/**
 * Dfault type of async function
 */
export declare const DEFAULT_ASYNC_TYPE: number;
/**
 * Default message used across postMessage
 */
export declare const DEFAULT_MESSAGE = "js-rpc-message";
/**
 * ms to wait before retrying *first* create signal
 */
export declare const DEFAULT_CREATE_RETRY = 10;
/**
 * multiplier used to "curve" `DEFAULT_CREATE_RETRY`
 */
export declare const DEFAULT_CREATE_RETRY_CURVE = 1.2;
/**
 * ms to wait before giving up on create exchange
 */
export declare const DEFAULT_CREATE_WAIT = 30000;
/**
 * ms to wait before timeout on acks, if useAcks is one
 */
export declare const DEFAULT_TIMEOUT_ACK = 5000;