import { Action } from "./actions";
import { ActionPayload } from "./payloads";
type DispatchToken = string;
/**
 * A dispatcher for ActionPayloads (the default within the SDK).
 * Based on the old Flux dispatcher https://github.com/facebook/flux/blob/main/src/Dispatcher.js
 */
export declare class MatrixDispatcher {
    private readonly callbacks;
    private readonly isHandled;
    private readonly isPending;
    private pendingPayload?;
    private lastId;
    /**
     * Registers a callback to be invoked with every dispatched payload. Returns
     * a token that can be used with `waitFor()`.
     */
    register(callback: (payload: ActionPayload) => void): DispatchToken;
    /**
     * Removes a callback based on its token.
     */
    unregister(id: DispatchToken): void;
    /**
     * Waits for the callbacks specified to be invoked before continuing execution
     * of the current callback. This method should only be used by a callback in
     * response to a dispatched payload.
     */
    waitFor(ids: DispatchToken[]): void;
    /**
     * Dispatches a payload to all registered callbacks.
     */
    private _dispatch;
    /**
     * Is this Dispatcher currently dispatching.
     */
    isDispatching(): boolean;
    /**
     * Call the callback stored with the given id. Also do some internal
     * bookkeeping.
     *
     * Must only be called with an id which has a callback and pendingPayload set
     * @internal
     */
    private invokeCallback;
    /**
     * Set up bookkeeping needed when dispatching.
     *
     * @internal
     */
    private startDispatching;
    /**
     * Clear bookkeeping used for dispatching.
     *
     * @internal
     */
    private stopDispatching;
    /**
     * Dispatches an event on the dispatcher's event bus.
     * @param {ActionPayload} payload Required. The payload to dispatch.
     * @param {boolean=false} sync Optional. Pass true to dispatch
     *        synchronously. This is useful for anything triggering
     *        an operation that the browser requires user interaction
     *        for. Default false (async).
     */
    dispatch<T extends ActionPayload>(payload: T, sync?: boolean): void;
    /**
     * Shorthand for dispatch({action: Action.WHATEVER}, sync). No additional
     * properties can be included with this version.
     * @param {Action} action The action to dispatch.
     * @param {boolean=false} sync Whether the dispatch should be sync or not.
     * @see dispatch(action: ActionPayload, sync: boolean)
     */
    fire(action: Action, sync?: boolean): void;
}
export declare const defaultDispatcher: MatrixDispatcher;
export default defaultDispatcher;