Fix estimate minning fee on testnet

api/lightning/lnd.py

@@ -71,6 +71,8 @@ class LNDNode:
         5: "Insufficient local balance.",
     }
 
+    is_testnet = lightningstub.GetInfo(lnrpc.GetInfoRequest()).testnet
+
     @classmethod
     def get_version(cls):
         try:
@@ -92,9 +94,14 @@ class LNDNode:
     def estimate_fee(cls, amount_sats, target_conf=2, min_confs=1):
         """Returns estimated fee for onchain payouts"""
 
+        if cls.is_testnet:
+            dummy_address = "tb1qehyqhruxwl2p5pt52k6nxj4v8wwc3f3pg7377x"
+        else:
+            dummy_address = "bc1qgxwaqe4m9mypd7ltww53yv3lyxhcfnhzzvy5j3"
+
         # We assume segwit. Use hardcoded address as shortcut so there is no need of user inputs yet.
         request = lnrpc.EstimateFeeRequest(
-            AddrToAmount={"bc1qgxwaqe4m9mypd7ltww53yv3lyxhcfnhzzvy5j3": amount_sats},
+            AddrToAmount={dummy_address: amount_sats},
             target_conf=target_conf,
             min_confs=min_confs,
             spend_unconfirmed=False,