#!/usr/bin/env python3 # Copyright (c) 2014-2021 The DigiByte 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 decimal import Decimal from test_framework.test_framework import DigiByteTestFramework from test_framework.util import ( assert_equal, find_output, find_vout_for_address ) class TxnMallTest(DigiByteTestFramework): def set_test_params(self): self.num_nodes = 3 self.supports_cli = False def skip_test_if_missing_module(self): self.skip_if_no_wallet() def add_options(self, parser): parser.add_argument("--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() self.disconnect_nodes(1, 2) def spend_txid(self, txid, vout, outputs): inputs = [{"txid": txid, "vout": vout}] tx = self.nodes[0].createrawtransaction(inputs, outputs) tx = self.nodes[0].fundrawtransaction(tx) tx = self.nodes[0].signrawtransactionwithwallet(tx['hex']) return self.nodes[0].sendrawtransaction(tx['hex']) def run_test(self): # All nodes should start with 50 mature transactions, # having 72000 per (mature) coinbase transaction, each. # The fourth address from TestNode.PRIV_KEYS should have # 41 mature blocks, but only 8 immature blocks. # This is caused by the different COINBASE_MATURITY parameter in digibyte. self.generatetoaddress(self.nodes[0], 125, self.nodes[0].getnewaddress(), sync_fun=lambda: self.sync_blocks([self.nodes[0], self.nodes[1]])) self.connect_nodes(1, 2) self.sync_blocks() self.disconnect_nodes(1, 2) starting_balance = self.nodes[0].getbalance() # All nodes should be out of IBD. # If the nodes are not all out of IBD, that can interfere with # blockchain sync later in the test when nodes are connected, due to # timing issues. for n in self.nodes: assert n.getblockchaininfo()["initialblockdownload"] == False for i in range(1): balance = self.nodes[i].getbalance() print(f"Node {i} balance: {balance}") # Log statement assert_equal(balance, starting_balance) # Assign coins to foo and bar addresses: node0_address_foo = self.nodes[0].getnewaddress() fund_foo_txid = self.nodes[0].sendtoaddress(node0_address_foo, 1219) fund_foo_tx = self.nodes[0].gettransaction(fund_foo_txid) self.nodes[0].lockunspent(False, [{"txid":fund_foo_txid, "vout": find_vout_for_address(self.nodes[0], fund_foo_txid, node0_address_foo)}]) node0_address_bar = self.nodes[0].getnewaddress() fund_bar_txid = self.nodes[0].sendtoaddress(node0_address_bar, 29) fund_bar_tx = self.nodes[0].gettransaction(fund_bar_txid) assert_equal(self.nodes[0].getbalance(), starting_balance + fund_foo_tx["fee"] + fund_bar_tx["fee"]) # Coins are sent to node1_address node1_address = self.nodes[1].getnewaddress() # First: use raw transaction API to send 1240 BTC to node1_address, # but don't broadcast: doublespend_fee = Decimal('-.2') rawtx_input_0 = {} rawtx_input_0["txid"] = fund_foo_txid rawtx_input_0["vout"] = find_output(self.nodes[0], fund_foo_txid, 1219) rawtx_input_1 = {} rawtx_input_1["txid"] = fund_bar_txid rawtx_input_1["vout"] = find_output(self.nodes[0], fund_bar_txid, 29) inputs = [rawtx_input_0, rawtx_input_1] change_address = self.nodes[0].getnewaddress() outputs = {} outputs[node1_address] = 1240 outputs[change_address] = 1248 - 1240 + 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 50 DGB coin each txid1 = self.spend_txid(fund_foo_txid, find_vout_for_address(self.nodes[0], fund_foo_txid, node0_address_foo), {node1_address: 40}) txid2 = self.spend_txid(fund_bar_txid, find_vout_for_address(self.nodes[0], fund_bar_txid, node0_address_bar), {node1_address: 20}) # Have node0 mine a block: if (self.options.mine_block): self.generate(self.nodes[0], 1, sync_fun=lambda: 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 50BTC for another # matured block, minus 40, minus 20, and minus transaction fees: expected = starting_balance + fund_foo_tx["fee"] + fund_bar_tx["fee"] if self.options.mine_block: # In DigiByte, since COINBASE_MATURITY is only set to 8, # node0's txs are already matured. No emission will mature # even after calling a block. expected += 50 expected += tx1["amount"] + tx1["fee"] expected += tx2["amount"] + tx2["fee"] print(f"Node 0 balance: {self.nodes[0].getbalance()}") assert_equal(self.nodes[0].getbalance(), expected) if self.options.mine_block: assert_equal(tx1["confirmations"], 1) assert_equal(tx2["confirmations"], 1) # Node1's balance should be both transaction amounts: assert_equal(self.nodes[1].getbalance(), -(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.generate(self.nodes[2], 1, sync_fun=self.no_op) # Reconnect the split network, and sync chain: self.connect_nodes(1, 2) self.generate(self.nodes[2], 1) # Mine another block to make sure we sync 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 # minus 1240 for the double-spend, plus fees (which are negative): expected = starting_balance - 1140 + fund_foo_tx["fee"] + fund_bar_tx["fee"] + doublespend_fee print(f"Expected balance: {expected}") print(f"Node 0 balance: {self.nodes[0].getbalance()}") assert_equal(self.nodes[0].getbalance(), expected) # Node1's balance should be its initial balance (50 block rewards) plus the doublespend: assert_equal(self.nodes[1].getbalance(), 1240) if __name__ == '__main__': TxnMallTest().main()