Hello, I’m having a problem with the validation of a certificate, I’m able to issue a certificate to the ethereum ropsten chain, but when I try to validate it I keep getting this error:
I’ve also tried changing the issuer but I get instead an error like this at the verifier:
ErrorNot a valid Blockcerts credential. Please check with the issuer or recipient that has provided this credential.
I’ll leave here also the link to my issuer json
I would like to know what is wrong with my issuer profile.
I would appreciate a lot any kinds of help!!
The error you are getting is because the transaction data (the blockchain transaction that is) cannot be retrieved.
It is either because you are testing your cert too early after issuance and the transaction has not propagated on the blockchain (not enough confirmations) or because the transaction referenced does not exist but that would be quite surprising since I am not aware of such a (major) issue.
As far as I can tell your issuer profile looks correct.
When this error comes up
ErrorNot a valid Blockcerts credential. Please check with the issuer or recipient that has provided this credential.
You may have access to a more explicit, technical error in the developer console of your browser. You could have a look at that.
@lemoustachiste @juaneltemible
i’m also facing the similar issue
In the console, I can see Didn’t recognize chain value.
I’m using ethereum_sepolia chain
@lemoustachiste
Here is the certificate content
{“@context”: [“https://www.w3.org/2018/credentials/v1”, “https://w3id.org/blockcerts/v3”], “type”: [“VerifiableCredential”, “BlockcertsCredential”], “issuer”: “https://raw.githubusercontent.com/sreenumalae/DataStorage/main/testissuer.json”, “issuanceDate”: “2022-10-31T11:31:03Z”, “id”: “urn:uuid:af05c673-02f2-430f-aefc-5256f053c39a”, “credentialSubject”: {“id”: “ecdsa-koblitz-pubkey:mtr98kany9G1XYNU74pRnfBQmaCg2FZLmc”, “alumniOf”: {“id”: “https://www.human-logic.com/”}}, “proof”: {“type”: “MerkleProof2019”, “created”: “2022-10-31T12:05:00.478050”, “proofValue”: “znKD4YGVqA8textxikpfbsSQxuWguMznNeK95EspXveCLCWTH9xVEyuRBGUL1qrGrvRJDUDrSrdP5nxZWwZDWPFMru2xHaLJaEgX7QpL92giUyTYLviqxsU3snV2qrpGGtsGYp1CpMSdsWRYCqkbnBT5s9Yh6q4j8HkYCC5Tq9AAezkiaqcMBUcUDMTkrrou4zPY5nEoRqmZCR4aq5gexwCKPahJfpCVp7hG1q84JjoVjRybzWXANbCaQqJQN6VZ5bn1My9kUwYYP6g8EByfTK9nvjraWsyVwjT9eZDWgKVU6VxtpmmNAY8HbiM”, “proofPurpose”: “assertionMethod”, “verificationMethod”: “URL”}}
it looks like your proof is malformed:
{
path: [],
merkleRoot: '635a5828df1cbd886111e9ffee82c1c9072a12f5ae82fa6300115eb3de3d7f4c',
targetHash: '635a5828df1cbd886111e9ffee82c1c9072a12f5ae82fa6300115eb3de3d7f4c',
anchors: [
'blink:eth:undefined:0x8b4db734457fe3c5d590dc38040a9573ae5a9f8201c5b3d0b75019d43450ada6'
]
}
the anchor does not reference Sepolia but undefined.
So it could be an issue with cert-issuer maybe? How is your conf.ini defined?
My conf.ini in cert-issuer
issuing_address = 0x4d6919d34132C6963cfEe665309C6079822795BB
verification_method = URL
chain= ethereum_sepolia
usb_name = </Volumes/path-to-usb/>
key_file = /home/azureuser/blockchain_attempt2/cert-issuer/data/keyfile.txt
unsigned_certificates_dir=/home/azureuser/blockchain_attempt2/cert-tools/sample_data/unsigned_certificates
blockchain_certificates_dir=/home/azureuser/blockchain_attempt2/cert-tools/sample_data/signed
work_dir=/home/azureuser/blockchain_attempt2/cert-issuer/data/work
no_safe_mode
so I’ve got an error and I cannot issue on sepolia anyway:
raise UnknownChainError(app_config.chain)
cert_core.UnknownChainError: Chain.ethereum_sepolia
How did you issue the certificate?
Ok I think I’m getting the above error due to some python shenanigans on my machine. Trying to sort it out
Ok so it looks like cert-issuer works ok, here is my anchor for an issuance on sepolia:
blink:eth:sepolia:0x1f615470024000c3ab532ed74c5a60b8f6c2feb6489a67be20f103831996f9ab
you should maybe try and issue again
@lemoustachiste
I tried to install it again and followed the whole process again from the fist.
