5:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 619, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 584, "src": "10466:7:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 620, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 586, "src": "10475:6:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 617, "name": "Approval", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 711, "src": "10450:8:1", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 621, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10450:32:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 622, "nodeType": "EmitStatement", "src": "10445:37:1" } ] }, "documentation": { "id": 580, "nodeType": "StructuredDocumentation", "src": "9702:412:1", "text": " @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.\n This internal function is equivalent to `approve`, and can be used to\n e.g. set automatic allowances for certain subsystems, etc.\n Emits an {Approval} event.\n Requirements:\n - `owner` cannot be the zero address.\n - `spender` cannot be the zero address." }, "id": 624, "implemented": true, "kind": "function", "modifiers": [], "name": "_approve", "nameLocation": "10128:8:1", "nodeType": "FunctionDefinition", "parameters": { "id": 587, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 582, "mutability": "mutable", "name": "owner", "nameLocation": "10154:5:1", "nodeType": "VariableDeclaration", "scope": 624, "src": "10146:13:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 581, "name": "address", "nodeType": "ElementaryTypeName", "src": "10146:7:1", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 584, "mutability": "mutable", "name": "spender", "nameLocation": "10177:7:1", "nodeType": "VariableDeclaration", "scope": 624, "src": "10169:15:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 583, "name": "address", "nodeType": "ElementaryTypeName", "src": "10169:7:1", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 586, "mutability": "mutable", "name": "amount", "nameLocation": "10202:6:1", "nodeType": "VariableDeclaration", "scope": 624, "src": "10194:14:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 585, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "10194:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "10136:78:1" }, "returnParameters": { "id": 588, "nodeType": "ParameterList", "parameters": [], "src": "10232:0:1" }, "scope": 690, "src": "10119:370:1", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 666, "nodeType": "Block", "src": "10890:321:1", "statements": [ { "assignments": [ 635 ], "declarations": [ { "constant": false, "id": 635, "mutability": "mutable", "name": "currentAllowance", "nameLocation": "10908:16:1", "nodeType": "VariableDeclaration", "scope": 666, "src": "10900:24:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 634, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "10900:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "id": 640, "initialValue": { "arguments": [ { "id": 637, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 627, "src": "10937:5:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 638, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 629, "src": "10944:7:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" } ], "id": 636, "name": "allowance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 246, "src": "10927:9:1", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_address_$_t_address_$returns$_t_uint256_$", "typeString": "function (address,address) view returns (uint256)" } }, "id": 639, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10927:25:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "VariableDeclarationStatement", "src": "10900:52:1" }, { "condition": { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 647, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 641, "name": "currentAllowance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 635, "src": "10966:16:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "expression": { "arguments": [ { "id": 644, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "10991:7:1", "typeDescriptions": { "typeIdentifier": "t_type$_t_uint256_$", "typeString": "type(uint256)" }, "typeName": { "id": 643, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "10991:7:1", "typeDescriptions": {} } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_type$_t_uint256_$", "typeString": "type(uint256)" } ], "id": 642, "name": "type", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": -27, "src": "10986:4:1", "typeDescriptions": { "typeIdentifier": "t_function_metatype_pure$__$returns$__$", "typeString": "function () pure" } }, "id": 645, "isConstant": false, "isLValue": false, "isPure": true, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "10986:13:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_magic_meta_type_t_uint256", "typeString": "type(uint256)" } }, "id": 646, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "memberName": "max", "nodeType": "MemberAccess", "src": "10986:17:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "10966:37:1", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "id": 665, "nodeType": "IfStatement", "src": "10962:243:1", "trueBody": { "id": 664, "nodeType": "Block", "src": "11005:200:1", "statements": [ { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 651, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 649, "name": "currentAllowance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 635, "src": "11027:16:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": ">=", "rightExpression": { "id": 650, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 631, "src": "11047:6:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "11027:26:1", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "hexValue": "45524332303a20696e73756666696369656e7420616c6c6f77616e6365", "id": 652, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "11055:31:1", "typeDescriptions": { "typeIdentifier": "t_stringliteral_3b6607e091cba9325f958656d2b5e0622ab7dc0eac71a26ac788cb25bc19f4fe", "typeString": "literal_string \"ERC20: insufficient allowance\"" }, "value": "ERC20: insufficient allowance" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_3b6607e091cba9325f958656d2b5e0622ab7dc0eac71a26ac788cb25bc19f4fe", "typeString": "literal_string \"ERC20: insufficient allowance\"" } ], "id": 648, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ -18, -18 ], "referencedDeclaration": -18, "src": "11019:7:1", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 653, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "11019:68:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 654, "nodeType": "ExpressionStatement", "src": "11019:68:1" }, { "id": 663, "nodeType": "UncheckedBlock", "src": "11101:94:1", "statements": [ { "expression": { "arguments": [ { "id": 656, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 