[Github](https://github.com/LedgerHQ/ledgerjs/), [Ledger Devs Slack](https://ledger-dev.slack.com/) ## @ledgerhq/hw-transport-u2f Allows to communicate with Ledger Hardware Wallets. **[Web]** **(U2F)** (legacy but reliable) – FIDO U2F api. [check browser support](https://caniuse.com/u2f). ## API #### Table of Contents - [TransportU2F](#transportu2f) - [Examples](#examples) - [exchange](#exchange) - [Parameters](#parameters) - [setScrambleKey](#setscramblekey) - [Parameters](#parameters-1) - [setUnwrap](#setunwrap) - [Parameters](#parameters-2) - [open](#open) - [Parameters](#parameters-3) ### TransportU2F **Extends Transport** U2F web Transport implementation #### Examples ```javascript import TransportU2F from "@ledgerhq/hw-transport-u2f"; ... TransportU2F.create().then(transport => ...) ``` #### exchange Exchange with the device using APDU protocol. ##### Parameters - `apdu` **[Buffer](https://nodejs.org/api/buffer.html)** Returns **[Promise](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Promise)<[Buffer](https://nodejs.org/api/buffer.html)>** a promise of apdu response #### setScrambleKey ##### Parameters - `scrambleKey` **[string](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/String)** #### setUnwrap ##### Parameters - `unwrap` **[boolean](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Boolean)** #### open static function to create a new Transport from a connected Ledger device discoverable via U2F (browser support) ##### Parameters - `_` **any** - `_openTimeout` **[number](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Number)** (optional, default `5000`) Returns **[Promise](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Promise)<[TransportU2F](#transportu2f)>**