feat: accounting

lib/utils.ts

@@ -35,6 +35,16 @@ export const parseStoreRate = (value: string | number): number => {
     return Math.min(100, Math.max(0, n));
 };
 
+// Parse a non-negative integer input (e.g. transaction fee in Rial).
+export const parseFee = (value: string | number): number => {
+    if (value === null || value === undefined || value === '') return 0;
+    const str = String(value).replace(/[^\d]/g, '');
+    if (!str) return 0;
+    const n = parseInt(str, 10);
+    if (Number.isNaN(n)) return 0;
+    return Math.max(0, n);
+};
+
 export const formatDate = (dateString: string | null): string => {
     if (!dateString) return 'نامشخص';