Create VC with type EthereumEip712Signature2021

create_vc_712.py

from copy import copy, deepcopy
from pprint import pprint
import didkit
import asyncio
import json

# JWK = '{"kty":"OKP","crv":"Ed25519","x":"PBcY2yJ4h_cLUnQNcYhplu9KQQBNpGxP4sYcMPdlu6I","d":"n5WUFIghmRYZi0rEYo2lz-Zg2B9B1KW4MYfJXwOXfyI"}'
JWK = '{"kty":"EC","crv":"secp256k1","x":"PdB2nS-knyAxc6KPuxBr65vRpW-duAXwpeXlwGJ03eU","y":"MwoGZ08hF5uv-_UEC9BKsYdJVSbJNHcFhR1BZWer5RQ","d":"z9VrSNNZXf9ywUx3v_8cLDhSw8-pvAT9qu_WZmqqfWM"}'


async def main():
    print("#" * 80)
    # did = didkit.key_to_did("key", JWK)
    did = didkit.key_to_did("ethr", JWK)

    print("issuer: ", did)
    credential = {
        "type": ["VerifiableCredential"],
        "issuer": did,
        "@context": [
            "https://www.w3.org/2018/credentials/v1",
            "https://w3id.org/vc/status-list/2021/v1",  # for credentialStatus
        ],
        "issuanceDate": "2022-07-19T10:42:24.883Z",
        "expirationDate": "2022-10-17T10:42:24.883Z",
        "credentialSubject": {
            "@context": {
                "hash": "https://schema.org/Text",
                "provider": "https://schema.org/Text",
                "metaPointer": "https://schema.org/URL",
                "customInfo": "https://schema.org/Thing",
            },
            "id": "did:pkh:eip155:1:0x12FeD9f987bc340c6bE43fD80aD641E8cD740682",
            "hash": "v0.0.0:AjcRjxx7Hp3PKPSNwPeBJjR21pLyA14CVeQ1XijzxUc=",
            "provider": "Twitter",
            "metaPointer": "https://gitcoin.co/docs.html",
            "customInfo": {
                "field1": "value",
            },
        },
        "credentialStatus": {
            "id": "https://example.edu/credentials/status/3#94567",
            "type": "StatusList2021Entry",
            "statusPurpose": "revocation",
            "statusListIndex": "94567",
            "statusListCredential": "https://example.edu/credentials/status/3",
        },
    }

    ###################################################
    # Issue credential
    # options = {"type": "Eip712Signature2021"}

    verification_method = await didkit.key_to_verification_method("ethr", JWK)
    print("verification_method:", verification_method)

    options = {
        # "proofPurpose": "assertionMethod",
        "type": "EthereumEip712Signature2021",
        "verificationMethod": verification_method,
    }

    # options = {}
    credential = await didkit.issue_credential(
        json.dumps(credential), json.dumps(options), JWK
    )

    print("CREDENTIAL")
    print(json.dumps(json.loads(credential), indent=2))
    print("-" * 80)
    ###################################################
    # Verify
    print("Verify - success case")
    verification = await didkit.verify_credential(
        credential, '{"proofPurpose":"assertionMethod"}'
    )
    print(verification)
    print("-" * 80)

    ###################################################
    # Verify with error
    print("Verify - error case")
    credential_with_error = json.loads(credential)
    credential_with_error["credentialSubject"]["customInfo"]["field"] = "bad_value"
    verification = await didkit.verify_credential(
        json.dumps(credential_with_error), '{"proofPurpose":"assertionMethod"}'
    )

    print(verification)
    print("-" * 80)


asyncio.run(main())