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"source": "pragma solidity 0.4.24;\n\nimport \"../../interface/ApproveAndCallReceiver.sol\";\n\n\ncontract MockApproveAndCallERC20 {\n mapping(address => uint256) public balances;\n mapping(address => mapping (address => uint256)) internal allowed;\n\n // From https://github.com/aragon/aragon-network-token/blob/master/contracts/MiniMeToken.sol\n function approveAndCall(address _spender, uint256 _amount, bytes _extraData) public returns (bool success) {\n approve(_spender, _amount);\n\n // This portion is copied from ConsenSys's Standard Token Contract. It\n // calls the receiveApproval function that is part of the contract that\n // is being approved (`_spender`). The function should look like:\n // `receiveApproval(address _from, uint256 _amount, address\n // _tokenContract, bytes _extraData)` It is assumed that the call\n // *should* succeed, otherwise the plain vanilla approve would be used\n ApproveAndCallReceiver(_spender).receiveApproval(\n msg.sender,\n _amount,\n this,\n _extraData\n );\n return true;\n }\n\n function approve(address _spender, uint256 _value) public returns (bool) {\n allowed[msg.sender][_spender] = _value;\n return true;\n }\n\n function mintToken(address _to, uint256 _value) public {\n balances[_to] += _value;\n }\n\n function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {\n require(_value <= balances[_from]);\n require(_value <= allowed[_from][msg.sender]);\n\n balances[_from] -= _value;\n balances[_to] += _value;\n allowed[_from][msg.sender] -= _value;\n return true;\n }\n}\n", "sourcePath": "/Users/brett/Development/aragon/aragon-id/contracts/test/mocks/MockApproveAndCallERC20.sol", 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"ElementaryTypeName", "src": "207:7:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } } }, "value": null, "visibility": "internal" }, { "body": { "id": 3089, "nodeType": "Block", "src": "444:679:13", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 3072, "name": "_spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3062, "src": "462:8:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 3073, "name": "_amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3064, "src": "472:7:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 3071, "name": "approve", "nodeType": 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