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284 lines
13 KiB
Python
Executable File
284 lines
13 KiB
Python
Executable File
#!/usr/bin/env python3
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# Copyright (c) 2015-2016 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 BIP 9 soft forks.
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Connect to a single node.
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regtest lock-in with 108/144 block signalling
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activation after a further 144 blocks
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mine 2 block and save coinbases for later use
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mine 141 blocks to transition from DEFINED to STARTED
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mine 100 blocks signalling readiness and 44 not in order to fail to change state this period
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mine 108 blocks signalling readiness and 36 blocks not signalling readiness (STARTED->LOCKED_IN)
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mine a further 143 blocks (LOCKED_IN)
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test that enforcement has not triggered (which triggers ACTIVE)
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test that enforcement has triggered
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"""
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from io import BytesIO
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import shutil
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import time
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import itertools
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from test_framework.test_framework import ComparisonTestFramework
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from test_framework.util import *
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from test_framework.mininode import CTransaction, network_thread_start
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from test_framework.blocktools import create_coinbase, create_block
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from test_framework.comptool import TestInstance, TestManager
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from test_framework.script import CScript, OP_1NEGATE, OP_CHECKSEQUENCEVERIFY, OP_DROP
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class BIP9SoftForksTest(ComparisonTestFramework):
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def set_test_params(self):
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self.num_nodes = 1
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self.extra_args = [['-whitelist=127.0.0.1']]
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self.setup_clean_chain = True
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def run_test(self):
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self.test = TestManager(self, self.options.tmpdir)
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self.test.add_all_connections(self.nodes)
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network_thread_start()
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self.test.run()
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def create_transaction(self, node, coinbase, to_address, amount):
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from_txid = node.getblock(coinbase)['tx'][0]
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inputs = [{ "txid" : from_txid, "vout" : 0}]
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outputs = { to_address : amount }
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rawtx = node.createrawtransaction(inputs, outputs)
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tx = CTransaction()
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f = BytesIO(hex_str_to_bytes(rawtx))
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tx.deserialize(f)
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tx.nVersion = 2
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return tx
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def sign_transaction(self, node, tx):
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signresult = node.signrawtransaction(bytes_to_hex_str(tx.serialize()))
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tx = CTransaction()
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f = BytesIO(hex_str_to_bytes(signresult['hex']))
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tx.deserialize(f)
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return tx
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def generate_blocks(self, number, version, test_blocks = []):
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for i in range(number):
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block = create_block(self.tip, create_coinbase(self.height), self.last_block_time + 1)
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block.nVersion = version
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block.rehash()
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block.solve()
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test_blocks.append([block, True])
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self.last_block_time += 1
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self.tip = block.sha256
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self.height += 1
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return test_blocks
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def get_bip9_status(self, key):
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info = self.nodes[0].getblockchaininfo()
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return info['bip9_softforks'][key]
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def test_BIP(self, bipName, activated_version, invalidate, invalidatePostSignature, bitno):
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assert_equal(self.get_bip9_status(bipName)['status'], 'defined')
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assert_equal(self.get_bip9_status(bipName)['since'], 0)
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# generate some coins for later
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self.coinbase_blocks = self.nodes[0].generate(2)
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self.height = 3 # height of the next block to build
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self.tip = int("0x" + self.nodes[0].getbestblockhash(), 0)
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self.nodeaddress = self.nodes[0].getnewaddress()
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self.last_block_time = int(time.time())
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assert_equal(self.get_bip9_status(bipName)['status'], 'defined')
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assert_equal(self.get_bip9_status(bipName)['since'], 0)
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tmpl = self.nodes[0].getblocktemplate({})
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assert(bipName not in tmpl['rules'])
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assert(bipName not in tmpl['vbavailable'])
