specify webhooks from invoice creation and call them.

lnbits/core/tasks.py

@@ -1,4 +1,5 @@
 import trio  # type: ignore
+import httpx
 from typing import List
 
 from lnbits.tasks import register_invoice_listener
@@ -14,9 +15,18 @@ async def register_listeners():
 
 async def wait_for_paid_invoices(invoice_paid_chan: trio.MemoryReceiveChannel):
     async for payment in invoice_paid_chan:
+        # send information to sse channel
         for send_channel in sse_listeners:
             try:
                 send_channel.send_nowait(payment)
             except trio.WouldBlock:
                 print("removing sse listener", send_channel)
                 sse_listeners.remove(send_channel)
+
+        # dispatch webhook
+        if payment.extra and "webhook" in payment.extra:
+            async with httpx.AsyncClient() as client:
+                try:
+                    await client.post(payment.extra["webhook"], json=payment._asdict(), timeout=40)
+                except (httpx.ConnectError, httpx.RequestError):
+                    pass