import { type SubscriptionManager } from '@acala-network/chopsticks-core';
export type Handler = (data: {
    method: string;
    params: string[];
}, subscriptionManager: SubscriptionManager) => Promise<any>;
export declare const createServer: (handler: Handler, port: number, host?: string) => Promise<{
    addr: string;
    port: number;
    close: () => Promise<void>;
}>;