test: ensure I2P addresses are relayed

This test would fail if `CNetAddr::IsRelayable()` returns `false` for
I2P addresses, given that this test node does not have I2P connectivity.

Author: vasild

test/functional/p2p_addrv2_relay.py

@@ -18,12 +18,19 @@
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import assert_equal
 
+I2P_ADDR = "c4gfnttsuwqomiygupdqqqyy5y5emnk5c73hrfvatri67prd7vyq.b32.i2p"
+
 ADDRS = []
 for i in range(10):
     addr = CAddress()
     addr.time = int(time.time()) + i
     addr.nServices = NODE_NETWORK | NODE_WITNESS
-    addr.ip = "123.123.123.{}".format(i % 256)
+    # Add one I2P address at an arbitrary position.
+    if i == 5:
+        addr.net = addr.NET_I2P
+        addr.ip = I2P_ADDR
+    else:
+        addr.ip = f"123.123.123.{i % 256}"
     addr.port = 8333 + i
     ADDRS.append(addr)
 
@@ -35,11 +42,8 @@ def __init__(self):
         super().__init__(support_addrv2 = True)
 
     def on_addrv2(self, message):
-        for addr in message.addrs:
-            assert_equal(addr.nServices, NODE_NETWORK | NODE_WITNESS)
-            assert addr.ip.startswith('123.123.123.')
-            assert (8333 <= addr.port < 8343)
-        self.addrv2_received_and_checked = True
+        if ADDRS == message.addrs:
+            self.addrv2_received_and_checked = True
 
     def wait_for_addrv2(self):
         self.wait_until(lambda: "addrv2" in self.last_message)
@@ -64,15 +68,18 @@ def run_test(self):
         addr_receiver = self.nodes[0].add_p2p_connection(AddrReceiver())
         msg.addrs = ADDRS
         with self.nodes[0].assert_debug_log([
-                'Added 10 addresses from 127.0.0.1: 0 tried',
-                'received: addrv2 (131 bytes) peer=0',
-                'sending addrv2 (131 bytes) peer=1',
+                # The I2P address is not added to node's own addrman because it has no
+                # I2P reachability (thus 10 - 1 = 9).
+                'Added 9 addresses from 127.0.0.1: 0 tried',
+                'received: addrv2 (159 bytes) peer=0',
+                'sending addrv2 (159 bytes) peer=1',
         ]):
             addr_source.send_and_ping(msg)
             self.nodes[0].setmocktime(int(time.time()) + 30 * 60)
             addr_receiver.wait_for_addrv2()
 
         assert addr_receiver.addrv2_received_and_checked
+        assert_equal(len(self.nodes[0].getnodeaddresses(count=0, network="i2p")), 0)
 
 
 if __name__ == '__main__':