import { MemcmpFilter } from '@solana/web3.js';
import { BulkAccountLoader } from '../accounts/bulkAccountLoader';
import { DriftClient } from '../driftClient';
import { ReferrerInfo } from '../types';
export declare class ReferrerMap {
    /**
     * map from authority pubkey to ReferrerInfo.
     * - if a user has not been entered into the map, the value is undefined
     * - if a user has no referrer, the value is null
     * - if a user has a referrer, the value is a ReferrerInfo object
     */
    private referrerMap;
    private driftClient;
    private bulkAccountLoader;
    private parallelSync;
    private fetchPromise?;
    private fetchPromiseResolver;
    /**
     * Creates a new UserStatsMap instance.
     *
     * @param {DriftClient} driftClient - The DriftClient instance.
     * @param {BulkAccountLoader} [bulkAccountLoader] - If not provided, a new BulkAccountLoader with polling disabled will be created.
     */
    constructor(driftClient: DriftClient, bulkAccountLoader?: BulkAccountLoader, parallelSync?: boolean);
    /**
     * Subscribe to all UserStats accounts.
     */
    subscribe(): Promise<void>;
    has(authorityPublicKey: string): boolean;
    get(authorityPublicKey: string): ReferrerInfo | undefined | null;
    addReferrerInfo(authority: string, referrerInfo?: ReferrerInfo | null): Promise<void>;
    /**
     * Enforce that a UserStats will exist for the given authorityPublicKey,
     * reading one from the blockchain if necessary.
     * @param authorityPublicKey
     * @returns
     */
    mustGet(authorityPublicKey: string): Promise<ReferrerInfo | null | undefined>;
    values(): IterableIterator<ReferrerInfo | null>;
    size(): number;
    sync(): Promise<void>;
    syncAll(): Promise<void>;
    syncReferrer(referrerFilter: MemcmpFilter): Promise<void>;
    unsubscribe(): Promise<void>;
}