From 5872bd4722eb7058781b1e4767ea619684aa3d16 Mon Sep 17 00:00:00 2001
From: ThomasV <thomasv@electrum.org>
Date: Thu, 3 Aug 2017 14:25:50 +0200
Subject: [PATCH] force new headers download if file is corrupted

---
 lib/blockchain.py | 2 +-
 lib/network.py    | 5 +++--
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/lib/blockchain.py b/lib/blockchain.py
index a02799b7..ba9d7d2b 100644
--- a/lib/blockchain.py
+++ b/lib/blockchain.py
@@ -258,7 +258,7 @@ class Blockchain(util.PrintError):
         return deserialize_header(h, height)
 
     def get_hash(self, height):
-        return bitcoin.GENESIS if height == 0 else hash_header(self.read_header(height))
+        return hash_header(self.read_header(height))
 
     def BIP9(self, height, flag):
         v = self.read_header(height)['version']
diff --git a/lib/network.py b/lib/network.py
index e6c32beb..1a45c313 100644
--- a/lib/network.py
+++ b/lib/network.py
@@ -946,10 +946,11 @@ class Network(util.DaemonThread):
             self.process_responses(interface)
 
     def init_headers_file(self):
-        filename = self.blockchains[0].path()
-        if os.path.exists(filename):
+        b = self.blockchains[0]
+        if b.get_hash(0) == bitcoin.GENESIS:
             self.downloading_headers = False
             return
+        filename = b.path()
         def download_thread():
             try:
                 import urllib, socket