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e9e9391083
assumevalid.py would try to send over a closed P2P connection in a loop, hitting the following failure many times: TestFramework.mininode (ERROR): Cannot send message. No connection to node! The test still passes, but this is a lot of noise in the test log. Just check that the connection is open before trying to send.
203 lines
8.2 KiB
Python
Executable File
203 lines
8.2 KiB
Python
Executable File
#!/usr/bin/env python3
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# Copyright (c) 2014-2016 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 logic for skipping signature validation on old blocks.
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Test logic for skipping signature validation on blocks which we've assumed
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valid (https://github.com/bitcoin/bitcoin/pull/9484)
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We build a chain that includes and invalid signature for one of the
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transactions:
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0: genesis block
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1: block 1 with coinbase transaction output.
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2-101: bury that block with 100 blocks so the coinbase transaction
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output can be spent
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102: a block containing a transaction spending the coinbase
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transaction output. The transaction has an invalid signature.
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103-2202: bury the bad block with just over two weeks' worth of blocks
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(2100 blocks)
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Start three nodes:
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- node0 has no -assumevalid parameter. Try to sync to block 2202. It will
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reject block 102 and only sync as far as block 101
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- node1 has -assumevalid set to the hash of block 102. Try to sync to
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block 2202. node1 will sync all the way to block 2202.
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- node2 has -assumevalid set to the hash of block 102. Try to sync to
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block 200. node2 will reject block 102 since it's assumed valid, but it
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isn't buried by at least two weeks' work.
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"""
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import time
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from test_framework.blocktools import (create_block, create_coinbase)
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from test_framework.key import CECKey
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from test_framework.mininode import (CBlockHeader,
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COutPoint,
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CTransaction,
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CTxIn,
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CTxOut,
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NetworkThread,
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NodeConn,
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NodeConnCB,
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msg_block,
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msg_headers)
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from test_framework.script import (CScript, OP_TRUE)
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from test_framework.test_framework import BitcoinTestFramework
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from test_framework.util import (p2p_port, assert_equal)
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class BaseNode(NodeConnCB):
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def send_header_for_blocks(self, new_blocks):
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headers_message = msg_headers()
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headers_message.headers = [CBlockHeader(b) for b in new_blocks]
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self.send_message(headers_message)
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class AssumeValidTest(BitcoinTestFramework):
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def set_test_params(self):
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self.setup_clean_chain = True
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self.num_nodes = 3
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def setup_network(self):
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self.add_nodes(3)
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# Start node0. We don't start the other nodes yet since
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# we need to pre-mine a block with an invalid transaction
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# signature so we can pass in the block hash as assumevalid.
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self.start_node(0)
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def send_blocks_until_disconnected(self, node):
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"""Keep sending blocks to the node until we're disconnected."""
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for i in range(len(self.blocks)):
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if not node.connection:
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break
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try:
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node.send_message(msg_block(self.blocks[i]))
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except IOError as e:
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assert str(e) == 'Not connected, no pushbuf'
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break
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def assert_blockchain_height(self, node, height):
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"""Wait until the blockchain is no longer advancing and verify it's reached the expected height."""
