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"source": "pragma solidity ^0.4.18;\n\n// Inspired by https://github.com/reverendus/tx-manager\n\nimport \"../ScriptHelpers.sol\";\nimport \"../IEVMScriptExecutor.sol\";\n\n\ncontract CallsScript is IEVMScriptExecutor {\n using ScriptHelpers for bytes;\n\n uint256 constant internal SCRIPT_START_LOCATION = 4;\n\n event LogScriptCall(address indexed sender, address indexed src, address indexed dst);\n\n /**\n * @notice Executes a number of call scripts\n * @param _script [ specId (uint32) ] many calls with this structure ->\n * [ to (address: 20 bytes) ] [ calldataLength (uint32: 4 bytes) ] [ calldata (calldataLength bytes) ]\n * @param _input Input is ignored in callscript\n * @param _blacklist Addresses the script cannot call to, or will revert.\n * @return always returns empty byte array\n */\n function execScript(bytes _script, bytes _input, address[] _blacklist) external returns (bytes) {\n uint256 location = SCRIPT_START_LOCATION; // first 32 bits are spec id\n while (location < _script.length) {\n address contractAddress = _script.addressAt(location);\n // Check address being called is not blacklist\n for (uint i = 0; i < _blacklist.length; i++) {\n require(contractAddress != _blacklist[i]);\n }\n\n // logged before execution to ensure event ordering in receipt\n // if failed entire execution is reverted regardless\n LogScriptCall(msg.sender, address(this), contractAddress);\n\n uint256 calldataLength = uint256(_script.uint32At(location + 0x14));\n uint256 calldataStart = _script.locationOf(location + 0x14 + 0x04);\n\n assembly {\n let success := call(sub(gas, 5000), contractAddress, 0, calldataStart, calldataLength, 0, 0)\n switch success case 0 { revert(0, 0) }\n }\n\n location += (0x14 + 0x04 + calldataLength);\n }\n }\n}", "sourcePath": "@aragon/os/contracts/evmscript/executors/CallsScript.sol", "ast": { "attributes": { "absolutePath": "@aragon/os/contracts/evmscript/executors/CallsScript.sol", "exportedSymbols": { "CallsScript": [ 8381 ] } }, "children": 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