Successfully I created both unsigned and signed certificates and the issue still remains same.
Here is my signed certificate:
{"@context": ["https://www.w3.org/2018/credentials/v1", "https://w3id.org/blockcerts/v3"], "type": ["VerifiableCredential", "BlockcertsCredential"], "issuer": "https://raw.githubusercontent.com/sreenumalae/DataStorage/main/testissuer.json", "issuanceDate": "2022-11-03T09:28:54Z", "id": "urn:uuid:004873c9-c21b-4f33-aae6-714eb964f626", "credentialSubject": {"id": "ecdsa-koblitz-pubkey:mkwntSiQmc14H65YxwckLenxY3DsEpvFbe", "alumniOf": {"id": "https://www.human-logic.com/"}}, "nonce": "1", "proof": {"type": "MerkleProof2019", "created": "2022-11-03T10:54:42.597456", "proofValue": "z9nmN4tsD8AYm9oa7cgcUrCN4Lqecj7HMdoAz1UbYbw8PLrmc2GoFJiV5bk9xXcWDbKsidjXSBoBsp7DqZX4WDfPS3sfTyt9vKrCE2NYjxS34TEmBhVW9uirAhM6uLq9QtxjLX8xu3wTaGSZrf8SHiHY9fUEVm9JufBjvD7axpkdGiEc48yQLynnVYEUtBZWTkVmwTkPg2XQWUNE6hPr9CcpmXBF5VBgxqaps9pyZmzaBBrGuiVJ7p3BD5c8d7C4AA2rbVPhPXTjK34ddVzDTy7W2XYfDrFE1jHmF87sYUzeVEWkwTzrNMQ5xWhwjvS9TwUo78272FgeW4TsKjZy7hyQ8tcAfeL5SH23uJetwMSn8qoQCJ9YngcWF3BqKrBGy6FZvjATvLHdGuCBjPcL5BhCPhP", "proofPurpose": "assertionMethod", "verificationMethod": "URL"}}
anchor for an issuance on sepolia
INFO - merkle_json: {‘path’: [{‘right’: ‘94b0236ef84cb4f5a32e5d66b47424d6d068908d3e6bc6eea13c35aaf4211c1b’}], ‘merkleRoot’: ‘a845bf3d74a5aa78b5ade32c44583640645b4459e651b4314830afb5b439dab0’, ‘targetHash’: ‘8885070fede3b20e463cc225436d604d9f312789fbbfe498270e1f130ade74d4’, ‘anchors’: [‘blink:eth:sepolia:0xe7a23bbb0150c8d0594f4241c29fb7da946daad7deac4a9644f1469d51351546’]}
INFO - merkle_json: {‘path’: [{‘left’: ‘8885070fede3b20e463cc225436d604d9f312789fbbfe498270e1f130ade74d4’}], ‘merkleRoot’: ‘a845bf3d74a5aa78b5ade32c44583640645b4459e651b4314830afb5b439dab0’, ‘targetHash’: ‘94b0236ef84cb4f5a32e5d66b47424d6d068908d3e6bc6eea13c35aaf4211c1b’, ‘anchors’: [‘blink:eth:sepolia:0xe7a23bbb0150c8d0594f4241c29fb7da946daad7deac4a9644f1469d51351546’]}
INFO - Broadcast transaction with txid 0xe7a23bbb0150c8d0594f4241c29fb7da946daad7deac4a9644f1469d51351546
@lemoustachiste
As i can see the issuance is also similar to the one you created.
Kindly help me out with this issue
Thanks in Advance
I’ve finally figured out the issue, I’m working on the fix
I’m still facing issues, I think I should be able to resolve by tomorrow
1 Like
it’s in PR, but some tests on the master branch that were working 2 weeks ago are now failing and I need to investigate why.
So the code in this PR will verify a Sepolia or Goerli anchored cert: fix(Sepolia): ensure sepolia anchored verification by lemoustachiste · Pull Request #1447 · blockchain-certificates/cert-verifier-js · GitHub
If you feel bold enough you can use this branch, either directly locally with a copy of CVJS, or installing it to a local copy of blockcerts-verifier. At least that’s a way to have you unblocked while I figure out why those tests are suddenly failing.
Thank you @lemoustachiste
I will try to use the PR and install it in my local drive.
Blockcerts Verifier has been updated, and it’s live on blockcerts.org
Thanks @lemoustachiste for the update <3
