#!/usr/bin/env python3 # Copyright (c) 2014-2016 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 the wallet accounts properly when there is a double-spend conflict.""" from test_framework.test_framework import BitcoinTestFramework from test_framework.util import * class TxnMallTest(BitcoinTestFramework): def set_test_params(self): self.num_nodes = 4 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: super().setup_network() disconnect_nodes(self.nodes[1], 2) disconnect_nodes(self.nodes[2], 1) def run_test(self): # All nodes should start with 12,500 DASH: starting_balance = 12500 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: node0_address_foo = self.nodes[0].getnewaddress("foo") fund_foo_txid = self.nodes[0].sendfrom("", node0_address_foo, 12190) 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, 290) fund_bar_tx = self.nodes[0].gettransaction(fund_bar_txid) assert_equal(self.nodes[0].getbalance(""), starting_balance - 12190 - 290 + fund_foo_tx["fee"] + fund_bar_tx["fee"]) # Coins are sent to node1_address node1_address = self.nodes[1].getnewaddress("from0") # First: use raw transaction API to send 12400 DASH to node1_address, # but don't broadcast: doublespend_fee = Decimal('-.02') rawtx_input_0 = {} rawtx_input_0["txid"] = fund_foo_txid rawtx_input_0["vout"] = find_output(self.nodes[0], fund_foo_txid, 12190) rawtx_input_1 = {} rawtx_input_1["txid"] = fund_bar_txid rawtx_input_1["vout"] = find_output(self.nodes[0], fund_bar_txid, 290) inputs = [rawtx_input_0, rawtx_input_1] change_address = self.nodes[0].getnewaddress() outputs = {} outputs[node1_address] = 12400 outputs[change_address] = 12480 - 12400 + doublespend_fee rawtx = self.nodes[0].createrawtransaction(inputs, outputs) doublespend = self.nodes[0].signrawtransactionwithwallet(rawtx) assert_equal(doublespend["complete"], True) # Create two spends using 1 500 DASH coin each txid1 = self.nodes[0].sendfrom("foo", node1_address, 400, 0) txid2 = self.nodes[0].sendfrom("bar", node1_address, 200, 0) # Have node0 mine a block: if (self.options.mine_block): self.nodes[0].generate(1) self.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 500DASH for another # matured block, minus 400, minus 200, and minus transaction fees: expected = starting_balance + fund_foo_tx["fee"] + fund_bar_tx["fee"] if self.options.mine_block: expected += 500 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), 12190+tx1["amount"]+tx1["fee"]) assert_equal(self.nodes[0].getbalance("bar", 0), 290+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 and its parents to miner: self.nodes[2].sendrawtransaction(fund_foo_tx["hex"]) self.nodes[2].sendrawtransaction(fund_bar_tx["hex"]) doublespend_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 self.sync_blocks() assert_equal(self.nodes[0].gettransaction(doublespend_txid)["confirmations"], 2) # 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"], -2) assert_equal(tx2["confirmations"], -2) # Node0's total balance should be starting balance, plus 1000DASH for # two more matured blocks, minus 12400 for the double-spend, plus fees (which are # negative): expected = starting_balance + 1000 - 12400 + fund_foo_tx["fee"] + fund_bar_tx["fee"] + doublespend_fee assert_equal(self.nodes[0].getbalance(), expected) assert_equal(self.nodes[0].getbalance("*"), expected) # Final "" balance is starting_balance - amount moved to accounts - doublespend + subsidies + # fees (which are negative) assert_equal(self.nodes[0].getbalance("foo"), 12190) assert_equal(self.nodes[0].getbalance("bar"), 290) assert_equal(self.nodes[0].getbalance(""), starting_balance -12190 - 290 -12400 + 1000 + fund_foo_tx["fee"] + fund_bar_tx["fee"] + doublespend_fee) # Node1's "from0" account balance should be just the doublespend: assert_equal(self.nodes[1].getbalance("from0"), 12400) if __name__ == '__main__': TxnMallTest().main()