From ee45d7739f63a8960f18cc288417080728108b15 Mon Sep 17 00:00:00 2001
From: Evgenii Stratonikov <evgeniy@nspcc.ru>
Date: Mon, 7 Dec 2020 18:40:36 +0300
Subject: [PATCH] network: fix `requestTx()`

2 bugs were here:
1. If amount of tx is small, no messages were sent.
2. Correctly cut byte slice if last message is small.
---
 pkg/network/server.go | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/pkg/network/server.go b/pkg/network/server.go
index 077ce0db9..f36677d25 100644
--- a/pkg/network/server.go
+++ b/pkg/network/server.go
@@ -887,12 +887,15 @@ func (s *Server) requestTx(hashes ...util.Uint256) {
 		return
 	}
 
-	for i := 0; i < len(hashes)/payload.MaxHashesCount; i++ {
+	for i := 0; i <= len(hashes)/payload.MaxHashesCount; i++ {
 		start := i * payload.MaxHashesCount
 		stop := (i + 1) * payload.MaxHashesCount
-		if stop < len(hashes) {
+		if stop > len(hashes) {
 			stop = len(hashes)
 		}
+		if start == stop {
+			break
+		}
 		msg := s.MkMsg(CMDGetData, payload.NewInventory(payload.TXType, hashes[start:stop]))
 		// It's high priority because it directly affects consensus process,
 		// even though it's getdata.