For deno

verify_apple_receipt.ts

// see https://www.npmjs.com/package/node-apple-receipt-verify#configoptions-object
// https://medium.com/axel-springer-tech/debugging-and-reading-apple-receipts-2e47f9793f74
import { parseArgs } from "jsr:@std/cli/parse-args";
import { config as appleReceiptVerifyConfig, validate } from "npm:node-apple-receipt-verify";

const params = {
  string: ["environment"],
  boolean: ["ignoreExpired", "extended", "verbose", "ignoreExpiredError", "excludeOldTransactions"],
  alias: {
    p: "environment",
    ie: "ignoreExpired",
    ee: "extended",
    e: "verbose",
    iee: "ignoreExpiredError",
    eot: "excludeOldTransactions",
  },
  default: {
    environment: "production,sandbox",
    ignoreExpired: false,
    extended: false,
    verbose: true,
    ignoreExpiredError: false,
    excludeOldTransactions: false,
  },
} as const;

const { _: [filePath], ...args } = parseArgs(Deno.args, params);

if (typeof filePath !== "string") {
  console.log(
    "Usage: deno run --allow-read --allow-env verify.ts <receipt file path>{ <optionalFlag>}\n",
  );
  console.log(
    "Optional flags (see https://www.npmjs.com/package/node-apple-receipt-verify#configoptions-object):",
  );
  for (const key of [...params.string, ...params.boolean]) {
    const alias = Object.keys(params.alias).find((k) =>
      params.alias[k as keyof typeof params.alias] === key
    );
    console.log(` ${alias}, ${key}, default=${params.default[key]}, set=${args[key]}`);
  }
  console.log(
    "\nPrecondition: Set APP_STORE_SHARED_SECRET environment variable with your shared secret\n",
  );

  Deno.exit(1);
}

const sharedSecret = Deno.env.get("APP_STORE_SHARED_SECRET");
if (!sharedSecret) {
  console.error("Error: APP_STORE_SHARED_SECRET environment variable is not set");
  Deno.exit(1);
}

const receiptData = await Deno.readTextFile(filePath);

const config = {
  secret: sharedSecret,
  ...Object.fromEntries(Object.values(params.alias).map((name) => [name, args[name]])),
  environment: args.environment.split(","),
};

appleReceiptVerifyConfig(config);

try {
  const validatedData = await validate({ receipt: receiptData });
  for (const data of validatedData) {
    const expirationMs = parseInt(data.expirationDate);
    data.expirationDateString = new Date(expirationMs).toLocaleString();
    const purchaseMs = parseInt(data.purchaseDate);
    data.purchaseDateString = new Date(purchaseMs).toLocaleString();
  }
  console.log(validatedData);
} catch (error) {
  console.error(error);
}