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346 lines
16 KiB
346 lines
16 KiB
#!/usr/bin/env python3
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# Copyright (c) 2017-2021 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 mempool acceptance of raw transactions."""
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from decimal import Decimal
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import math
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from test_framework.test_framework import BitcoinTestFramework
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from test_framework.key import ECKey
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from test_framework.messages import (
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BIP125_SEQUENCE_NUMBER,
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COIN,
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COutPoint,
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CTxIn,
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CTxOut,
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MAX_BLOCK_WEIGHT,
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MAX_MONEY,
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tx_from_hex,
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)
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from test_framework.script import (
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CScript,
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OP_0,
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OP_HASH160,
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OP_RETURN,
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)
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from test_framework.script_util import (
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keys_to_multisig_script,
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script_to_p2sh_script,
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)
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from test_framework.util import (
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assert_equal,
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assert_raises_rpc_error,
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)
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class MempoolAcceptanceTest(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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'-txindex','-permitbaremultisig=0',
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]] * self.num_nodes
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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 check_mempool_result(self, result_expected, *args, **kwargs):
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"""Wrapper to check result of testmempoolaccept on node_0's mempool"""
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result_test = self.nodes[0].testmempoolaccept(*args, **kwargs)
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for r in result_test:
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r.pop('wtxid') # Skip check for now
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assert_equal(result_expected, result_test)
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assert_equal(self.nodes[0].getmempoolinfo()['size'], self.mempool_size) # Must not change mempool state
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def run_test(self):
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node = self.nodes[0]
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self.log.info('Start with empty mempool, and 200 blocks')
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self.mempool_size = 0
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assert_equal(node.getblockcount(), 200)
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assert_equal(node.getmempoolinfo()['size'], self.mempool_size)
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coins = node.listunspent()
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self.log.info('Should not accept garbage to testmempoolaccept')
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assert_raises_rpc_error(-3, 'Expected type array, got string', lambda: node.testmempoolaccept(rawtxs='ff00baar'))
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assert_raises_rpc_error(-8, 'Array must contain between 1 and 25 transactions.', lambda: node.testmempoolaccept(rawtxs=['ff22']*26))
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assert_raises_rpc_error(-8, 'Array must contain between 1 and 25 transactions.', lambda: node.testmempoolaccept(rawtxs=[]))
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assert_raises_rpc_error(-22, 'TX decode failed', lambda: node.testmempoolaccept(rawtxs=['ff00baar']))
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self.log.info('A transaction already in the blockchain')
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coin = coins.pop() # Pick a random coin(base) to spend
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raw_tx_in_block = node.signrawtransactionwithwallet(node.createrawtransaction(
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inputs=[{'txid': coin['txid'], 'vout': coin['vout']}],
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outputs=[{node.getnewaddress(): 0.3}, {node.getnewaddress(): 49}],
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))['hex']
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txid_in_block = node.sendrawtransaction(hexstring=raw_tx_in_block, maxfeerate=0)
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self.generate(node, 1)
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self.mempool_size = 0
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self.check_mempool_result(
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result_expected=[{'txid': txid_in_block, 'allowed': False, 'reject-reason': 'txn-already-known'}],
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rawtxs=[raw_tx_in_block],
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)
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self.log.info('A transaction not in the mempool')
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fee = Decimal('0.000007')
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raw_tx_0 = node.signrawtransactionwithwallet(node.createrawtransaction(
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inputs=[{"txid": txid_in_block, "vout": 0, "sequence": BIP125_SEQUENCE_NUMBER}], # RBF is used later
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outputs=[{node.getnewaddress(): Decimal('0.3') - fee}],
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))['hex']
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tx = tx_from_hex(raw_tx_0)
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txid_0 = tx.rehash()
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self.check_mempool_result(
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result_expected=[{'txid': txid_0, 'allowed': True, 'vsize': tx.get_vsize(), 'fees': {'base': fee}}],
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rawtxs=[raw_tx_0],
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)
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self.log.info('A final transaction not in the mempool')
