#!/usr/bin/env python3 # Copyright (c) 2015-2016 The Bitcoin Core developers # Distributed under the MIT software license, see the accompanying # file COPYING or http://www.opensource.org/licenses/mit-license.php. from test_framework.blockstore import BlockStore from test_framework.test_framework import ComparisonTestFramework from test_framework.util import * from test_framework.mininode import CTransaction, NetworkThread from test_framework.blocktools import create_coinbase, create_block from test_framework.comptool import TestInstance, TestManager from test_framework.script import CScript, OP_1NEGATE, OP_CHECKSEQUENCEVERIFY, OP_DROP from io import BytesIO import time import itertools ''' This test is meant to exercise BIP forks Connect to a single node. regtest lock-in with 108/144 block signalling activation after a further 144 blocks mine 2 block and save coinbases for later use mine 141 blocks to transition from DEFINED to STARTED mine 100 blocks signalling readiness and 44 not in order to fail to change state this period mine 108 blocks signalling readiness and 36 blocks not signalling readiness (STARTED->LOCKED_IN) mine a further 143 blocks (LOCKED_IN) test that enforcement has not triggered (which triggers ACTIVE) test that enforcement has triggered ''' class BIP9SoftForksTest(ComparisonTestFramework): def __init__(self): super().__init__() self.num_nodes = 1 def setup_network(self): self.nodes = start_nodes(self.num_nodes, self.options.tmpdir, extra_args=[['-debug', '-whitelist=127.0.0.1']], binary=[self.options.testbinary]) def run_test(self): self.test = TestManager(self, self.options.tmpdir) self.test.add_all_connections(self.nodes) NetworkThread().start() # Start up network handling in another thread self.test.run() def create_transaction(self, node, coinbase, to_address, amount): from_txid = node.getblock(coinbase)['tx'][0] inputs = [{ "txid" : from_txid, "vout" : 0}] outputs = { to_address : amount } rawtx = node.createrawtransaction(inputs, outputs) tx = CTransaction() f = BytesIO(hex_str_to_bytes(rawtx)) tx.deserialize(f) tx.nVersion = 2 return tx def sign_transaction(self, node, tx): signresult = node.signrawtransaction(bytes_to_hex_str(tx.serialize())) tx = CTransaction() f = BytesIO(hex_str_to_bytes(signresult['hex'])) tx.deserialize(f) return tx def generate_blocks(self, number, version, test_blocks = []): for i in range(number): block = create_block(self.tip, create_coinbase(self.height), self.last_block_time + 1) block.nVersion = version block.rehash() block.solve() test_blocks.append([block, True]) self.last_block_time += 1 self.tip = block.sha256 self.height += 1 return test_blocks def get_bip9_status(self, key): info = self.nodes[0].getblockchaininfo() return info['bip9_softforks'][key] def test_BIP(self, bipName, activated_version, invalidate, invalidatePostSignature, bitno): assert_equal(self.get_bip9_status(bipName)['status'], 'defined') assert_equal(self.get_bip9_status(bipName)['since'], 0) # generate some coins for later self.coinbase_blocks = self.nodes[0].generate(2) self.height = 3 # height of the next block to build self.tip = int("0x" + self.nodes[0].getbestblockhash(), 0) self.nodeaddress = self.nodes[0].getnewaddress() self.last_block_time = int(time.time()) assert_equal(self.get_bip9_status(bipName)['status'], 'defined') assert_equal(self.get_bip9_status(bipName)['since'], 0) tmpl = self.nodes[0].getblocktemplate({}) assert(bipName not in tmpl['rules']) assert(bipName not in tmpl['vbavailable']) assert_equal(tmpl['vbrequired'], 0) assert_equal(tmpl['version'], 0x20000000) # Test 1 # Advance from DEFINED to STARTED test_blocks = self.generate_blocks(141, 4) yield TestInstance(test_blocks, sync_every_block=False) assert_equal(self.get_bip9_status(bipName)['status'], 'started') assert_equal(self.get_bip9_status(bipName)['since'], 144) tmpl = self.nodes[0].getblocktemplate({}) assert(bipName not in tmpl['rules']) assert_equal(tmpl['vbavailable'][bipName], bitno) assert_equal(tmpl['vbrequired'], 0) assert(tmpl['version'] & activated_version) # Test 2 # Fail to achieve LOCKED_IN 100 out of 144 signal bit 1 # using a variety of bits to simulate multiple parallel softforks test_blocks = self.generate_blocks(50, activated_version) # 0x20000001 (signalling ready) test_blocks = self.generate_blocks(20, 4, test_blocks) # 0x00000004 (signalling not) test_blocks = self.generate_blocks(50, activated_version, test_blocks) # 0x20000101 (signalling ready) test_blocks = self.generate_blocks(24, 4, test_blocks) # 0x20010000 (signalling not) yield TestInstance(test_blocks, sync_every_block=False) assert_equal(self.get_bip9_status(bipName)['status'], 'started') assert_equal(self.get_bip9_status(bipName)['since'], 144) tmpl = self.nodes[0].getblocktemplate({}) assert(bipName not in tmpl['rules']) assert_equal(tmpl['vbavailable'][bipName], bitno) assert_equal(tmpl['vbrequired'], 0) assert(tmpl['version'] & activated_version) # Test 3 # 108 out of 144 signal bit 1 to achieve LOCKED_IN # using a variety of bits to simulate multiple parallel softforks test_blocks = self.generate_blocks(58, activated_version) # 0x20000001 (signalling ready) test_blocks = self.generate_blocks(26, 4, test_blocks) # 0x00000004 (signalling not) test_blocks = self.generate_blocks(50, activated_version, test_blocks) # 0x20000101 (signalling ready) test_blocks = self.generate_blocks(10, 4, test_blocks) # 0x20010000 (signalling not) yield TestInstance(test_blocks, sync_every_block=False) assert_equal(self.get_bip9_status(bipName)['status'], 'locked_in') assert_equal(self.get_bip9_status(bipName)['since'], 432) tmpl = self.nodes[0].getblocktemplate({}) assert(bipName not in tmpl['rules']) # Test 4 # 143 more version 536870913 blocks (waiting period-1) test_blocks = self.generate_blocks(143, 4) yield TestInstance(test_blocks, sync_every_block=False) assert_equal(self.get_bip9_status(bipName)['status'], 'locked_in') assert_equal(self.get_bip9_status(bipName)['since'], 432) tmpl = self.nodes[0].getblocktemplate({}) assert(bipName not in tmpl['rules']) # Test 5 # Check that the new rule is enforced spendtx = self.create_transaction(self.nodes[0], self.coinbase_blocks[0], self.nodeaddress, 1.0) invalidate(spendtx) spendtx = self.sign_transaction(self.nodes[0], spendtx) spendtx.rehash() invalidatePostSignature(spendtx) spendtx.rehash() block = create_block(self.tip, create_coinbase(self.height), self.last_block_time + 1) block.nVersion = activated_version block.vtx.append(spendtx) block.hashMerkleRoot = block.calc_merkle_root() block.rehash() block.solve() self.last_block_time += 1 self.tip = block.sha256 self.height += 1 yield TestInstance([[block, True]]) assert_equal(self.get_bip9_status(bipName)['status'], 'active') assert_equal(self.get_bip9_status(bipName)['since'], 576) tmpl = self.nodes[0].getblocktemplate({}) assert(bipName in tmpl['rules']) assert(bipName not in tmpl['vbavailable']) assert_equal(tmpl['vbrequired'], 0) assert(not (tmpl['version'] & (1 << bitno))) # Test 6 # Check that the new sequence lock rules are enforced spendtx = self.create_transaction(self.nodes[0], self.coinbase_blocks[1], self.nodeaddress, 1.0) invalidate(spendtx) spendtx = self.sign_transaction(self.nodes[0], spendtx) spendtx.rehash() invalidatePostSignature(spendtx) spendtx.rehash() block = create_block(self.tip, create_coinbase(self.height), self.last_block_time + 1) block.nVersion = 5 block.vtx.append(spendtx) block.hashMerkleRoot = block.calc_merkle_root() block.rehash() block.solve() self.last_block_time += 1 yield TestInstance([[block, False]]) # Restart all self.test.block_store.close() stop_nodes(self.nodes) shutil.rmtree(self.options.tmpdir) self.setup_chain() self.setup_network() self.test.block_store = BlockStore(self.options.tmpdir) self.test.clear_all_connections() self.test.add_all_connections(self.nodes) NetworkThread().start() # Start up network handling in another thread def get_tests(self): for test in itertools.chain( self.test_BIP('csv', 0x20000001, self.sequence_lock_invalidate, self.donothing, 0), self.test_BIP('csv', 0x20000001, self.mtp_invalidate, self.donothing, 0), self.test_BIP('csv', 0x20000001, self.donothing, self.csv_invalidate, 0) ): yield test def donothing(self, tx): return def csv_invalidate(self, tx): '''Modify the signature in vin 0 of the tx to fail CSV Prepends -1 CSV DROP in the scriptSig itself. ''' tx.vin[0].scriptSig = CScript([OP_1NEGATE, OP_CHECKSEQUENCEVERIFY, OP_DROP] + list(CScript(tx.vin[0].scriptSig))) def sequence_lock_invalidate(self, tx): '''Modify the nSequence to make it fails once sequence lock rule is activated (high timespan) ''' tx.vin[0].nSequence = 0x00FFFFFF tx.nLockTime = 0 def mtp_invalidate(self, tx): '''Modify the nLockTime to make it fails once MTP rule is activated ''' # Disable Sequence lock, Activate nLockTime tx.vin[0].nSequence = 0x90FFFFFF tx.nLockTime = self.last_block_time if __name__ == '__main__': BIP9SoftForksTest().main()