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#!/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 malleable transactions
#
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].move("", "foo", 1220)
self.nodes[0].move("", "bar", 30)
assert_equal(self.nodes[0].getbalance(""), 0)
# Coins are sent to node1_address
node1_address = self.nodes[1].getnewaddress("from0")
# First: use raw transaction API to send 1210 BTC to node1_address,
# but don't broadcast:
(total_in, inputs) = gather_inputs(self.nodes[0], 1210)
change_address = self.nodes[0].getnewaddress("foo")
outputs = {}
outputs[change_address] = 40
outputs[node1_address] = 1210
rawtx = self.nodes[0].createrawtransaction(inputs, outputs)
doublespend = self.nodes[0].signrawtransaction(rawtx)
assert_equal(doublespend["complete"], True)
# Create two transaction from node[0] to node[1]; the
# second must spend change from the first because the first
# spends all mature inputs:
txid1 = self.nodes[0].sendfrom("foo", node1_address, 1210, 0)
txid2 = self.nodes[0].sendfrom("bar", node1_address, 20, 0)
# Have node0 mine a block:
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 1210, minus 20, and minus transaction fees:
expected = starting_balance
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"), 1220+tx1["amount"]+tx1["fee"])
assert_equal(self.nodes[0].getbalance("bar"), 30+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)
# Now give doublespend to miner:
mutated_txid = self.nodes[2].sendrawtransaction(doublespend["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)
tx2 = self.nodes[0].gettransaction(txid2)
# Both transactions should be conflicted
assert_equal(tx1["confirmations"], -1)
assert_equal(tx2["confirmations"], -1)
# Node0's total balance should be starting balance, plus 100BTC for
# two more matured blocks, minus 1210 for the double-spend:
expected = starting_balance + 100 - 1210
assert_equal(self.nodes[0].getbalance(), expected)
assert_equal(self.nodes[0].getbalance("*"), expected)
# foo account should be debited, but bar account should not:
assert_equal(self.nodes[0].getbalance("foo"), 1220-1210)
assert_equal(self.nodes[0].getbalance("bar"), 30)
# Node1's "from" account balance should be just the mutated send:
assert_equal(self.nodes[1].getbalance("from0"), 1210)
if __name__ == '__main__':
TxnMallTest().main()
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