627, "src": "11138:5:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "id": 657, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 629, "src": "11145:7:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 660, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 658, "name": "currentAllowance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 635, "src": "11154:16:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "-", "rightExpression": { "id": 659, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 631, "src": "11173:6:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "11154:25:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 655, "name": "_approve", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 624, "src": "11129:8:1", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 661, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "11129:51:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 662, "nodeType": "ExpressionStatement", "src": "11129:51:1" } ] } ] } } ] }, "documentation": { "id": 625, "nodeType": "StructuredDocumentation", "src": "10495:270:1", "text": " @dev Updates `owner` s allowance for `spender` based on spent `amount`.\n Does not update the allowance amount in case of infinite allowance.\n Revert if not enough allowance is available.\n Might emit an {Approval} event." }, "id": 667, "implemented": true, "kind": "function", "modifiers": [], "name": "_spendAllowance", "nameLocation": "10779:15:1", "nodeType": "FunctionDefinition", "parameters": { "id": 632, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 627, "mutability": "mutable", "name": "owner", "nameLocation": "10812:5:1", "nodeType": "VariableDeclaration", "scope": 667, "src": "10804:13:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 626, "name": "address", "nodeType": "ElementaryTypeName", "src": "10804:7:1", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 629, "mutability": "mutable", "name": "spender", "nameLocation": "10835:7:1", "nodeType": "VariableDeclaration", "scope": 667, "src": "10827:15:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 628, "name": "address", "nodeType": "ElementaryTypeName", "src": "10827:7:1", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 631, "mutability": "mutable", "name": "amount", "nameLocation": "10860:6:1", "nodeType": "VariableDeclaration", "scope": 667, "src": "10852:14:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 630, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "10852:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "10794:78:1" }, "returnParameters": { "id": 633, "nodeType": "ParameterList", "parameters": [], "src": "10890:0:1" }, "scope": 690, "src": "10770:441:1", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 677, "nodeType": "Block", "src": "11914:2:1", "statements": [] }, "documentation": { "id": 668, "nodeType": "StructuredDocumentation", "src": "11217:573:1", "text": " @dev Hook that is called before any transfer of tokens. This includes\n minting and burning.\n Calling conditions:\n - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens\n will be transferred to `to`.\n - when `from` is zero, `amount` tokens will be minted for `to`.\n - when `to` is zero, `amount` of ``from``'s tokens will be burned.\n - `from` and `to` are never both zero.\n To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]." }, "id": 678, "implemented": true, "kind": "function", "modifiers": [], "name": "_beforeTokenTransfer", "nameLocation": "11804:20:1", "nodeType": "FunctionDefinition", "parameters": { "id": 675, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 670, "mutability": "mutable", "name": "from", "nameLocation": "11842:4:1", "nodeType": "VariableDeclaration", "scope": 678, "src": "11834:12:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 669, "name": "address", "nodeType": "ElementaryTypeName", "src": "11834:7:1", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 672, "mutability": "mutable", "name": "to", "nameLocation": "11864:2:1", "nodeType": "VariableDeclaration", "scope": 678, "src": "11856:10:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 671, "name": "address", "nodeType": "ElementaryTypeName", "src": "11856:7:1", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 674, "mutability": "mutable", "name": "amount", "nameLocation": "11884:6:1", "nodeType": "VariableDeclaration", "scope": 678, "src": "11876:14:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 673, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "11876:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "11824:72:1" }, "returnParameters": { "id": 676, "nodeType": "ParameterList", "parameters": [], "src": "11914:0:1" }, "scope": 690, "src": "11795:121:1", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 688, "nodeType": "Block", "src": "12622:2:1", "statements": [] }, "documentation": { "id": 679, "nodeType": "StructuredDocumentation", "src": "11922:577:1", "text": " @dev Hook that is called after any transfer of tokens. This includes\n minting and burning.\n Calling conditions:\n - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens\n has been transferred to `to`.\n - when `from` is zero, `amount` tokens have been minted for `to`.\n - when `to` is zero, `amount` of ``from``'s tokens have been burned.\n - `from` and `to` are never both zero.\n To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]." }, "id": 689, "implemented": true, "kind": "function", "modifiers": [], "name": "_afterTokenTransfer", "nameLocation": "12513:19:1", "nodeType": "FunctionDefinition", "parameters": { "id": 686, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 681, "mutability": "mutable", "name": "from", "nameLocation": "12550:4:1", "nodeType": "VariableDeclaration", "scope": 689, "src": "12542:12:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 680, "name": "address", "nodeType": "ElementaryTypeName", "src": "12542:7:1", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 683, "mutability": "mutable", "name": "to", "nameLocation": "12572:2:1", "nodeType": "VariableDeclaration", "scope": 689, "src": "12564:10:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 682, "name": "address", "nodeType": "ElementaryTypeName", "src": "12564:7:1", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 685, "mutability": "mutable", "name": "amount", "nameLocation": "12592:6:1", "nodeType": "VariableDeclaration", "scope": 689, "src": "12584:14:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 684, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "12584:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "12532:72:1" }, "returnParameters": { "id": 687, "nodeType": "ParameterList", "parameters": [], "src": "12622:0:1" }, "scope": 690, "src": "12504:120:1", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" } ], "scope": 691, "src": "1403:11223:1", "usedErrors": [] } ], "src": "105:12522:1" } }