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coin = coins.pop() # Pick a random coin(base) to spend
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output_amount = Decimal('0.025')
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raw_tx_final = node.signrawtransactionwithwallet(node.createrawtransaction(
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inputs=[{'txid': coin['txid'], 'vout': coin['vout'], "sequence": 0xffffffff}], # SEQUENCE_FINAL
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outputs=[{node.getnewaddress(): output_amount}],
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locktime=node.getblockcount() + 2000, # Can be anything
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))['hex']
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tx = tx_from_hex(raw_tx_final)
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fee_expected = coin['amount'] - output_amount
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self.check_mempool_result(
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result_expected=[{'txid': tx.rehash(), 'allowed': True, 'vsize': tx.get_vsize(), 'fees': {'base': fee_expected}}],
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rawtxs=[tx.serialize().hex()],
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maxfeerate=0,
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)
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node.sendrawtransaction(hexstring=raw_tx_final, maxfeerate=0)
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self.mempool_size += 1
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self.log.info('A transaction in the mempool')
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node.sendrawtransaction(hexstring=raw_tx_0)
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self.mempool_size += 1
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self.check_mempool_result(
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result_expected=[{'txid': txid_0, 'allowed': False, 'reject-reason': 'txn-already-in-mempool'}],
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rawtxs=[raw_tx_0],
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)
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self.log.info('A transaction that replaces a mempool transaction')
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tx = tx_from_hex(raw_tx_0)
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tx.vout[0].nValue -= int(fee * COIN) # Double the fee
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tx.vin[0].nSequence = BIP125_SEQUENCE_NUMBER + 1 # Now, opt out of RBF
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raw_tx_0 = node.signrawtransactionwithwallet(tx.serialize().hex())['hex']
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tx = tx_from_hex(raw_tx_0)
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txid_0 = tx.rehash()
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self.check_mempool_result(
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result_expected=[{'txid': txid_0, 'allowed': True, 'vsize': tx.get_vsize(), 'fees': {'base': (2 * fee)}}],
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rawtxs=[raw_tx_0],
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)
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self.log.info('A transaction that conflicts with an unconfirmed tx')
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# Send the transaction that replaces the mempool transaction and opts out of replaceability
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node.sendrawtransaction(hexstring=tx.serialize().hex(), maxfeerate=0)
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# take original raw_tx_0
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tx = tx_from_hex(raw_tx_0)
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tx.vout[0].nValue -= int(4 * fee * COIN) # Set more fee
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# skip re-signing the tx
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self.check_mempool_result(
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result_expected=[{'txid': tx.rehash(), 'allowed': False, 'reject-reason': 'txn-mempool-conflict'}],
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rawtxs=[tx.serialize().hex()],
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maxfeerate=0,
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)
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self.log.info('A transaction with missing inputs, that never existed')
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tx = tx_from_hex(raw_tx_0)
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tx.vin[0].prevout = COutPoint(hash=int('ff' * 32, 16), n=14)
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# skip re-signing the tx
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self.check_mempool_result(
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result_expected=[{'txid': tx.rehash(), 'allowed': False, 'reject-reason': 'missing-inputs'}],
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rawtxs=[tx.serialize().hex()],
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)
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self.log.info('A transaction with missing inputs, that existed once in the past')
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tx = tx_from_hex(raw_tx_0)
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tx.vin[0].prevout.n = 1 # Set vout to 1, to spend the other outpoint (49 coins) of the in-chain-tx we want to double spend
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raw_tx_1 = node.signrawtransactionwithwallet(tx.serialize().hex())['hex']
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txid_1 = node.sendrawtransaction(hexstring=raw_tx_1, maxfeerate=0)
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# Now spend both to "clearly hide" the outputs, ie. remove the coins from the utxo set by spending them
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raw_tx_spend_both = node.signrawtransactionwithwallet(node.createrawtransaction(
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inputs=[
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{'txid': txid_0, 'vout': 0},
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{'txid': txid_1, 'vout': 0},
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],
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outputs=[{node.getnewaddress(): 0.1}]
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))['hex']
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txid_spend_both = node.sendrawtransaction(hexstring=raw_tx_spend_both, maxfeerate=0)
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self.generate(node, 1)
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self.mempool_size = 0
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# Now see if we can add the coins back to the utxo set by sending the exact txs again
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self.check_mempool_result(
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result_expected=[{'txid': txid_0, 'allowed': False, 'reject-reason': 'missing-inputs'}],
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rawtxs=[raw_tx_0],
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)
