From 92aa4f0c7f95b61f612a719594ccf71a34543727 Mon Sep 17 00:00:00 2001
From: Martin Boehm <martin.boehm@1mbsoftware.net>
Date: Wed, 7 Feb 2018 21:11:50 +0100
Subject: [PATCH] Use only index lookup in getBlockHeader, trezor needs only tx
 hash

---
 server/socketio.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/server/socketio.go b/server/socketio.go
index 4d5bcb68..0fb650c8 100644
--- a/server/socketio.go
+++ b/server/socketio.go
@@ -256,6 +256,7 @@ type resultGetBlockHeader struct {
 
 func (s *SocketIoServer) getBlockHeader(height uint32, hash string) (res resultGetBlockHeader, err error) {
 	if hash == "" {
+		// trezor is only interested in hash
 		if height == 0 {
 			height, hash, err = s.db.GetBestBlock()
 			if err != nil {
@@ -267,6 +268,8 @@ func (s *SocketIoServer) getBlockHeader(height uint32, hash string) (res resultG
 				return
 			}
 		}
+		res.Result.Hash = hash
+		return
 	}
 	bh, err := s.chain.GetBlockHeader(hash)
 	if err != nil {