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txn_clone.py 7.9KB

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  1. #!/usr/bin/env python2
  2. # Copyright (c) 2014-2015 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. #
  6. # Test proper accounting with an equivalent malleability clone
  7. #
  8. from test_framework.test_framework import BitcoinTestFramework
  9. from test_framework.authproxy import AuthServiceProxy, JSONRPCException
  10. from decimal import Decimal
  11. from test_framework.util import *
  12. import os
  13. import shutil
  14. class TxnMallTest(BitcoinTestFramework):
  15. def add_options(self, parser):
  16. parser.add_option("--mineblock", dest="mine_block", default=False, action="store_true",
  17. help="Test double-spend of 1-confirmed transaction")
  18. def setup_network(self):
  19. # Start with split network:
  20. return super(TxnMallTest, self).setup_network(True)
  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. # Assign coins to foo and bar accounts:
  28. self.nodes[0].settxfee(.001)
  29. node0_address_foo = self.nodes[0].getnewaddress("foo")
  30. fund_foo_txid = self.nodes[0].sendfrom("", node0_address_foo, 1219)
  31. fund_foo_tx = self.nodes[0].gettransaction(fund_foo_txid)
  32. node0_address_bar = self.nodes[0].getnewaddress("bar")
  33. fund_bar_txid = self.nodes[0].sendfrom("", node0_address_bar, 29)
  34. fund_bar_tx = self.nodes[0].gettransaction(fund_bar_txid)
  35. assert_equal(self.nodes[0].getbalance(""),
  36. starting_balance - 1219 - 29 + fund_foo_tx["fee"] + fund_bar_tx["fee"])
  37. # Coins are sent to node1_address
  38. node1_address = self.nodes[1].getnewaddress("from0")
  39. # Send tx1, and another transaction tx2 that won't be cloned
  40. txid1 = self.nodes[0].sendfrom("foo", node1_address, 40, 0)
  41. txid2 = self.nodes[0].sendfrom("bar", node1_address, 20, 0)
  42. # Construct a clone of tx1, to be malleated
  43. rawtx1 = self.nodes[0].getrawtransaction(txid1,1)
  44. clone_inputs = [{"txid":rawtx1["vin"][0]["txid"],"vout":rawtx1["vin"][0]["vout"]}]
  45. clone_outputs = {rawtx1["vout"][0]["scriptPubKey"]["addresses"][0]:rawtx1["vout"][0]["value"],
  46. rawtx1["vout"][1]["scriptPubKey"]["addresses"][0]:rawtx1["vout"][1]["value"]}
  47. clone_raw = self.nodes[0].createrawtransaction(clone_inputs, clone_outputs)
  48. # 3 hex manipulations on the clone are required
  49. # manipulation 1. sequence is at version+#inputs+input+sigstub
  50. posseq = 2*(4+1+36+1)
  51. seqbe = '%08x' % rawtx1["vin"][0]["sequence"]
  52. clone_raw = clone_raw[:posseq] + seqbe[6:8] + seqbe[4:6] + seqbe[2:4] + seqbe[0:2] + clone_raw[posseq + 8:]
  53. # manipulation 2. createrawtransaction randomizes the order of its outputs, so swap them if necessary.
  54. # output 0 is at version+#inputs+input+sigstub+sequence+#outputs
  55. # 40 BTC serialized is 00286bee00000000
  56. pos0 = 2*(4+1+36+1+4+1)
  57. hex40 = "00286bee00000000"
  58. output_len = 16 + 2 + 2 * int("0x" + clone_raw[pos0 + 16 : pos0 + 16 + 2], 0)
  59. if (rawtx1["vout"][0]["value"] == 40 and clone_raw[pos0 : pos0 + 16] != hex40 or
  60. rawtx1["vout"][0]["value"] != 40 and clone_raw[pos0 : pos0 + 16] == hex40):
  61. output0 = clone_raw[pos0 : pos0 + output_len]
  62. output1 = clone_raw[pos0 + output_len : pos0 + 2 * output_len]
  63. clone_raw = clone_raw[:pos0] + output1 + output0 + clone_raw[pos0 + 2 * output_len:]
  64. # manipulation 3. locktime is after outputs
  65. poslt = pos0 + 2 * output_len
  66. ltbe = '%08x' % rawtx1["locktime"]
  67. clone_raw = clone_raw[:poslt] + ltbe[6:8] + ltbe[4:6] + ltbe[2:4] + ltbe[0:2] + clone_raw[poslt + 8:]
  68. # Use a different signature hash type to sign. This creates an equivalent but malleated clone.
