AaronFiore/electrum
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blockchain fixes

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This commit is contained in:
ThomasV
2017-07-15 13:51:40 +02:00
parent 8834ed9714
commit cf84068fdb
2 changed files with 31 additions and 16 deletions
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28
lib/blockchain.py
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@@ -65,19 +65,27 @@ class Blockchain(util.PrintError):
'''Manages blockchain headers and their verification'''
def __init__(self, config, filename, fork_point):
def __init__(self, config, filename):
self.config = config
self.filename = filename
self.catch_up = None # interface catching up
if fork_point is None:
self.is_saved = True
self.checkpoint = int(filename[16:]) if filename.startswith('blockchain_fork_') else 0
else:
self.is_saved = False
self.checkpoint = fork_point
self.is_saved = True
self.checkpoint = int(filename[16:]) if filename.startswith('blockchain_fork_') else 0
self.headers = []
self.set_local_height()
def fork(parent, fork_point):
self = Blockchain(parent.config, parent.filename)
self.is_saved = False
if parent.is_saved:
self.checkpoint = fork_point
else:
if fork_point > parent.checkpoint:
self.headers = parent.headers[0: fork_point - parent.checkpoint]
else:
self.headers = []
return self
def height(self):
if self.headers:
return self.checkpoint + len(self.headers) - 1
@@ -122,7 +130,7 @@ class Blockchain(util.PrintError):
def save_chunk(self, index, chunk):
if not self.is_saved:
self.fork_and_save()
self.save()
filename = self.path()
with open(filename, 'rb+') as f:
f.seek(index * 2016 * 80)
@@ -130,7 +138,7 @@ class Blockchain(util.PrintError):
h = f.write(chunk)
self.set_local_height()
def fork_and_save(self):
def save(self):
import shutil
self.print_error("save fork")
height = self.checkpoint
@@ -152,7 +160,7 @@ class Blockchain(util.PrintError):
assert height == self.checkpoint + len(self.headers)
self.headers.append(header)
if len(self.headers) > 10:
self.fork_and_save()
self.save()
return
self.write_header(header)