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self.check_mempool_result(
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result_expected=[{'txid': txid_1, 'allowed': False, 'reject-reason': 'missing-inputs'}],
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rawtxs=[raw_tx_1],
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)
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self.log.info('Create a signed "reference" tx for later use')
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raw_tx_reference = node.signrawtransactionwithwallet(node.createrawtransaction(
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inputs=[{'txid': txid_spend_both, 'vout': 0}],
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outputs=[{node.getnewaddress(): 0.05}],
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))['hex']
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tx = tx_from_hex(raw_tx_reference)
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# Reference tx should be valid on itself
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self.check_mempool_result(
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result_expected=[{'txid': tx.rehash(), 'allowed': True, 'vsize': tx.get_vsize(), 'fees': { 'base': Decimal('0.1') - Decimal('0.05')}}],
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rawtxs=[tx.serialize().hex()],
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maxfeerate=0,
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)
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self.log.info('A transaction with no outputs')
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tx = tx_from_hex(raw_tx_reference)
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tx.vout = []
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# Skip re-signing the transaction for context independent checks from now on
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# tx = tx_from_hex(node.signrawtransactionwithwallet(tx.serialize().hex())['hex'])
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self.check_mempool_result(
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result_expected=[{'txid': tx.rehash(), 'allowed': False, 'reject-reason': 'bad-txns-vout-empty'}],
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rawtxs=[tx.serialize().hex()],
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)
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self.log.info('A really large transaction')
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tx = tx_from_hex(raw_tx_reference)
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tx.vin = [tx.vin[0]] * math.ceil(MAX_BLOCK_WEIGHT // 4 / len(tx.vin[0].serialize()))
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self.check_mempool_result(
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result_expected=[{'txid': tx.rehash(), 'allowed': False, 'reject-reason': 'bad-txns-oversize'}],
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rawtxs=[tx.serialize().hex()],
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)
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self.log.info('A transaction with negative output value')
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tx = tx_from_hex(raw_tx_reference)
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tx.vout[0].nValue *= -1
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self.check_mempool_result(
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result_expected=[{'txid': tx.rehash(), 'allowed': False, 'reject-reason': 'bad-txns-vout-negative'}],
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rawtxs=[tx.serialize().hex()],
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)
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# The following two validations prevent overflow of the output amounts (see CVE-2010-5139).
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self.log.info('A transaction with too large output value')
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tx = tx_from_hex(raw_tx_reference)
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tx.vout[0].nValue = MAX_MONEY + 1
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self.check_mempool_result(
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result_expected=[{'txid': tx.rehash(), 'allowed': False, 'reject-reason': 'bad-txns-vout-toolarge'}],
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rawtxs=[tx.serialize().hex()],
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)
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self.log.info('A transaction with too large sum of output values')
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tx = tx_from_hex(raw_tx_reference)
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tx.vout = [tx.vout[0]] * 2
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tx.vout[0].nValue = MAX_MONEY
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self.check_mempool_result(
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result_expected=[{'txid': tx.rehash(), 'allowed': False, 'reject-reason': 'bad-txns-txouttotal-toolarge'}],
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rawtxs=[tx.serialize().hex()],
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)
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self.log.info('A transaction with duplicate inputs')
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tx = tx_from_hex(raw_tx_reference)
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tx.vin = [tx.vin[0]] * 2
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self.check_mempool_result(
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result_expected=[{'txid': tx.rehash(), 'allowed': False, 'reject-reason': 'bad-txns-inputs-duplicate'}],
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rawtxs=[tx.serialize().hex()],
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)
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self.log.info('A non-coinbase transaction with coinbase-like outpoint')
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tx = tx_from_hex(raw_tx_reference)
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tx.vin.append(CTxIn(COutPoint(hash=0, n=0xffffffff)))
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self.check_mempool_result(
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result_expected=[{'txid': tx.rehash(), 'allowed': False, 'reject-reason': 'bad-txns-prevout-null'}],
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rawtxs=[tx.serialize().hex()],
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)
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self.log.info('A coinbase transaction')
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# Pick the input of the first tx we signed, so it has to be a coinbase tx
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raw_tx_coinbase_spent = node.getrawtransaction(txid=node.decoderawtransaction(hexstring=raw_tx_in_block)['vin'][0]['txid'])
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tx = tx_from_hex(raw_tx_coinbase_spent)
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self.check_mempool_result(
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result_expected=[{'txid': tx.rehash(), 'allowed': False, 'reject-reason': 'coinbase'}],
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rawtxs=[tx.serialize().hex()],
