import type { BeaconLightClientNetwork } from './beacon.js';
import type { LightClientTransport } from '@lodestar/light-client/transport';
import type { ForkName } from '@lodestar/params';
import type { allForks } from '@lodestar/types';
import type { Debugger } from 'debug';
export declare class UltralightTransport implements LightClientTransport {
    network: BeaconLightClientNetwork;
    logger: Debugger;
    constructor(network: BeaconLightClientNetwork);
    getUpdates(startPeriod: number, count: number): Promise<{
        version: ForkName;
        data: allForks.LightClientUpdate;
    }[]>;
    getOptimisticUpdate(): Promise<{
        version: ForkName;
        data: allForks.LightClientOptimisticUpdate;
    }>;
    getFinalityUpdate(): Promise<{
        version: ForkName;
        data: allForks.LightClientFinalityUpdate;
    }>;
    getBootstrap(blockRoot: string): Promise<{
        version: ForkName;
        data: allForks.LightClientBootstrap;
    }>;
    onOptimisticUpdate(handler: (optimisticUpdate: allForks.LightClientOptimisticUpdate) => void): void;
    onFinalityUpdate(handler: (finalityUpdate: allForks.LightClientFinalityUpdate) => void): void;
}
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