156 lines
6.7 KiB
Python
Executable file
156 lines
6.7 KiB
Python
Executable file
#!/usr/bin/env python3
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# Copyright (c) 2015-2018 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 node responses to invalid transactions.
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In this test we connect to one node over p2p, and test tx requests."""
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from test_framework.blocktools import create_block, create_coinbase
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from test_framework.messages import (
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COIN,
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COutPoint,
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CTransaction,
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CTxIn,
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CTxOut,
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)
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from test_framework.mininode import P2PDataStore
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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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wait_until,
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)
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from data import invalid_txs
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class InvalidTxRequestTest(BitcoinTestFramework):
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def set_test_params(self):
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self.num_nodes = 1
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self.extra_args = [[
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"-acceptnonstdtxn=1",
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]]
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self.setup_clean_chain = True
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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 bootstrap_p2p(self, *, num_connections=1):
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"""Add a P2P connection to the node.
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Helper to connect and wait for version handshake."""
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for _ in range(num_connections):
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self.nodes[0].add_p2p_connection(P2PDataStore())
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def reconnect_p2p(self, **kwargs):
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"""Tear down and bootstrap the P2P connection to the node.
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The node gets disconnected several times in this test. This helper
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method reconnects the p2p and restarts the network thread."""
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self.nodes[0].disconnect_p2ps()
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self.bootstrap_p2p(**kwargs)
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def run_test(self):
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node = self.nodes[0] # convenience reference to the node
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self.bootstrap_p2p() # Add one p2p connection to the node
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best_block = self.nodes[0].getbestblockhash()
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tip = int(best_block, 16)
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best_block_time = self.nodes[0].getblock(best_block)['time']
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block_time = best_block_time + 1
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self.log.info("Create a new block with an anyone-can-spend coinbase.")
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height = 1
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block = create_block(tip, create_coinbase(height), block_time)
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block.solve()
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# Save the coinbase for later
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block1 = block
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tip = block.sha256
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node.p2p.send_blocks_and_test([block], node, success=True)
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self.log.info("Mature the block.")
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self.nodes[0].generatetoaddress(100, self.nodes[0].get_deterministic_priv_key().address)
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# Iterate through a list of known invalid transaction types, ensuring each is
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# rejected. Some are consensus invalid and some just violate policy.
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for BadTxTemplate in invalid_txs.iter_all_templates():
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self.log.info("Testing invalid transaction: %s", BadTxTemplate.__name__)
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template = BadTxTemplate(spend_block=block1)
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tx = template.get_tx()
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node.p2p.send_txs_and_test(
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[tx], node, success=False,
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expect_disconnect=template.expect_disconnect,
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reject_reason=template.reject_reason,
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)
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if template.expect_disconnect:
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self.log.info("Reconnecting to peer")
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self.reconnect_p2p()
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# Make two p2p connections to provide the node with orphans
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# * p2ps[0] will send valid orphan txs (one with low fee)
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# * p2ps[1] will send an invalid orphan tx (and is later disconnected for that)
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self.reconnect_p2p(num_connections=2)
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self.log.info('Test orphan transaction handling ... ')
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# Create a root transaction that we withhold until all dependent transactions
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# are sent out and in the orphan cache
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SCRIPT_PUB_KEY_OP_TRUE = b'\x51\x75' * 15 + b'\x51'
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tx_withhold = CTransaction()
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tx_withhold.vin.append(CTxIn(outpoint=COutPoint(block1.vtx[0].sha256, 0)))
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tx_withhold.vout.append(CTxOut(nValue=int(1 * COIN) - 240, scriptPubKey=SCRIPT_PUB_KEY_OP_TRUE))
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tx_withhold.calc_sha256()
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# Our first orphan tx with some outputs to create further orphan txs
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tx_orphan_1 = CTransaction()
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tx_orphan_1.vin.append(CTxIn(outpoint=COutPoint(tx_withhold.sha256, 0)))
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tx_orphan_1.vout = [CTxOut(nValue=int(0.2 * COIN), scriptPubKey=SCRIPT_PUB_KEY_OP_TRUE)] * 3
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tx_orphan_1.calc_sha256()
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# A valid transaction with low fee
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tx_orphan_2_no_fee = CTransaction()
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tx_orphan_2_no_fee.vin.append(CTxIn(outpoint=COutPoint(tx_orphan_1.sha256, 0)))
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tx_orphan_2_no_fee.vout.append(CTxOut(nValue=int(0.2 * COIN), scriptPubKey=SCRIPT_PUB_KEY_OP_TRUE))
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# A valid transaction with sufficient fee
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tx_orphan_2_valid = CTransaction()
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tx_orphan_2_valid.vin.append(CTxIn(outpoint=COutPoint(tx_orphan_1.sha256, 1)))
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tx_orphan_2_valid.vout.append(CTxOut(nValue=int(0.2 * COIN) - 240, scriptPubKey=SCRIPT_PUB_KEY_OP_TRUE))
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tx_orphan_2_valid.calc_sha256()
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# An invalid transaction with negative fee
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tx_orphan_2_invalid = CTransaction()
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tx_orphan_2_invalid.vin.append(CTxIn(outpoint=COutPoint(tx_orphan_1.sha256, 2)))
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tx_orphan_2_invalid.vout.append(CTxOut(nValue=int(0.22 * COIN), scriptPubKey=SCRIPT_PUB_KEY_OP_TRUE))
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self.log.info('Send the orphans ... ')
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# Send valid orphan txs from p2ps[0]
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node.p2p.send_txs_and_test([tx_orphan_1, tx_orphan_2_no_fee, tx_orphan_2_valid], node, success=False)
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# Send invalid tx from p2ps[1]
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node.p2ps[1].send_txs_and_test([tx_orphan_2_invalid], node, success=False)
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assert_equal(0, node.getmempoolinfo()['size']) # Mempool should be empty
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assert_equal(2, len(node.getpeerinfo())) # p2ps[1] is still connected
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self.log.info('Send the withhold tx ... ')
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with node.assert_debug_log(expected_msgs=["bad-txns-in-belowout"]):
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node.p2p.send_txs_and_test([tx_withhold], node, success=True)
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# Transactions that should end up in the mempool
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expected_mempool = {
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t.hash
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for t in [
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tx_withhold, # The transaction that is the root for all orphans
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tx_orphan_1, # The orphan transaction that splits the coins
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tx_orphan_2_valid, # The valid transaction (with sufficient fee)
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]
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}
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# Transactions that do not end up in the mempool
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# tx_orphan_no_fee, because it has too low fee (p2ps[0] is not disconnected for relaying that tx)
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# tx_orphan_invaid, because it has negative fee (p2ps[1] is disconnected for relaying that tx)
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wait_until(lambda: 1 == len(node.getpeerinfo()), timeout=1) # p2ps[1] is no longer connected
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assert_equal(expected_mempool, set(node.getrawmempool()))
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if __name__ == '__main__':
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InvalidTxRequestTest().main()
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