/// <reference types="node" />
type BeforeEventCallback = (value: EventData, topic?: string) => Object;
type AfterEventCallback = (value: EventData, topic?: string, result?: Object) => void;
type ReceivedEventCallback = (value: EventData, topic?: string, result?: Object) => Object;
export type EventData = string | Buffer;
export interface EventReturn {
    [key: string]: (value: EventData, topic?: string, result?: Object) => Object | void;
}
export declare enum SubscriptionTopics {
    rawTx = "rawtx",
    hashTx = "hashtx",
    rawBlock = "rawblock",
    hashBlock = "hashblock",
    sequence = "sequence"
}
export interface SubscriptionEventsHandler {
    before?: BeforeEventCallback;
    after?: AfterEventCallback;
    onRawTxReceived?: ReceivedEventCallback;
    onHashTxReceived?: ReceivedEventCallback;
    onRawBlockReceived?: ReceivedEventCallback;
    onHashBlockReceived?: ReceivedEventCallback;
    onSequenceReceived?: ReceivedEventCallback;
}
export declare class VerusZmqConnection {
    private address;
    private port;
    private protocol;
    constructor(address: string, port: number, protocol?: string);
    getAddress(): string;
}
export declare class VerusZmqOptions {
    readonly connection: VerusZmqConnection;
    readonly topics: SubscriptionTopics[];
    private readonly events;
    constructor(server: VerusZmqConnection, topics: SubscriptionTopics[], events: SubscriptionEventsHandler);
    readonly getTopics: (topics: SubscriptionTopics[]) => SubscriptionTopics[];
    getEventHandlers(): EventReturn;
}
export {};