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7b5e3fe0cc
Adds a qa testcase testing the new "-assumevalid" option. The testcase builds a chain that includes and invalid signature for one of the transactions and sends that chain to three nodes: - node0 has no -assumevalid parameter and rejects the invalid chain. - node1 has -assumevalid set and accepts the invalid chain. - node2 has -assumevalid set but the invalid block is not buried deep enough to assume invalid, and so rejects the invalid chain.
192 lines
7.6 KiB
Python
Executable File
192 lines
7.6 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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'''
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assumevalid.py
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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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from test_framework.mininode import *
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from test_framework.test_framework import BitcoinTestFramework
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from test_framework.util import *
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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.script import *
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class BaseNode(SingleNodeConnCB):
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def __init__(self):
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SingleNodeConnCB.__init__(self)
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self.last_inv = None
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self.last_headers = None
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self.last_block = None
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self.last_getdata = None
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self.block_announced = False
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self.last_getheaders = None
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self.disconnected = False
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self.last_blockhash_announced = None
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def on_close(self, conn):
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self.disconnected = True
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def wait_for_disconnect(self, timeout=60):
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test_function = lambda: self.disconnected
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assert(wait_until(test_function, timeout=timeout))
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return
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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 SendHeadersTest(BitcoinTestFramework):
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def __init__(self):
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super().__init__()
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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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# 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.nodes = []
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self.nodes.append(start_node(0, self.options.tmpdir, ["-debug"]))
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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.nodes.append(start_node(1, self.options.tmpdir,
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["-debug", "-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.nodes.append(start_node(2, self.options.tmpdir,
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["-debug", "-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 102 blocks to node0. Block 102 will be rejected.
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for i in range(101):
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node0.send_message(msg_block(self.blocks[i]))
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node0.sync_with_ping() # make sure the most recent block is synced
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node0.send_message(msg_block(self.blocks[101]))
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assert_equal(self.nodes[0].getblock(self.nodes[0].getbestblockhash())['height'], 101)
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# Send 3102 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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node1.sync_with_ping() # make sure the most recent block is synced
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assert_equal(self.nodes[1].getblock(self.nodes[1].getbestblockhash())['height'], 2202)
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# Send 102 blocks to node2. Block 102 will be rejected.
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for i in range(101):
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node2.send_message(msg_block(self.blocks[i]))
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node2.sync_with_ping() # make sure the most recent block is synced
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node2.send_message(msg_block(self.blocks[101]))
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assert_equal(self.nodes[2].getblock(self.nodes[2].getbestblockhash())['height'], 101)
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if __name__ == '__main__':
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SendHeadersTest().main()
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