OID4VC: Addition of OID4VCI Notification Endpoint - DRAFT 15 Support

[timbl-ont]

The notification endpoint was added in draft 13 of the oid4vci specification. This optional endpoint is used by the wallet to notify the issuer that a credential has been received.

Implementation as per the draft 15 specification - https://openid.net/specs/openid-4-verifiable-credential-issuance-1_0.html#name-notification-endpoint (section 10)

Note that support for this endpoint requires that the issuer include a notification_id with each Credential response.

A webhook should be used to send the notification status to the controller.