import type { TwoFactorFetchOption } from '#auth-types';
export interface TokenResponse {
    token: string;
    refresh_token: string;
    expires: string;
}
/**
 * Validates token response structure.
 * @param response The response object to validate.
 * @param isRefresh Whether this is a refresh token flow (refresh_token is optional).
 * @throws An error if the response is invalid.
 */
export declare function validateTokenResponse(response: any, isRefresh?: boolean): void;
/**
 * Validates 2FA response structure.
 * @param response The response object to validate.
 * @param configT2fa The passport strategies configuration containing twoFactor endpoint settings.
 * @throws An error if the response is invalid.
 */
export declare function validateTwoFactorResponse(response: any, configT2fa: TwoFactorFetchOption): void;
/**
 * Validates request body for authentication endpoints.
 * @param body The request body to validate.
 * @param requiredFields Array of required field names.
 * @throws An error if validation fails.
 */
export declare function validateRequestBody(body: any, requiredFields: string[]): void;
/**
 * Formats token response for client.
 * @param response The raw token response from API.
 * @returns Formatted token response.
 */
export declare function formatTokenResponse(response: any): TokenResponse;
/**
 * Formats 2FA response for client.
 * @param response The raw 2FA response from API.
 * @param configT2fa The passport strategies configuration containing twoFactor endpoint settings.
 * @returns Formatted 2FA response.
 */
export declare function formatTwoFactorResponse(response: any, configT2fa: TwoFactorFetchOption): {
    token: string;
    expires: string;
};