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move synchronizer class in its own file. abstract wallet class.

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ThomasV
2014-04-30 10:32:40 +02:00
parent 42a5454bd8
commit 7e0711f6ec
3 changed files with 233 additions and 199 deletions
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lib/synchronizer.py Normal file
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#!/usr/bin/env python
#
# Electrum - lightweight Bitcoin client
# Copyright (C) 2014 Thomas Voegtlin
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import threading
import Queue
import bitcoin
from util import print_error
from transaction import Transaction
class WalletSynchronizer(threading.Thread):
def __init__(self, wallet, network):
threading.Thread.__init__(self)
self.daemon = True
self.wallet = wallet
self.network = network
self.was_updated = True
self.running = False
self.lock = threading.Lock()
self.queue = Queue.Queue()
def stop(self):
with self.lock: self.running = False
def is_running(self):
with self.lock: return self.running
def subscribe_to_addresses(self, addresses):
messages = []
for addr in addresses:
messages.append(('blockchain.address.subscribe', [addr]))
self.network.subscribe( messages, lambda i,r: self.queue.put(r))
def run(self):
with self.lock:
self.running = True
while self.is_running():
if not self.network.is_connected():
self.network.wait_until_connected()
self.run_interface()
def run_interface(self):
print_error("synchronizer: connected to", self.network.main_server())
requested_tx = []
missing_tx = []
requested_histories = {}
# request any missing transactions
for history in self.wallet.history.values():
if history == ['*']: continue
for tx_hash, tx_height in history:
if self.wallet.transactions.get(tx_hash) is None and (tx_hash, tx_height) not in missing_tx:
missing_tx.append( (tx_hash, tx_height) )
if missing_tx:
print_error("missing tx", missing_tx)
# subscriptions
self.subscribe_to_addresses(self.wallet.addresses(True))
while self.is_running():
# 1. create new addresses
new_addresses = self.wallet.synchronize()
# request missing addresses
if new_addresses:
self.subscribe_to_addresses(new_addresses)
# request missing transactions
for tx_hash, tx_height in missing_tx:
if (tx_hash, tx_height) not in requested_tx:
self.network.send([ ('blockchain.transaction.get',[tx_hash, tx_height]) ], lambda i,r: self.queue.put(r))
requested_tx.append( (tx_hash, tx_height) )
missing_tx = []
# detect if situation has changed
if self.network.is_up_to_date() and self.queue.empty():
if not self.wallet.is_up_to_date():
self.wallet.set_up_to_date(True)
self.was_updated = True
else:
if self.wallet.is_up_to_date():
self.wallet.set_up_to_date(False)
self.was_updated = True
if self.was_updated:
self.network.trigger_callback('updated')
self.was_updated = False
# 2. get a response
try:
r = self.queue.get(block=True, timeout=1)
except Queue.Empty:
continue
# see if it changed
#if interface != self.network.interface:
# break
if not r:
continue
# 3. handle response
method = r['method']
params = r['params']
result = r.get('result')
error = r.get('error')
if error:
print "error", r
continue
if method == 'blockchain.address.subscribe':
addr = params[0]
if self.wallet.get_status(self.wallet.get_history(addr)) != result:
if requested_histories.get(addr) is None:
self.network.send([('blockchain.address.get_history', [addr])], lambda i,r:self.queue.put(r))
requested_histories[addr] = result
elif method == 'blockchain.address.get_history':
addr = params[0]
print_error("receiving history", addr, result)
if result == ['*']:
assert requested_histories.pop(addr) == '*'
self.wallet.receive_history_callback(addr, result)
else:
hist = []
# check that txids are unique
txids = []
for item in result:
tx_hash = item['tx_hash']
if tx_hash not in txids:
txids.append(tx_hash)
hist.append( (tx_hash, item['height']) )
if len(hist) != len(result):
raise Exception("error: server sent history with non-unique txid", result)
# check that the status corresponds to what was announced
rs = requested_histories.pop(addr)
if self.wallet.get_status(hist) != rs:
raise Exception("error: status mismatch: %s"%addr)
# store received history
self.wallet.receive_history_callback(addr, hist)
# request transactions that we don't have
for tx_hash, tx_height in hist:
if self.wallet.transactions.get(tx_hash) is None:
if (tx_hash, tx_height) not in requested_tx and (tx_hash, tx_height) not in missing_tx:
missing_tx.append( (tx_hash, tx_height) )
elif method == 'blockchain.transaction.get':
tx_hash = params[0]
tx_height = params[1]
assert tx_hash == bitcoin.hash_encode(bitcoin.Hash(result.decode('hex')))
tx = Transaction(result)
self.wallet.receive_tx_callback(tx_hash, tx, tx_height)
self.was_updated = True
requested_tx.remove( (tx_hash, tx_height) )
print_error("received tx:", tx_hash, len(tx.raw))
else:
print_error("Error: Unknown message:" + method + ", " + repr(params) + ", " + repr(result) )
if self.was_updated and not requested_tx:
self.network.trigger_callback('updated')
# Updated gets called too many times from other places as well; if we use that signal we get the notification three times
self.network.trigger_callback("new_transaction")
self.was_updated = False