32d665c265
Addresses #17043, affects RBF and BIP68 functional tests. The "tx-size-small" policy rule rejects transactions with a non-witness size of smaller than 82 bytes (see src/validation.cpp:MemPoolAccept::PreChecks(...)), which corresponds to a transaction with 1 segwit input and 1 P2WPKH output. Through the default address change, the created test transactions have segwit inputs now and sending to short scriptPubKeys might violate this rule. By bumping the dummy scriptPubKey size to 22 bytes (= the size of a P2WPKH scriptPubKey), on all occurences the problem is solved. The dummy scriptPubKey has the format: 21 <21-byte-long string of 'a' or 1s> former commit messages, now squashed: test: rbf, bip68: use constant DUMMY_P2WPKH_SCRIPT for bumped scriptPubKey test: rbf, bip68: use constant DUMMY_P2WPKH_SCRIPT for dummy scriptPubKeys (b'a' * 35) test: rbf, bip68: comment DUMMY_P2WPKH_SCRIPT constant, put into common (new) module
412 lines
18 KiB
Python
Executable file
412 lines
18 KiB
Python
Executable file
#!/usr/bin/env python3
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# Copyright (c) 2014-2019 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 BIP68 implementation."""
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import time
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from test_framework.blocktools import create_block, create_coinbase, add_witness_commitment
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from test_framework.messages import COIN, COutPoint, CTransaction, CTxIn, CTxOut, FromHex, ToHex
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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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assert_greater_than,
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assert_raises_rpc_error,
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satoshi_round,
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softfork_active,
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)
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from test_framework.script_util import DUMMY_P2WPKH_SCRIPT
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SEQUENCE_LOCKTIME_DISABLE_FLAG = (1<<31)
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SEQUENCE_LOCKTIME_TYPE_FLAG = (1<<22) # this means use time (0 means height)
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SEQUENCE_LOCKTIME_GRANULARITY = 9 # this is a bit-shift
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SEQUENCE_LOCKTIME_MASK = 0x0000ffff
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# RPC error for non-BIP68 final transactions
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NOT_FINAL_ERROR = "non-BIP68-final (code 64)"
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class BIP68Test(BitcoinTestFramework):
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def set_test_params(self):
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self.num_nodes = 2
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self.extra_args = [
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["-acceptnonstdtxn=1"],
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["-acceptnonstdtxn=0"],
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]
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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 run_test(self):
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self.relayfee = self.nodes[0].getnetworkinfo()["relayfee"]
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# Generate some coins
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self.nodes[0].generate(110)
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self.log.info("Running test disable flag")
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self.test_disable_flag()
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self.log.info("Running test sequence-lock-confirmed-inputs")
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self.test_sequence_lock_confirmed_inputs()
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self.log.info("Running test sequence-lock-unconfirmed-inputs")
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self.test_sequence_lock_unconfirmed_inputs()
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self.log.info("Running test BIP68 not consensus before activation")
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self.test_bip68_not_consensus()
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self.log.info("Activating BIP68 (and 112/113)")
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self.activateCSV()
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self.log.info("Verifying nVersion=2 transactions are standard.")
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self.log.info("Note that nVersion=2 transactions are always standard (independent of BIP68 activation status).")
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self.test_version2_relay()
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self.log.info("Passed")
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# Test that BIP68 is not in effect if tx version is 1, or if
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# the first sequence bit is set.
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def test_disable_flag(self):
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# Create some unconfirmed inputs
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new_addr = self.nodes[0].getnewaddress()
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self.nodes[0].sendtoaddress(new_addr, 2) # send 2 BTC
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utxos = self.nodes[0].listunspent(0, 0)
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assert len(utxos) > 0
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utxo = utxos[0]
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tx1 = CTransaction()
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value = int(satoshi_round(utxo["amount"] - self.relayfee)*COIN)
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# Check that the disable flag disables relative locktime.
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# If sequence locks were used, this would require 1 block for the
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# input to mature.
