OptimisticEthereum UUPS proxy verification

Support Upgrades
1

Hello, I'm creating an UUPS contract on the Optimistic network using hardhat and the contract of proxy is not verified.
I can verify implementation but not the proxy contract itself.
Etherscan says:
" The proxy contract at 0x3E818Baf68F6465b2d97604f072CE6E402B906F7 does not seem to be verified."
The same is for the kovan-optimistic (testnet)

:1234: Code to reproduce

// Contract code
import "@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/proxy/utils/UUPSUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";

contract StrategyStorage is Initializable, UUPSUpgradeable, OwnableUpgradeable {
...
}

//deployment
const StrategyStorage = await hre.ethers.getContractFactory("StrategyStorage");
const strategy = await upgrades.deployProxy(StrategyStorage, [args],
    {
        initializer: "initialize",
        kind: "uups"
    });
await strategy.deployed();

:computer: Environment

"@nomiclabs/hardhat-ethers": "^2.0.3",
"@nomiclabs/hardhat-etherscan": "^2.1.8",
"@nomiclabs/hardhat-truffle5": "^2.0.2",
"@nomiclabs/hardhat-waffle": "^2.0.1",
"@nomiclabs/hardhat-web3": "^2.0.0",
"@openzeppelin/contracts": "^4.3.3",
"@openzeppelin/contracts-upgradeable": "^4.4.0",

2

BSC testnet is verifying proxy with the same code

3

If you use the latest version of the hardhat-upgrades plugin, you can try using the new verify task (which extends hardhat-etherscan's verify) to verify your proxy. See https://docs.openzeppelin.com/upgrades-plugins/1.x/api-hardhat-upgrades#verify

4

Hello, ericglau.

This task automatically founds the implementation and then says:
"Implementation 0xf6cF656b31b27Eef735714aDe2fD39DF5edbc9FF already verified."

And it really is. Implementation is verified but proxy is not.

5

It should have proceeded to verify the proxy after that message.

Can you enable debug with

export DEBUG=@openzeppelin:upgrades:*

and run the verify task again, then provide the console output here?

6

I found the root cause, i was using library @nomiclabs/hardhat-etherscan": "3.0.4" which seems to be bugged for now.

Once downgraded to 3.0.3 everything works. Thanks for quick responses!