fix watchtower: sweep_tx must not be None

6 years ago · dff1822c37
1 changed files with 2 additions and 1 deletions
--- a/electrum/lnsweep.py
+++ b/electrum/lnsweep.py
@ -55,7 +55,8 @@ def create_sweeptxs_for_their_revoked_ctx(chan: 'Channel', ctx: Transaction, per
            witness_script=witness_script,
            privkey=other_revocation_privkey,
            is_revocation=True)
-        txs.append(sweep_tx)
+        if sweep_tx:
+            txs.append(sweep_tx)
    # HTLCs
    def create_sweeptx_for_htlc(htlc: 'UpdateAddHtlc', is_received_htlc: bool) -> Tuple[Optional[Transaction],
                                                                                      Optional[Transaction],