#!/usr/bin/env python3 # Copyright (c) 2019-2020 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 p2p blocksonly mode & block-relay-only connections.""" import time from test_framework.messages import msg_tx from test_framework.p2p import P2PInterface, P2PTxInvStore from test_framework.test_framework import BitcoinTestFramework from test_framework.util import assert_equal from test_framework.wallet import MiniWallet class P2PBlocksOnly(BitcoinTestFramework): def set_test_params(self): self.setup_clean_chain = True self.num_nodes = 1 self.extra_args = [["-blocksonly"]] def run_test(self): self.miniwallet = MiniWallet(self.nodes[0]) # Add enough mature utxos to the wallet, so that all txs spend confirmed coins self.miniwallet.generate(2) self.nodes[0].generate(100) self.blocksonly_mode_tests() self.blocks_relay_conn_tests() def blocksonly_mode_tests(self): self.log.info("Tests with node running in -blocksonly mode") assert_equal(self.nodes[0].getnetworkinfo()['localrelay'], False) self.nodes[0].add_p2p_connection(P2PInterface()) tx, txid, wtxid, tx_hex = self.check_p2p_tx_violation() self.log.info('Check that txs from rpc are not rejected and relayed to other peers') tx_relay_peer = self.nodes[0].add_p2p_connection(P2PInterface()) assert_equal(self.nodes[0].getpeerinfo()[0]['relaytxes'], True) assert_equal(self.nodes[0].testmempoolaccept([tx_hex])[0]['allowed'], True) with self.nodes[0].assert_debug_log(['received getdata for: wtx {} peer=1'.format(wtxid)]): self.nodes[0].sendrawtransaction(tx_hex) tx_relay_peer.wait_for_tx(txid) assert_equal(self.nodes[0].getmempoolinfo()['size'], 1) self.log.info("Restarting node 0 with relay permission and blocksonly") self.restart_node(0, ["-persistmempool=0", "-whitelist=relay@127.0.0.1", "-blocksonly"]) assert_equal(self.nodes[0].getrawmempool(), []) first_peer = self.nodes[0].add_p2p_connection(P2PInterface()) second_peer = self.nodes[0].add_p2p_connection(P2PInterface()) peer_1_info = self.nodes[0].getpeerinfo()[0] assert_equal(peer_1_info['permissions'], ['relay']) peer_2_info = self.nodes[0].getpeerinfo()[1] assert_equal(peer_2_info['permissions'], ['relay']) assert_equal(self.nodes[0].testmempoolaccept([tx_hex])[0]['allowed'], True) self.log.info('Check that the tx from first_peer with relay-permission is relayed to others (ie.second_peer)') with self.nodes[0].assert_debug_log(["received getdata"]): # Note that normally, first_peer would never send us transactions since we're a blocksonly node. # By activating blocksonly, we explicitly tell our peers that they should not send us transactions, # and Bitcoin Core respects that choice and will not send transactions. # But if, for some reason, first_peer decides to relay transactions to us anyway, we should relay them to # second_peer since we gave relay permission to first_peer. # See https://github.com/bitcoin/bitcoin/issues/19943 for details. first_peer.send_message(msg_tx(tx)) self.log.info('Check that the peer with relay-permission is still connected after sending the transaction') assert_equal(first_peer.is_connected, True) second_peer.wait_for_tx(txid) assert_equal(self.nodes[0].getmempoolinfo()['size'], 1) self.log.info("Relay-permission peer's transaction is accepted and relayed") self.nodes[0].disconnect_p2ps() self.nodes[0].generate(1) def blocks_relay_conn_tests(self): self.log.info('Tests with node in normal mode with block-relay-only connections') self.restart_node(0, ["-noblocksonly"]) # disables blocks only mode assert_equal(self.nodes[0].getnetworkinfo()['localrelay'], True) # Ensure we disconnect if a block-relay-only connection sends us a transaction self.nodes[0].add_outbound_p2p_connection(P2PInterface(), p2p_idx=0, connection_type="block-relay-only") assert_equal(self.nodes[0].getpeerinfo()[0]['relaytxes'], False) _, txid, _, tx_hex = self.check_p2p_tx_violation(index=2) self.log.info("Check that txs from RPC are not sent to blockrelay connection") conn = self.nodes[0].add_outbound_p2p_connection(P2PTxInvStore(), p2p_idx=1, connection_type="block-relay-only") self.nodes[0].sendrawtransaction(tx_hex) # Bump time forward to ensure nNextInvSend timer pops self.nodes[0].setmocktime(int(time.time()) + 60) conn.sync_send_with_ping() assert(int(txid, 16) not in conn.get_invs()) def check_p2p_tx_violation(self, index=1): self.log.info('Check that txs from P2P are rejected and result in disconnect') input_txid = self.nodes[0].getblock(self.nodes[0].getblockhash(index), 2)['tx'][0]['txid'] utxo_to_spend = self.miniwallet.get_utxo(txid=input_txid) spendtx = self.miniwallet.create_self_transfer(from_node=self.nodes[0], utxo_to_spend=utxo_to_spend) with self.nodes[0].assert_debug_log(['transaction sent in violation of protocol peer=0']): self.nodes[0].p2ps[0].send_message(msg_tx(spendtx['tx'])) self.nodes[0].p2ps[0].wait_for_disconnect() assert_equal(self.nodes[0].getmempoolinfo()['size'], 0) # Remove the disconnected peer del self.nodes[0].p2ps[0] return spendtx['tx'], spendtx['txid'], spendtx['wtxid'], spendtx['hex'] if __name__ == '__main__': P2PBlocksOnly().main()