Opened up a new issue request
When using Solidity 0.8 in the contract and importing
import "@openzeppelin/contracts/proxy/utils/Initializable.sol"
The contracts do get compiled in Solidity v 0.8.
However, when attempting to verify the contracts using
npx hardhat verify --network <networkName> <address>
Getting the following error:
Error in plugin @nomiclabs/hardhat-etherscan: The bytecode retrieved could not have been generated by any of the selected compilers.
The expected version is 0.6.12.
The selected compiler version is: 0.8.0
Possible causes are:
- Wrong compiler version selected in hardhat config.
- The given address is wrong.
- The selected network (kovan) is wrong.
While digging through the fx upgrades.deployProxy it is importing:
import AdminUpgradeabilityProxy from '@openzeppelin/upgrades-core/artifacts/contracts/proxy/AdminUpgradeabilityProxy.sol/AdminUpgradeabilityProxy.json';
import ProxyAdmin from '@openzeppelin/upgrades-core/artifacts/contracts/proxy/ProxyAdmin.sol/ProxyAdmin.json';
It appears that the Initializable contract at node_modules/@openzeppelin/upgrades-core/contracts/Initializable.sol is suited for pragma solidity >=0.4.24 <0.7.0;
Further, the contracts over here https://github.com/OpenZeppelin/openzeppelin-upgrades/tree/master/packages/core/contracts/proxy are also suited for pragma solidity ^0.6.0
I believe this is the reason why I am not able to verify the contracts.
Link to github repo: Sample Github Repo