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fix #3635

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This commit is contained in:
ThomasV
2018-01-13 17:09:25 +01:00
parent cc9032c9ea
commit c8e67e2bd0
3 changed files with 18 additions and 23 deletions
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8
lib/blockchain.py
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@@ -181,7 +181,7 @@ class Blockchain(util.PrintError):
if d < 0:
chunk = chunk[-d:]
d = 0
self.write(chunk, d)
self.write(chunk, d, index > len(self.checkpoints))
self.swap_with_parent()
def swap_with_parent(self):
@@ -218,11 +218,11 @@ class Blockchain(util.PrintError):
blockchains[self.checkpoint] = self
blockchains[parent.checkpoint] = parent
def write(self, data, offset):
def write(self, data, offset, truncate=True):
filename = self.path()
with self.lock:
with open(filename, 'rb+') as f:
if offset != self._size*80:
if truncate and offset != self._size*80:
f.seek(offset)
f.truncate()
f.seek(offset)
@@ -263,7 +263,7 @@ class Blockchain(util.PrintError):
elif height == 0:
return bitcoin.NetworkConstants.GENESIS
elif height < len(self.checkpoints) * 2016:
assert (height+1) % 2016 == 0
assert (height+1) % 2016 == 0, height
index = height // 2016
h, t = self.checkpoints[index]
return h