{ "contractName": "BurnableToken", "abi": [ { "constant": true, "inputs": [], "name": "totalSupply", "outputs": [ { "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [ { "name": "_owner", "type": "address" } ], "name": "balanceOf", "outputs": [ { "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": false, "inputs": [ { "name": "_to", "type": "address" }, { "name": "_value", "type": "uint256" } ], "name": "transfer", "outputs": [ { "name": "", "type": "bool" } ], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "anonymous": false, "inputs": [ { "indexed": true, "name": "burner", "type": "address" }, { "indexed": false, "name": "value", "type": "uint256" } ], "name": "Burn", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": true, "name": "from", "type": "address" }, { "indexed": true, "name": "to", "type": "address" }, { "indexed": false, "name": "value", "type": "uint256" } ], "name": "Transfer", "type": "event" }, { "constant": false, "inputs": [ { "name": "_value", "type": "uint256" } ], "name": "burn", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" } ], "bytecode": 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"source": "pragma solidity ^0.4.24;\n\nimport \"./BasicToken.sol\";\n\n\n/**\n * @title Burnable Token\n * @dev Token that can be irreversibly burned (destroyed).\n */\ncontract BurnableToken is BasicToken {\n\n event Burn(address indexed burner, uint256 value);\n\n /**\n * @dev Burns a specific amount of tokens.\n * @param _value The amount of token to be burned.\n */\n function burn(uint256 _value) public {\n _burn(msg.sender, _value);\n }\n\n function _burn(address _who, uint256 _value) internal {\n require(_value <= balances[_who]);\n // no need to require value <= totalSupply, since that would imply the\n // sender's balance is greater than the totalSupply, which *should* be an assertion failure\n\n balances[_who] = balances[_who].sub(_value);\n totalSupply_ = totalSupply_.sub(_value);\n emit Burn(_who, _value);\n emit Transfer(_who, address(0), _value);\n }\n}\n", "sourcePath": "zeppelin-solidity/contracts/token/ERC20/BurnableToken.sol", "ast": { "absolutePath": "zeppelin-solidity/contracts/token/ERC20/BurnableToken.sol", "exportedSymbols": { "BurnableToken": [ 4289 ] }, "id": 4290, "nodeType": "SourceUnit", "nodes": [ { "id": 4220, "literals": [ "solidity", "^", "0.4", ".24" ], "nodeType": "PragmaDirective", "src": "0:24:23" }, { "absolutePath": "zeppelin-solidity/contracts/token/ERC20/BasicToken.sol", "file": "./BasicToken.sol", "id": 4221, "nodeType": "ImportDirective", "scope": 4290, "sourceUnit": 4219, "src": "26:26:23", "symbolAliases": [], "unitAlias": "" }, { "baseContracts": [ { "arguments": null, "baseName": { "contractScope": null, "id": 4222, "name": "BasicToken", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 4218, "src": "173:10:23", "typeDescriptions": { "typeIdentifier": "t_contract$_BasicToken_$4218", "typeString": "contract BasicToken" } }, "id": 4223, "nodeType": "InheritanceSpecifier", "src": "173:10:23" } ], "contractDependencies": [ 4218, 4398 ], "contractKind": "contract", "documentation": "@title Burnable Token\n@dev Token that can be irreversibly burned (destroyed).", "fullyImplemented": true, "id": 4289, "linearizedBaseContracts": [ 4289, 4218, 4398 ], "name": "BurnableToken", "nodeType": "ContractDefinition", "nodes": [ { "anonymous": false, "documentation": null, "id": 4229, "name": "Burn", "nodeType": "EventDefinition", "parameters": { "id": 4228, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 4225, "indexed": true, "name": "burner", "nodeType": "VariableDeclaration", "scope": 4229, "src": "200:22:23", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 4224, "name": "address", "nodeType": "ElementaryTypeName", "src": "200:7:23", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 4227, "indexed": false, "name": "value", "nodeType": "VariableDeclaration", "scope": 4229, "src": "224:13:23", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 4226, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "224:7:23", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "199:39:23" }, "src": "189:50:23" }, { "body": { "id": 4240, "nodeType": "Block", "src": "390:36:23", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "expression": { "argumentTypes": null, "id": 4235, "name": "msg", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4916, "src": "402:3:23", "typeDescriptions": { "typeIdentifier": "t_magic_message", "typeString": "msg" } }, "id": 4236, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sender", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "402:10:23", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 4237, "name": "_value", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4231, "src": "414:6:23", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 4234, "name": "_burn", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4288, "src": "396:5:23", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,uint256)" } }, "id": 4238, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "396:25:23", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 4239, "nodeType": "ExpressionStatement", "src": "396:25:23" } ] }, "documentation": "@dev Burns a specific amount of tokens.