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#!/usr/bin/env python3
# Copyright (c) 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.
from test_framework.messages import CInv, msg_getdata
from test_framework.mininode import NODE_BLOOM, NODE_NETWORK_LIMITED, NODE_WITNESS, NetworkThread, P2PInterface
from test_framework.test_framework import BitcoinTestFramework
from test_framework.util import assert_equal
class P2PIgnoreInv(P2PInterface):
def on_inv(self, message):
# The node will send us invs for other blocks. Ignore them.
pass
class NodeNetworkLimitedTest(BitcoinTestFramework):
def set_test_params(self):
self.setup_clean_chain = True
self.num_nodes = 1
self.extra_args = [['-prune=550']]
def get_signalled_service_flags(self):
node = self.nodes[0].add_p2p_connection(P2PIgnoreInv())
NetworkThread().start()
node.wait_for_verack()
services = node.nServices
self.nodes[0].disconnect_p2ps()
node.wait_for_disconnect()
return services
def try_get_block_via_getdata(self, blockhash, must_disconnect):
node = self.nodes[0].add_p2p_connection(P2PIgnoreInv())
NetworkThread().start()
node.wait_for_verack()
getdata_request = msg_getdata()
getdata_request.inv.append(CInv(2, int(blockhash, 16)))
node.send_message(getdata_request)
if (must_disconnect):
# Ensure we get disconnected
node.wait_for_disconnect(5)
else:
# check if the peer sends us the requested block
node.wait_for_block(int(blockhash, 16), 3)
self.nodes[0].disconnect_p2ps()
node.wait_for_disconnect()
def run_test(self):
# NODE_BLOOM & NODE_WITNESS & NODE_NETWORK_LIMITED must now be signaled
assert_equal(self.get_signalled_service_flags(), NODE_BLOOM | NODE_WITNESS | NODE_NETWORK_LIMITED)
# Now mine some blocks over the NODE_NETWORK_LIMITED + 2(racy buffer ext.) target
firstblock = self.nodes[0].generate(1)[0]
blocks = self.nodes[0].generate(292)
block_within_limited_range = blocks[-1]
# Make sure we can max retrive block at tip-288
# requesting block at height 2 (tip-289) must fail (ignored)
self.try_get_block_via_getdata(firstblock, True) # first block must lead to disconnect
self.try_get_block_via_getdata(blocks[1], False) # last block in valid range
self.try_get_block_via_getdata(blocks[0], True) # first block outside of the 288+2 limit
# NODE_NETWORK_LIMITED must still be signaled after restart
self.restart_node(0)
assert_equal(self.get_signalled_service_flags(), NODE_BLOOM | NODE_WITNESS | NODE_NETWORK_LIMITED)
# Test the RPC service flags
assert_equal(int(self.nodes[0].getnetworkinfo()['localservices'], 16), NODE_BLOOM | NODE_WITNESS | NODE_NETWORK_LIMITED)
# getdata a block above the NODE_NETWORK_LIMITED threshold must be possible
self.try_get_block_via_getdata(block_within_limited_range, False)
# getdata a block below the NODE_NETWORK_LIMITED threshold must be ignored
self.try_get_block_via_getdata(firstblock, True)
if __name__ == '__main__':
NodeNetworkLimitedTest().main()
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