feat: billing cancel

external/billing/billing_client.py

@@ -21,6 +21,11 @@ class BillingClient:
         response = await self._method('POST', '/create', json=json_data)
         return CreateBillingResponseSchema.model_validate(response)
 
+    async def delete(self, request: DeleteBillRequestSchema) -> DeleteBillResponseSchema:
+        method = f'/delete/{request.listener_transaction_id}'
+        response = await self._method('POST', method)
+        return DeleteBillResponseSchema.model_validate(response)
+
     async def notify_received(self, request: NotifyReceivedBillRequestSchema) -> NotifyReceivedBillResponseSchema:
         json_data = request.model_dump()
         response = await self._method('POST', '/notify-received', json=json_data)

external/billing/schemas.py

@@ -45,6 +45,14 @@ class CreateBillRequestSchema(BaseSchema):
         return None
 
 
+class DeleteBillRequestSchema(BaseSchema):
+    listener_transaction_id: int
+
+
+class DeleteBillResponseSchema(BaseSchema):
+    ok: bool
+
+
 class NotifyReceivedBillRequestSchema(BaseSchema):
     listener_transaction_id: int
     channel: NotificationChannel