Enhance validation for auxiliary request

The updated code includes enhanced validation processes in the auxiliary request function, now using custom error checking. It ensures the validity of the owner and asset IDs and checks that the value is greater than zero. It also offers improved error messages by replacing govalidator, removing unnecessary 'valid' struct tags and therefore making the overall testing more concise and clear.

x/splits/auxiliaries/burn/auxiliary_keeper.go

@@ -5,6 +5,8 @@ package burn
 
 import (
 	"context"
+	errorConstants "github.com/AssetMantle/schema/go/errors/constants"
+	"reflect"
 
 	"github.com/AssetMantle/modules/helpers"
 	"github.com/AssetMantle/modules/x/splits/utilities"
@@ -17,10 +19,17 @@ type auxiliaryKeeper struct {
 var _ helpers.AuxiliaryKeeper = (*auxiliaryKeeper)(nil)
 
 func (auxiliaryKeeper auxiliaryKeeper) Help(context context.Context, request helpers.AuxiliaryRequest) (helpers.AuxiliaryResponse, error) {
-	auxiliaryRequest := auxiliaryRequestFromInterface(request)
+	if err := request.Validate(); err != nil {
+		return nil, err
+	}
 
+	auxiliaryRequest, ok := request.(auxiliaryRequest)
+	if !ok {
+		return nil, errorConstants.InvalidRequest.Wrapf("invalid request type: %s", reflect.TypeOf(request).String())
+	}
+
 	if _, err := utilities.SubtractSplits(auxiliaryKeeper.mapper.NewCollection(context), auxiliaryRequest.OwnerID, auxiliaryRequest.AssetID, auxiliaryRequest.Value); err != nil {
-		return newAuxiliaryResponse(), err
+		return nil, err
 	}
 
 	return newAuxiliaryResponse(), nil