@web3auth/no-modal/dist/lib.cjs/connectors/utils.js

Multi chain wallet aggregator for web3Auth

'use strict';

var eccrypto = require('@toruslabs/eccrypto');
var metadataHelpers = require('@toruslabs/metadata-helpers');
var auth = require('@web3auth/auth');

/**
 * Extracts a name for the site from the DOM
 */
const getSiteName = window => {
  const {
    document
  } = window;
  const siteName = document.querySelector('head > meta[property="og:site_name"]');
  if (siteName) {
    return siteName.content;
  }
  const metaTitle = document.querySelector('head > meta[name="title"]');
  if (metaTitle) {
    return metaTitle.content;
  }
  if (document.title && document.title.length > 0) {
    return document.title;
  }
  return window.location.hostname;
};
/**
 * Returns whether the given image URL exists
 * @param url - the url of the image
 * @returns - whether the image exists
 */
function imgExists(url) {
  return new Promise((resolve, reject) => {
    try {
      const img = document.createElement("img");
      img.onload = () => resolve(true);
      img.onerror = () => resolve(false);
      img.src = url;
    } catch (e) {
      reject(e);
    }
  });
}
/**
 * Extracts an icon for the site from the DOM
 */
async function getSiteIcon(window) {
  const {
    document
  } = window;
  // Use the site's favicon if it exists
  let icon = document.querySelector('head > link[rel="shortcut icon"]');
  if (icon && (await imgExists(icon.href))) {
    return icon.href;
  }
  // Search through available icons in no particular order
  icon = Array.from(document.querySelectorAll('head > link[rel="icon"]')).find(_icon => Boolean(_icon.href)) || null;
  if (icon && (await imgExists(icon.href))) {
    return icon.href;
  }
  return undefined;
}
function parseToken(token) {
  const [header, payload] = token.split(".");
  return {
    header: auth.base64toJSON(header),
    payload: auth.base64toJSON(payload)
  };
}
const generateNonce = () => {
  return metadataHelpers.bytesToHexPrefixedString(eccrypto.generatePrivate());
};

exports.generateNonce = generateNonce;
exports.getSiteIcon = getSiteIcon;
exports.getSiteName = getSiteName;
exports.parseToken = parseToken;