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)
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self.log.info('Some nonstandard transactions')
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tx = tx_from_hex(raw_tx_reference)
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tx.nVersion = 3 # A version currently non-standard
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self.check_mempool_result(
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result_expected=[{'txid': tx.rehash(), 'allowed': False, 'reject-reason': 'version'}],
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rawtxs=[tx.serialize().hex()],
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)
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tx = tx_from_hex(raw_tx_reference)
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tx.vout[0].scriptPubKey = CScript([OP_0]) # Some non-standard script
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self.check_mempool_result(
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result_expected=[{'txid': tx.rehash(), 'allowed': False, 'reject-reason': 'scriptpubkey'}],
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rawtxs=[tx.serialize().hex()],
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)
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tx = tx_from_hex(raw_tx_reference)
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key = ECKey()
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key.generate()
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pubkey = key.get_pubkey().get_bytes()
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tx.vout[0].scriptPubKey = keys_to_multisig_script([pubkey] * 3, k=2) # Some bare multisig script (2-of-3)
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self.check_mempool_result(
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result_expected=[{'txid': tx.rehash(), 'allowed': False, 'reject-reason': 'bare-multisig'}],
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rawtxs=[tx.serialize().hex()],
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)
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tx = tx_from_hex(raw_tx_reference)
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tx.vin[0].scriptSig = CScript([OP_HASH160]) # Some not-pushonly scriptSig
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self.check_mempool_result(
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result_expected=[{'txid': tx.rehash(), 'allowed': False, 'reject-reason': 'scriptsig-not-pushonly'}],
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rawtxs=[tx.serialize().hex()],
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)
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tx = tx_from_hex(raw_tx_reference)
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tx.vin[0].scriptSig = CScript([b'a' * 1648]) # Some too large scriptSig (>1650 bytes)
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self.check_mempool_result(
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result_expected=[{'txid': tx.rehash(), 'allowed': False, 'reject-reason': 'scriptsig-size'}],
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rawtxs=[tx.serialize().hex()],
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)
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tx = tx_from_hex(raw_tx_reference)
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output_p2sh_burn = CTxOut(nValue=540, scriptPubKey=script_to_p2sh_script(b'burn'))
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num_scripts = 100000 // len(output_p2sh_burn.serialize()) # Use enough outputs to make the tx too large for our policy
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tx.vout = [output_p2sh_burn] * num_scripts
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self.check_mempool_result(
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result_expected=[{'txid': tx.rehash(), 'allowed': False, 'reject-reason': 'tx-size'}],
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rawtxs=[tx.serialize().hex()],
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)
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tx = tx_from_hex(raw_tx_reference)
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tx.vout[0] = output_p2sh_burn
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tx.vout[0].nValue -= 1 # Make output smaller, such that it is dust for our policy
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self.check_mempool_result(
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result_expected=[{'txid': tx.rehash(), 'allowed': False, 'reject-reason': 'dust'}],
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rawtxs=[tx.serialize().hex()],
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)
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tx = tx_from_hex(raw_tx_reference)
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tx.vout[0].scriptPubKey = CScript([OP_RETURN, b'\xff'])
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tx.vout = [tx.vout[0]] * 2
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self.check_mempool_result(
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result_expected=[{'txid': tx.rehash(), 'allowed': False, 'reject-reason': 'multi-op-return'}],
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rawtxs=[tx.serialize().hex()],
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)
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self.log.info('A timelocked transaction')
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tx = tx_from_hex(raw_tx_reference)
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tx.vin[0].nSequence -= 1 # Should be non-max, so locktime is not ignored
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tx.nLockTime = node.getblockcount() + 1
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self.check_mempool_result(
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result_expected=[{'txid': tx.rehash(), 'allowed': False, 'reject-reason': 'non-final'}],
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rawtxs=[tx.serialize().hex()],
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)
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self.log.info('A transaction that is locked by BIP68 sequence logic')
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tx = tx_from_hex(raw_tx_reference)
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tx.vin[0].nSequence = 2 # We could include it in the second block mined from now, but not the very next one
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# Can skip re-signing the tx because of early rejection
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self.check_mempool_result(
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result_expected=[{'txid': tx.rehash(), 'allowed': False, 'reject-reason': 'non-BIP68-final'}],
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rawtxs=[tx.serialize().hex()],
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maxfeerate=0,
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)
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if __name__ == '__main__':
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MempoolAcceptanceTest().main()
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