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#!/usr/bin/env python3
# Copyright (c) 2021 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 compact blocks HB selection logic."""
from test_framework.test_framework import BitcoinTestFramework
from test_framework.util import assert_equal
class CompactBlocksConnectionTest(BitcoinTestFramework):
"""Test class for verifying selection of HB peer connections."""
def set_test_params(self):
self.setup_clean_chain = True
self.num_nodes = 6
def peer_info(self, from_node, to_node):
"""Query from_node for its getpeerinfo about to_node."""
for peerinfo in self.nodes[from_node].getpeerinfo():
if "(testnode%i)" % to_node in peerinfo['subver']:
return peerinfo
return None
def setup_network(self):
self.setup_nodes()
# Start network with everyone disconnected
self.sync_all()
def relay_block_through(self, peer):
"""Relay a new block through peer peer, and return HB status between 1 and [2,3,4,5]."""
self.connect_nodes(peer, 0)
self.generate(self.nodes[0], 1)
self.disconnect_nodes(peer, 0)
status_to = [self.peer_info(1, i)['bip152_hb_to'] for i in range(2, 6)]
status_from = [self.peer_info(i, 1)['bip152_hb_from'] for i in range(2, 6)]
assert_equal(status_to, status_from)
return status_to
def run_test(self):
self.log.info("Testing reserved high-bandwidth mode slot for outbound peer...")
# Connect everyone to node 0, and mine some blocks to get all nodes out of IBD.
for i in range(1, 6):
self.connect_nodes(i, 0)
self.generate(self.nodes[0], 2)
for i in range(1, 6):
self.disconnect_nodes(i, 0)
# Construct network topology:
# - Node 0 is the block producer
# - Node 1 is the "target" node being tested
# - Nodes 2-5 are intermediaries.
# - Node 1 has an outbound connection to node 2
# - Node 1 has inbound connections from nodes 3-5
self.connect_nodes(3, 1)
self.connect_nodes(4, 1)
self.connect_nodes(5, 1)
self.connect_nodes(1, 2)
# Mine blocks subsequently relaying through nodes 3,4,5 (inbound to node 1)
for nodeid in range(3, 6):
status = self.relay_block_through(nodeid)
assert_equal(status, [False, nodeid >= 3, nodeid >= 4, nodeid >= 5])
# And again through each. This should not change HB status.
for nodeid in range(3, 6):
status = self.relay_block_through(nodeid)
assert_equal(status, [False, True, True, True])
# Now relay one block through peer 2 (outbound from node 1), so it should take HB status
# from one of the inbounds.
status = self.relay_block_through(2)
assert_equal(status[0], True)
assert_equal(sum(status), 3)
# Now relay again through nodes 3,4,5. Since 2 is outbound, it should remain HB.
for nodeid in range(3, 6):
status = self.relay_block_through(nodeid)
assert status[0]
assert status[nodeid - 2]
assert_equal(sum(status), 3)
# Reconnect peer 2, and retry. Now the three inbounds should be HB again.
self.disconnect_nodes(1, 2)
self.connect_nodes(1, 2)
for nodeid in range(3, 6):
status = self.relay_block_through(nodeid)
assert not status[0]
assert status[nodeid - 2]
assert_equal(status, [False, True, True, True])
if __name__ == '__main__':
CompactBlocksConnectionTest().main()
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