git / moonbite-core / test/functional/wallet_txn_doublespend.py · raw

#!/usr/bin/env python3# Copyright (c) 2014-2019 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 accounts properly when there is a double-spend conflict."""from decimal import Decimalfrom test_framework.test_framework import BitcoinTestFrameworkfrom test_framework.util import (    assert_equal,    find_output,)class TxnMallTest(BitcoinTestFramework):    def set_test_params(self):        self.num_nodes = 4        self.supports_cli = False    def skip_test_if_missing_module(self):        self.skip_if_no_wallet()    def add_options(self, parser):        parser.add_argument("--mineblock", dest="mine_block", default=False, action="store_true",                            help="Test double-spend of 1-confirmed transaction")    def setup_network(self):        # Start with split network:        super().setup_network()        self.disconnect_nodes(1, 2)    def run_test(self):        # All nodes should start with 1,250 BTC:        starting_balance = 1250        # All nodes should be out of IBD.        # If the nodes are not all out of IBD, that can interfere with        # blockchain sync later in the test when nodes are connected, due to        # timing issues.        for n in self.nodes:            assert n.getblockchaininfo()["initialblockdownload"] == False        for i in range(4):            assert_equal(self.nodes[i].getbalance(), starting_balance)            self.nodes[i].getnewaddress("")  # bug workaround, coins generated assigned to first getnewaddress!        # Assign coins to foo and bar addresses:        node0_address_foo = self.nodes[0].getnewaddress()        fund_foo_txid = self.nodes[0].sendtoaddress(node0_address_foo, 1219)        fund_foo_tx = self.nodes[0].gettransaction(fund_foo_txid)        node0_address_bar = self.nodes[0].getnewaddress()        fund_bar_txid = self.nodes[0].sendtoaddress(node0_address_bar, 29)        fund_bar_tx = self.nodes[0].gettransaction(fund_bar_txid)        assert_equal(self.nodes[0].getbalance(),                     starting_balance + fund_foo_tx["fee"] + fund_bar_tx["fee"])        # Coins are sent to node1_address        node1_address = self.nodes[1].getnewaddress()        # First: use raw transaction API to send 1240 BTC to node1_address,        # but don't broadcast:        doublespend_fee = Decimal('-.02')        rawtx_input_0 = {}        rawtx_input_0["txid"] = fund_foo_txid        rawtx_input_0["vout"] = find_output(self.nodes[0], fund_foo_txid, 1219)        rawtx_input_1 = {}        rawtx_input_1["txid"] = fund_bar_txid        rawtx_input_1["vout"] = find_output(self.nodes[0], fund_bar_txid, 29)        inputs = [rawtx_input_0, rawtx_input_1]        change_address = self.nodes[0].getnewaddress()        outputs = {}        outputs[node1_address] = 1240        outputs[change_address] = 1248 - 1240 + doublespend_fee        rawtx = self.nodes[0].createrawtransaction(inputs, outputs)        doublespend = self.nodes[0].signrawtransactionwithwallet(rawtx)        assert_equal(doublespend["complete"], True)        # Create two spends using 1 50 BTC coin each        txid1 = self.nodes[0].sendtoaddress(node1_address, 40)        txid2 = self.nodes[0].sendtoaddress(node1_address, 20)        # Have node0 mine a block:        if (self.options.mine_block):            self.nodes[0].generate(1)            self.sync_blocks(self.nodes[0:2])        tx1 = self.nodes[0].gettransaction(txid1)        tx2 = self.nodes[0].gettransaction(txid2)        # Node0's balance should be starting balance, plus 50BTC for another        # matured block, minus 40, minus 20, and minus transaction fees:        expected = starting_balance + fund_foo_tx["fee"] + fund_bar_tx["fee"]        if self.options.mine_block:            expected += 50        expected += tx1["amount"] + tx1["fee"]        expected += tx2["amount"] + tx2["fee"]        assert_equal(self.nodes[0].getbalance(), expected)        if self.options.mine_block:            assert_equal(tx1["confirmations"], 1)            assert_equal(tx2["confirmations"], 1)            # Node1's balance should be both transaction amounts:            assert_equal(self.nodes[1].getbalance(), starting_balance - tx1["amount"] - tx2["amount"])        else:            assert_equal(tx1["confirmations"], 0)            assert_equal(tx2["confirmations"], 0)        # Now give doublespend and its parents to miner:        self.nodes[2].sendrawtransaction(fund_foo_tx["hex"])        self.nodes[2].sendrawtransaction(fund_bar_tx["hex"])        doublespend_txid = self.nodes[2].sendrawtransaction(doublespend["hex"])        # ... mine a block...        self.nodes[2].generate(1)        # Reconnect the split network, and sync chain:        self.connect_nodes(1, 2)        self.nodes[2].generate(1)  # Mine another block to make sure we sync        self.sync_blocks()        assert_equal(self.nodes[0].gettransaction(doublespend_txid)["confirmations"], 2)        # Re-fetch transaction info:        tx1 = self.nodes[0].gettransaction(txid1)        tx2 = self.nodes[0].gettransaction(txid2)        # Both transactions should be conflicted        assert_equal(tx1["confirmations"], -2)        assert_equal(tx2["confirmations"], -2)        # Node0's total balance should be starting balance, plus 100BTC for        # two more matured blocks, minus 1240 for the double-spend, plus fees (which are        # negative):        expected = starting_balance + 100 - 1240 + fund_foo_tx["fee"] + fund_bar_tx["fee"] + doublespend_fee        assert_equal(self.nodes[0].getbalance(), expected)        # Node1's balance should be its initial balance (1250 for 25 block rewards) plus the doublespend:        assert_equal(self.nodes[1].getbalance(), 1250 + 1240)if __name__ == '__main__':    TxnMallTest().main()