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@bjoveski
Last active November 12, 2022 22:42
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contract ForwarderFactory {
function cloneForwarder(address forwarder, uint256 salt)
public returns (Forwarder clonedForwarder) {
address clonedAddress = createClone(forwarder, salt);
Forwarder parentForwarder = Forwarder(forwarder);
clonedForwarder = Forwarder(clonedAddress);
clonedForwarder.init(parentForwarder.destination());
}
function createClone(address target, uint256 salt) private returns (address result) {
bytes20 targetBytes = bytes20(target);
assembly {
let clone := mload(0x40)
mstore(clone, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000)
mstore(add(clone, 0x14), targetBytes)
mstore(add(clone, 0x28), 0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000)
result := create2(0, clone, 0x37, salt)
}
}
}
@Anietz
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Anietz commented Aug 19, 2021

Hello,

I am using the javascript code below to generate the off-chain code.

I observed that the off-chain address is not equal to the deployed contract address.
Can you help me understand what steps I am missing ?
Thank you.

function buildCreate2Address(senderAddress, saltHex, bytecode) { return web3.utils.toChecksumAddress(0x${web3.utils.sha3(0x${[ 'ff', senderAddress, saltHex, web3.utils.sha3(bytecode) ].map(x => x.replace(/0x/, '')) .join('')}).slice(-40)}); }

@Anietz
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Anietz commented Aug 26, 2021

solved this with the code below:

`// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8;

import "./ForwarderV3.sol";
import "@openzeppelin/contracts/proxy/Clones.sol";

contract Factory {

//event Deployed(address from, uint value);

event ForwarderCloned(address clonedAdress);

      function cloneForwarder(address payable forwarder, uint256 salt)
            public returns (Forwarder clonedForwarder) {
            address payable clonedAddress = createClone(forwarder, salt);
            Forwarder parentForwarder = Forwarder(forwarder);
            clonedForwarder = Forwarder(clonedAddress);
            clonedForwarder.init(parentForwarder.destinationAddress());
            emit ForwarderCloned(clonedAddress);
      }
      
      
      function createClone(address target, uint256 salt) private returns (address payable result) {
        bytes20 targetBytes = bytes20(target);
        assembly {
          let clone := mload(0x40)
          mstore(clone, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000)
          mstore(add(clone, 0x14), targetBytes)
          mstore(add(clone, 0x28), 0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000)
          result := create2(0, clone, 0x37, salt)
        }
      }
      
      function predictCloneAddress(address forwarderAddress_, uint256 salt_)
    public
    view
    returns (address)
        {
            address predictedAddress =
                Clones.predictDeterministicAddress(
                    forwarderAddress_,
                    bytes32(salt_)
                );
    
            return predictedAddress;
        }

}

`

@gitchand
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gitchand commented Apr 2, 2022

Is init function of Forwarder public used in cloneForwarder? Can you please share code of init function?

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