feat: add api to handle license api keys

apps/api/src/utils.ts

@@ -0,0 +1,28 @@
+import { LEMON_SQUEEZY_API_KEY, LEMON_SQUEEZY_STORE_ID } from ".";
+import type { LemonSqueezyLicenseResponse } from "./types";
+
+export const validateLemonSqueezyLicense = async (
+	licenseKey: string,
+): Promise<LemonSqueezyLicenseResponse> => {
+	try {
+		const response = await fetch(
+			"https://api.lemonsqueezy.com/v1/licenses/validate",
+			{
+				method: "POST",
+				headers: {
+					"Content-Type": "application/json",
+					"x-api-key": LEMON_SQUEEZY_API_KEY as string,
+				},
+				body: JSON.stringify({
+					license_key: licenseKey,
+					store_id: LEMON_SQUEEZY_STORE_ID as string,
+				}),
+			},
+		);
+
+		return response.json();
+	} catch (error) {
+		console.error("Error validating license:", error);
+		return { valid: false, error: "Error validating license" };
+	}
+};