import { Middleware } from '../../api/generated/default';
import type { AntiAbuseOracleSelectorService, AntiAbuseOracleNode, AntiAbuseOracleSelectorConfig } from './types';
export declare class AntiAbuseOracleSelector implements AntiAbuseOracleSelectorService {
    private readonly endpoints;
    private readonly registeredAddresses;
    private readonly logger;
    private selectedNode;
    constructor(config?: AntiAbuseOracleSelectorConfig);
    createMiddleware(): Middleware;
    /**
     * Gets the currently selected Anti Abuse Oracle.
     * @throws if no service is available.
     */
    getSelectedService(): Promise<AntiAbuseOracleNode>;
    /**
     * Races the configured endpoints for the fastest healthy registered service.
     * @throws if no services available.
     */
    private select;
    /**
     * Fetches the healthcheck for the given endpoint, and checks that the wallet
     * is a registered Anti Abuse Oracle wallet.
     * @returns the node wallet and endpoint if healthy
     */
    private getNode;
}