electrum

commit aaf89d2325ce114fab152b17d6cacbe150938e89
parent 24054ac39986c7bf9e1b6e30671606eec493807d
Author: ThomasV <thomasv@electrum.org>
Date:   Fri, 23 Feb 2018 11:30:59 +0100

fix #3858

Diffstat:
M
lib/verifier.py
 | 
9
++++++---

1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/lib/verifier.py b/lib/verifier.py
@@ -36,11 +36,14 @@ class SPV(ThreadJob):
         self.merkle_roots = {}
 
     def run(self):
-        if not self.network.interface:
+        interface = self.network.interface
+        if not interface:
+            return
+        blockchain = interface.blockchain
+        if not blockchain:
             return
         lh = self.network.get_local_height()
         unverified = self.wallet.get_unverified_txs()
-        blockchain = self.network.blockchain()
         for tx_hash, tx_height in unverified.items():
             # do not request merkle branch before headers are available
             if (tx_height > 0) and (tx_height <= lh):
@@ -48,7 +51,7 @@ class SPV(ThreadJob):
                 if header is None:
                     index = tx_height // 2016
                     if index < len(blockchain.checkpoints):
-                        self.network.request_chunk(self.network.interface, index)
+                        self.network.request_chunk(interface, index)
                 else:
                     if tx_hash not in self.merkle_roots:
                         request = ('blockchain.transaction.get_merkle',