#!/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. """ Exercise the wallet backup code. Ported from walletbackup.sh. 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 500 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*500 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 import logging logging.basicConfig(format='%(levelname)s: %(message)s', level=logging.INFO, stream=sys.stdout) class WalletBackupTest(BitcoinTestFramework): def __init__(self): super().__init__() self.setup_clean_chain = True self.num_nodes = 4 # This mirrors how the network was setup in the bash test def setup_network(self, split=False): # nodes 1, 2,3 are spenders, let's give them a keypool=100 extra_args = [["-keypool=100"], ["-keypool=100"], ["-keypool=100"], []] self.nodes = start_nodes(self.num_nodes, self.options.tmpdir, extra_args) 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.is_network_split=False 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) # 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): logging.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(), 500) assert_equal(self.nodes[1].getbalance(), 500) assert_equal(self.nodes[2].getbalance(), 500) assert_equal(self.nodes[3].getbalance(), 0) logging.info("Creating transactions") # Five rounds of sending each other transactions. for i in range(5): self.do_one_round() logging.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") logging.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 * 500 = 57000. assert_equal(total, 57000) ## # Test restoring spender wallets from backups ## logging.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") logging.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) logging.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()