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sequence_value = SEQUENCE_LOCKTIME_DISABLE_FLAG | 1
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tx1.vin = [CTxIn(COutPoint(int(utxo["txid"], 16), utxo["vout"]), nSequence=sequence_value)]
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tx1.vout = [CTxOut(value, DUMMY_P2WPKH_SCRIPT)]
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tx1_signed = self.nodes[0].signrawtransactionwithwallet(ToHex(tx1))["hex"]
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tx1_id = self.nodes[0].sendrawtransaction(tx1_signed)
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tx1_id = int(tx1_id, 16)
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# This transaction will enable sequence-locks, so this transaction should
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# fail
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tx2 = CTransaction()
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tx2.nVersion = 2
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sequence_value = sequence_value & 0x7fffffff
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tx2.vin = [CTxIn(COutPoint(tx1_id, 0), nSequence=sequence_value)]
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tx2.vout = [CTxOut(int(value - self.relayfee * COIN), DUMMY_P2WPKH_SCRIPT)]
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tx2.rehash()
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assert_raises_rpc_error(-26, NOT_FINAL_ERROR, self.nodes[0].sendrawtransaction, ToHex(tx2))
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# Setting the version back down to 1 should disable the sequence lock,
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# so this should be accepted.
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tx2.nVersion = 1
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self.nodes[0].sendrawtransaction(ToHex(tx2))
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# Calculate the median time past of a prior block ("confirmations" before
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# the current tip).
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def get_median_time_past(self, confirmations):
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block_hash = self.nodes[0].getblockhash(self.nodes[0].getblockcount()-confirmations)
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return self.nodes[0].getblockheader(block_hash)["mediantime"]
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# Test that sequence locks are respected for transactions spending confirmed inputs.
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def test_sequence_lock_confirmed_inputs(self):
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# Create lots of confirmed utxos, and use them to generate lots of random
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# transactions.
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max_outputs = 50
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addresses = []
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while len(addresses) < max_outputs:
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addresses.append(self.nodes[0].getnewaddress())
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while len(self.nodes[0].listunspent()) < 200:
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import random
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random.shuffle(addresses)
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num_outputs = random.randint(1, max_outputs)
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outputs = {}
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for i in range(num_outputs):
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outputs[addresses[i]] = random.randint(1, 20)*0.01
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self.nodes[0].sendmany("", outputs)
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self.nodes[0].generate(1)
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utxos = self.nodes[0].listunspent()
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# Try creating a lot of random transactions.
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# Each time, choose a random number of inputs, and randomly set
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# some of those inputs to be sequence locked (and randomly choose
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# between height/time locking). Small random chance of making the locks
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# all pass.
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for i in range(400):
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# Randomly choose up to 10 inputs
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num_inputs = random.randint(1, 10)
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random.shuffle(utxos)
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# Track whether any sequence locks used should fail
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should_pass = True
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# Track whether this transaction was built with sequence locks
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using_sequence_locks = False
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tx = CTransaction()
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tx.nVersion = 2
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value = 0
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for j in range(num_inputs):
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sequence_value = 0xfffffffe # this disables sequence locks
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# 50% chance we enable sequence locks
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if random.randint(0,1):
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using_sequence_locks = True
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# 10% of the time, make the input sequence value pass
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input_will_pass = (random.randint(1,10) == 1)
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sequence_value = utxos[j]["confirmations"]
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if not input_will_pass:
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sequence_value += 1
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should_pass = False
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# Figure out what the median-time-past was for the confirmed input
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# Note that if an input has N confirmations, we're going back N blocks
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# from the tip so that we're looking up MTP of the block
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# PRIOR to the one the input appears in, as per the BIP68 spec.
