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c02337e1b0
fa87da2f172ae2e6dc15e9ed156a3564a8ecfbdd qa: Avoid start/stop of the network thread mid-test (MarcoFalke) Pull request description: This simplifies test writing by removing the need to handle the network thread in tests. E.g. start thread, join thread, restart thread mid-test, adding p2p connections at the "right" time, ... Tree-SHA512: 533642f12fef5496f1933855edcdab1a7ed901d088d34911749cd0f9e044c8a6cb1f89985ac3a7f41a512943663e4e270a61978f6f072143ae050cd102d4eab8
100 lines
3.7 KiB
Python
Executable File
100 lines
3.7 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 node responses to invalid blocks.
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In this test we connect to one node over p2p, and test block requests:
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1) Valid blocks should be requested and become chain tip.
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2) Invalid block with duplicated transaction should be re-requested.
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3) Invalid block with bad coinbase value should be rejected and not
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re-requested.
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"""
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import copy
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from test_framework.blocktools import create_block, create_coinbase, create_transaction
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from test_framework.mininode import P2PDataStore, COIN
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from test_framework.test_framework import BitcoinTestFramework
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from test_framework.util import assert_equal
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class InvalidBlockRequestTest(BitcoinTestFramework):
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def set_test_params(self):
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self.num_nodes = 1
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self.setup_clean_chain = True
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self.extra_args = [["-whitelist=127.0.0.1"]]
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def run_test(self):
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# Add p2p connection to node0
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node = self.nodes[0] # convenience reference to the node
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node.add_p2p_connection(P2PDataStore())
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node.p2p.wait_for_verack()
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best_block = node.getblock(node.getbestblockhash())
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tip = int(node.getbestblockhash(), 16)
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height = best_block["height"] + 1
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block_time = best_block["time"] + 1
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self.log.info("Create a new block with an anyone-can-spend coinbase")
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height = 1
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block = create_block(tip, create_coinbase(height), block_time)
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block.solve()
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# Save the coinbase for later
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block1 = block
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tip = block.sha256
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node.p2p.send_blocks_and_test([block1], node, True)
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self.log.info("Mature the block.")
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node.generate(100)
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best_block = node.getblock(node.getbestblockhash())
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tip = int(node.getbestblockhash(), 16)
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height = best_block["height"] + 1
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block_time = best_block["time"] + 1
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# Use merkle-root malleability to generate an invalid block with
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# same blockheader.
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# Manufacture a block with 3 transactions (coinbase, spend of prior
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# coinbase, spend of that spend). Duplicate the 3rd transaction to
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# leave merkle root and blockheader unchanged but invalidate the block.
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self.log.info("Test merkle root malleability.")
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block2 = create_block(tip, create_coinbase(height), block_time)
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block_time += 1
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# b'0x51' is OP_TRUE
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tx1 = create_transaction(block1.vtx[0], 0, b'\x51', 50 * COIN)
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tx2 = create_transaction(tx1, 0, b'\x51', 50 * COIN)
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block2.vtx.extend([tx1, tx2])
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block2.hashMerkleRoot = block2.calc_merkle_root()
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block2.rehash()
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block2.solve()
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orig_hash = block2.sha256
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block2_orig = copy.deepcopy(block2)
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# Mutate block 2
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block2.vtx.append(tx2)
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assert_equal(block2.hashMerkleRoot, block2.calc_merkle_root())
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assert_equal(orig_hash, block2.rehash())
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assert(block2_orig.vtx != block2.vtx)
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node.p2p.send_blocks_and_test([block2], node, False, False, 16, b'bad-txns-duplicate')
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self.log.info("Test very broken block.")
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block3 = create_block(tip, create_coinbase(height), block_time)
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block_time += 1
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block3.vtx[0].vout[0].nValue = 1000 * COIN # Too high!
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block3.vtx[0].sha256 = None
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block3.vtx[0].calc_sha256()
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block3.hashMerkleRoot = block3.calc_merkle_root()
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block3.rehash()
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block3.solve()
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node.p2p.send_blocks_and_test([block3], node, False, False, 16, b'bad-cb-amount')
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if __name__ == '__main__':
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InvalidBlockRequestTest().main()
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