[protocol] Remove unused CADDR_TIME_VERSION

Add comments to CAddress serialization code explaining why
it's no longer needed.

2 files changed, 7 insertions, 5 deletions

diff --git a/src/protocol.h b/src/protocol.h
index 985f44640b..9ab63a30fb 100644
--- a/src/protocol.h
+++ b/src/protocol.h
@@ -371,7 +371,13 @@ public:
             READWRITE(nVersion);
         }
         if ((s.GetType() & SER_DISK) ||
-            (nVersion >= CADDR_TIME_VERSION && !(s.GetType() & SER_GETHASH))) {
+            (nVersion != INIT_PROTO_VERSION && !(s.GetType() & SER_GETHASH))) {
+            // The only time we serialize a CAddress object without nTime is in
+            // the initial VERSION messages which contain two CAddress records.
+            // At that point, the serialization version is INIT_PROTO_VERSION.
+            // After the version handshake, serialization version is >=
+            // MIN_PEER_PROTO_VERSION and all ADDR messages are serialized with
+            // nTime.
             READWRITE(obj.nTime);
         }
         READWRITE(Using<CustomUintFormatter<8>>(obj.nServices));
diff --git a/src/version.h b/src/version.h
index d932b512d4..d2a747fab3 100644
--- a/src/version.h
+++ b/src/version.h
@@ -20,10 +20,6 @@ static const int GETHEADERS_VERSION = 31800;
 //! disconnect from peers older than this proto version
 static const int MIN_PEER_PROTO_VERSION = GETHEADERS_VERSION;
 
-//! nTime field added to CAddress, starting with this version;
-//! if possible, avoid requesting addresses nodes older than this
-static const int CADDR_TIME_VERSION = 31402;
-
 //! BIP 0031, pong message, is enabled for all versions AFTER this one
 static const int BIP0031_VERSION = 60000;