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orig_time = self.get_median_time_past(utxos[j]["confirmations"])
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cur_time = self.get_median_time_past(0) # MTP of the tip
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# can only timelock this input if it's not too old -- otherwise use height
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can_time_lock = True
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if ((cur_time - orig_time) >> SEQUENCE_LOCKTIME_GRANULARITY) >= SEQUENCE_LOCKTIME_MASK:
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can_time_lock = False
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# if time-lockable, then 50% chance we make this a time lock
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if random.randint(0,1) and can_time_lock:
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# Find first time-lock value that fails, or latest one that succeeds
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time_delta = sequence_value << SEQUENCE_LOCKTIME_GRANULARITY
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if input_will_pass and time_delta > cur_time - orig_time:
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sequence_value = ((cur_time - orig_time) >> SEQUENCE_LOCKTIME_GRANULARITY)
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elif (not input_will_pass and time_delta <= cur_time - orig_time):
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sequence_value = ((cur_time - orig_time) >> SEQUENCE_LOCKTIME_GRANULARITY)+1
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sequence_value |= SEQUENCE_LOCKTIME_TYPE_FLAG
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tx.vin.append(CTxIn(COutPoint(int(utxos[j]["txid"], 16), utxos[j]["vout"]), nSequence=sequence_value))
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value += utxos[j]["amount"]*COIN
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# Overestimate the size of the tx - signatures should be less than 120 bytes, and leave 50 for the output
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tx_size = len(ToHex(tx))//2 + 120*num_inputs + 50
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tx.vout.append(CTxOut(int(value-self.relayfee*tx_size*COIN/1000), DUMMY_P2WPKH_SCRIPT))
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rawtx = self.nodes[0].signrawtransactionwithwallet(ToHex(tx))["hex"]
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if (using_sequence_locks and not should_pass):
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# This transaction should be rejected
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assert_raises_rpc_error(-26, NOT_FINAL_ERROR, self.nodes[0].sendrawtransaction, rawtx)
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else:
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# This raw transaction should be accepted
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self.nodes[0].sendrawtransaction(rawtx)
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utxos = self.nodes[0].listunspent()
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# Test that sequence locks on unconfirmed inputs must have nSequence
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# height or time of 0 to be accepted.
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# Then test that BIP68-invalid transactions are removed from the mempool
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# after a reorg.
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def test_sequence_lock_unconfirmed_inputs(self):
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# Store height so we can easily reset the chain at the end of the test
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cur_height = self.nodes[0].getblockcount()
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# Create a mempool tx.
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txid = self.nodes[0].sendtoaddress(self.nodes[0].getnewaddress(), 2)
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tx1 = FromHex(CTransaction(), self.nodes[0].getrawtransaction(txid))
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tx1.rehash()
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# Anyone-can-spend mempool tx.
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# Sequence lock of 0 should pass.
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tx2 = CTransaction()
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tx2.nVersion = 2
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tx2.vin = [CTxIn(COutPoint(tx1.sha256, 0), nSequence=0)]
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tx2.vout = [CTxOut(int(tx1.vout[0].nValue - self.relayfee*COIN), DUMMY_P2WPKH_SCRIPT)]
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tx2_raw = self.nodes[0].signrawtransactionwithwallet(ToHex(tx2))["hex"]
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tx2 = FromHex(tx2, tx2_raw)
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tx2.rehash()
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self.nodes[0].sendrawtransaction(tx2_raw)
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# Create a spend of the 0th output of orig_tx with a sequence lock
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# of 1, and test what happens when submitting.
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# orig_tx.vout[0] must be an anyone-can-spend output
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def test_nonzero_locks(orig_tx, node, relayfee, use_height_lock):
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sequence_value = 1
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if not use_height_lock:
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sequence_value |= SEQUENCE_LOCKTIME_TYPE_FLAG
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tx = CTransaction()
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tx.nVersion = 2
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tx.vin = [CTxIn(COutPoint(orig_tx.sha256, 0), nSequence=sequence_value)]
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tx.vout = [CTxOut(int(orig_tx.vout[0].nValue - relayfee * COIN), DUMMY_P2WPKH_SCRIPT)]
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tx.rehash()
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if (orig_tx.hash in node.getrawmempool()):
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# sendrawtransaction should fail if the tx is in the mempool
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assert_raises_rpc_error(-26, NOT_FINAL_ERROR, node.sendrawtransaction, ToHex(tx))
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else:
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# sendrawtransaction should succeed if the tx is not in the mempool
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node.sendrawtransaction(ToHex(tx))
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return tx
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test_nonzero_locks(tx2, self.nodes[0], self.relayfee, use_height_lock=True)
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test_nonzero_locks(tx2, self.nodes[0], self.relayfee, use_height_lock=False)
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# Now mine some blocks, but make sure tx2 doesn't get mined.
