import { type IHttpOpts, type MatrixHttpApi } from "./http-api/index.ts";
import { type Logger } from "./logger.ts";
import { TypedEventEmitter } from "./models/typed-event-emitter.ts";
/**
 * Manages storing and periodically refreshing the server capabilities.
 */
export declare abstract class CapabilityPoller<ResponseType> extends TypedEventEmitter<"update", {
    update: (data: ResponseType) => void;
}> {
    protected readonly logger: Logger;
    protected readonly http: MatrixHttpApi<IHttpOpts & {
        onlyData: true;
    }>;
    private readonly name;
    protected cached?: ResponseType;
    private retryTimeout?;
    private refreshTimeout?;
    constructor(logger: Logger, http: MatrixHttpApi<IHttpOpts & {
        onlyData: true;
    }>, name: string);
    /**
     * Starts periodically fetching the server capabilities.
     */
    start(): void;
    /**
     * Stops the service
     */
    stop(): void;
    /**
     * Returns the cached capabilities, or undefined if none are cached.
     * @returns the current capabilities, if any.
     */
    getCached(): ResponseType | undefined;
    abstract fetch(): Promise<ResponseType>;
    private poll;
    private clearTimeouts;
}
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