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assert_equal(tmpl['vbrequired'], 0)
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assert_equal(tmpl['version'], 0x20000000)
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# Test 1
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# Advance from DEFINED to STARTED
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test_blocks = self.generate_blocks(141, 4)
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yield TestInstance(test_blocks, sync_every_block=False)
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assert_equal(self.get_bip9_status(bipName)['status'], 'started')
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assert_equal(self.get_bip9_status(bipName)['since'], 144)
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assert_equal(self.get_bip9_status(bipName)['statistics']['elapsed'], 0)
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assert_equal(self.get_bip9_status(bipName)['statistics']['count'], 0)
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tmpl = self.nodes[0].getblocktemplate({})
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assert(bipName not in tmpl['rules'])
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assert_equal(tmpl['vbavailable'][bipName], bitno)
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assert_equal(tmpl['vbrequired'], 0)
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assert(tmpl['version'] & activated_version)
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# Test 1-A
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# check stats after max number of "signalling not" blocks such that LOCKED_IN still possible this period
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test_blocks = self.generate_blocks(36, 4, test_blocks) # 0x00000004 (signalling not)
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test_blocks = self.generate_blocks(10, activated_version) # 0x20000001 (signalling ready)
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yield TestInstance(test_blocks, sync_every_block=False)
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assert_equal(self.get_bip9_status(bipName)['statistics']['elapsed'], 46)
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assert_equal(self.get_bip9_status(bipName)['statistics']['count'], 10)
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assert_equal(self.get_bip9_status(bipName)['statistics']['possible'], True)
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# Test 1-B
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# check stats after one additional "signalling not" block -- LOCKED_IN no longer possible this period
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test_blocks = self.generate_blocks(1, 4, test_blocks) # 0x00000004 (signalling not)
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yield TestInstance(test_blocks, sync_every_block=False)
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assert_equal(self.get_bip9_status(bipName)['statistics']['elapsed'], 47)
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assert_equal(self.get_bip9_status(bipName)['statistics']['count'], 10)
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assert_equal(self.get_bip9_status(bipName)['statistics']['possible'], False)
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# Test 1-C
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# finish period with "ready" blocks, but soft fork will still fail to advance to LOCKED_IN
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test_blocks = self.generate_blocks(97, activated_version) # 0x20000001 (signalling ready)
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yield TestInstance(test_blocks, sync_every_block=False)
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assert_equal(self.get_bip9_status(bipName)['statistics']['elapsed'], 0)
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assert_equal(self.get_bip9_status(bipName)['statistics']['count'], 0)
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assert_equal(self.get_bip9_status(bipName)['statistics']['possible'], True)
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assert_equal(self.get_bip9_status(bipName)['status'], 'started')
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# Test 2
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# Fail to achieve LOCKED_IN 100 out of 144 signal bit 1
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# using a variety of bits to simulate multiple parallel softforks
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test_blocks = self.generate_blocks(50, activated_version) # 0x20000001 (signalling ready)
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test_blocks = self.generate_blocks(20, 4, test_blocks) # 0x00000004 (signalling not)
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test_blocks = self.generate_blocks(50, activated_version, test_blocks) # 0x20000101 (signalling ready)
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test_blocks = self.generate_blocks(24, 4, test_blocks) # 0x20010000 (signalling not)
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yield TestInstance(test_blocks, sync_every_block=False)
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assert_equal(self.get_bip9_status(bipName)['status'], 'started')
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assert_equal(self.get_bip9_status(bipName)['since'], 144)
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assert_equal(self.get_bip9_status(bipName)['statistics']['elapsed'], 0)
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assert_equal(self.get_bip9_status(bipName)['statistics']['count'], 0)
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tmpl = self.nodes[0].getblocktemplate({})
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assert(bipName not in tmpl['rules'])
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assert_equal(tmpl['vbavailable'][bipName], bitno)
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assert_equal(tmpl['vbrequired'], 0)
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assert(tmpl['version'] & activated_version)
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# Test 3
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# 108 out of 144 signal bit 1 to achieve LOCKED_IN
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# using a variety of bits to simulate multiple parallel softforks
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test_blocks = self.generate_blocks(57, activated_version) # 0x20000001 (signalling ready)
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test_blocks = self.generate_blocks(26, 4, test_blocks) # 0x00000004 (signalling not)
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test_blocks = self.generate_blocks(50, activated_version, test_blocks) # 0x20000101 (signalling ready)
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test_blocks = self.generate_blocks(10, 4, test_blocks) # 0x20010000 (signalling not)
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yield TestInstance(test_blocks, sync_every_block=False)
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# check counting stats and "possible" flag before last block of this period achieves LOCKED_IN...
