pragma solidity ^0.5.0;


contract Proxy {
    
    constructor(bytes memory constructData, address contractLogic) public {
        
        assembly { 
            sstore(0xc5f16f0fcc639fa48a6947836d9850f504798523bf8c9a3a87d5876cf622bcf7, contractLogic)
        }
        
        (bool success,  ) = contractLogic.delegatecall(constructData); 
        require(success, "Construction failed");
    }

    function() external payable {
        assembly { 
            let contractLogic := sload(0xc5f16f0fcc639fa48a6947836d9850f504798523bf8c9a3a87d5876cf622bcf7)
            calldatacopy(0x0, 0x0, calldatasize)
            let success := delegatecall(sub(gas, 10000), contractLogic, 0x0, calldatasize, 0, 0)
            let retSz := returndatasize
            returndatacopy(0, 0, retSz)
            switch success
            case 0 {
                revert(0, retSz)
            }
            default {
                return(0, retSz)
            }
        }
    }
}