\n@param _value The amount of token to be burned.", "id": 4241, "implemented": true, "isConstructor": false, "isDeclaredConst": false, "modifiers": [], "name": "burn", "nodeType": "FunctionDefinition", "parameters": { "id": 4232, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 4231, "name": "_value", "nodeType": "VariableDeclaration", "scope": 4241, "src": "367:14:23", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 4230, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "367:7:23", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "366:16:23" }, "payable": false, "returnParameters": { "id": 4233, "nodeType": "ParameterList", "parameters": [], "src": "390:0:23" }, "scope": 4289, "src": "353:73:23", "stateMutability": "nonpayable", "superFunction": null, "visibility": "public" }, { "body": { "id": 4287, "nodeType": "Block", "src": "484:384:23", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 4253, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 4249, "name": "_value", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4245, "src": "498:6:23", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "<=", "rightExpression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 4250, "name": "balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4135, "src": "508:8:23", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 4252, "indexExpression": { "argumentTypes": null, "id": 4251, "name": "_who", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4243, "src": "517:4:23", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "508:14:23", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "498:24:23", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" } ], "id": 4248, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4919, 4920 ], "referencedDeclaration": 4919, "src": "490:7:23", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$returns$__$", "typeString": "function (bool) pure" } }, "id": 4254, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "490:33:23", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 4255, "nodeType": "ExpressionStatement", "src": "490:33:23" }, { "expression": { "argumentTypes": null, "id": 4265, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 4256, "name": "balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4135, "src": "701:8:23", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 4258, "indexExpression": { "argumentTypes": null, "id": 4257, "name": "_who", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4243, "src": "710:4:23", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "701:14:23", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 4263, "name": "_value", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4245, "src": "737:6:23", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 4259, "name": "balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4135, "src": "718:8:23", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 4261, "indexExpression": { "argumentTypes": null, "id": 4260, "name": "_who", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4243, "src": "727:4:23", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "718:14:23", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 4262, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sub", "nodeType": "MemberAccess", "referencedDeclaration": 4011, "src": "718:18:23", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_uint256_$_t_uint256_$returns$_t_uint256_$bound_to$_t_uint256_$", "typeString": "function (uint256,uint256) pure returns (uint256)" } }, "id": 4264, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "718:26:23", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "701:43:23", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 4266, "nodeType": "ExpressionStatement", "src": "701:43:23" }, { "expression": { "argumentTypes": null, "id": 4272, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "id": 4267, "name": "totalSupply_", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4137, "src": "750:12:23", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 4270, "name": "_value", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4245, "src": "782:6:23", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "argumentTypes": null, "id": 4268, "name": "totalSupply_", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4137, "src": "765:12:23", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 4269, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sub", "nodeType": "MemberAccess", "referencedDeclaration": 4011, "src": "765:16:23", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_uint256_$_t_uint256_$returns$_t_uint256_$bound_to$_t_uint256_$", "typeString": "function (uint256,uint256) pure returns (uint256)" } }, "id": 4271, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "765:24:23", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "750:39:23", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 4273, "nodeType": "ExpressionStatement", "src": "750:39:23" }, { "eventCall": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 4275, "name": "_who", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4243, "src": "805:4:23", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 4276, "name": "_value", "nodeType": "Identifier", "overloadedDeclarations": 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