From d34eb2cdc623c595d8c3bc223cf23ef463830d29 Mon Sep 17 00:00:00 2001
From: Vitaly Kryukov <vit110188@gmail.com>
Date: Sun, 11 Jul 2021 17:03:47 +0300
Subject: [PATCH] Possible fix of https://github.com/xelaj/mtproto/issues/49

---
 internal/utils/utils.go | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/internal/utils/utils.go b/internal/utils/utils.go
index 3de36d8..b49d309 100644
--- a/internal/utils/utils.go
+++ b/internal/utils/utils.go
@@ -16,14 +16,21 @@ import (
 	"time"
 )
 
+var lastMessageId int64
+
 // GenerateMessageId отдает по сути unix timestamp но ужасно специфическим образом
 // TODO: нахуя нужно битовое и на -4??
-func GenerateMessageId() int64 {
+func GenerateMessageId() (r int64) {
 	const billion = 1000 * 1000 * 1000
 	unixnano := time.Now().UnixNano()
 	seconds := unixnano / billion
 	nanoseconds := unixnano % billion
-	return (seconds << 32) | (nanoseconds & -4)
+	r = (seconds << 32) | (nanoseconds & -4)
+	if r == lastMessageId {
+		r += 4
+	}
+	lastMessageId = r
+	return r
 }
 
 func AuthKeyHash(key []byte) []byte {