rpc: add network field to rpc getnodeaddresses

doc/release-notes.md

@@ -126,6 +126,9 @@ Changes to Wallet or GUI related settings can be found in the GUI or Wallet sect
 
 - Passing an invalid `-rpcauth` argument now cause bitcoind to fail to start.  (#20461)
 
+- The `getnodeaddresses` RPC now returns a "network" field indicating the
+  network type (ipv4, ipv6, onion, or i2p) for each address.  (#21594)
+
 Tools and Utilities
 -------------------
 

src/rpc/net.cpp

@@ -848,6 +848,7 @@ static RPCHelpMan getnodeaddresses()
                             {RPCResult::Type::NUM, "services", "The services offered"},
                             {RPCResult::Type::STR, "address", "The address of the node"},
                             {RPCResult::Type::NUM, "port", "The port of the node"},
+                            {RPCResult::Type::STR, "network", "The network (" + Join(GetNetworkNames(), ", ") + ") the node connected through"},
                         }},
                     }
                 },
@@ -879,6 +880,7 @@ static RPCHelpMan getnodeaddresses()
         obj.pushKV("services", (uint64_t)addr.nServices);
         obj.pushKV("address", addr.ToStringIP());
         obj.pushKV("port", addr.GetPort());
+        obj.pushKV("network", GetNetworkName(addr.GetNetClass()));
         ret.push_back(obj);
     }
     return ret;

test/functional/rpc_net.py

@@ -195,7 +195,7 @@ class NetTest(BitcoinTestFramework):
         for i in range(10000):
             first_octet = i >> 8
             second_octet = i % 256
-            a = "{}.{}.1.1".format(first_octet, second_octet)
+            a = "{}.{}.1.1".format(first_octet, second_octet)  # IPV4
             imported_addrs.append(a)
             self.nodes[0].addpeeraddress(a, 8333)
 
@@ -212,6 +212,7 @@ class NetTest(BitcoinTestFramework):
             assert_equal(a["services"], NODE_NETWORK | NODE_WITNESS)
             assert a["address"] in imported_addrs
             assert_equal(a["port"], 8333)
+            assert_equal(a["network"], "ipv4")
 
         node_addresses = self.nodes[0].getnodeaddresses(1)
         assert_equal(len(node_addresses), 1)