Refer to this article
as far as i know verifying directly from the scan sometimes have a slight problem, but when you do it from hardhat/truffle it's working, or use Etherscan API with Remix.
Refer to this article
as far as i know verifying directly from the scan sometimes have a slight problem, but when you do it from hardhat/truffle it's working, or use Etherscan API with Remix.