Initial Vexta Core v0.1.0 release

test/functional/wallet_txn_doublespend.py

@@ -0,0 +1,163 @@
+#!/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()