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129 lines
3.1 KiB
129 lines
3.1 KiB
#!/usr/bin/python |
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# |
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# linearize.py: Construct a linear, no-fork, best version of the blockchain. |
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# |
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# |
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# Copyright (c) 2013 The Bitcoin developers |
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# Distributed under the MIT/X11 software license, see the accompanying |
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# file COPYING or http://www.opensource.org/licenses/mit-license.php. |
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# |
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import json |
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import struct |
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import re |
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import base64 |
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import httplib |
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import sys |
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ERR_SLEEP = 15 |
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MAX_NONCE = 1000000L |
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settings = {} |
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class BitcoinRPC: |
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OBJID = 1 |
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def __init__(self, host, port, username, password): |
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authpair = "%s:%s" % (username, password) |
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self.authhdr = "Basic %s" % (base64.b64encode(authpair)) |
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self.conn = httplib.HTTPConnection(host, port, False, 30) |
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def rpc(self, method, params=None): |
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self.OBJID += 1 |
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obj = { 'version' : '1.1', |
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'method' : method, |
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'id' : self.OBJID } |
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if params is None: |
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obj['params'] = [] |
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else: |
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obj['params'] = params |
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self.conn.request('POST', '/', json.dumps(obj), |
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{ 'Authorization' : self.authhdr, |
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'Content-type' : 'application/json' }) |
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resp = self.conn.getresponse() |
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if resp is None: |
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print "JSON-RPC: no response" |
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return None |
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body = resp.read() |
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resp_obj = json.loads(body) |
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if resp_obj is None: |
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print "JSON-RPC: cannot JSON-decode body" |
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return None |
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if 'error' in resp_obj and resp_obj['error'] != None: |
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return resp_obj['error'] |
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if 'result' not in resp_obj: |
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print "JSON-RPC: no result in object" |
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return None |
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return resp_obj['result'] |
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def getblock(self, hash, verbose=True): |
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return self.rpc('getblock', [hash, verbose]) |
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def getblockhash(self, index): |
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return self.rpc('getblockhash', [index]) |
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def getblock(rpc, settings, n): |
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hash = rpc.getblockhash(n) |
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hexdata = rpc.getblock(hash, False) |
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data = hexdata.decode('hex') |
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return data |
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def get_blocks(settings): |
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rpc = BitcoinRPC(settings['host'], settings['port'], |
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settings['rpcuser'], settings['rpcpass']) |
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outf = open(settings['output'], 'wb') |
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for height in xrange(settings['max_height']+1): |
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data = getblock(rpc, settings, height) |
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outhdr = settings['netmagic'] |
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outhdr += struct.pack("<i", len(data)) |
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outf.write(outhdr) |
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outf.write(data) |
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if (height % 1000) == 0: |
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sys.stdout.write("Wrote block " + str(height) + "\n") |
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if __name__ == '__main__': |
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if len(sys.argv) != 2: |
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print "Usage: linearize.py CONFIG-FILE" |
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sys.exit(1) |
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f = open(sys.argv[1]) |
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for line in f: |
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# skip comment lines |
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m = re.search('^\s*#', line) |
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if m: |
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continue |
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# parse key=value lines |
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m = re.search('^(\w+)\s*=\s*(\S.*)$', line) |
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if m is None: |
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continue |
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settings[m.group(1)] = m.group(2) |
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f.close() |
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if 'netmagic' not in settings: |
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settings['netmagic'] = 'f9beb4d9' |
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if 'output' not in settings: |
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settings['output'] = 'bootstrap.dat' |
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if 'host' not in settings: |
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settings['host'] = '127.0.0.1' |
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if 'port' not in settings: |
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settings['port'] = 8332 |
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if 'max_height' not in settings: |
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settings['max_height'] = 250000 |
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if 'rpcuser' not in settings or 'rpcpass' not in settings: |
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print "Missing username and/or password in cfg file" |
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sys.exit(1) |
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settings['netmagic'] = settings['netmagic'].decode('hex') |
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settings['port'] = int(settings['port']) |
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settings['max_height'] = int(settings['max_height']) |
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get_blocks(settings) |
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