Make firebase admin work with nestjs

gistfile1.txt

import { App, initializeApp, cert, getApps } from 'firebase-admin/app';
import { getMessaging, Message } from 'firebase-admin/messaging';
import { ServiceAccount } from 'firebase-admin';

// Ensure gaxios (used by firebase-admin & google-auth-library) uses Node native fetch
function patchGaxiosClass(Gaxios: any) {
  if (Gaxios && !(Gaxios.prototype as any).__fetchPatched) {
    (Gaxios.prototype as any).__fetchPatched = true;
    const originalRequest = Gaxios.prototype.request;
    Gaxios.prototype.request = function (opts: any) {
      opts = opts || {};
      opts.fetchImplementation = opts.fetchImplementation || this.defaults?.fetchImplementation || globalThis.fetch;
      return originalRequest.call(this, opts);
    };
  }
}

try {
  const fbPath = require.resolve('firebase-admin');
  const gauthPath = require.resolve('google-auth-library', { paths: [fbPath] });
  const gaxiosPath = require.resolve('gaxios', { paths: [gauthPath] });
  patchGaxiosClass(require(gaxiosPath).Gaxios);
} catch {}

try {
  patchGaxiosClass(require('gaxios').Gaxios);
} catch {}