165 lines
7.8 KiB
Python
Executable file
165 lines
7.8 KiB
Python
Executable file
#!/usr/bin/env python2
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# Copyright (c) 2014-2015 The Bitcoin Core developers
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# Distributed under the MIT software license, see the accompanying
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# file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#
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# Test proper accounting with an equivalent malleability clone
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#
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from test_framework.test_framework import BitcoinTestFramework
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from test_framework.util import *
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class TxnMallTest(BitcoinTestFramework):
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def add_options(self, parser):
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parser.add_option("--mineblock", dest="mine_block", default=False, action="store_true",
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help="Test double-spend of 1-confirmed transaction")
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def setup_network(self):
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# Start with split network:
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return super(TxnMallTest, self).setup_network(True)
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def run_test(self):
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# All nodes should start with 1,250 BTC:
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starting_balance = 1250
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for i in range(4):
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assert_equal(self.nodes[i].getbalance(), starting_balance)
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self.nodes[i].getnewaddress("") # bug workaround, coins generated assigned to first getnewaddress!
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# Assign coins to foo and bar accounts:
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self.nodes[0].settxfee(.001)
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node0_address_foo = self.nodes[0].getnewaddress("foo")
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fund_foo_txid = self.nodes[0].sendfrom("", node0_address_foo, 1219)
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fund_foo_tx = self.nodes[0].gettransaction(fund_foo_txid)
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node0_address_bar = self.nodes[0].getnewaddress("bar")
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fund_bar_txid = self.nodes[0].sendfrom("", node0_address_bar, 29)
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fund_bar_tx = self.nodes[0].gettransaction(fund_bar_txid)
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assert_equal(self.nodes[0].getbalance(""),
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starting_balance - 1219 - 29 + fund_foo_tx["fee"] + fund_bar_tx["fee"])
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# Coins are sent to node1_address
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node1_address = self.nodes[1].getnewaddress("from0")
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# Send tx1, and another transaction tx2 that won't be cloned
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txid1 = self.nodes[0].sendfrom("foo", node1_address, 40, 0)
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txid2 = self.nodes[0].sendfrom("bar", node1_address, 20, 0)
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# Construct a clone of tx1, to be malleated
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rawtx1 = self.nodes[0].getrawtransaction(txid1,1)
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clone_inputs = [{"txid":rawtx1["vin"][0]["txid"],"vout":rawtx1["vin"][0]["vout"]}]
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clone_outputs = {rawtx1["vout"][0]["scriptPubKey"]["addresses"][0]:rawtx1["vout"][0]["value"],
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rawtx1["vout"][1]["scriptPubKey"]["addresses"][0]:rawtx1["vout"][1]["value"]}
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clone_raw = self.nodes[0].createrawtransaction(clone_inputs, clone_outputs)
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# 3 hex manipulations on the clone are required
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# manipulation 1. sequence is at version+#inputs+input+sigstub
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posseq = 2*(4+1+36+1)
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seqbe = '%08x' % rawtx1["vin"][0]["sequence"]
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clone_raw = clone_raw[:posseq] + seqbe[6:8] + seqbe[4:6] + seqbe[2:4] + seqbe[0:2] + clone_raw[posseq + 8:]
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# manipulation 2. createrawtransaction randomizes the order of its outputs, so swap them if necessary.
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# output 0 is at version+#inputs+input+sigstub+sequence+#outputs
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# 40 BTC serialized is 00286bee00000000
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pos0 = 2*(4+1+36+1+4+1)
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hex40 = "00286bee00000000"
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output_len = 16 + 2 + 2 * int("0x" + clone_raw[pos0 + 16 : pos0 + 16 + 2], 0)
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if (rawtx1["vout"][0]["value"] == 40 and clone_raw[pos0 : pos0 + 16] != hex40 or
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rawtx1["vout"][0]["value"] != 40 and clone_raw[pos0 : pos0 + 16] == hex40):
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output0 = clone_raw[pos0 : pos0 + output_len]
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output1 = clone_raw[pos0 + output_len : pos0 + 2 * output_len]
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clone_raw = clone_raw[:pos0] + output1 + output0 + clone_raw[pos0 + 2 * output_len:]
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# manipulation 3. locktime is after outputs
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poslt = pos0 + 2 * output_len
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ltbe = '%08x' % rawtx1["locktime"]
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clone_raw = clone_raw[:poslt] + ltbe[6:8] + ltbe[4:6] + ltbe[2:4] + ltbe[0:2] + clone_raw[poslt + 8:]
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# Use a different signature hash type to sign. This creates an equivalent but malleated clone.
