return UTC time in time out error message

modules/core/04-channel/keeper/packet.go

@@ -98,10 +98,7 @@ func (k Keeper) SendPacket(
 		}
 
 		if packet.GetTimeoutTimestamp() != 0 && latestTimestamp >= packet.GetTimeoutTimestamp() {
-			return sdkerrors.Wrapf(
-				types.ErrPacketTimeout,
-				"receiving chain block timestamp >= packet timeout timestamp (%s >= %s)", time.Unix(0, int64(latestTimestamp)), time.Unix(0, int64(packet.GetTimeoutTimestamp())),
-			)
+			return GetPacketTimeoutErrorMessage(int64(latestTimestamp), int64(packet.GetTimeoutTimestamp()))
 		}
 	}
 
@@ -140,6 +137,15 @@ func (k Keeper) SendPacket(
 	return nil
 }
 
+func GetPacketTimeoutErrorMessage(latestTimestamp int64, timeoutTimestamp int64) error {
+	return sdkerrors.Wrapf(
+		types.ErrPacketTimeout,
+		"receiving chain block timestamp >= packet timeout timestamp (%s >= %s)",
+		time.Unix(0, latestTimestamp).UTC(),
+		time.Unix(0, timeoutTimestamp).UTC(),
+	)
+}
+
 // RecvPacket is called by a module in order to receive & process an IBC packet
 // sent on the corresponding channel end on the counterparty chain.
 func (k Keeper) RecvPacket(

modules/core/04-channel/keeper/packet_test.go

@@ -3,6 +3,8 @@ package keeper_test
 import (
 	"errors"
 	"fmt"
+	"github.com/cosmos/ibc-go/v3/modules/core/04-channel/keeper"
+	"testing"
 
 	sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
 	capabilitytypes "github.com/cosmos/cosmos-sdk/x/capability/types"
@@ -868,3 +870,35 @@ func (suite *KeeperTestSuite) TestAcknowledgePacket() {
 		})
 	}
 }
+
+func Test_GetPacketTimeoutErrorMessage(t *testing.T) {
+	type args struct {
+		latestTimestamp  int64
+		timeoutTimestamp int64
+	}
+	tests := []struct {
+		name       string
+		args       args
+		wantErr    bool
+		wantErrMsg string
+	}{
+		{
+			"test that timestamp is in UTC",
+			args{
+				latestTimestamp:  1734828084008577679,
+				timeoutTimestamp: 1734882264,
+			},
+			true,
+			"receiving chain block timestamp >= packet timeout timestamp (2024-12-22 00:41:24.008577679 +0000 UTC >= 1970-01-01 00:00:01.734882264 +0000 UTC): packet timeout",
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if err := keeper.GetPacketTimeoutErrorMessage(tt.args.latestTimestamp, tt.args.timeoutTimestamp); (err != nil) != tt.wantErr {
+				t.Errorf("getWrongTimestampErrorMessage() error = %v, wantErr %v", err, tt.wantErr)
+			} else if err != nil && err.Error() != tt.wantErrMsg {
+				t.Errorf("getWrongTimestampErrorMessage() error = %v, wantErrMsg %v", err.Error(), tt.wantErrMsg)
+			}
+		})
+	}
+}