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# Use prioritisetransaction to lower the effective feerate to 0
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self.nodes[0].prioritisetransaction(txid=tx2.hash, fee_delta=int(-self.relayfee*COIN))
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cur_time = int(time.time())
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for i in range(10):
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self.nodes[0].setmocktime(cur_time + 600)
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self.nodes[0].generate(1)
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cur_time += 600
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assert tx2.hash in self.nodes[0].getrawmempool()
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test_nonzero_locks(tx2, self.nodes[0], self.relayfee, use_height_lock=True)
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test_nonzero_locks(tx2, self.nodes[0], self.relayfee, use_height_lock=False)
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# Mine tx2, and then try again
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self.nodes[0].prioritisetransaction(txid=tx2.hash, fee_delta=int(self.relayfee*COIN))
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# Advance the time on the node so that we can test timelocks
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self.nodes[0].setmocktime(cur_time+600)
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self.nodes[0].generate(1)
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assert tx2.hash not in self.nodes[0].getrawmempool()
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# Now that tx2 is not in the mempool, a sequence locked spend should
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# succeed
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tx3 = test_nonzero_locks(tx2, self.nodes[0], self.relayfee, use_height_lock=False)
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assert tx3.hash in self.nodes[0].getrawmempool()
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self.nodes[0].generate(1)
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assert tx3.hash not in self.nodes[0].getrawmempool()
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# One more test, this time using height locks
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tx4 = test_nonzero_locks(tx3, self.nodes[0], self.relayfee, use_height_lock=True)
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assert tx4.hash in self.nodes[0].getrawmempool()
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# Now try combining confirmed and unconfirmed inputs
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tx5 = test_nonzero_locks(tx4, self.nodes[0], self.relayfee, use_height_lock=True)
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assert tx5.hash not in self.nodes[0].getrawmempool()
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utxos = self.nodes[0].listunspent()
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tx5.vin.append(CTxIn(COutPoint(int(utxos[0]["txid"], 16), utxos[0]["vout"]), nSequence=1))
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tx5.vout[0].nValue += int(utxos[0]["amount"]*COIN)
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raw_tx5 = self.nodes[0].signrawtransactionwithwallet(ToHex(tx5))["hex"]
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assert_raises_rpc_error(-26, NOT_FINAL_ERROR, self.nodes[0].sendrawtransaction, raw_tx5)
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# Test mempool-BIP68 consistency after reorg
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#
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# State of the transactions in the last blocks:
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# ... -> [ tx2 ] -> [ tx3 ]
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# tip-1 tip
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# And currently tx4 is in the mempool.
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#
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# If we invalidate the tip, tx3 should get added to the mempool, causing
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# tx4 to be removed (fails sequence-lock).
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self.nodes[0].invalidateblock(self.nodes[0].getbestblockhash())
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assert tx4.hash not in self.nodes[0].getrawmempool()
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assert tx3.hash in self.nodes[0].getrawmempool()
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# Now mine 2 empty blocks to reorg out the current tip (labeled tip-1 in
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# diagram above).
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# This would cause tx2 to be added back to the mempool, which in turn causes
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# tx3 to be removed.
