From: fsb4000 <fsb4000@yandex.ru>
Date: Mon, 20 Jul 2015 11:17:58 +0000 (+0600)
Subject: fix server crash due to orphaned block in header file
X-Git-Url: https://git.novaco.in/?p=electrum-server.git;a=commitdiff_plain;h=035aa7f9f568aaed81dbb950042713e19b1ee140

fix server crash due to orphaned block in header file
---

diff --git a/backends/bitcoind/blockchain_processor.py b/backends/bitcoind/blockchain_processor.py
index 3d93fd8..7f65aa6 100644
--- a/backends/bitcoind/blockchain_processor.py
+++ b/backends/bitcoind/blockchain_processor.py
@@ -158,10 +158,17 @@ class BlockchainProcessor(Processor):
 
         try:
             while height < db_height:
-                height = height + 1
+                height += 1
                 header = self.get_header(height)
                 if height > 1:
-                    assert prev_hash == header.get('prev_block_hash')
+                    if prev_hash != header.get('prev_block_hash'):
+                        # The prev_hash block is orphaned, go back
+                        print_log("reorganizing, a block in file is orphaned:", prev_hash)
+                        # Go to the parent of the orphaned block
+                        height -= 2
+                        prev_hash = self.hash_header(self.read_header(height))
+                        continue
+
                 self.write_header(header, sync=False)
                 prev_hash = self.hash_header(header)
                 if (height % 1000) == 0: