add payment notification

async-api/waas-async-api.yaml

@@ -31,7 +31,7 @@ channels:
         name: Payment completed notification
         description: |
           WaaS partner will receive notification when payment in Profee system get final status.
-          If block "error" is empty payment considered successful.
+          If block "state" is SUCCESSFUL payment considered successful.
           Otherwise, block "errors" will contain error code and human readable message, describing error reason.
 components:
   messages:
@@ -139,9 +139,13 @@ components:
           walletId:
             type: string
             description: Wallet ID
+          state:
+            type: string
+            description: State of payment processing. Can be SUCCESSFUL or FAILED
+            example: SUCCESSFUL
           error:
             type: object
-            description: If empty payment completed successfully
+            description: If payment FAILED contains error details
             properties:
               code:
                 type: string