import { IInjectedMessageData, IInjectedProviderRequest } from "@cryptkeeperzk/types";
import { EventHandler, EventName } from "../event";
export declare class Handler {
    /**
     * Nonce used for message communication.
     */
    private nonce;
    /**
     * EventEmitter for handling events.
     */
    private emitter;
    /**
     * Stores promises associated with message nonces.
     */
    private requestsPromises;
    /**
     * EventEmitter for handling events.
     */
    protected connectedOrigin?: string;
    /**
     * Creates an instance of CryptKeeperInjectedProvider.
     *
     * @constructor
     */
    constructor(connectedOrigin?: string);
    on(eventName: EventName, cb: EventHandler): void;
    emit(eventName: EventName, payload?: unknown): void;
    cleanListeners(): void;
    /**
     * Sends a message to the extension.
     *
     * @param {IInjectedProviderRequest} message - The message to send.
     * @returns {Promise<unknown>} A Promise that resolves to the response from the extension.
     */
    protected post(message: IInjectedProviderRequest): Promise<unknown>;
    /**
     * Handles incoming messages from the extension.
     *
     * @param {IInjectedMessageData} event - The message event.
     * @returns {unknown} The result of handling the event.
     */
    eventResponser: (event: MessageEvent<IInjectedMessageData>) => unknown;
}
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