decode-ios-receipt

index.js

// see https://www.npmjs.com/package/node-apple-receipt-verify#configoptions-object
// https://medium.com/axel-springer-tech/debugging-and-reading-apple-receipts-2e47f9793f74
const params = {
    "-p": {
        "name": "environment",
        "default": ['sandbox'],
        "set": ['production']
    },
    "-ie": {
        "name": "ignoreExpired",
        "default": false,
        "set": true
    },
    "-e": {
        "name": "extended",
        "default": false,
        "set": true
    },
    "-v": {
        "name": "verbose",
        "default": false,
        "set": true
    },
    "-iee": {
        "name": "ignoreExpiredError",
        "default": false,
        "set": true
    },
    "-eot": {
        "name": "excludeOldTransactions",
        "default": false,
        "set": true
    }
};

if (process.argv.length < 4) {
    console.log('Usage: node index.js <keychain password name> <receipt file path>{ <optionalFlag>}\n');
    console.log('Optional flags (see https://www.npmjs.com/package/node-apple-receipt-verify#configoptions-object):');
    for (const [key, value] of Object.entries(params)) {
        console.log(` ${key}, ${value.name}, default=${value.default}, set=${value.set}`);
    }
    console.log('\nPrecondition: Add App Store Connect Shared Secret in KeyChain:');
    console.log('security add-generic-password -a "$USER" -s \'<keychain password name>\' -w \'<shared secret>\'\n');
    
    process.exit(1);
}

const appleReceiptVerify = require('node-apple-receipt-verify');
const fs = require('fs');
const { execSync } = require('child_process');

const keychainPasswordName = process.argv[2];
const filePath = process.argv[3];

const command = `security find-generic-password -a "$USER" -s "${keychainPasswordName}" -w`;
const sharedSecret = execSync(command).toString().trim();

// TODO accept also non-json plain-text receipt data
const receiptData = JSON.parse(fs.readFileSync(filePath, 'utf8')).receiptData;

var config = { secret: sharedSecret, environment: ['sandbox'], ignoreExpired: false, extended: false, verbose: true };
for (var i = 4; i < process.argv.length; i++) {
    const arg = process.argv[i];
    if (params[arg]) {
        config[params[arg].name] = params[arg].set;
    }
}

appleReceiptVerify.config(config);

var expired = [];
var valid = [];
receiptData.forEach((receipt) => {
    appleReceiptVerify.validate({ 'receipt': receipt.toString() })
        .then((validatedData) => {
            validatedData.forEach((data) => {
                let expirationMs = parseInt(data.expirationDate);
                data.expirationDateString = new Date(expirationMs).toLocaleString();
                let purchaseMs = parseInt(data.purchaseDate);
                data.purchaseDateString = new Date(purchaseMs).toLocaleString();
            });
            console.log(validatedData);
        })
        .catch((error) => {
            console.error(error);
        });
});

Read about the details here: Decoding and Debugging Apple Receipts