240 lines
9.8 KiB
Python
Executable file
240 lines
9.8 KiB
Python
Executable file
#!/usr/bin/env python3
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# Copyright (c) 2015 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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from test_framework.blockstore import BlockStore
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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, NetworkThread
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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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from io import BytesIO
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import time
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import itertools
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'''
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This test is meant to exercise BIP 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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class BIP9SoftForksTest(ComparisonTestFramework):
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def __init__(self):
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super().__init__()
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self.num_nodes = 1
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def setup_network(self):
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self.nodes = start_nodes(self.num_nodes, self.options.tmpdir,
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extra_args=[['-debug', '-whitelist=127.0.0.1']],
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binary=[self.options.testbinary])
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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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NetworkThread().start() # Start up network handling in another thread
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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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# 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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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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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 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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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(58, 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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assert_equal(self.get_bip9_status(bipName)['status'], 'locked_in')
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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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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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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.block_store.close()
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stop_nodes(self.nodes)
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wait_bitcoinds()
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shutil.rmtree(self.options.tmpdir)
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self.setup_chain()
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self.setup_network()
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self.test.block_store = BlockStore(self.options.tmpdir)
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self.test.clear_all_connections()
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self.test.add_all_connections(self.nodes)
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NetworkThread().start() # Start up network handling in another thread
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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 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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'''
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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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