1#!/usr/bin/env python3 2# Copyright (c) 2014-2018 The Bitcoin Core developers 3# Distributed under the MIT software license, see the accompanying 4# file COPYING or http://www.opensource.org/licenses/mit-license.php. 5"""Test the wallet accounts properly when there is a double-spend conflict.""" 6from decimal import Decimal 7 8from test_framework.test_framework import BitcoinTestFramework 9from test_framework.util import ( 10 assert_equal, 11 connect_nodes, 12 disconnect_nodes, 13 find_output, 14 sync_blocks, 15) 16 17class TxnMallTest(BitcoinTestFramework): 18 def set_test_params(self): 19 self.num_nodes = 4 20 21 def skip_test_if_missing_module(self): 22 self.skip_if_no_wallet() 23 24 def add_options(self, parser): 25 parser.add_argument("--mineblock", dest="mine_block", default=False, action="store_true", 26 help="Test double-spend of 1-confirmed transaction") 27 28 def setup_network(self): 29 # Start with split network: 30 super().setup_network() 31 disconnect_nodes(self.nodes[1], 2) 32 disconnect_nodes(self.nodes[2], 1) 33 34 def run_test(self): 35 # All nodes should start with 1,250 BTC: 36 starting_balance = 1250 37 38 # All nodes should be out of IBD. 39 # If the nodes are not all out of IBD, that can interfere with 40 # blockchain sync later in the test when nodes are connected, due to 41 # timing issues. 42 for n in self.nodes: 43 assert n.getblockchaininfo()["initialblockdownload"] == False 44 45 for i in range(4): 46 assert_equal(self.nodes[i].getbalance(), starting_balance) 47 self.nodes[i].getnewaddress("") # bug workaround, coins generated assigned to first getnewaddress! 48 49 # Assign coins to foo and bar addresses: 50 node0_address_foo = self.nodes[0].getnewaddress() 51 fund_foo_txid = self.nodes[0].sendtoaddress(node0_address_foo, 1219) 52 fund_foo_tx = self.nodes[0].gettransaction(fund_foo_txid) 53 54 node0_address_bar = self.nodes[0].getnewaddress() 55 fund_bar_txid = self.nodes[0].sendtoaddress(node0_address_bar, 29) 56 fund_bar_tx = self.nodes[0].gettransaction(fund_bar_txid) 57 58 assert_equal(self.nodes[0].getbalance(), 59 starting_balance + fund_foo_tx["fee"] + fund_bar_tx["fee"]) 60 61 # Coins are sent to node1_address 62 node1_address = self.nodes[1].getnewaddress() 63 64 # First: use raw transaction API to send 1240 BTC to node1_address, 65 # but don't broadcast: 66 doublespend_fee = Decimal('-.02') 67 rawtx_input_0 = {} 68 rawtx_input_0["txid"] = fund_foo_txid 69 rawtx_input_0["vout"] = find_output(self.nodes[0], fund_foo_txid, 1219) 70 rawtx_input_1 = {} 71 rawtx_input_1["txid"] = fund_bar_txid 72 rawtx_input_1["vout"] = find_output(self.nodes[0], fund_bar_txid, 29) 73 inputs = [rawtx_input_0, rawtx_input_1] 74 change_address = self.nodes[0].getnewaddress() 75 outputs = {} 76 outputs[node1_address] = 1240 77 outputs[change_address] = 1248 - 1240 + doublespend_fee 78 rawtx = self.nodes[0].createrawtransaction(inputs, outputs) 79 doublespend = self.nodes[0].signrawtransactionwithwallet(rawtx) 80 assert_equal(doublespend["complete"], True) 81 82 # Create two spends using 1 50 BTC coin each 83 txid1 = self.nodes[0].sendtoaddress(node1_address, 40) 84 txid2 = self.nodes[0].sendtoaddress(node1_address, 20) 85 86 # Have node0 mine a block: 87 if (self.options.mine_block): 88 self.nodes[0].generate(1) 89 sync_blocks(self.nodes[0:2]) 90 91 tx1 = self.nodes[0].gettransaction(txid1) 92 tx2 = self.nodes[0].gettransaction(txid2) 93 94 # Node0's balance should be starting balance, plus 50BTC for another 95 # matured block, minus 40, minus 20, and minus transaction fees: 96 expected = starting_balance + fund_foo_tx["fee"] + fund_bar_tx["fee"] 97 if self.options.mine_block: 98 expected += 50 99 expected += tx1["amount"] + tx1["fee"] 100 expected += tx2["amount"] + tx2["fee"] 101 assert_equal(self.nodes[0].getbalance(), expected) 102 103 if self.options.mine_block: 104 assert_equal(tx1["confirmations"], 1) 105 assert_equal(tx2["confirmations"], 1) 106 # Node1's balance should be both transaction amounts: 107 assert_equal(self.nodes[1].getbalance(), starting_balance - tx1["amount"] - tx2["amount"]) 108 else: 109 assert_equal(tx1["confirmations"], 0) 110 assert_equal(tx2["confirmations"], 0) 111 112 # Now give doublespend and its parents to miner: 113 self.nodes[2].sendrawtransaction(fund_foo_tx["hex"]) 114 self.nodes[2].sendrawtransaction(fund_bar_tx["hex"]) 115 doublespend_txid = self.nodes[2].sendrawtransaction(doublespend["hex"]) 116 # ... mine a block... 117 self.nodes[2].generate(1) 118 119 # Reconnect the split network, and sync chain: 120 connect_nodes(self.nodes[1], 2) 121 self.nodes[2].generate(1) # Mine another block to make sure we sync 122 sync_blocks(self.nodes) 123 assert_equal(self.nodes[0].gettransaction(doublespend_txid)["confirmations"], 2) 124 125 # Re-fetch transaction info: 126 tx1 = self.nodes[0].gettransaction(txid1) 127 tx2 = self.nodes[0].gettransaction(txid2) 128 129 # Both transactions should be conflicted 130 assert_equal(tx1["confirmations"], -2) 131 assert_equal(tx2["confirmations"], -2) 132 133 # Node0's total balance should be starting balance, plus 100BTC for 134 # two more matured blocks, minus 1240 for the double-spend, plus fees (which are 135 # negative): 136 expected = starting_balance + 100 - 1240 + fund_foo_tx["fee"] + fund_bar_tx["fee"] + doublespend_fee 137 assert_equal(self.nodes[0].getbalance(), expected) 138 139 # Node1's balance should be its initial balance (1250 for 25 block rewards) plus the doublespend: 140 assert_equal(self.nodes[1].getbalance(), 1250 + 1240) 141 142if __name__ == '__main__': 143 TxnMallTest().main() 144