def run_test(self):
node0 = self.nodes[0].add_p2p_connection(P2PInterface())
# Set node time to 60 days ago
self.nodes[0].setmocktime(int(time.time()) - 60 * 24 * 60 * 60)
# Generating a chain of 10 blocks
block_hashes = self.nodes[0].generatetoaddress(
10, self.nodes[0].get_deterministic_priv_key().address)
# Create longer chain starting 2 blocks before current tip
height = len(block_hashes) - 2
block_hash = block_hashes[height - 1]
block_time = self.nodes[0].getblockheader(block_hash)["mediantime"] + 1
new_blocks = self.build_chain(5, block_hash, height, block_time)
# Force reorg to a longer chain
node0.send_message(msg_headers(new_blocks))
node0.wait_for_getdata([x.sha256 for x in new_blocks])
for block in new_blocks:
node0.send_and_ping(msg_block(block))
# Check that reorg succeeded
assert_equal(self.nodes[0].getblockcount(), 13)
stale_hash = int(block_hashes[-1], 16)
# Check that getdata request for stale block succeeds
self.send_block_request(stale_hash, node0)
node0.wait_for_block(stale_hash, timeout=3)
# Check that getheader request for stale block header succeeds
self.send_header_request(stale_hash, node0)
node0.wait_for_header(hex(stale_hash), timeout=3)
# Longest chain is extended so stale is much older than chain tip
self.nodes[0].setmocktime(0)
block_hash = int(
self.nodes[0].generatetoaddress(
1, self.nodes[0].get_deterministic_priv_key().address)[-1], 16)
assert_equal(self.nodes[0].getblockcount(), 14)
node0.wait_for_block(block_hash, timeout=3)
# Request for very old stale block should now fail
with p2p_lock:
node0.last_message.pop("block", None)
self.send_block_request(stale_hash, node0)
node0.sync_with_ping()
assert "block" not in node0.last_message
# Request for very old stale block header should now fail
with p2p_lock:
node0.last_message.pop("headers", None)
self.send_header_request(stale_hash, node0)
node0.sync_with_ping()
assert "headers" not in node0.last_message
# Verify we can fetch very old blocks and headers on the active chain
block_hash = int(block_hashes[2], 16)
self.send_block_request(block_hash, node0)
self.send_header_request(block_hash, node0)
node0.sync_with_ping()
self.send_block_request(block_hash, node0)
node0.wait_for_block(block_hash, timeout=3)
self.send_header_request(block_hash, node0)
node0.wait_for_header(hex(block_hash), timeout=3)
def send_header_for_blocks(self, new_blocks):
headers_message = msg_headers()
headers_message.headers = [CBlockHeader(b) for b in new_blocks]
self.send_message(headers_message)
def run_test(self):
self.log.info("Read headers data")
self.headers_file_path = os.path.join(
os.path.dirname(os.path.realpath(__file__)), self.options.datafile)
with open(self.headers_file_path, encoding='utf-8') as headers_data:
h_lines = [l.strip() for l in headers_data.readlines()]
# The headers data is taken from testnet3 for early blocks from genesis until the first checkpoint. There are
# two headers with valid POW at height 1 and 2, forking off from genesis. They are indicated by the FORK_PREFIX.
FORK_PREFIX = 'fork:'
self.headers = [l for l in h_lines if not l.startswith(FORK_PREFIX)]
self.headers_fork = [
l[len(FORK_PREFIX):] for l in h_lines if l.startswith(FORK_PREFIX)
]
self.headers = [FromHex(CBlockHeader(), h) for h in self.headers]
self.headers_fork = [
FromHex(CBlockHeader(), h) for h in self.headers_fork
]
self.log.info(
"Feed all non-fork headers, including and up to the first checkpoint"
)
peer_checkpoint = self.nodes[0].add_p2p_connection(P2PInterface())
peer_checkpoint.send_and_ping(msg_headers(self.headers))
assert {
'height': 546,
'hash':
'000000002a936ca763904c3c35fce2f3556c559c0214345d31b1bcebf76acb70',
'branchlen': 546,
'status': 'headers-only',
} in self.nodes[0].getchaintips()
self.log.info("Feed all fork headers (fails due to checkpoint)")
with self.nodes[0].assert_debug_log(['bad-fork-prior-to-checkpoint']):
peer_checkpoint.send_message(msg_headers(self.headers_fork))
peer_checkpoint.wait_for_disconnect()
self.log.info("Feed all fork headers (succeeds without checkpoint)")
# On node 0 it succeeds because checkpoints are disabled
self.restart_node(0, extra_args=['-nocheckpoints'])
peer_no_checkpoint = self.nodes[0].add_p2p_connection(P2PInterface())
peer_no_checkpoint.send_and_ping(msg_headers(self.headers_fork))
assert {
"height": 2,
"hash":
"00000000b0494bd6c3d5ff79c497cfce40831871cbf39b1bc28bd1dac817dc39",
"branchlen": 2,
"status": "headers-only",
} in self.nodes[0].getchaintips()
# On node 1 it succeeds because no checkpoint has been reached yet by a chain tip
peer_before_checkpoint = self.nodes[1].add_p2p_connection(
P2PInterface())
peer_before_checkpoint.send_and_ping(msg_headers(self.headers_fork))
assert {
"height": 2,
"hash":
"00000000b0494bd6c3d5ff79c497cfce40831871cbf39b1bc28bd1dac817dc39",
"branchlen": 2,
"status": "headers-only",
} in self.nodes[1].getchaintips()
