@trezor/transport/lib/transports/webusb.browser.js

Low level library facilitating protocol buffers based communication with Trezor devices

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.WebUsbTransport = void 0;
const abstractApi_1 = require("./abstractApi");
const usb_1 = require("../api/usb");
const background_browser_1 = require("../sessions/background-browser");
const defaultSessionsBackgroundUrl = window.location.origin + `${process.env.ASSET_PREFIX || ''}/workers/sessions-background-sharedworker.js`.replace(/\/+/g, '/');
class WebUsbTransport extends abstractApi_1.AbstractApiTransport {
  name = 'WebUsbTransport';
  sessionsBackgroundUrl;
  constructor({
    logger,
    sessionsBackgroundUrl,
    ...rest
  }) {
    super({
      api: new usb_1.UsbApi({
        usbInterface: navigator.usb,
        logger
      }),
      logger,
      ...rest
    });
    this.sessionsBackgroundUrl = sessionsBackgroundUrl ?? defaultSessionsBackgroundUrl;
  }
  async trySetSessionsBackground() {
    try {
      const response = await fetch(this.sessionsBackgroundUrl, {
        method: 'HEAD'
      });
      if (!response.ok) {
        console.warn(`Failed to fetch sessions-background SharedWorker from url: ${this.sessionsBackgroundUrl}`);
      } else {
        this.sessionsBackground = new background_browser_1.BrowserSessionsBackground(this.sessionsBackgroundUrl);
        this.sessionsClient.setBackground(this.sessionsBackground);
      }
    } catch (err) {
      console.warn('Unable to load background-sharedworker. Falling back to use local module. Say bye bye to tabs synchronization. Error details: ', err.message);
    }
  }
  async init({
    signal
  } = {}) {
    await this.trySetSessionsBackground();
    return super.init({
      signal
    });
  }
}
exports.WebUsbTransport = WebUsbTransport;
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