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Issue Verifiable Credential with Encrypted Status List 2021 and index

Issue Credential with Encrypted Status List

Issue Verifiable Credential with Encrypted Status List 2021 Resource

There is a specific transaction type for issuing Verifiable Credentials that reference encrypted Status List Resources.

Step 1: Create an encrypted Status List on-ledger

Follow the tutorial here to create an encrypted Status List 2021 Resource on cheqd.

Charge for Status ListCreate an encrypted Status List on cheqd with payment conditions, unlockable on payment of CHEQcharge.md

Step 2: Choose index number for Credential

Each encrypted Status List is a bitstring, where each bit represents a Credential which is either revoked or unrevoked (or suspended or unsuspended).

{% hint style="info" %} Users should maintain and manage a list of which Credentials match with which specific bitstring indices to be able to revoke or suspend Credentials in the future, and to avoid collisions. {% endhint %}

When issuing a Credential, you have the choice of whether to manually specify an index for the Credential within the bitstring, or randomly generate an index number anywhere in the bitstring, or within a given range.

Step 2: Construct Credential Payload with Status List

As mentioned above, when constructing the payload for your Credential, including the encrypted Resource, you have a choice of how you would like to specify the index.

The following parameters may be included:

Parameter Value Optional
"statusPurpose" "revocation" or "suspension" No
"statusListName" string No
"statusListVersion" string Yes
"statusListRangeStart" number Yes
"statusListRangeEnd" number Yes
"statusListVersion" number, or set of numbers Yes

Below are a set of examples of how these parameters may be included in Credential payload files for different purposes:

Example Request Format: Random Bitstring index 
{
    "issuanceOptions": {
        "credential": {
            "credentialSubject": {
                "name": "tweeddalex",
                "id": "did:key:z6MkvG4dpKVpYwYqnwcjRdw8VZ3km4Sisgxm1igaPCFzskxe"
            },
            "issuer": {
                "id": "did:cheqd:testnet:322761ea-587d-454a-a955-745200301b99"
            },
            "type": [
                "VerifiableCredential"
            ],
            "@context": [
                "https://www.w3.org/2018/credentials/v1",
                "https://veramo.io/contexts/profile/v1"
            ]
        }
    },
    "statusOptions": {
        "statusPurpose": "revocation",
        "statusListName": "status-list-2021-encrypted"
    }
}
Example Request Format: Specified Bitstring index 
{
    "issuanceOptions": {
        "credential": {
            "credentialSubject": {
                "name": "tweeddalex",
                "id": "did:key:z6MkvG4dpKVpYwYqnwcjRdw8VZ3km4Sisgxm1igaPCFzskxe"
            },
            "issuer": {
                "id": "did:cheqd:testnet:322761ea-587d-454a-a955-745200301b99"
            },
            "type": [
                "VerifiableCredential"
            ],
            "@context": [
                "https://www.w3.org/2018/credentials/v1",
                "https://veramo.io/contexts/profile/v1"
            ]
        }
    },
    "statusOptions": {
        "statusPurpose": "revocation",
        "statusListName": "status-list-2021-encrypted",
        "statusListIndex": 1456
    }
}
Example Request Format: Bitstring index within a given range 
{
    "issuanceOptions": {
        "credential": {
            "credentialSubject": {
                "name": "tweeddalex",
                "id": "did:key:z6MkvG4dpKVpYwYqnwcjRdw8VZ3km4Sisgxm1igaPCFzskxe"
            },
            "issuer": {
                "id": "did:cheqd:testnet:322761ea-587d-454a-a955-745200301b99"
            },
            "type": [
                "VerifiableCredential"
            ],
            "@context": [
                "https://www.w3.org/2018/credentials/v1",
                "https://veramo.io/contexts/profile/v1"
            ]
        }
    },
    "statusOptions": {
        "statusPurpose": "revocation",
        "statusListName": "status-list-2021-encrypted",
        "statusListRangeStart": 2000,
        "statusListRangeEnd": 3000
    }
}
Example Request Format: Bitstring including omitted bits 
{
    "issuanceOptions": {
        "credential": {
            "credentialSubject": {
                "name": "tweeddalex",
                "id": "did:key:z6MkvG4dpKVpYwYqnwcjRdw8VZ3km4Sisgxm1igaPCFzskxe"
            },
            "issuer": {
                "id": "did:cheqd:testnet:322761ea-587d-454a-a955-745200301b99"
            },
            "type": [
                "VerifiableCredential"
            ],
            "@context": [
                "https://www.w3.org/2018/credentials/v1",
                "https://veramo.io/contexts/profile/v1"
            ]
        }
    },
    "statusOptions": {
        "statusPurpose": "revocation",
        "statusListName": "status-list-2021-encrypted",
        "statusListRangeStart": 10,
        "statusListRangeEnd": 3000,
        "indexNotIn": 13, 1807, 2434
    }
}

{% hint style="info" %} Ensure that the "statusPurpose" and "statusListName" is the same as the existing Status List on-ledger, created in Step 1. {% endhint %}

Step 3: Execute the transaction

Once you have constructed your payload file, and have saved it as a JSON file, use the transaction below to issue the Verifiable Credential.

veramo execute -m cheqdIssueRevocableCredentialWithStatusList2021 --argsFile path/to/payload.json

Response format

If the transaction is successful, you will get returned a formatted Verifiable Credential, including a populated "credentialStatus" section.

Example Response Format 
Result : {
  "credentialSubject": {
    "name": "tweeddalex",
    "id": "did:key:z6MkvG4dpKVpYwYqnwcjRdw8VZ3km4Sisgxm1igaPCFzskxe"
  },
  "issuer": {
    "id": "did:cheqd:testnet:cc8e5d9f-05f8-4f09-93c5-b9dba4b45404"
  },
  "type": [
    "VerifiableCredential"
  ],
  "credentialStatus": {
    "id": "https://resolver.cheqd.net/1.0/identifiers/did:cheqd:testnet:cc8e5d9f-05f8-4f09-93c5-b9dba4b45404?resourceName=testing-payment-rails&resourceType=StatusList2021Revocation#123979",
    "type": "StatusList2021Entry",
    "statusPurpose": "revocation",
    "statusListIndex": "123979"
  },
  "@context": [
    "https://www.w3.org/2018/credentials/v1",
    "https://veramo.io/contexts/profile/v1",
    "https://w3id.org/vc-status-list-2021/v1"
  ],
  "issuanceDate": "2023-08-18T01:39:53.000Z",
  "proof": {
    "type": "JwtProof2020",
    "jwt": "eyJhbGciOiJFZERTQSIsInR5cCI6IkpXVCJ9.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.RPt5D021S0MzUscptUc0CZtK9a2sEvGYOkJkx0EO8xqQwTIQRfL7-Z-ZTbOo2OiHs-kDrXQ8SbTMf2yk1QR_Ag"
  }
}