Cannot verify a contract with construct args and created within another contract

[zkbenny]

I create a verify example project follow the guide Verify Contracts with Hardhat. Deploy and verify of the Greeter contract are ok, but verify a contract with construct args and created within another contract failed with message:

Error in plugin @matterlabs/hardhat-zksync-verify: Constructor arguments are not correct

Here are two contracts: DeployFactory and Proxy, when deploy a DeployFactory, a Proxy with a default input 100 will be created within.

// SPDX-License-Identifier: MIT OR Apache-2.0

pragma solidity ^0.8.0;

import "./Proxy.sol";

contract DeployFactory {
    Proxy public proxy;

    constructor() {
        proxy = new Proxy(100);
    }
}

// SPDX-License-Identifier: MIT OR Apache-2.0

pragma solidity ^0.8.0;

contract Proxy {
    uint256 public count;

    constructor(uint256 _count) {
        count = _count;
    }
}

Here is the details of running deploy script to testnet:

yarn hardhat deploy-zksync --script deploy-proxy.ts

Running deploy script for the Proxy contract
The deployment is estimated to cost 0.000785932 ETH
Constructor args:0x
DeployFactory was deployed to 0x8c03eC86967347dEDB5f1614b0AB23e48F6a215D
Proxy was deployed to 0x22EA9D66eA20D0826444B9716Af4261Ce98b51Ba
Compiling contracts for zkSync Era with zksolc v1.3.13 and solc v0.8.17
Compiling 2 Solidity files
Your verification ID is: 34368
Contract successfully verified on zkSync block explorer!
Compiling contracts for zkSync Era with zksolc v1.3.13 and solc v0.8.17
Compiling 1 Solidity file
Your verification ID is: 34369
Error in plugin @matterlabs/hardhat-zksync-verify: Constructor arguments are not correct

For more info run Hardhat with --show-stack-traces
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

The DeployFactory contract 0x8c03eC86967347dEDB5f1614b0AB23e48F6a215D verify succeed, but the Proxy contract 0x22EA9D66eA20D0826444B9716Af4261Ce98b51Ba verify failed.

[zkbenny]

I'm sure the constructorArguments to verify Proxy contract is correct. I also tried verify command:

yarn hardhat verify --network zkSyncTestnet 0x22EA9D66eA20D0826444B9716Af4261Ce98b51Ba 100

Still not work.

Your verification ID is: 34388
Error in plugin @matterlabs/hardhat-zksync-verify: Constructor arguments are not correct

[zkbenny]

I also tried to verify in the explorer ui

but still not work

[zkbenny]

I tried looking for a solution from discord, and found a similar question

[FilipTxFusion]

Hi @zkbenny, this is a known bug where the verification of the smart contract deployed from another contract expects parent's constructor args.
I will leave the issue open until the problem is resolved, and we will let you know once the new release is ready.

[zkbenny]

@FilipTxFusion Thanks, could you please fix this issue as soon as possible, if the contract cannot be open source and we cannot gain the trust of users

[statskiy-sovetnik]

@FilipTxFusion bumping this issue as we are also trying to verify a BeaconProxy, deployed from within a different contract. Getting an out-of-bound error, because I think it tries to decode tx params as constructor arguments, but they are different.

[FilipTxFusion]

I understand, thanks for reporting it.
This task is added to our backlog and we will get to work on it as soon as other priorities are solved.

[novaknole]

Hi.. Is this issue resolved ? still getting the: Backend verification error: Constructor arguments are not correct when contract is deployed from another contract.

[zkcarter]

Hi @FilipTxFusion Does this problem solved? I see the official contract of zkSync L2StandardERC20 has been verified.
I want to know how can our developers verify our contracts like zkSync L2StandardERC20. Thank you and waiting for your reply.