removed obsolete errors

api/ledger/internal/service/ledger/queries.go

@@ -249,15 +249,15 @@ func (s *Service) getStatementResponder(_ context.Context, req *ledgerv1.GetStat
 func parseCursor(cursor string) (int, error) {
 	decoded, err := base64.StdEncoding.DecodeString(cursor)
 	if err != nil {
-		return 0, fmt.Errorf("invalid base64: %w", err)
+		return 0, merrors.InvalidArgumentWrap(err, "invalid cursor base64 encoding")
 	}
 	parts := strings.Split(string(decoded), ":")
 	if len(parts) != 2 || parts[0] != "offset" {
-		return 0, fmt.Errorf("invalid cursor format")
+		return 0, merrors.InvalidArgument("invalid cursor format")
 	}
 	offset, err := strconv.Atoi(parts[1])
 	if err != nil {
-		return 0, fmt.Errorf("invalid offset: %w", err)
+		return 0, merrors.InvalidArgumentWrap(err, "invalid cursor offset")
 	}
 	return offset, nil
 }