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last_height = node.getblock(node.getbestblockhash())['height']
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timeout = 10
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while True:
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time.sleep(0.25)
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current_height = node.getblock(node.getbestblockhash())['height']
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if current_height != last_height:
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last_height = current_height
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if timeout < 0:
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assert False, "blockchain too short after timeout: %d" % current_height
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timeout - 0.25
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continue
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elif current_height > height:
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assert False, "blockchain too long: %d" % current_height
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elif current_height == height:
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break
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def run_test(self):
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# Connect to node0
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node0 = BaseNode()
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connections = []
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connections.append(NodeConn('127.0.0.1', p2p_port(0), self.nodes[0], node0))
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node0.add_connection(connections[0])
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NetworkThread().start() # Start up network handling in another thread
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node0.wait_for_verack()
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# Build the blockchain
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self.tip = int(self.nodes[0].getbestblockhash(), 16)
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self.block_time = self.nodes[0].getblock(self.nodes[0].getbestblockhash())['time'] + 1
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self.blocks = []
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# Get a pubkey for the coinbase TXO
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coinbase_key = CECKey()
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coinbase_key.set_secretbytes(b"horsebattery")
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coinbase_pubkey = coinbase_key.get_pubkey()
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# Create the first block with a coinbase output to our key
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height = 1
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block = create_block(self.tip, create_coinbase(height, coinbase_pubkey), self.block_time)
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self.blocks.append(block)
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self.block_time += 1
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block.solve()
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# Save the coinbase for later
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self.block1 = block
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self.tip = block.sha256
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height += 1
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# Bury the block 100 deep so the coinbase output is spendable
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for i in range(100):
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block = create_block(self.tip, create_coinbase(height), self.block_time)
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block.solve()
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self.blocks.append(block)
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self.tip = block.sha256
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self.block_time += 1
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height += 1
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# Create a transaction spending the coinbase output with an invalid (null) signature
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tx = CTransaction()
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tx.vin.append(CTxIn(COutPoint(self.block1.vtx[0].sha256, 0), scriptSig=b""))
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tx.vout.append(CTxOut(49 * 100000000, CScript([OP_TRUE])))
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tx.calc_sha256()
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block102 = create_block(self.tip, create_coinbase(height), self.block_time)
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self.block_time += 1
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block102.vtx.extend([tx])
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block102.hashMerkleRoot = block102.calc_merkle_root()
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block102.rehash()
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block102.solve()
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self.blocks.append(block102)
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self.tip = block102.sha256
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self.block_time += 1
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height += 1
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# Bury the assumed valid block 2100 deep
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for i in range(2100):
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block = create_block(self.tip, create_coinbase(height), self.block_time)
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block.nVersion = 4
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block.solve()
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self.blocks.append(block)
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self.tip = block.sha256
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self.block_time += 1
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height += 1
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# Start node1 and node2 with assumevalid so they accept a block with a bad signature.
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self.start_node(1, extra_args=["-assumevalid=" + hex(block102.sha256)])
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node1 = BaseNode() # connects to node1
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connections.append(NodeConn('127.0.0.1', p2p_port(1), self.nodes[1], node1))
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node1.add_connection(connections[1])
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node1.wait_for_verack()
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self.start_node(2, extra_args=["-assumevalid=" + hex(block102.sha256)])
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node2 = BaseNode() # connects to node2
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connections.append(NodeConn('127.0.0.1', p2p_port(2), self.nodes[2], node2))
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node2.add_connection(connections[2])
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node2.wait_for_verack()
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# send header lists to all three nodes
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node0.send_header_for_blocks(self.blocks[0:2000])
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node0.send_header_for_blocks(self.blocks[2000:])
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node1.send_header_for_blocks(self.blocks[0:2000])
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node1.send_header_for_blocks(self.blocks[2000:])
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node2.send_header_for_blocks(self.blocks[0:200])
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# Send blocks to node0. Block 102 will be rejected.
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self.send_blocks_until_disconnected(node0)
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self.assert_blockchain_height(self.nodes[0], 101)
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# Send all blocks to node1. All blocks will be accepted.
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for i in range(2202):
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node1.send_message(msg_block(self.blocks[i]))
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# Syncing 2200 blocks can take a while on slow systems. Give it plenty of time to sync.
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node1.sync_with_ping(120)
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assert_equal(self.nodes[1].getblock(self.nodes[1].getbestblockhash())['height'], 2202)
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# Send blocks to node2. Block 102 will be rejected.
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self.send_blocks_until_disconnected(node2)
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self.assert_blockchain_height(self.nodes[2], 101)
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if __name__ == '__main__':
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AssumeValidTest().main()
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