import { Keypair } from '@solana/web3.js';
import { ChannelOptions, status } from '@grpc/grpc-js';
import { BundleResult } from '../../gen/block-engine/bundle';
import { SearcherServiceClient, SlotList } from '../../gen/block-engine/searcher';
import { Bundle } from './types';
import { Result } from './utils';
export declare class SearcherClientError extends Error {
    code: status;
    details: string;
    constructor(code: status, message: string, details: string);
}
export declare class SearcherClient {
    private client;
    private readonly retryOptions;
    constructor(client: SearcherServiceClient);
    private handleError;
    private retryWithBackoff;
    private isRetryableError;
    /**
    * Submits a bundle to the block-engine.
    *
    * @param bundle - The Bundle object to be sent.
    * @returns A Promise that resolves to the bundle's UUID (string) on successful submission.
    * @throws A ServiceError if there's an issue with the server while sending the bundle.
    */
    sendBundle(bundle: Bundle): Promise<Result<string, SearcherClientError>>;
    /**
     * Retrieves tip accounts from the server.
     *
     * @returns A Promise that resolves to an array of account strings (usually public keys).
     * @throws A ServiceError if there's an issue with the server while fetching tip accounts.
     */
    getTipAccounts(): Promise<Result<string[], SearcherClientError>>;
    /**
    * Retrieves connected leaders (validators) from the server.
    *
    * @returns A Promise that resolves to a map, where keys are validator identity keys (usually public keys), and values are SlotList objects.
    * @throws A ServiceError if there's an issue with the server while fetching connected leaders.
    */
    getConnectedLeaders(): Promise<Result<{
        [key: string]: SlotList;
    }, SearcherClientError>>;
    /**
     * Returns the next scheduled leader connected to the block-engine.
     *
     * @returns A Promise that resolves with an object containing:
     *        - currentSlot: The current slot number the backend is on
     *        - nextLeaderSlot: The slot number of the next scheduled leader
     *        - nextLeaderIdentity: The identity of the next scheduled leader
     * @throws A ServiceError if there's an issue with the server while fetching the next scheduled leader.
     */
    getNextScheduledLeader(): Promise<Result<{
        currentSlot: number;
        nextLeaderSlot: number;
        nextLeaderIdentity: string;
    }, SearcherClientError>>;
    /**
     * Triggers the provided callback on BundleResult updates.
     *
     * @param successCallback - A callback function that receives the BundleResult updates
     * @param errorCallback - A callback function that receives the stream error (Error)
     * @returns A function to cancel the subscription
     */
    onBundleResult(successCallback: (bundleResult: BundleResult) => void, errorCallback: (e: Error) => void): () => void;
    /**
    * Yields on bundle results.
    *
    * @param onError - A callback function that receives the stream error (Error)
    * @returns An async generator that yields BundleResult updates
    */
    bundleResults(onError: (e: Error) => void): AsyncGenerator<BundleResult>;
}
/**
 * Creates and returns a SearcherClient instance.
 *
 * @param url - The URL of the SearcherService
 * @param authKeypair - Optional Keypair authorized for the block engine
 * @param grpcOptions - Optional configuration options for the gRPC client
 * @returns SearcherClient - An instance of the SearcherClient
 */
export declare const searcherClient: (url: string, authKeypair?: Keypair, grpcOptions?: Partial<ChannelOptions>) => SearcherClient;