add test to analyse v2 tx traffic

Author: stratospher

test/functional/p2p_v2_tx_traffic.py

@@ -0,0 +1,63 @@
+#!/usr/bin/env python3
+# Copyright (c) 2022 The Bitcoin Core developers
+# Distributed under the MIT software license, see the accompanying
+# file COPYING or http://www.opensource.org/licenses/mit-license.php.
+"""
+See traffic patterns in v2 traffic
+
+node0 <--- node1 <--- node2
+
+Can we see tx created by node3 propagating from node3 to node0?
+"""
+from test_framework.blocktools import (
+    COINBASE_MATURITY,
+)
+from test_framework.p2p import (
+    P2PInterface,
+)
+from test_framework.test_framework import BitcoinTestFramework
+from test_framework.util import (
+    assert_equal,
+)
+
+class P2PTraffic(BitcoinTestFramework):
+    def set_test_params(self):
+        self.num_nodes = 3
+        self.extra_args = [["-v2transport=1"], ["-v2transport=1"], ["-v2transport=1"]]
+
+    def add_options(self, parser):
+        self.add_wallet_options(parser)
+
+    def run_test(self):
+        node0, node1, node2 = self.nodes[0], self.nodes[1], self.nodes[2]
+        peer = node0.add_p2p_connection(P2PInterface(), wait_for_verack=True, supports_v2_p2p=True)
+        assert peer.supports_v2_p2p
+        # 1. node2 creates a transaction
+        node2.createwallet(wallet_name='test')
+        test_wallet = node2.get_wallet_rpc('test')
+
+        self.generatetoaddress(node2, COINBASE_MATURITY + 1, test_wallet.getnewaddress())
+
+        address1 = test_wallet.getnewaddress()
+        txid = node2.sendtoaddress(address=address1, amount=1)
+
+        # 2. wait for node0's peer to receive transaction
+        peer.wait_for_tx(txid)
+
+        # 1. node2 creates a transaction
+
+        # self.generatetoaddress(node2, COINBASE_MATURITY + 1, test_wallet.getnewaddress())
+        address2 = test_wallet.getnewaddress()
+        txid = node2.sendtoaddress(address=address2, amount=1)
+
+        # 2. wait for node0's peer to receive transaction
+        peer.wait_for_tx(txid)
+
+        # can you see fixed size transaction msg moving?
+        # what are other msg types + sizes you see?
+        assert False
+
+
+
+if __name__ == '__main__':
+    P2PTraffic().main()