Contract Source Code:
File 1 of 1 : Proxy
// File: contracts/Proxy.sol
pragma solidity 0.6.12;
contract Proxy {
// Code position in storage is keccak256("PROXIABLE") = "0xc5f16f0fcc639fa48a6947836d9850f504798523bf8c9a3a87d5876cf622bcf7"
uint256 constant PROXIABLE_MEM_SLOT = 0xc5f16f0fcc639fa48a6947836d9850f504798523bf8c9a3a87d5876cf622bcf7;
// constructor(bytes memory constructData, address contractLogic) public {
constructor(address contractLogic) public {
// Verify a valid address was passed in
require(contractLogic != address(0), "Contract Logic cannot be 0x0");
// save the code address
assembly { // solium-disable-line
sstore(PROXIABLE_MEM_SLOT, contractLogic)
}
}
fallback() external payable {
assembly { // solium-disable-line
let contractLogic := sload(PROXIABLE_MEM_SLOT)
let ptr := mload(0x40)
calldatacopy(ptr, 0x0, calldatasize())
let success := delegatecall(gas(), contractLogic, ptr, calldatasize(), 0, 0)
let retSz := returndatasize()
returndatacopy(ptr, 0, retSz)
switch success
case 0 {
revert(ptr, retSz)
}
default {
return(ptr, retSz)
}
}
}
}
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