{ "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 ^0.4.23;\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": "openzeppelin-solidity/contracts/token/ERC20/BurnableToken.sol", "ast": { "absolutePath": "openzeppelin-solidity/contracts/token/ERC20/BurnableToken.sol", "exportedSymbols": { "BurnableToken": [ 4534 ] }, "id": 4535, "nodeType": "SourceUnit", "nodes": [ { "id": 4465, "literals": [ "solidity", "^", "0.4", ".23" ], "nodeType": "PragmaDirective", "src": "0:24:32" }, { "absolutePath": "openzeppelin-solidity/contracts/token/ERC20/BasicToken.sol", "file": "./BasicToken.sol", "id": 4466, "nodeType": "ImportDirective", "scope": 4535, "sourceUnit": 4464, "src": "26:26:32", "symbolAliases": [], "unitAlias": "" }, { "baseContracts": [ { "arguments": null, "baseName": { "contractScope": null, "id": 4467, "name": "BasicToken", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 4463, "src": "173:10:32", "typeDescriptions": { "typeIdentifier": "t_contract$_BasicToken_$4463", "typeString": "contract BasicToken" } }, "id": 4468, "nodeType": "InheritanceSpecifier", "src": "173:10:32" } ], "contractDependencies": [ 4463, 4609 ], "contractKind": "contract", "documentation": "@title Burnable Token\n@dev Token that can be irreversibly burned (destroyed).", "fullyImplemented": true, "id": 4534, "linearizedBaseContracts": [ 4534, 4463, 4609 ], "name": "BurnableToken", "nodeType": "ContractDefinition", "nodes": [ { "anonymous": false, "documentation": null, "id": 4474, "name": "Burn", "nodeType": "EventDefinition", "parameters": { "id": 4473, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 4470, "indexed": true, "name": "burner", "nodeType": "VariableDeclaration", "scope": 4474, "src": "200:22:32", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 4469, "name": "address", "nodeType": "ElementaryTypeName", "src": "200:7:32", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 4472, "indexed": false, "name": "value", "nodeType": "VariableDeclaration", "scope": 4474, "src": "224:13:32", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 4471, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "224:7:32", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "199:39:32" }, "src": "189:50:32" }, { "body": { "id": 4485, "nodeType": "Block", "src": "390:36:32", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "expression": { "argumentTypes": null, "id": 4480, "name": "msg", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 6109, "src": "402:3:32", "typeDescriptions": { "typeIdentifier": "t_magic_message", "typeString": "msg" } }, "id": 4481, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sender", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "402:10:32", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 4482, "name": "_value", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4476, "src": "414:6:32", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 4479, "name": "_burn", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4533, "src": "396:5:32", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,uint256)" } }, "id": 4483, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "396:25:32", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 4484, "nodeType": "ExpressionStatement", "src": "396:25:32" } ] }, "documentation": "@dev Burns a specific amount of tokens.\n@param _value The amount of token to be burned.", "id": 4486, "implemented": true, "isConstructor": false, "isDeclaredConst": false, "modifiers": [], "name": "burn", "nodeType": "FunctionDefinition", "parameters": { "id": 4477, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 4476, "name": "_value", "nodeType": "VariableDeclaration", "scope": 4486, "src": "367:14:32", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 4475, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "367:7:32", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "366:16:32" }, "payable": false, "returnParameters": { "id": 4478, "nodeType": "ParameterList", "parameters": [], "src": "390:0:32" }, "scope": 4534, "src": "353:73:32", "stateMutability": "nonpayable", "superFunction": null, "visibility": "public" }, { "body": { "id": 4532, "nodeType": "Block", "src": "484:384:32", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 4498, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 4494, "name": "_value", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4490, "src": "498:6:32", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "<=", "rightExpression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 4495, "name": "balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4380, "src": "508:8:32", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 4497, "indexExpression": { "argumentTypes": null, "id": 4496, "name": "_who", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4488, "src": "517:4:32", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "508:14:32", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "498:24:32", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" } ], "id": 4493, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 6112, 6113 ], "referencedDeclaration": 6112, "src": "490:7:32", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$returns$__$", "typeString": "function (bool) pure" } }, "id": 4499, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "490:33:32", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 4500, "nodeType": "ExpressionStatement", "src": "490:33:32" }, { "expression": { "argumentTypes": null, "id": 4510, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 4501, "name": "balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4380, "src": "701:8:32", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 4503, "indexExpression": { "argumentTypes": null, "id": 4502, "name": "_who", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4488, "src": "710:4:32", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "701:14:32", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 4508, "name": "_value", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4490, "src": "737:6:32", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 4504, "name": "balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4380, "src": "718:8:32", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 4506, "indexExpression": { "argumentTypes": null, "id": 4505, "name": "_who", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4488, "src": "727:4:32", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "718:14:32", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 4507, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sub", "nodeType": "MemberAccess", "referencedDeclaration": 4256, "src": "718:18:32", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_uint256_$_t_uint256_$returns$_t_uint256_$bound_to$_t_uint256_$", "typeString": "function (uint256,uint256) pure returns (uint256)" } }, "id": 4509, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "718:26:32", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "701:43:32", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 4511, "nodeType": "ExpressionStatement", "src": "701:43:32" }, { "expression": { "argumentTypes": null, "id": 4517, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "id": 4512, "name": "totalSupply_", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4382, "src": "750:12:32", "typeDescriptions": { 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