aboutsummaryrefslogtreecommitdiff
path: root/test/functional/wallet_txn_clone.py
blob: 3eb525a9bc9c0c7a05d46204f4e4feb234251360 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
#!/usr/bin/env python3
# Copyright (c) 2014-2020 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 are cloned transactions with malleated scriptsigs."""

from test_framework.test_framework import BitcoinTestFramework
from test_framework.util import (
    assert_equal,
)
from test_framework.messages import (
    COIN,
    tx_from_hex,
)


class TxnMallTest(BitcoinTestFramework):
    def set_test_params(self):
        self.num_nodes = 3
        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")
        parser.add_argument("--segwit", dest="segwit", default=False, action="store_true",
                            help="Test behaviour with SegWit txn (which should fail)")

    def setup_network(self):
        # Start with split network:
        super().setup_network()
        self.disconnect_nodes(1, 2)

    def run_test(self):
        if self.options.segwit:
            output_type = "p2sh-segwit"
        else:
            output_type = "legacy"

        # All nodes should start with 1,250 BTC:
        starting_balance = 1250
        for i in range(3):
            assert_equal(self.nodes[i].getbalance(), starting_balance)

        self.nodes[0].settxfee(.001)

        node0_address1 = self.nodes[0].getnewaddress(address_type=output_type)
        node0_txid1 = self.nodes[0].sendtoaddress(node0_address1, 1219)
        node0_tx1 = self.nodes[0].gettransaction(node0_txid1)

        node0_address2 = self.nodes[0].getnewaddress(address_type=output_type)
        node0_txid2 = self.nodes[0].sendtoaddress(node0_address2, 29)
        node0_tx2 = self.nodes[0].gettransaction(node0_txid2)

        assert_equal(self.nodes[0].getbalance(),
                     starting_balance + node0_tx1["fee"] + node0_tx2["fee"])

        # Coins are sent to node1_address
        node1_address = self.nodes[1].getnewaddress()

        # Send tx1, and another transaction tx2 that won't be cloned
        txid1 = self.nodes[0].sendtoaddress(node1_address, 40)
        txid2 = self.nodes[0].sendtoaddress(node1_address, 20)

        # Construct a clone of tx1, to be malleated
        rawtx1 = self.nodes[0].getrawtransaction(txid1, 1)
        clone_inputs = [{"txid": rawtx1["vin"][0]["txid"], "vout": rawtx1["vin"][0]["vout"], "sequence": rawtx1["vin"][0]["sequence"]}]
        clone_outputs = {rawtx1["vout"][0]["scriptPubKey"]["address"]: rawtx1["vout"][0]["value"],
                         rawtx1["vout"][1]["scriptPubKey"]["address"]: rawtx1["vout"][1]["value"]}
        clone_locktime = rawtx1["locktime"]
        clone_raw = self.nodes[0].createrawtransaction(clone_inputs, clone_outputs, clone_locktime)

        # createrawtransaction randomizes the order of its outputs, so swap them if necessary.
        clone_tx = tx_from_hex(clone_raw)
        if (rawtx1["vout"][0]["value"] == 40 and clone_tx.vout[0].nValue != 40*COIN or rawtx1["vout"][0]["value"] != 40 and clone_tx.vout[0].nValue == 40*COIN):
            (clone_tx.vout[0], clone_tx.vout[1]) = (clone_tx.vout[1], clone_tx.vout[0])

        # Use a different signature hash type to sign.  This creates an equivalent but malleated clone.
        # Don't send the clone anywhere yet
        tx1_clone = self.nodes[0].signrawtransactionwithwallet(clone_tx.serialize().hex(), None, "ALL|ANYONECANPAY")
        assert_equal(tx1_clone["complete"], True)

        # Have node0 mine a block, if requested:
        if (self.options.mine_block):
            self.generate(self.nodes[0], 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 tx1 and tx2 amounts, and minus transaction fees:
        expected = starting_balance + node0_tx1["fee"] + node0_tx2["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)
        else:
            assert_equal(tx1["confirmations"], 0)
            assert_equal(tx2["confirmations"], 0)

        # Send clone and its parent to miner
        self.nodes[2].sendrawtransaction(node0_tx1["hex"])
        txid1_clone = self.nodes[2].sendrawtransaction(tx1_clone["hex"])
        if self.options.segwit:
            assert_equal(txid1, txid1_clone)
            return

        # ... mine a block...
        self.generate(self.nodes[2], 1)

        # Reconnect the split network, and sync chain:
        self.connect_nodes(1, 2)
        self.nodes[2].sendrawtransaction(node0_tx2["hex"])
        self.nodes[2].sendrawtransaction(tx2["hex"])
        self.generate(self.nodes[2], 1)  # Mine another block to make sure we sync
        self.sync_blocks()

        # Re-fetch transaction info:
        tx1 = self.nodes[0].gettransaction(txid1)
        tx1_clone = self.nodes[0].gettransaction(txid1_clone)
        tx2 = self.nodes[0].gettransaction(txid2)

        # Verify expected confirmations
        assert_equal(tx1["confirmations"], -2)
        assert_equal(tx1_clone["confirmations"], 2)
        assert_equal(tx2["confirmations"], 1)

        # Check node0's total balance; should be same as before the clone, + 100 BTC for 2 matured,
        # less possible orphaned matured subsidy
        expected += 100
        if (self.options.mine_block):
            expected -= 50
        assert_equal(self.nodes[0].getbalance(), expected)


if __name__ == '__main__':
    TxnMallTest().main()