From e2bf0f3fbd2ba71b42130daf26b42c4243806d0d Mon Sep 17 00:00:00 2001
From: lx <92799281+brilliant-lx@users.noreply.github.com>
Date: Mon, 21 Aug 2023 10:31:18 +0800
Subject: [PATCH] fix: lagging nodes failed to sync (#1829)

FastFinality puts more infor into the header.extra field to keep vote information.
For mainnet, on epoch height, it could be 1526 bytes, which was 517 bytes before.
So the hardcoded 700 bytes for header could be no longer enough, increase it by
2 times would be enough.

this bug could cause P2P sync failure for nodes that are lagging behind, since they
would request access of ancient db, and GetBlockHeaders could be failed.
---
 core/rawdb/accessors_chain.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/core/rawdb/accessors_chain.go b/core/rawdb/accessors_chain.go
index 690536cd5d..6b6af68bb7 100644
--- a/core/rawdb/accessors_chain.go
+++ b/core/rawdb/accessors_chain.go
@@ -318,7 +318,7 @@ func ReadHeaderRange(db ethdb.Reader, number uint64, count uint64) []rlp.RawValu
 		return rlpHeaders
 	}
 	// read remaining from ancients
-	max := count * 700
+	max := count * 700 * 3
 	data, err := db.AncientRange(freezerHeaderTable, i+1-count, count, max)
 	if err == nil && uint64(len(data)) == count {
 		// the data is on the order [h, h+1, .., n] -- reordering needed