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Diffstat (limited to 'qa/rpc-tests/txn_clone.py')
| -rwxr-xr-x | qa/rpc-tests/txn_clone.py | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/qa/rpc-tests/txn_clone.py b/qa/rpc-tests/txn_clone.py new file mode 100755 index 0000000000..19bc34e3f9 --- /dev/null +++ b/qa/rpc-tests/txn_clone.py @@ -0,0 +1,167 @@ +#!/usr/bin/env python2 +# Copyright (c) 2014 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 proper accounting with an equivalent malleability clone +# + +from test_framework import BitcoinTestFramework +from bitcoinrpc.authproxy import AuthServiceProxy, JSONRPCException +from decimal import Decimal +from util import * +import os +import shutil + +class TxnMallTest(BitcoinTestFramework): + + def add_options(self, parser): + parser.add_option("--mineblock", dest="mine_block", default=False, action="store_true", + help="Test double-spend of 1-confirmed transaction") + + def setup_network(self): + # Start with split network: + return super(TxnMallTest, self).setup_network(True) + + def run_test(self): + # All nodes should start with 1,250 BTC: + starting_balance = 1250 + for i in range(4): + assert_equal(self.nodes[i].getbalance(), starting_balance) + self.nodes[i].getnewaddress("") # bug workaround, coins generated assigned to first getnewaddress! + + # Assign coins to foo and bar accounts: + self.nodes[0].settxfee(.001) + + node0_address_foo = self.nodes[0].getnewaddress("foo") + fund_foo_txid = self.nodes[0].sendfrom("", node0_address_foo, 1219) + fund_foo_tx = self.nodes[0].gettransaction(fund_foo_txid) + + node0_address_bar = self.nodes[0].getnewaddress("bar") + fund_bar_txid = self.nodes[0].sendfrom("", node0_address_bar, 29) + fund_bar_tx = self.nodes[0].gettransaction(fund_bar_txid) + + assert_equal(self.nodes[0].getbalance(""), + starting_balance - 1219 - 29 + fund_foo_tx["fee"] + fund_bar_tx["fee"]) + + # Coins are sent to node1_address + node1_address = self.nodes[1].getnewaddress("from0") + + # Send tx1, and another transaction tx2 that won't be cloned + txid1 = self.nodes[0].sendfrom("foo", node1_address, 40, 0) + txid2 = self.nodes[0].sendfrom("bar", node1_address, 20, 0) + + # 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"]}] + clone_outputs = {rawtx1["vout"][0]["scriptPubKey"]["addresses"][0]:rawtx1["vout"][0]["value"], + rawtx1["vout"][1]["scriptPubKey"]["addresses"][0]:rawtx1["vout"][1]["value"]} + clone_raw = self.nodes[0].createrawtransaction(clone_inputs, clone_outputs) + + # 3 hex manipulations on the clone are required + + # manipulation 1. sequence is at version+#inputs+input+sigstub + posseq = 2*(4+1+36+1) + seqbe = '%08x' % rawtx1["vin"][0]["sequence"] + clone_raw = clone_raw[:posseq] + seqbe[6:8] + seqbe[4:6] + seqbe[2:4] + seqbe[0:2] + clone_raw[posseq + 8:] + + # manipulation 2. createrawtransaction randomizes the order of its outputs, so swap them if necessary. + # output 0 is at version+#inputs+input+sigstub+sequence+#outputs + # 40 BTC serialized is 00286bee00000000 + pos0 = 2*(4+1+36+1+4+1) + hex40 = "00286bee00000000" + output_len = 16 + 2 + 2 * int("0x" + clone_raw[pos0 + 16 : pos0 + 16 + 2], 0) + if (rawtx1["vout"][0]["value"] == 40 and clone_raw[pos0 : pos0 + 16] != hex40 or + rawtx1["vout"][0]["value"] != 40 and clone_raw[pos0 : pos0 + 16] == hex40): + output0 = clone_raw[pos0 : pos0 + output_len] + output1 = clone_raw[pos0 + output_len : pos0 + 2 * output_len] + clone_raw = clone_raw[:pos0] + output1 + output0 + clone_raw[pos0 + 2 * output_len:] + + # manipulation 3. locktime is after outputs + poslt = pos0 + 2 * output_len + ltbe = '%08x' % rawtx1["locktime"] + clone_raw = clone_raw[:poslt] + ltbe[6:8] + ltbe[4:6] + ltbe[2:4] + ltbe[0:2] + clone_raw[poslt + 8:] + + # 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].signrawtransaction(clone_raw, None, None, "ALL|ANYONECANPAY") + assert_equal(tx1_clone["complete"], True) + + # Have node0 mine a block, if requested: + if (self.options.mine_block): + self.nodes[0].generate(1) + 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 + fund_foo_tx["fee"] + fund_bar_tx["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) + + # foo and bar accounts should be debited: + assert_equal(self.nodes[0].getbalance("foo", 0), 1219 + tx1["amount"] + tx1["fee"]) + assert_equal(self.nodes[0].getbalance("bar", 0), 29 + tx2["amount"] + tx2["fee"]) + + if self.options.mine_block: + assert_equal(tx1["confirmations"], 1) + assert_equal(tx2["confirmations"], 1) + # Node1's "from0" balance should be both transaction amounts: + assert_equal(self.nodes[1].getbalance("from0"), -(tx1["amount"] + tx2["amount"])) + else: + assert_equal(tx1["confirmations"], 0) + assert_equal(tx2["confirmations"], 0) + + # Send clone and its parent to miner + self.nodes[2].sendrawtransaction(fund_foo_tx["hex"]) + txid1_clone = self.nodes[2].sendrawtransaction(tx1_clone["hex"]) + # ... mine a block... + self.nodes[2].generate(1) + + # Reconnect the split network, and sync chain: + connect_nodes(self.nodes[1], 2) + self.nodes[2].generate(1) # Mine another block to make sure we sync + sync_blocks(self.nodes) + + # 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"], -1) + assert_equal(tx1_clone["confirmations"], 2) + assert_equal(tx2["confirmations"], 0) + + # 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) + assert_equal(self.nodes[0].getbalance("*", 0), expected) + + # Check node0's individual account balances. + # "foo" should have been debited by the equivalent clone of tx1 + assert_equal(self.nodes[0].getbalance("foo"), 1219 + tx1["amount"] + tx1["fee"]) + # "bar" should have been debited by (possibly unconfirmed) tx2 + assert_equal(self.nodes[0].getbalance("bar", 0), 29 + tx2["amount"] + tx2["fee"]) + # "" should have starting balance, less funding txes, plus subsidies + assert_equal(self.nodes[0].getbalance("", 0), starting_balance + - 1219 + + fund_foo_tx["fee"] + - 29 + + fund_bar_tx["fee"] + + 100) + + # Node1's "from0" account balance + assert_equal(self.nodes[1].getbalance("from0", 0), -(tx1["amount"] + tx2["amount"])) + +if __name__ == '__main__': + TxnMallTest().main() + |