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assert_equal(self.get_bip9_status(bipName)['statistics']['elapsed'], 143)
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assert_equal(self.get_bip9_status(bipName)['statistics']['count'], 107)
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assert_equal(self.get_bip9_status(bipName)['statistics']['possible'], True)
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assert_equal(self.get_bip9_status(bipName)['status'], 'started')
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# ...continue with Test 3
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test_blocks = self.generate_blocks(1, activated_version) # 0x20000001 (signalling ready)
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yield TestInstance(test_blocks, sync_every_block=False)
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assert_equal(self.get_bip9_status(bipName)['status'], 'locked_in')
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assert_equal(self.get_bip9_status(bipName)['since'], 576)
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tmpl = self.nodes[0].getblocktemplate({})
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assert(bipName not in tmpl['rules'])
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# Test 4
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# 143 more version 536870913 blocks (waiting period-1)
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test_blocks = self.generate_blocks(143, 4)
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yield TestInstance(test_blocks, sync_every_block=False)
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assert_equal(self.get_bip9_status(bipName)['status'], 'locked_in')
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assert_equal(self.get_bip9_status(bipName)['since'], 576)
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tmpl = self.nodes[0].getblocktemplate({})
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assert(bipName not in tmpl['rules'])
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# Test 5
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# Check that the new rule is enforced
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spendtx = self.create_transaction(self.nodes[0],
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self.coinbase_blocks[0], self.nodeaddress, 1.0)
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invalidate(spendtx)
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spendtx = self.sign_transaction(self.nodes[0], spendtx)
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spendtx.rehash()
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invalidatePostSignature(spendtx)
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spendtx.rehash()
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block = create_block(self.tip, create_coinbase(self.height), self.last_block_time + 1)
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block.nVersion = activated_version
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block.vtx.append(spendtx)
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block.hashMerkleRoot = block.calc_merkle_root()
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block.rehash()
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block.solve()
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self.last_block_time += 1
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self.tip = block.sha256
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self.height += 1
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yield TestInstance([[block, True]])
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assert_equal(self.get_bip9_status(bipName)['status'], 'active')
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assert_equal(self.get_bip9_status(bipName)['since'], 720)
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tmpl = self.nodes[0].getblocktemplate({})
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assert(bipName in tmpl['rules'])
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assert(bipName not in tmpl['vbavailable'])
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assert_equal(tmpl['vbrequired'], 0)
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assert(not (tmpl['version'] & (1 << bitno)))
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# Test 6
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# Check that the new sequence lock rules are enforced
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spendtx = self.create_transaction(self.nodes[0],
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self.coinbase_blocks[1], self.nodeaddress, 1.0)
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invalidate(spendtx)
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spendtx = self.sign_transaction(self.nodes[0], spendtx)
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spendtx.rehash()
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invalidatePostSignature(spendtx)
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spendtx.rehash()
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block = create_block(self.tip, create_coinbase(self.height), self.last_block_time + 1)
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block.nVersion = 5
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block.vtx.append(spendtx)
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block.hashMerkleRoot = block.calc_merkle_root()
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block.rehash()
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block.solve()
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self.last_block_time += 1
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yield TestInstance([[block, False]])
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# Restart all
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self.test.clear_all_connections()
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self.stop_nodes()
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self.nodes = []
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shutil.rmtree(self.options.tmpdir + "/node0")
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self.setup_chain()
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self.setup_network()
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self.test.add_all_connections(self.nodes)
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network_thread_start()
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self.test.p2p_connections[0].wait_for_verack()
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def get_tests(self):
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for test in itertools.chain(
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self.test_BIP('csv', 0x20000001, self.sequence_lock_invalidate, self.donothing, 0),
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self.test_BIP('csv', 0x20000001, self.mtp_invalidate, self.donothing, 0),
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self.test_BIP('csv', 0x20000001, self.donothing, self.csv_invalidate, 0)
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):
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yield test
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def donothing(self, tx):
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return
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def csv_invalidate(self, tx):
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"""Modify the signature in vin 0 of the tx to fail CSV
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Prepends -1 CSV DROP in the scriptSig itself.
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"""
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tx.vin[0].scriptSig = CScript([OP_1NEGATE, OP_CHECKSEQUENCEVERIFY, OP_DROP] +
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list(CScript(tx.vin[0].scriptSig)))
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def sequence_lock_invalidate(self, tx):
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"""Modify the nSequence to make it fails once sequence lock rule is
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activated (high timespan).
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"""
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tx.vin[0].nSequence = 0x00FFFFFF
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tx.nLockTime = 0
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def mtp_invalidate(self, tx):
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"""Modify the nLockTime to make it fails once MTP rule is activated."""
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# Disable Sequence lock, Activate nLockTime
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tx.vin[0].nSequence = 0x90FFFFFF
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tx.nLockTime = self.last_block_time
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if __name__ == '__main__':
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BIP9SoftForksTest().main()
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