@pedwise/next-firebase-auth-edge/src/auth/firebase.ts

Next.js 13 Firebase Authentication for Edge and server runtimes. Dedicated for Next 13 server components. Compatible with Next.js middleware.

import { AuthClientErrorCode, ErrorInfo } from "./error";

export const FIREBASE_AUDIENCE =
  "https://identitytoolkit.googleapis.com/google.identity.identitytoolkit.v1.IdentityToolkit";
export const CLIENT_CERT_URL =
  "https://www.googleapis.com/robot/v1/metadata/x509/securetoken@system.gserviceaccount.com";

export const ID_TOKEN_INFO: FirebaseTokenInfo = {
  url: "https://firebase.google.com/docs/auth/admin/verify-id-tokens",
  verifyApiName: "verifyIdToken()",
  jwtName: "Firebase ID token",
  shortName: "ID token",
  expiredErrorCode: AuthClientErrorCode.ID_TOKEN_EXPIRED,
};

export interface FirebaseTokenInfo {
  url: string;
  verifyApiName: string;
  jwtName: string;
  shortName: string;
  expiredErrorCode: ErrorInfo;
}

export function emulatorHost(): string | undefined {
  return process.env.FIREBASE_AUTH_EMULATOR_HOST;
}

export function useEmulator(): boolean {
  return !!emulatorHost();
}