Chore: Addtional check against wrapped upgrade error in `ChannelUpgra…

…deTry` (cosmos#5823)

* addtional check

* upgradeErr

* errors.As

* nit

---------

Co-authored-by: Carlos Rodriguez <carlos@interchain.io>
Co-authored-by: Damian Nolan <damiannolan@gmail.com>

modules/core/keeper/msg_server.go

@@ -2,6 +2,7 @@ package keeper
 
 import (
 	"context"
+	"errors"
 
 	metrics "github.com/hashicorp/go-metrics"
 
@@ -815,10 +816,14 @@ func (k Keeper) ChannelUpgradeTry(goCtx context.Context, msg *channeltypes.MsgCh
 	if err != nil {
 		ctx.Logger().Error("channel upgrade try failed", "error", errorsmod.Wrap(err, "channel upgrade try failed"))
 		if channeltypes.IsUpgradeError(err) {
-			k.ChannelKeeper.WriteErrorReceipt(ctx, msg.PortId, msg.ChannelId, err.(*channeltypes.UpgradeError))
-			// NOTE: a FAILURE result is returned to the client and an error receipt is written to state.
-			// This signals to the relayer to begin the cancel upgrade handshake subprotocol.
-			return &channeltypes.MsgChannelUpgradeTryResponse{Result: channeltypes.FAILURE}, nil
+			// In case the error is a wrapped upgrade error, we need to extract the inner error else process as normal
+			var upgradeErr *channeltypes.UpgradeError
+			if errors.As(err, &upgradeErr) {
+				k.ChannelKeeper.WriteErrorReceipt(ctx, msg.PortId, msg.ChannelId, upgradeErr)
+				// NOTE: a FAILURE result is returned to the client and an error receipt is written to state.
+				// This signals to the relayer to begin the cancel upgrade handshake subprotocol.
+				return &channeltypes.MsgChannelUpgradeTryResponse{Result: channeltypes.FAILURE}, nil
+			}
 		}
 
 		// NOTE: an error is returned to baseapp and transaction state is not committed.