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# Don't send the clone anywhere yet
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tx1_clone = self.nodes[0].signrawtransaction(clone_raw, None, None, "ALL|ANYONECANPAY")
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assert_equal(tx1_clone["complete"], True)
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# Have node0 mine a block, if requested:
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if (self.options.mine_block):
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self.nodes[0].generate(1)
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sync_blocks(self.nodes[0:2])
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tx1 = self.nodes[0].gettransaction(txid1)
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tx2 = self.nodes[0].gettransaction(txid2)
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# Node0's balance should be starting balance, plus 50BTC for another
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# matured block, minus tx1 and tx2 amounts, and minus transaction fees:
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expected = starting_balance + fund_foo_tx["fee"] + fund_bar_tx["fee"]
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if self.options.mine_block: expected += 50
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expected += tx1["amount"] + tx1["fee"]
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expected += tx2["amount"] + tx2["fee"]
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assert_equal(self.nodes[0].getbalance(), expected)
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# foo and bar accounts should be debited:
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assert_equal(self.nodes[0].getbalance("foo", 0), 1219 + tx1["amount"] + tx1["fee"])
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assert_equal(self.nodes[0].getbalance("bar", 0), 29 + tx2["amount"] + tx2["fee"])
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if self.options.mine_block:
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assert_equal(tx1["confirmations"], 1)
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assert_equal(tx2["confirmations"], 1)
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# Node1's "from0" balance should be both transaction amounts:
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assert_equal(self.nodes[1].getbalance("from0"), -(tx1["amount"] + tx2["amount"]))
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else:
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assert_equal(tx1["confirmations"], 0)
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assert_equal(tx2["confirmations"], 0)
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# Send clone and its parent to miner
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self.nodes[2].sendrawtransaction(fund_foo_tx["hex"])
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txid1_clone = self.nodes[2].sendrawtransaction(tx1_clone["hex"])
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# ... mine a block...
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self.nodes[2].generate(1)
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# Reconnect the split network, and sync chain:
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connect_nodes(self.nodes[1], 2)
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self.nodes[2].sendrawtransaction(fund_bar_tx["hex"])
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self.nodes[2].sendrawtransaction(tx2["hex"])
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self.nodes[2].generate(1) # Mine another block to make sure we sync
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sync_blocks(self.nodes)
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# Re-fetch transaction info:
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tx1 = self.nodes[0].gettransaction(txid1)
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tx1_clone = self.nodes[0].gettransaction(txid1_clone)
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tx2 = self.nodes[0].gettransaction(txid2)
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# Verify expected confirmations
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assert_equal(tx1["confirmations"], -2)
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assert_equal(tx1_clone["confirmations"], 2)
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assert_equal(tx2["confirmations"], 1)
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# Check node0's total balance; should be same as before the clone, + 100 BTC for 2 matured,
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# less possible orphaned matured subsidy
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expected += 100
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if (self.options.mine_block):
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expected -= 50
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assert_equal(self.nodes[0].getbalance(), expected)
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assert_equal(self.nodes[0].getbalance("*", 0), expected)
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# Check node0's individual account balances.
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# "foo" should have been debited by the equivalent clone of tx1
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assert_equal(self.nodes[0].getbalance("foo"), 1219 + tx1["amount"] + tx1["fee"])
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# "bar" should have been debited by (possibly unconfirmed) tx2
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assert_equal(self.nodes[0].getbalance("bar", 0), 29 + tx2["amount"] + tx2["fee"])
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# "" should have starting balance, less funding txes, plus subsidies
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assert_equal(self.nodes[0].getbalance("", 0), starting_balance
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- 1219
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+ fund_foo_tx["fee"]
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- 29
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+ fund_bar_tx["fee"]
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+ 100)
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# Node1's "from0" account balance
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assert_equal(self.nodes[1].getbalance("from0", 0), -(tx1["amount"] + tx2["amount"]))
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if __name__ == '__main__':
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TxnMallTest().main()
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