Anti p2p fingerprinting via nTime

src/main.cpp

@@ -6979,6 +6979,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
         BOOST_FOREACH(CAddress& addr, vAddr)
         {
             boost::this_thread::interruption_point();
+            fprintf(stderr,"%s: %s.nTime=%d\n", __func__, pfrom->addr.ToString().c_str(), addr.nTime);
 
             if (addr.nTime <= 100000000 || addr.nTime > nNow + 10 * 60)
                 addr.nTime = nNow - 5 * 24 * 60 * 60;

src/net.cpp

@@ -1,6 +1,6 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
 // Copyright (c) 2009-2014 The Bitcoin Core developers
-// Copyright (c) 2016-2020 The Hush developers
+// Copyright (c) 2016-2021 The Hush developers
 // Distributed under the GPLv3 software license, see the accompanying
 // file COPYING or https://www.gnu.org/licenses/gpl-3.0.en.html
 /******************************************************************************
@@ -212,8 +212,10 @@ CAddress GetLocalAddress(const CNetAddr *paddrPeer)
     {
         ret = CAddress(addr);
     }
+    //TODO: option to set custom services
     ret.nServices = nLocalServices;
-    ret.nTime = GetTime();
+    // Round to the nearest 5 min window to avoid fingerprinting -- Duke
+    ret.nTime     = GetTime() - (GetTime() % 300);
     return ret;
 }