test/functional/txn_clone.py

   1 #!/usr/bin/env python3
   2 # Copyright (c) 2014-2016 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 are cloned transactions with malleated scriptsigs."""
   6
   7 from test_framework.test_framework import BitcoinTestFramework
   8 from test_framework.util import *
   9
  10 class TxnMallTest(BitcoinTestFramework):
  11     def add_options(self, parser):
  12         parser.add_option("--mineblock", dest="mine_block", default=False, action="store_true",
  13                           help="Test double-spend of 1-confirmed transaction")
  14
  15     def setup_network(self):
  16         # Start with split network:
  17         super(TxnMallTest, self).setup_network()
  18         disconnect_nodes(self.nodes[1], 2)
  19         disconnect_nodes(self.nodes[2], 1)
  20
  21     def run_test(self):
  22         # All nodes should start with 1,250 BTC:
  23         starting_balance = 1250
  24         for i in range(4):
  25             assert_equal(self.nodes[i].getbalance(), starting_balance)
  26             self.nodes[i].getnewaddress("")  # bug workaround, coins generated assigned to first getnewaddress!
  27
  28         # Assign coins to foo and bar accounts:
  29         self.nodes[0].settxfee(.001)
  30
  31         node0_address_foo = self.nodes[0].getnewaddress("foo")
  32         fund_foo_txid = self.nodes[0].sendfrom("", node0_address_foo, 1219)
  33         fund_foo_tx = self.nodes[0].gettransaction(fund_foo_txid)
  34
  35         node0_address_bar = self.nodes[0].getnewaddress("bar")
  36         fund_bar_txid = self.nodes[0].sendfrom("", node0_address_bar, 29)
  37         fund_bar_tx = self.nodes[0].gettransaction(fund_bar_txid)
  38
  39         assert_equal(self.nodes[0].getbalance(""),
  40                      starting_balance - 1219 - 29 + fund_foo_tx["fee"] + fund_bar_tx["fee"])
  41
  42         # Coins are sent to node1_address
  43         node1_address = self.nodes[1].getnewaddress("from0")
  44
  45         # Send tx1, and another transaction tx2 that won't be cloned
  46         txid1 = self.nodes[0].sendfrom("foo", node1_address, 40, 0)
  47         txid2 = self.nodes[0].sendfrom("bar", node1_address, 20, 0)
  48
  49         # Construct a clone of tx1, to be malleated
  50         rawtx1 = self.nodes[0].getrawtransaction(txid1,1)
  51         clone_inputs = [{"txid":rawtx1["vin"][0]["txid"],"vout":rawtx1["vin"][0]["vout"]}]
  52         clone_outputs = {rawtx1["vout"][0]["scriptPubKey"]["addresses"][0]:rawtx1["vout"][0]["value"],
  53                          rawtx1["vout"][1]["scriptPubKey"]["addresses"][0]:rawtx1["vout"][1]["value"]}
  54         clone_locktime = rawtx1["locktime"]
  55         clone_raw = self.nodes[0].createrawtransaction(clone_inputs, clone_outputs, clone_locktime)
  56
  57         # createrawtransaction randomizes the order of its outputs, so swap them if necessary.
  58         # output 0 is at version+#inputs+input+sigstub+sequence+#outputs
  59         # 40 BTC serialized is 00286bee00000000
  60         pos0 = 2*(4+1+36+1+4+1)
  61         hex40 = "00286bee00000000"
  62         output_len = 16 + 2 + 2 * int("0x" + clone_raw[pos0 + 16 : pos0 + 16 + 2], 0)
  63         if (rawtx1["vout"][0]["value"] == 40 and clone_raw[pos0 : pos0 + 16] != hex40 or
  64             rawtx1["vout"][0]["value"] != 40 and clone_raw[pos0 : pos0 + 16] == hex40):
  65             output0 = clone_raw[pos0 : pos0 + output_len]
  66             output1 = clone_raw[pos0 + output_len : pos0 + 2 * output_len]
  67             clone_raw = clone_raw[:pos0] + output1 + output0 + clone_raw[pos0 + 2 * output_len:]
  68
  69         # Use a different signature hash type to sign.  This creates an equivalent but malleated clone.
