You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
128 lines
4.7 KiB
128 lines
4.7 KiB
#!/usr/bin/env python3 |
|
# Copyright (c) 2015-2017 The Bitcoin Core developers |
|
# Distributed under the MIT software license, see the accompanying |
|
# file COPYING or http://www.opensource.org/licenses/mit-license.php. |
|
"""Test node responses to invalid blocks. |
|
|
|
In this test we connect to one node over p2p, and test block requests: |
|
1) Valid blocks should be requested and become chain tip. |
|
2) Invalid block with duplicated transaction should be re-requested. |
|
3) Invalid block with bad coinbase value should be rejected and not |
|
re-requested. |
|
""" |
|
|
|
from test_framework.test_framework import ComparisonTestFramework |
|
from test_framework.util import * |
|
from test_framework.comptool import TestManager, TestInstance, RejectResult |
|
from test_framework.blocktools import * |
|
from test_framework.mininode import network_thread_start |
|
import copy |
|
import time |
|
|
|
# Use the ComparisonTestFramework with 1 node: only use --testbinary. |
|
class InvalidBlockRequestTest(ComparisonTestFramework): |
|
|
|
''' Can either run this test as 1 node with expected answers, or two and compare them. |
|
Change the "outcome" variable from each TestInstance object to only do the comparison. ''' |
|
def set_test_params(self): |
|
self.num_nodes = 1 |
|
self.setup_clean_chain = True |
|
|
|
def run_test(self): |
|
test = TestManager(self, self.options.tmpdir) |
|
test.add_all_connections(self.nodes) |
|
self.tip = None |
|
self.block_time = None |
|
network_thread_start() |
|
test.run() |
|
|
|
def get_tests(self): |
|
if self.tip is None: |
|
self.tip = int("0x" + self.nodes[0].getbestblockhash(), 0) |
|
self.block_time = int(time.time())+1 |
|
|
|
''' |
|
Create a new block with an anyone-can-spend coinbase |
|
''' |
|
height = 1 |
|
block = create_block(self.tip, create_coinbase(height), self.block_time) |
|
self.block_time += 1 |
|
block.solve() |
|
# Save the coinbase for later |
|
self.block1 = block |
|
self.tip = block.sha256 |
|
height += 1 |
|
yield TestInstance([[block, True]]) |
|
|
|
''' |
|
Now we need that block to mature so we can spend the coinbase. |
|
''' |
|
test = TestInstance(sync_every_block=False) |
|
for i in range(100): |
|
block = create_block(self.tip, create_coinbase(height), self.block_time) |
|
block.solve() |
|
self.tip = block.sha256 |
|
self.block_time += 1 |
|
test.blocks_and_transactions.append([block, True]) |
|
height += 1 |
|
yield test |
|
|
|
''' |
|
Now we use merkle-root malleability to generate an invalid block with |
|
same blockheader. |
|
Manufacture a block with 3 transactions (coinbase, spend of prior |
|
coinbase, spend of that spend). Duplicate the 3rd transaction to |
|
leave merkle root and blockheader unchanged but invalidate the block. |
|
''' |
|
block2 = create_block(self.tip, create_coinbase(height), self.block_time) |
|
self.block_time += 1 |
|
|
|
# b'0x51' is OP_TRUE |
|
tx1 = create_transaction(self.block1.vtx[0], 0, b'\x51', 50 * COIN) |
|
tx2 = create_transaction(tx1, 0, b'\x51', 50 * COIN) |
|
|
|
block2.vtx.extend([tx1, tx2]) |
|
block2.hashMerkleRoot = block2.calc_merkle_root() |
|
block2.rehash() |
|
block2.solve() |
|
orig_hash = block2.sha256 |
|
block2_orig = copy.deepcopy(block2) |
|
|
|
# Mutate block 2 |
|
block2.vtx.append(tx2) |
|
assert_equal(block2.hashMerkleRoot, block2.calc_merkle_root()) |
|
assert_equal(orig_hash, block2.rehash()) |
|
assert(block2_orig.vtx != block2.vtx) |
|
|
|
self.tip = block2.sha256 |
|
yield TestInstance([[block2, RejectResult(16, b'bad-txns-duplicate')]]) |
|
|
|
# Check transactions for duplicate inputs |
|
self.log.info("Test duplicate input block.") |
|
|
|
block2_dup = copy.deepcopy(block2_orig) |
|
block2_dup.vtx[2].vin.append(block2_dup.vtx[2].vin[0]) |
|
block2_dup.vtx[2].rehash() |
|
block2_dup.hashMerkleRoot = block2_dup.calc_merkle_root() |
|
block2_dup.rehash() |
|
block2_dup.solve() |
|
yield TestInstance([[block2_dup, RejectResult(16, b'bad-txns-inputs-duplicate')], [block2_orig, True]]) |
|
height += 1 |
|
|
|
''' |
|
Make sure that a totally screwed up block is not valid. |
|
''' |
|
block3 = create_block(self.tip, create_coinbase(height), self.block_time) |
|
self.block_time += 1 |
|
block3.vtx[0].vout[0].nValue = 100 * COIN # Too high! |
|
block3.vtx[0].sha256=None |
|
block3.vtx[0].calc_sha256() |
|
block3.hashMerkleRoot = block3.calc_merkle_root() |
|
block3.rehash() |
|
block3.solve() |
|
|
|
yield TestInstance([[block3, RejectResult(16, b'bad-cb-amount')]]) |
|
|
|
|
|
if __name__ == '__main__': |
|
InvalidBlockRequestTest().main()
|
|
|