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txn_clone.py 7.4KB

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