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#!/usr/bin/env python3
# Copyright (c) 2014-2016 The Bitcoin Core developers
# Distributed under the MIT software license, see the accompanying
# file COPYING or http://www.opensource.org/licenses/mit-license.php.
"""Test the wallet backup features.
Test case is:
4 nodes. 1 2 and 3 send transactions between each other,
fourth node is a miner.
1 2 3 each mine a block to start, then
Miner creates 100 blocks so 1 2 3 each have 50 mature
coins to spend.
Then 5 iterations of 1/2/3 sending coins amongst
themselves to get transactions in the wallets,
and the miner mining one block.
Wallets are backed up using dumpwallet/backupwallet.
Then 5 more iterations of transactions and mining a block.
Miner then generates 101 more blocks, so any
transaction fees paid mature.
Sanity check:
Sum(1,2,3,4 balances) == 114*50
1/2/3 are shutdown, and their wallets erased.
Then restore using wallet.dat backup. And
confirm 1/2/3/4 balances are same as before.
Shutdown again, restore using importwallet,
and confirm again balances are correct.
"""
from test_framework.test_framework import BitcoinTestFramework
from test_framework.util import *
from random import randint
class WalletBackupTest(BitcoinTestFramework):
def __init__(self):
super().__init__()
self.setup_clean_chain = True
self.num_nodes = 4
# nodes 1, 2,3 are spenders, let's give them a keypool=100
self.extra_args = [["-keypool=100"], ["-keypool=100"], ["-keypool=100"], []]
def setup_network(self, split=False):
self.setup_nodes()
connect_nodes(self.nodes[0], 3)
connect_nodes(self.nodes[1], 3)
connect_nodes(self.nodes[2], 3)
connect_nodes(self.nodes[2], 0)
self.sync_all()
def one_send(self, from_node, to_address):
if (randint(1,2) == 1):
amount = Decimal(randint(1,10)) / Decimal(10)
self.nodes[from_node].sendtoaddress(to_address, amount)
def do_one_round(self):
a0 = self.nodes[0].getnewaddress()
a1 = self.nodes[1].getnewaddress()
a2 = self.nodes[2].getnewaddress()
self.one_send(0, a1)
self.one_send(0, a2)
self.one_send(1, a0)
self.one_send(1, a2)
self.one_send(2, a0)
self.one_send(2, a1)
# Have the miner (node3) mine a block.
# Must sync mempools before mining.
sync_mempools(self.nodes)
self.nodes[3].generate(1)
sync_blocks(self.nodes)
# As above, this mirrors the original bash test.
def start_three(self):
self.nodes[0] = start_node(0, self.options.tmpdir)
self.nodes[1] = start_node(1, self.options.tmpdir)
self.nodes[2] = start_node(2, self.options.tmpdir)
connect_nodes(self.nodes[0], 3)
connect_nodes(self.nodes[1], 3)
connect_nodes(self.nodes[2], 3)
connect_nodes(self.nodes[2], 0)
def stop_three(self):
stop_node(self.nodes[0], 0)
stop_node(self.nodes[1], 1)
stop_node(self.nodes[2], 2)
def erase_three(self):
os.remove(self.options.tmpdir + "/node0/regtest/wallet.dat")
os.remove(self.options.tmpdir + "/node1/regtest/wallet.dat")
os.remove(self.options.tmpdir + "/node2/regtest/wallet.dat")
def run_test(self):
self.log.info("Generating initial blockchain")
self.nodes[0].generate(1)
sync_blocks(self.nodes)
self.nodes[1].generate(1)
sync_blocks(self.nodes)
self.nodes[2].generate(1)
sync_blocks(self.nodes)
self.nodes[3].generate(100)
sync_blocks(self.nodes)
assert_equal(self.nodes[0].getbalance(), 50)
assert_equal(self.nodes[1].getbalance(), 50)
assert_equal(self.nodes[2].getbalance(), 50)
assert_equal(self.nodes[3].getbalance(), 0)
self.log.info("Creating transactions")
# Five rounds of sending each other transactions.
for i in range(5):
self.do_one_round()
self.log.info("Backing up")
tmpdir = self.options.tmpdir
self.nodes[0].backupwallet(tmpdir + "/node0/wallet.bak")
self.nodes[0].dumpwallet(tmpdir + "/node0/wallet.dump")
self.nodes[1].backupwallet(tmpdir + "/node1/wallet.bak")
self.nodes[1].dumpwallet(tmpdir + "/node1/wallet.dump")
self.nodes[2].backupwallet(tmpdir + "/node2/wallet.bak")
self.nodes[2].dumpwallet(tmpdir + "/node2/wallet.dump")
self.log.info("More transactions")
for i in range(5):
self.do_one_round()
# Generate 101 more blocks, so any fees paid mature
self.nodes[3].generate(101)
self.sync_all()
balance0 = self.nodes[0].getbalance()
balance1 = self.nodes[1].getbalance()
balance2 = self.nodes[2].getbalance()
balance3 = self.nodes[3].getbalance()
total = balance0 + balance1 + balance2 + balance3
# At this point, there are 214 blocks (103 for setup, then 10 rounds, then 101.)
# 114 are mature, so the sum of all wallets should be 114 * 50 = 5700.
assert_equal(total, 5700)
##
# Test restoring spender wallets from backups
##
self.log.info("Restoring using wallet.dat")
self.stop_three()
self.erase_three()
# Start node2 with no chain
shutil.rmtree(self.options.tmpdir + "/node2/regtest/blocks")
shutil.rmtree(self.options.tmpdir + "/node2/regtest/chainstate")
# Restore wallets from backup
shutil.copyfile(tmpdir + "/node0/wallet.bak", tmpdir + "/node0/regtest/wallet.dat")
shutil.copyfile(tmpdir + "/node1/wallet.bak", tmpdir + "/node1/regtest/wallet.dat")
shutil.copyfile(tmpdir + "/node2/wallet.bak", tmpdir + "/node2/regtest/wallet.dat")
self.log.info("Re-starting nodes")
self.start_three()
sync_blocks(self.nodes)
assert_equal(self.nodes[0].getbalance(), balance0)
assert_equal(self.nodes[1].getbalance(), balance1)
assert_equal(self.nodes[2].getbalance(), balance2)
self.log.info("Restoring using dumped wallet")
self.stop_three()
self.erase_three()
#start node2 with no chain
shutil.rmtree(self.options.tmpdir + "/node2/regtest/blocks")
shutil.rmtree(self.options.tmpdir + "/node2/regtest/chainstate")
self.start_three()
assert_equal(self.nodes[0].getbalance(), 0)
assert_equal(self.nodes[1].getbalance(), 0)
assert_equal(self.nodes[2].getbalance(), 0)
self.nodes[0].importwallet(tmpdir + "/node0/wallet.dump")
self.nodes[1].importwallet(tmpdir + "/node1/wallet.dump")
self.nodes[2].importwallet(tmpdir + "/node2/wallet.dump")
sync_blocks(self.nodes)
assert_equal(self.nodes[0].getbalance(), balance0)
assert_equal(self.nodes[1].getbalance(), balance1)
assert_equal(self.nodes[2].getbalance(), balance2)
if __name__ == '__main__':
WalletBackupTest().main()
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