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"source": "pragma solidity ^0.4.18;\n\nimport \"../apps/AppStorage.sol\";\nimport \"./IEVMScriptExecutor.sol\";\nimport \"./IEVMScriptRegistry.sol\";\n\nimport \"./ScriptHelpers.sol\";\n\n\ncontract EVMScriptRunner is AppStorage, EVMScriptRegistryConstants {\n using ScriptHelpers for bytes;\n\n function runScript(bytes _script, bytes _input, address[] _blacklist) protectState internal returns (bytes output) {\n // TODO: Too much data flying around, maybe extracting spec id here is cheaper\n address executorAddr = getExecutor(_script);\n require(executorAddr != address(0));\n\n bytes memory calldataArgs = _script.encode(_input, _blacklist);\n bytes4 sig = IEVMScriptExecutor(0).execScript.selector;\n\n require(executorAddr.delegatecall(sig, calldataArgs));\n\n return returnedDataDecoded();\n }\n\n function getExecutor(bytes _script) public view returns (IEVMScriptExecutor) {\n return IEVMScriptExecutor(getExecutorRegistry().getScriptExecutor(_script));\n }\n\n // TODO: Internal\n function getExecutorRegistry() internal view returns (IEVMScriptRegistry) {\n address registryAddr = kernel.getApp(EVMSCRIPT_REGISTRY_APP);\n return IEVMScriptRegistry(registryAddr);\n }\n\n /**\n * @dev copies and returns last's call data. Needs to ABI decode first\n */\n function returnedDataDecoded() internal view returns (bytes ret) {\n assembly {\n let size := returndatasize\n switch size\n case 0 {}\n default {\n ret := mload(0x40) // free mem ptr get\n mstore(0x40, add(ret, add(size, 0x20))) // free mem ptr set\n returndatacopy(ret, 0x20, sub(size, 0x20)) // copy return data\n }\n }\n return ret;\n }\n\n modifier protectState {\n address preKernel = kernel;\n bytes32 preAppId = appId;\n _; // exec\n require(kernel == preKernel);\n require(appId == preAppId);\n }\n}", "sourcePath": "@aragon/os/contracts/evmscript/EVMScriptRunner.sol", "ast": { "attributes": { "absolutePath": "@aragon/os/contracts/evmscript/EVMScriptRunner.sol", "exportedSymbols": { "EVMScriptRunner": [ 7846 ] } }, "children": [ { "attributes": { "literals": [ "solidity", "^", "0.4", ".18" ] }, "id": 7712, "name": "PragmaDirective", "src": "0:24:29" }, { "attributes": { "SourceUnit": 6871, "absolutePath": "@aragon/os/contracts/apps/AppStorage.sol", 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