From 6c23a791101162f2defd7667a714869faa3d3325 Mon Sep 17 00:00:00 2001
From: Tyler <48813565+technicallyty@users.noreply.github.com>
Date: Thu, 30 Jan 2025 10:59:55 -0800
Subject: [PATCH] check ack nil

---
 modules/core/keeper/msg_server.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/modules/core/keeper/msg_server.go b/modules/core/keeper/msg_server.go
index 1dbec1870c8..0e0d6be4082 100644
--- a/modules/core/keeper/msg_server.go
+++ b/modules/core/keeper/msg_server.go
@@ -399,7 +399,7 @@ func (k *Keeper) RecvPacket(ctx context.Context, msg *channeltypes.MsgRecvPacket
 	if err := k.BranchService.Execute(ctx, func(subCtx context.Context) error {
 		// Perform application logic callback
 		ack = cbs.OnRecvPacket(subCtx, channelVersion, msg.Packet, relayer)
-		if !ack.Success() {
+		if ack != nil && !ack.Success() {
 			// we must return an error here so that false positive events are not emitted
 			events = sdk.UnwrapSDKContext(subCtx).EventManager().Events()
 			return channeltypes.ErrFailedAcknowledgement