Initial commit

lib/validation.ts

@@ -0,0 +1,26 @@
+import { z } from "zod";
+
+export const amountSchema = z
+  .string()
+  .trim()
+  .min(1, "Enter an amount")
+  .refine((value) => !Number.isNaN(Number(value)), "Enter a valid number")
+  .transform((value) => Number(value))
+  .refine((value) => Number.isFinite(value), "Enter a valid number")
+  .refine((value) => value > 0, "Amount must be greater than zero")
+  .refine((value) => value <= 1_000_000_000_000, "Amount is too large");
+
+export function validateAmount(amount: string):
+  | { ok: true; value: number }
+  | { ok: false; error: string } {
+  const result = amountSchema.safeParse(amount);
+
+  if (result.success) {
+    return { ok: true, value: result.data };
+  }
+
+  return {
+    ok: false,
+    error: result.error.issues[0]?.message ?? "Invalid amount"
+  };
+}