import { TokenPayload } from 'google-auth-library';

type GoogleIdTokenPayloadType = TokenPayload & {
    email: string;
};
/**
 * Verifies a Google ID token and returns the email address if the token is valid and the email is authorized.
 * @param googleClientId - The client ID of the Google application.
 * @param idToken - The ID token to verify.
 * @returns The email address if the token is valid and the email is authorized, or null if not.
 */
declare function decodeGoogleIdToken(googleClientId: string, idToken: string): Promise<GoogleIdTokenPayloadType>;

interface ParsedEmailAddressType {
    originalValue: string;
    username: string;
    domain: string;
    isValid: boolean;
}
declare function parseEmailAddress(email: string): ParsedEmailAddressType;

export { GoogleIdTokenPayloadType, decodeGoogleIdToken, parseEmailAddress };