#!/usr/bin/env python3 # Copyright (c) 2020 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 block-relay-only anchors functionality""" import os from test_framework.p2p import P2PInterface from test_framework.test_framework import BitcoinTestFramework from test_framework.util import assert_equal INBOUND_CONNECTIONS = 5 BLOCK_RELAY_CONNECTIONS = 2 def check_node_connections(*, node, num_in, num_out): info = node.getnetworkinfo() assert_equal(info["connections_in"], num_in) assert_equal(info["connections_out"], num_out) class AnchorsTest(BitcoinTestFramework): def set_test_params(self): self.num_nodes = 1 self.disable_autoconnect = False def setup_network(self): self.setup_nodes() def run_test(self): node_anchors_path = os.path.join( self.nodes[0].datadir, "regtest", "anchors.dat" ) self.log.info("When node starts, check if anchors.dat doesn't exist") assert not os.path.exists(node_anchors_path) self.log.info(f"Add {BLOCK_RELAY_CONNECTIONS} block-relay-only connections to node") for i in range(BLOCK_RELAY_CONNECTIONS): self.log.debug(f"block-relay-only: {i}") self.nodes[0].add_outbound_p2p_connection( P2PInterface(), p2p_idx=i, connection_type="block-relay-only" ) self.log.info(f"Add {INBOUND_CONNECTIONS} inbound connections to node") for i in range(INBOUND_CONNECTIONS): self.log.debug(f"inbound: {i}") self.nodes[0].add_p2p_connection(P2PInterface()) self.log.info("Check node connections") check_node_connections(node=self.nodes[0], num_in=5, num_out=2) # 127.0.0.1 ip = "7f000001" # Since the ip is always 127.0.0.1 for this case, # we store only the port to identify the peers block_relay_nodes_port = [] inbound_nodes_port = [] for p in self.nodes[0].getpeerinfo(): addr_split = p["addr"].split(":") if p["connection_type"] == "block-relay-only": block_relay_nodes_port.append(hex(int(addr_split[1]))[2:]) else: inbound_nodes_port.append(hex(int(addr_split[1]))[2:]) self.log.info("Stop node 0") self.stop_node(0) # It should contain only the block-relay-only addresses self.log.info("Check the addresses in anchors.dat") with open(node_anchors_path, "rb") as file_handler: anchors = file_handler.read().hex() for port in block_relay_nodes_port: ip_port = ip + port assert ip_port in anchors for port in inbound_nodes_port: ip_port = ip + port assert ip_port not in anchors self.log.info("Start node") self.start_node(0) self.log.info("When node starts, check if anchors.dat doesn't exist anymore") assert not os.path.exists(node_anchors_path) if __name__ == "__main__": AnchorsTest().main()