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151 lines
6.4 KiB
151 lines
6.4 KiB
#!/usr/bin/env python3
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# Copyright (c) 2014-2020 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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"""Test the wallet accounts properly when there is a double-spend conflict."""
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from decimal import Decimal
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from test_framework.test_framework import BitcoinTestFramework
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from test_framework.util import (
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assert_equal,
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find_output,
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find_vout_for_address
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)
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class TxnMallTest(BitcoinTestFramework):
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def set_test_params(self):
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self.num_nodes = 3
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self.supports_cli = False
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def skip_test_if_missing_module(self):
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self.skip_if_no_wallet()
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def add_options(self, parser):
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parser.add_argument("--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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super().setup_network()
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self.disconnect_nodes(1, 2)
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def spend_txid(self, txid, vout, outputs):
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inputs = [{"txid": txid, "vout": vout}]
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tx = self.nodes[0].createrawtransaction(inputs, outputs)
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tx = self.nodes[0].fundrawtransaction(tx)
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tx = self.nodes[0].signrawtransactionwithwallet(tx['hex'])
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return self.nodes[0].sendrawtransaction(tx['hex'])
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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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# All nodes should be out of IBD.
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# If the nodes are not all out of IBD, that can interfere with
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# blockchain sync later in the test when nodes are connected, due to
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# timing issues.
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for n in self.nodes:
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assert n.getblockchaininfo()["initialblockdownload"] == False
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for i in range(3):
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assert_equal(self.nodes[i].getbalance(), starting_balance)
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# Assign coins to foo and bar addresses:
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node0_address_foo = self.nodes[0].getnewaddress()
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fund_foo_txid = self.nodes[0].sendtoaddress(node0_address_foo, 1219)
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fund_foo_tx = self.nodes[0].gettransaction(fund_foo_txid)
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self.nodes[0].lockunspent(False, [{"txid":fund_foo_txid, "vout": find_vout_for_address(self.nodes[0], fund_foo_txid, node0_address_foo)}])
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node0_address_bar = self.nodes[0].getnewaddress()
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fund_bar_txid = self.nodes[0].sendtoaddress(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 + 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()
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# First: use raw transaction API to send 1240 BTC to node1_address,
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# but don't broadcast:
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doublespend_fee = Decimal('-.02')
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rawtx_input_0 = {}
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rawtx_input_0["txid"] = fund_foo_txid
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rawtx_input_0["vout"] = find_output(self.nodes[0], fund_foo_txid, 1219)
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rawtx_input_1 = {}
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rawtx_input_1["txid"] = fund_bar_txid
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rawtx_input_1["vout"] = find_output(self.nodes[0], fund_bar_txid, 29)
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inputs = [rawtx_input_0, rawtx_input_1]
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change_address = self.nodes[0].getnewaddress()
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outputs = {}
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outputs[node1_address] = 1240
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outputs[change_address] = 1248 - 1240 + doublespend_fee
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rawtx = self.nodes[0].createrawtransaction(inputs, outputs)
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doublespend = self.nodes[0].signrawtransactionwithwallet(rawtx)
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assert_equal(doublespend["complete"], True)
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# Create two spends using 1 50 BTC coin each
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txid1 = self.spend_txid(fund_foo_txid, find_vout_for_address(self.nodes[0], fund_foo_txid, node0_address_foo), {node1_address: 40})
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txid2 = self.spend_txid(fund_bar_txid, find_vout_for_address(self.nodes[0], fund_bar_txid, node0_address_bar), {node1_address: 20})
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# Have node0 mine a block:
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if (self.options.mine_block):
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self.generate(self.nodes[0], 1)
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self.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 40, minus 20, 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:
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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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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 balance should be both transaction amounts:
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assert_equal(self.nodes[1].getbalance(), starting_balance - 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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# Now give doublespend and its parents to miner:
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self.nodes[2].sendrawtransaction(fund_foo_tx["hex"])
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self.nodes[2].sendrawtransaction(fund_bar_tx["hex"])
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doublespend_txid = self.nodes[2].sendrawtransaction(doublespend["hex"])
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# ... mine a block...
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self.generate(self.nodes[2], 1)
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# Reconnect the split network, and sync chain:
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self.connect_nodes(1, 2)
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self.generate(self.nodes[2], 1) # Mine another block to make sure we sync
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self.sync_blocks()
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assert_equal(self.nodes[0].gettransaction(doublespend_txid)["confirmations"], 2)
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# Re-fetch transaction info:
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tx1 = self.nodes[0].gettransaction(txid1)
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tx2 = self.nodes[0].gettransaction(txid2)
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# Both transactions should be conflicted
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assert_equal(tx1["confirmations"], -2)
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assert_equal(tx2["confirmations"], -2)
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# Node0's total balance should be starting balance, plus 100BTC for
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# two more matured blocks, minus 1240 for the double-spend, plus fees (which are
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# negative):
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expected = starting_balance + 100 - 1240 + fund_foo_tx["fee"] + fund_bar_tx["fee"] + doublespend_fee
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assert_equal(self.nodes[0].getbalance(), expected)
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# Node1's balance should be its initial balance (1250 for 25 block rewards) plus the doublespend:
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assert_equal(self.nodes[1].getbalance(), 1250 + 1240)
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if __name__ == '__main__':
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TxnMallTest().main()
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