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tip = int(self.nodes[0].getblockhash(self.nodes[0].getblockcount()-1), 16)
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height = self.nodes[0].getblockcount()
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for i in range(2):
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block = create_block(tip, create_coinbase(height), cur_time)
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block.nVersion = 3
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block.rehash()
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block.solve()
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tip = block.sha256
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height += 1
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self.nodes[0].submitblock(ToHex(block))
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cur_time += 1
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mempool = self.nodes[0].getrawmempool()
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assert tx3.hash not in mempool
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assert tx2.hash in mempool
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# Reset the chain and get rid of the mocktimed-blocks
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self.nodes[0].setmocktime(0)
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self.nodes[0].invalidateblock(self.nodes[0].getblockhash(cur_height+1))
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self.nodes[0].generate(10)
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# Make sure that BIP68 isn't being used to validate blocks prior to
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# activation height. If more blocks are mined prior to this test
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# being run, then it's possible the test has activated the soft fork, and
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# this test should be moved to run earlier, or deleted.
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def test_bip68_not_consensus(self):
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assert not softfork_active(self.nodes[0], 'csv')
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txid = self.nodes[0].sendtoaddress(self.nodes[0].getnewaddress(), 2)
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tx1 = FromHex(CTransaction(), self.nodes[0].getrawtransaction(txid))
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tx1.rehash()
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# Make an anyone-can-spend transaction
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tx2 = CTransaction()
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tx2.nVersion = 1
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tx2.vin = [CTxIn(COutPoint(tx1.sha256, 0), nSequence=0)]
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tx2.vout = [CTxOut(int(tx1.vout[0].nValue - self.relayfee*COIN), DUMMY_P2WPKH_SCRIPT)]
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# sign tx2
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tx2_raw = self.nodes[0].signrawtransactionwithwallet(ToHex(tx2))["hex"]
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tx2 = FromHex(tx2, tx2_raw)
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tx2.rehash()
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self.nodes[0].sendrawtransaction(ToHex(tx2))
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# Now make an invalid spend of tx2 according to BIP68
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sequence_value = 100 # 100 block relative locktime
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tx3 = CTransaction()
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tx3.nVersion = 2
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tx3.vin = [CTxIn(COutPoint(tx2.sha256, 0), nSequence=sequence_value)]
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tx3.vout = [CTxOut(int(tx2.vout[0].nValue - self.relayfee * COIN), DUMMY_P2WPKH_SCRIPT)]
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tx3.rehash()
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assert_raises_rpc_error(-26, NOT_FINAL_ERROR, self.nodes[0].sendrawtransaction, ToHex(tx3))
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# make a block that violates bip68; ensure that the tip updates
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tip = int(self.nodes[0].getbestblockhash(), 16)
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block = create_block(tip, create_coinbase(self.nodes[0].getblockcount()+1))
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block.nVersion = 3
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block.vtx.extend([tx1, tx2, tx3])
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block.hashMerkleRoot = block.calc_merkle_root()
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block.rehash()
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add_witness_commitment(block)
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block.solve()
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self.nodes[0].submitblock(block.serialize().hex())
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assert_equal(self.nodes[0].getbestblockhash(), block.hash)
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def activateCSV(self):
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# activation should happen at block height 432 (3 periods)
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# getblockchaininfo will show CSV as active at block 431 (144 * 3 -1) since it's returning whether CSV is active for the next block.
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min_activation_height = 432
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height = self.nodes[0].getblockcount()
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assert_greater_than(min_activation_height - height, 2)
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self.nodes[0].generate(min_activation_height - height - 2)
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assert not softfork_active(self.nodes[0], 'csv')
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self.nodes[0].generate(1)
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assert softfork_active(self.nodes[0], 'csv')
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self.sync_blocks()
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# Use self.nodes[1] to test that version 2 transactions are standard.
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def test_version2_relay(self):
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inputs = [ ]
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outputs = { self.nodes[1].getnewaddress() : 1.0 }
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rawtx = self.nodes[1].createrawtransaction(inputs, outputs)
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rawtxfund = self.nodes[1].fundrawtransaction(rawtx)['hex']
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tx = FromHex(CTransaction(), rawtxfund)
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tx.nVersion = 2
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tx_signed = self.nodes[1].signrawtransactionwithwallet(ToHex(tx))["hex"]
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self.nodes[1].sendrawtransaction(tx_signed)
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if __name__ == '__main__':
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BIP68Test().main()
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