zenroom

Use Zenroom in JavaScript

Zenroom js bindings 🧰
_{Zenroom js bindings provides a javascript wrapper of Zenroom, a secure and small virtual machine for crypto language processing.}

💾 Install

Stable releases are published on https://www.npmjs.com/package/zenroom that have a slow pace release schedule that you can install with

yarn add zenroom
# or if you use npm
npm install zenroom

---

🎮 Usage

The bindings are composed of two main functions:

• zencode_exec to execute Zencode. To learn more about zencode syntax look here
• zenroom_exec to execute our special flavor of Lua enhanced with Zenroom's special effects

Both of this functions accepts a mandatory SCRIPT to be executed and some optional parameters:

• DATA
• KEYS
• CONF

All in form of strings. This means that if you want to pass a JSON you have to JSON.stringify it before.

Both functions return a Promise.

To start using the zenroom vm just

import { zenroom_exec, zencode_exec, introspection } from "zenroom";
// or if you don't use >ES6
// const { zenroom_exec, zencode_exec } = require('zenroom')

// Zencode: generate a random array. This script takes no extra input

const zencodeRandom = `
  Given nothing
  When I create the random array with '16' elements each of '32' bits
  Then print all data
`;

zencode_exec(zencodeRandom)
  .then((result) => {
    console.log(result);
  })
  .catch((error) => {
    console.error(error);
  });

// Zencode: encrypt a message.
// This script takes the options' object as the second parameter: you can include data and/or keys as input.
// The "config" parameter is also optional.

const zencodeEncrypt = `
  Scenario 'ecdh': Encrypt a message with the password
  Given that I have a 'string' named 'password'
  Given that I have a 'string' named 'message'
  When I encrypt the secret message 'message' with 'password'
  Then print the 'secret message'`;

const zenKeys = `
  {
    "password": "myVerySecretPassword"
  }
`;

const zenData = `
  {
      "message": "HELLO WORLD"
  }
`;

zencode_exec(zencodeEncrypt, {
  data: zenData,
  keys: zenKeys,
  conf: `debug=1`,
})
  .then((result) => {
    console.log(result);
  })
  .catch((error) => {
    console.error(error);
  });

// Lua Hello World!

const lua = `print("Hello World!")`;
zenroom_exec(lua)
  .then((result) => {
    console.log(result);
  })
  .catch((error) => {
    console.error(error);
  });

// to pass the optional parameters you pass an object literal eg.

try {
  const result = await zenroom_exec(`print(DATA)`, {
    data: "Some data",
    keys: "Some other data",
    conf: `debug=1`,
  });
  console.log(result); // => Some data
} catch (e) {
  console.error(e);
}

// code inspection is done via the `zencode_valid_input` primitive function or by a utility `introspect`

const introspection = await introspection(
  `Given I have a 'string' named 'missing'
  Then print the codec`
);
console.log(introspection); // => an object described as https://dev.zenroom.org/#/pages/how-to-embed?id=input-validation

😍 Acknowledgements

Copyright (C) 2018-2025 by Dyne.org foundation, Amsterdam

Designed, written and maintained by Puria Nafisi Azizi.

This project is receiving funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement nr. 732546 (DECODE).

---

👤 Contributing

Please first take a look at the Dyne.org - Contributor License Agreement then

1. FORK IT
2. Create your feature branch git checkout -b feature/branch
3. Commit your changes git commit -am 'Add some fooBar'
4. Push to the branch git push origin feature/branch
5. Create a new Pull Request
6. Thank you

---

💼 License

  Zenroom js - a javascript wrapper of zenroom
  Copyright (c) 2018-2025 Dyne.org foundation, Amsterdam

  This program is free software: you can redistribute it and/or modify
  it under the terms of the GNU Affero General Public License as
  published by the Free Software Foundation, either version 3 of the
  License, or (at your option) any later version.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU Affero General Public License for more details.

  You should have received a copy of the GNU Affero General Public License
  along with this program.  If not, see <http://www.gnu.org/licenses/>.