  69. # Don't send the clone anywhere yet
  70. tx1_clone = self.nodes[0].signrawtransaction(clone_raw, None, None, "ALL|ANYONECANPAY")
  71. assert_equal(tx1_clone["complete"], True)
  72. # Have node0 mine a block, if requested:
  73. if (self.options.mine_block):
  74. self.nodes[0].generate(1)
  75. sync_blocks(self.nodes[0:2])
  76. tx1 = self.nodes[0].gettransaction(txid1)
  77. tx2 = self.nodes[0].gettransaction(txid2)
  78. # Node0's balance should be starting balance, plus 50BTC for another
  79. # matured block, minus tx1 and tx2 amounts, and minus transaction fees:
  80. expected = starting_balance + fund_foo_tx["fee"] + fund_bar_tx["fee"]
  81. if self.options.mine_block: expected += 50
  82. expected += tx1["amount"] + tx1["fee"]
  83. expected += tx2["amount"] + tx2["fee"]
  84. assert_equal(self.nodes[0].getbalance(), expected)
  85. # foo and bar accounts should be debited:
  86. assert_equal(self.nodes[0].getbalance("foo", 0), 1219 + tx1["amount"] + tx1["fee"])
  87. assert_equal(self.nodes[0].getbalance("bar", 0), 29 + tx2["amount"] + tx2["fee"])
  88. if self.options.mine_block:
  89. assert_equal(tx1["confirmations"], 1)
  90. assert_equal(tx2["confirmations"], 1)
  91. # Node1's "from0" balance should be both transaction amounts:
  92. assert_equal(self.nodes[1].getbalance("from0"), -(tx1["amount"] + tx2["amount"]))
  93. else:
  94. assert_equal(tx1["confirmations"], 0)
  95. assert_equal(tx2["confirmations"], 0)
  96. # Send clone and its parent to miner
  97. self.nodes[2].sendrawtransaction(fund_foo_tx["hex"])
  98. txid1_clone = self.nodes[2].sendrawtransaction(tx1_clone["hex"])
  99. # ... mine a block...
  100. self.nodes[2].generate(1)
  101. # Reconnect the split network, and sync chain:
  102. connect_nodes(self.nodes[1], 2)
  103. self.nodes[2].sendrawtransaction(fund_bar_tx["hex"])
  104. self.nodes[2].sendrawtransaction(tx2["hex"])
  105. self.nodes[2].generate(1) # Mine another block to make sure we sync
  106. sync_blocks(self.nodes)
  107. # Re-fetch transaction info:
  108. tx1 = self.nodes[0].gettransaction(txid1)
  109. tx1_clone = self.nodes[0].gettransaction(txid1_clone)
  110. tx2 = self.nodes[0].gettransaction(txid2)
  111. # Verify expected confirmations
  112. assert_equal(tx1["confirmations"], -2)
  113. assert_equal(tx1_clone["confirmations"], 2)
  114. assert_equal(tx2["confirmations"], 1)
  115. # Check node0's total balance; should be same as before the clone, + 100 BTC for 2 matured,
  116. # less possible orphaned matured subsidy
  117. expected += 100
  118. if (self.options.mine_block):
  119. expected -= 50
  120. assert_equal(self.nodes[0].getbalance(), expected)
  121. assert_equal(self.nodes[0].getbalance("*", 0), expected)
  122. # Check node0's individual account balances.
  123. # "foo" should have been debited by the equivalent clone of tx1
  124. assert_equal(self.nodes[0].getbalance("foo"), 1219 + tx1["amount"] + tx1["fee"])
  125. # "bar" should have been debited by (possibly unconfirmed) tx2
  126. assert_equal(self.nodes[0].getbalance("bar", 0), 29 + tx2["amount"] + tx2["fee"])
  127. # "" should have starting balance, less funding txes, plus subsidies
  128. assert_equal(self.nodes[0].getbalance("", 0), starting_balance
  129. - 1219
  130. + fund_foo_tx["fee"]
  131. - 29
  132. + fund_bar_tx["fee"]
  133. + 100)
  134. # Node1's "from0" account balance
  135. assert_equal(self.nodes[1].getbalance("from0", 0), -(tx1["amount"] + tx2["amount"]))
  136. if __name__ == '__main__':
  137. TxnMallTest().main()