From e5982ecdc4650e9b6de38f190f3a97d792499e2a Mon Sep 17 00:00:00 2001
From: Suhas Daftuar <sdaftuar@gmail.com>
Date: Tue, 30 Aug 2022 12:45:21 -0400
Subject: Bypass headers anti-DoS checks for NoBan peers

---
 src/net_processing.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'src')

diff --git a/src/net_processing.cpp b/src/net_processing.cpp
index 746e3bedde..74700580ad 100644
--- a/src/net_processing.cpp
+++ b/src/net_processing.cpp
@@ -2820,6 +2820,13 @@ void PeerManagerImpl::ProcessHeadersMessage(CNode& pfrom, Peer& peer,
         }
     }
 
+    // If our peer has NetPermissionFlags::NoBan privileges, then bypass our
+    // anti-DoS logic (this saves bandwidth when we connect to a trusted peer
+    // on startup).
+    if (pfrom.HasPermission(NetPermissionFlags::NoBan)) {
+        already_validated_work = true;
+    }
+
     // At this point, the headers connect to something in our block index.
     // Do anti-DoS checks to determine if we should process or store for later
     // processing.
-- 
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