import { HttpException } from "@nestjs/common";
/**
 * Thrown when Google OAuth code exchange fails.
 *
 * Returns HTTP 401 Unauthorized.
 *
 * @example
 * ```typescript
 * if (!tokenResponse.ok) {
 *   throw new GoogleCodeExchangeException('token endpoint returned 400')
 * }
 * ```
 */
export declare class GoogleCodeExchangeException extends HttpException {
    readonly reason: string;
    /**
     * @param reason - Description of why the code exchange failed
     */
    constructor(reason: string);
}