JSON-LD issuer initialization

Procedure

Write the issuer DID of the agent to a ledger or set the agents DID method to did:web.

Create or retrieve a credential schema.

For JSON-LD and BBS+ credentials, the credential schema consists of JSON-LD context URLs or inline objects.

For example, the following command creates a credential schema for issuing a credential to a citizen of a country.

curl --location 'https://${service_url}/v2.0/diagency/credential_schemas' \
   --header 'Content-Type: application/json' \
   --header 'Authorization: Bearer ${issuer1_verifiable_credentials_access_token}' \
   --data '{
       "name": "citizen",
       "version": "1.0",
       "contexts": [
           "https://www.w3.org/2018/credentials/v1",
           "https://w3id.org/citizenship/v1"
       ]
   }'

Create a credential definition: A credential definition uniquely identifies the issuing agent and the attributes that are included in the credential. It is created by using the schema ID. A credential schema contains the data model for issuing credentials whereas a credential definition defines the encoding and security aspects of the issued credential.
Create a credential definition for issuer1 associated with the credential schema id.
```
curl --location 'https://${service_url}/v1.0/diagency/credential_definitions' \
    --header 'Content-Type: application/json' \
    --header 'Authorization: Bearer ${issuer1_verifiable_credentials_access_token}' \
    --data ' {
        "schema_id": "d9e80072-58e3-44f0-ad39-be5dfa13a3c2",
        "credential_document_type": ["VerifiableCredential", "PermanentResidentCard"],
        "credential_format": "ldp_vc",
        "cryptographic_binding_methods": ["did:key"],
        "key_proof_types": {
            "di_vp": [ 
                "Ed25519Signature2020" 
            ]
        },
        "cryptographic_binding_methods": [],
        "credential_signing_algorithm": [ "eddsa-rdfc-2022" ],  // Or [ "Ed25519Signature2020" ]
}
```
The response includes the preceding configuration, a copy of the specified schema, and a unique ID for the credential definition.
- For ldp_vp, the value must be an array that contains Ed25519Signature2020 or eddsa-rdfc-2022.
- The supported values for credential_signing_algorithm are:
  - For non-BBS credentials: Ed25519Signature2020 or eddsa-rdfc-2022.
  - For BBS credentials: BbsBlsSignature2020 or bbs-2023.
Optional: To enable status information for credentials issued from this credential definition, add a credential status provider by including the following in the credential definition request body:
```
{
    “credential_status_provider”: {
          “id”: “79d219ee-6da8-45b1-9920-01bb901486c”
          “enabled_status_purposes”: [“revocation”, “suspension”]
    }
}
```
For more information, see Enabling status information.

Note: Enabling the status information for BBS+ is currently not supported.

What to do next

After the issuer initialization is complete, issuer1 can issue a credential to user1.