From 61a15f6f1bea14cb47aa4d70dd3d38dee5e7c701 Mon Sep 17 00:00:00 2001
From: David Hill <dhill@mindcry.org>
Date: Mon, 25 Jul 2016 11:16:57 -0400
Subject: [PATCH] blockchain: optimize HaveBlock (#720)

If a block is known to exist in the memory chain or database then
there is no need to check the orphan pool.
---
 blockchain/chain.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/blockchain/chain.go b/blockchain/chain.go
index aa1f407e..f265a516 100644
--- a/blockchain/chain.go
+++ b/blockchain/chain.go
@@ -238,7 +238,7 @@ func (b *BlockChain) HaveBlock(hash *wire.ShaHash) (bool, error) {
 	if err != nil {
 		return false, err
 	}
-	return b.IsKnownOrphan(hash) || exists, nil
+	return exists || b.IsKnownOrphan(hash), nil
 }
 
 // IsKnownOrphan returns whether the passed hash is currently a known orphan.