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#!/usr/bin/env python3
# Copyright (c) 2017-2021 The Bitcoin Core developers
# Distributed under the MIT software license, see the accompanying
# file COPYING or http://www.opensource.org/licenses/mit-license.php.
"""Tests NODE_NETWORK_LIMITED.
Tests that a node configured with -prune=550 signals NODE_NETWORK_LIMITED correctly
and that it responds to getdata requests for blocks correctly:
- send a block within 288 + 2 of the tip
- disconnect peers who request blocks older than that."""
from test_framework.messages import CInv, MSG_BLOCK, msg_getdata, msg_verack, NODE_NETWORK_LIMITED, NODE_WITNESS
from test_framework.p2p import P2PInterface
from test_framework.test_framework import BitcoinTestFramework
from test_framework.util import (
assert_equal,
)
class P2PIgnoreInv(P2PInterface):
firstAddrnServices = 0
def on_inv(self, message):
# The node will send us invs for other blocks. Ignore them.
pass
def on_addr(self, message):
self.firstAddrnServices = message.addrs[0].nServices
def wait_for_addr(self, timeout=5):
test_function = lambda: self.last_message.get("addr")
self.wait_until(test_function, timeout=timeout)
def send_getdata_for_block(self, blockhash):
getdata_request = msg_getdata()
getdata_request.inv.append(CInv(MSG_BLOCK, int(blockhash, 16)))
self.send_message(getdata_request)
class NodeNetworkLimitedTest(BitcoinTestFramework):
def set_test_params(self):
self.setup_clean_chain = True
self.num_nodes = 3
self.extra_args = [['-prune=550', '-addrmantest'], [], []]
def disconnect_all(self):
self.disconnect_nodes(0, 1)
self.disconnect_nodes(0, 2)
self.disconnect_nodes(1, 2)
def setup_network(self):
self.add_nodes(self.num_nodes, self.extra_args)
self.start_nodes()
def run_test(self):
node = self.nodes[0].add_p2p_connection(P2PIgnoreInv())
expected_services = NODE_WITNESS | NODE_NETWORK_LIMITED
self.log.info("Check that node has signalled expected services.")
assert_equal(node.nServices, expected_services)
self.log.info("Check that the localservices is as expected.")
assert_equal(int(self.nodes[0].getnetworkinfo()['localservices'], 16), expected_services)
self.log.info("Mine enough blocks to reach the NODE_NETWORK_LIMITED range.")
self.connect_nodes(0, 1)
blocks = self.generate(self.nodes[1], 292, sync_fun=lambda: self.sync_blocks([self.nodes[0], self.nodes[1]]))
self.log.info("Make sure we can max retrieve block at tip-288.")
node.send_getdata_for_block(blocks[1]) # last block in valid range
node.wait_for_block(int(blocks[1], 16), timeout=3)
self.log.info("Requesting block at height 2 (tip-289) must fail (ignored).")
node.send_getdata_for_block(blocks[0]) # first block outside of the 288+2 limit
node.wait_for_disconnect(5)
self.log.info("Check local address relay, do a fresh connection.")
self.nodes[0].disconnect_p2ps()
node1 = self.nodes[0].add_p2p_connection(P2PIgnoreInv())
node1.send_message(msg_verack())
node1.wait_for_addr()
#must relay address with NODE_NETWORK_LIMITED
assert_equal(node1.firstAddrnServices, expected_services)
self.nodes[0].disconnect_p2ps()
# connect unsynced node 2 with pruned NODE_NETWORK_LIMITED peer
# because node 2 is in IBD and node 0 is a NODE_NETWORK_LIMITED peer, sync must not be possible
self.connect_nodes(0, 2)
try:
self.sync_blocks([self.nodes[0], self.nodes[2]], timeout=5)
except:
pass
# node2 must remain at height 0
assert_equal(self.nodes[2].getblockheader(self.nodes[2].getbestblockhash())['height'], 0)
# now connect also to node 1 (non pruned)
self.connect_nodes(1, 2)
# sync must be possible
self.sync_blocks()
# disconnect all peers
self.disconnect_all()
# mine 10 blocks on node 0 (pruned node)
self.generate(self.nodes[0], 10, sync_fun=self.no_op)
# connect node1 (non pruned) with node0 (pruned) and check if the can sync
self.connect_nodes(0, 1)
# sync must be possible, node 1 is no longer in IBD and should therefore connect to node 0 (NODE_NETWORK_LIMITED)
self.sync_blocks([self.nodes[0], self.nodes[1]])
if __name__ == '__main__':
NodeNetworkLimitedTest().main()
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