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38 lines
1.0 KiB
Solidity
38 lines
1.0 KiB
Solidity
pragma solidity >=0.5.0 <0.6.0;
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/**
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* @title DelegatedCall
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* @author Ricardo Guilherme Schmidt (Status Research & Development GmbH)
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* @dev Encapsulates delegatecall related logic.
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*/
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contract DelegatedCall {
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constructor(address _init, bytes memory _initMsg) internal {
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if(_init == address(0)) return;
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bool success;
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(success, ) = _init.delegatecall(_initMsg);
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require(success, "Delegated Construct fail");
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}
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/**
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* @dev delegates the call of this function
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*/
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modifier delegateAndReturn(address _target) {
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if(_target == address(0)) {
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_; //normal execution
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} else {
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//delegated execution
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bytes memory returnData;
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bool success;
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(success, returnData) = _target.delegatecall(msg.data);
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require(success, "Delegated Call failed");
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//exit-return delegatecall returnData
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assembly {
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return(add(returnData, 0x20), returnData)
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}
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}
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}
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}
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