Verifying contract is failing on rinkeby network

[hecomp]

`Error in plugin @nomiclabs/hardhat-etherscan: The contract verification failed.
Reason: Fail - Unable to verify

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.`

[h0rizons]

I'm also getting the same issue using the most recent pull.

[Error - 9:40:12 PM] solc error: TypeError: solc.compileStandardWrapper is not a function
[Error - 9:40:12 PM] solc error: TypeError: solc.compileStandardWrapper is not a function

I had everything verifying perfectly on the version from around a week ago.

[h0rizons]

I just downloaded the v1.0.1 that had initially been working for me, followed every step to the T, and I'm getting the verification failure on this build as well.

[hecomp]

Yeah same here @h0rizons. Yesterday was flawless but today not so much everything else works minting, WL, Presale, Public Sale, reveal. I don't know if is rinkeby restriction for verification.

[liarco]

Hi @hecomp and @h0rizons,
thank you for letting me know about this, it might be related to NomicFoundation/hardhat#2437.

Can you please run the following command inside the /smart-contract folder and try again?

> yarn upgrade @nomiclabs/hardhat-etherscan

If this solves the issue we are gonna update the dependency and push a new commit to main. Thank you!

[liarco]

Sorry, I forgot to mention that you should also update the version number in the /smart-contract/package.json file before running yarn upgrade ...:

    "@nomiclabs/hardhat-etherscan": "^3.0.3",

[cptlchad]

Was a problem on etherscan and is fixed now

[hecomp]

@liarco @cptlchad I've tried and is working fine again. Thanks for the support and fix.

[liarco]

Thank you guys, gonna close this but feel free to open a new issue if anything strange happens again! 😉

[h0rizons]

Hmm I'm still getting the error. I got it to successfully verify last night, and I tried again today with a new contract and I'm getting the error again. I tried your suggestions and got everything updated successfully, but it still isn't working. Thanks for your help - really appreciate it.

Error in plugin @nomiclabs/hardhat-etherscan: The contract verification failed. Reason: Fail - Unable to verify

[liarco]

Hi @h0rizons,
unfortunately we are all on the same boat. I'm busy testing #29 before merging it but I can't get my testing contracts to verify properly. It seems like the issue is on Etherscan side since other projects report the same thing and this happens without any change on our side: NomicFoundation/hardhat#2447

I'm afraid we just have to wait... 😞

[h0rizons]

Sorry @liarco, I saw your earlier comment and thought that it was sorted.

So none of the versions will verify on rinkeby right now?

[liarco]

@h0rizons it was working until a few hours ago, but it might be Etherscan's fault here. The verification service is not working properly and chances are:

1. Something is broken on Etherscan's side so they have to fix that
2. The Hardhat library might need to be updated in order to fix this but as you can see from the issue I mentioned above they claim there is nothing wrong on their side and people should contact Etherscan

At the moment I got reports from users failing to verify on Rinkeby, not the Mainnet. But I haven't had the chance to test the Mainnet myself.

[liarco]

@h0rizons everything is working again on my side (nothing changed) so I think this has nothing to do with our code, nor the library. It's probably something wrong with Etherscan.

[hamhocks]

I'm having the same problem plugin error but can't figure out if its hardhat or etherscan.

[liarco]

@hamhocks it's a known issue these days, the Hardhat team states it's not their fault (and it sounds possible since verification fails/succeeds randomly without any change in the code), so Etherscan seems to be the culprit here.

Here are some references to relevant issues:

• Etherscan Verify not working on Rinkeby NomicFoundation/hardhat#2447
• Verifying a contract with  NomicFoundation/hardhat#2448
• verification of contract with hardhat-etherscan broken again NomicFoundation/hardhat#2465

Anyway this seems not related to our code specifically.