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The Binance Chain JavaScript SDK allows browsers and Node.js clients to interact with Binance Chain. It includes the following core components.

• crypto - core cryptographic functions.
• amino - amino (protobuf-like) encoding and decoding of transactions.
• client - implementations of Binance Chain transaction types, such as for transfers and trading.
• accounts - management of "accounts" and wallets, including seed and encrypted mnemonic generation.
• ledger - Ledger Nano S/X support via HID, U2F and Web BLE (Bluetooth).
• rpc - Node RPC client.
• transaction - Transaction Class, build and sign.

You can find more detailed documentation and examples in our Documentation pages.

If you do not need Ledger support with Node.js:

$ npm i @binance-chain/javascript-sdk --no-optional
# Or:
$ yarn add @binance-chain/javascript-sdk --no-optional

If you need Ledger support with Node.js:

$ npm i @binance-chain/javascript-sdk
# Or:
$ yarn add @binance-chain/javascript-sdk

• Windows users: Please install windows-build-tools first.

• Mac users: Make sure XCode Command Line Tools are installed: xcode-select --install.

• Linux users: Note that Ubuntu Xenial and newer distributions are recommended, especially when using Travis or other CI systems. You may need some dev packages to be installed on your system for USB support. On Debian-based distributions (like Ubuntu) you should install them with this command:

  $ sudo apt-get install libudev-dev libusb-dev usbutils

We often see Webpack builds failing with the SDK due to the usb dependency, but adding this to your Webpack config should fix that:

module.exports = {
  plugins: [new webpack.IgnorePlugin(/^usb$/)],
}

All new code changes should be covered with unit tests. You can run the tests with the following command:

$ yarn test

Tests for the Ledger hardware wallet integration have their own suite that runs in both node and in the browser:

$ yarn test:ledger
$ yarn test:ledger:browser

Contributions to the Binance Chain JavaScript SDK are welcome. Please ensure that you have tested the changes with a local client and have added unit test coverage for your code.