Etherscan V2 workaround

[sparrowDom]

Etherscan has migrated to V2 api for the contract verification. There are guides on how to migrate, but I couldn't get a workable combination of packages. Increasing some of the versions also introduces great breaking changes.

This PR finds a workaround on how to verify contracts by forcing a V2 api with the necessary chainId get parameter without any changes to the installed packages

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 34.94%. Comparing base (c267e54) to head (83ec494).
⚠️ Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2679      +/-   ##
==========================================
- Coverage   38.28%   34.94%   -3.34%     
==========================================
  Files         112      112              
  Lines        5331     5331              
  Branches     1412     1412              
==========================================
- Hits         2041     1863     -178     
- Misses       3289     3466     +177     
- Partials        1        2       +1     

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[naddison36]

Not great that hardhat-etherscan no longer works but it'll have to do for now. hardhat-verify works but it a pain when there are constructor parameters. It's manageable, though.

[naddison36]

Can we add an example with a constructor parameter. This one is from the deployment template in Notion

echo "module.exports = [{
  platformAddress: \"0x0000000000000000000000000000000000000001\",
  vaultAddress: \"0xe75d77b1865ae93c7eaa3040b038d7aa7bc02f70\",
}]" > flux-args.js
npx hardhat --network mainnet verify --contract contracts/strategies/FluxStrategy.sol:FluxStrategy --constructor-args flux-args.js 0x57d49c28Cf9A0f65B1279a97eD01C3e49a5A173f