  70         # Don't send the clone anywhere yet
  71         tx1_clone = self.nodes[0].signrawtransaction(clone_raw, None, None, "ALL|ANYONECANPAY")
  72         assert_equal(tx1_clone["complete"], True)
  73
  74         # Have node0 mine a block, if requested:
  75         if (self.options.mine_block):
  76             self.nodes[0].generate(1)
  77             sync_blocks(self.nodes[0:2])
  78
  79         tx1 = self.nodes[0].gettransaction(txid1)
  80         tx2 = self.nodes[0].gettransaction(txid2)
  81
  82         # Node0's balance should be starting balance, plus 50BTC for another
  83         # matured block, minus tx1 and tx2 amounts, and minus transaction fees:
  84         expected = starting_balance + fund_foo_tx["fee"] + fund_bar_tx["fee"]
  85         if self.options.mine_block: expected += 50
  86         expected += tx1["amount"] + tx1["fee"]
  87         expected += tx2["amount"] + tx2["fee"]
  88         assert_equal(self.nodes[0].getbalance(), expected)
  89
  90         # foo and bar accounts should be debited:
  91         assert_equal(self.nodes[0].getbalance("foo", 0), 1219 + tx1["amount"] + tx1["fee"])
  92         assert_equal(self.nodes[0].getbalance("bar", 0), 29 + tx2["amount"] + tx2["fee"])
  93
  94         if self.options.mine_block:
  95             assert_equal(tx1["confirmations"], 1)
  96             assert_equal(tx2["confirmations"], 1)
  97             # Node1's "from0" balance should be both transaction amounts:
  98             assert_equal(self.nodes[1].getbalance("from0"), -(tx1["amount"] + tx2["amount"]))
  99         else:
 100             assert_equal(tx1["confirmations"], 0)
 101             assert_equal(tx2["confirmations"], 0)
 102
 103         # Send clone and its parent to miner
 104         self.nodes[2].sendrawtransaction(fund_foo_tx["hex"])
 105         txid1_clone = self.nodes[2].sendrawtransaction(tx1_clone["hex"])
 106         # ... mine a block...
 107         self.nodes[2].generate(1)
 108
 109         # Reconnect the split network, and sync chain:
 110         connect_nodes(self.nodes[1], 2)
 111         self.nodes[2].sendrawtransaction(fund_bar_tx["hex"])
 112         self.nodes[2].sendrawtransaction(tx2["hex"])
 113         self.nodes[2].generate(1)  # Mine another block to make sure we sync
 114         sync_blocks(self.nodes)
 115
 116         # Re-fetch transaction info:
 117         tx1 = self.nodes[0].gettransaction(txid1)
 118         tx1_clone = self.nodes[0].gettransaction(txid1_clone)
 119         tx2 = self.nodes[0].gettransaction(txid2)
 120
 121         # Verify expected confirmations
 122         assert_equal(tx1["confirmations"], -2)
 123         assert_equal(tx1_clone["confirmations"], 2)
 124         assert_equal(tx2["confirmations"], 1)
 125
 126         # Check node0's total balance; should be same as before the clone, + 100 BTC for 2 matured,
 127         # less possible orphaned matured subsidy
 128         expected += 100
 129         if (self.options.mine_block):
 130             expected -= 50
 131         assert_equal(self.nodes[0].getbalance(), expected)
 132         assert_equal(self.nodes[0].getbalance("*", 0), expected)
 133
 134         # Check node0's individual account balances.
 135         # "foo" should have been debited by the equivalent clone of tx1
 136         assert_equal(self.nodes[0].getbalance("foo"), 1219 + tx1["amount"] + tx1["fee"])
 137         # "bar" should have been debited by (possibly unconfirmed) tx2
 138         assert_equal(self.nodes[0].getbalance("bar", 0), 29 + tx2["amount"] + tx2["fee"])
 139         # "" should have starting balance, less funding txes, plus subsidies
 140         assert_equal(self.nodes[0].getbalance("", 0), starting_balance
 141                                                                 - 1219
 142                                                                 + fund_foo_tx["fee"]
 143                                                                 -   29
 144                                                                 + fund_bar_tx["fee"]
 145                                                                 +  100)
 146
 147         # Node1's "from0" account balance
 148         assert_equal(self.nodes[1].getbalance("from0", 0), -(tx1["amount"] + tx2["amount"]))
 149
 150 if __name__ == '__main__':
 151     TxnMallTest().main()
 152