bff for callbacks

interface/models/callback/callback.yaml

@@ -0,0 +1,67 @@
+components:
+  schemas:
+    CallbackRetryPolicy:
+      type: object
+      additionalProperties: false
+      required:
+        - minDelayMs
+        - maxDelayMs
+        - signingMode
+        - maxAttempts
+        - requestTimeoutMs
+      properties:
+        minDelayMs:
+          type: integer
+          minimum: 1
+        maxDelayMs:
+          type: integer
+          minimum: 1
+        signingMode:
+          type: string
+          enum:
+            - none
+            - hmac_sha256
+        secretRef:
+          type: string
+          nullable: true
+        headers:
+          type: object
+          additionalProperties:
+            type: string
+        maxAttempts:
+          type: integer
+          minimum: 1
+        requestTimeoutMs:
+          type: integer
+          minimum: 1
+
+    Callback:
+      allOf:
+        - $ref: ../permission_bound.yaml#/components/schemas/PermissionBound
+        - $ref: ../common/describable.yaml#/components/schemas/Describable
+        - type: object
+          additionalProperties: false
+          required:
+            - clientId
+            - status
+            - url
+            - eventTypes
+            - retryPolicy
+          properties:
+            clientId:
+              type: string
+            status:
+              type: string
+              enum:
+                - active
+                - disabled
+            url:
+              type: string
+              format: uri
+            eventTypes:
+              type: array
+              items:
+                type: string
+            retryPolicy:
+              $ref: '#/components/schemas/CallbackRetryPolicy'
+