import { GatewayToken, State } from '../types';
export declare const hasExpired: (expiryTime: number) => boolean;
export declare const isTokenRefreshRequired: ({ gatewayToken, tokenExpirationMarginSeconds, }: {
    gatewayToken?: GatewayToken | undefined;
    tokenExpirationMarginSeconds: number;
}) => boolean;
export declare const MAX_ALLOWED_TIMEOUT = 2147483647;
export declare const nowSeconds: () => number;
/**
 * return the expiry time in milliseconds from the current time until the gateway token expires
 * taking into account a margin (if provided). If the interval is too large for a javascript timer
 * then return the maximum allowed timeout
 * @param {number} expiryTimeSeconds
 * @param {number} tokenExpirationMarginSeconds
 * @returns {number}
 */
export declare const getTokenRefreshIntervalMilliseconds: (expiryTimeSeconds: number, tokenExpirationMarginSeconds: number) => number;
export declare const isTokenActive: (token?: {
    state: State | undefined;
    expiryTime?: number | undefined;
}) => boolean;