/// <reference types="node" />
import EventEmitter from 'events';
export interface IJSONRPCError {
    code: number;
    message: string;
    data: any;
}
export interface IJSONRPCRequest {
    jsonrpc: '2.0';
    method: string;
    params?: any;
    id?: string | number;
}
export interface IJSONRPCResultResponse<T> {
    jsonrpc: '2.0';
    result: T;
    id: string | number;
}
export interface IJSONRPCErrorResponse {
    jsonrpc: '2.0';
    error: IJSONRPCError;
    id: string | number;
}
export interface IJSONRPCResponse<T> extends IJSONRPCResultResponse<T>, IJSONRPCErrorResponse {
}
export declare enum JSONRPCProtocol {
    HTTP = 0,
    WS = 1
}
export declare enum RPCClientEvent {
    /** Emitted when a connection is established with the server. */
    Connected = "connected",
    /** Emitted when the connection to the server is closed down. */
    Disconnected = "disconnected",
    /** Emitted when an error is encountered that can't be propagated in a more sensible fashion. */
    Error = "error",
    /** Emitted when an event message (not a response message) is received from the server. */
    Message = "message",
    /**
     * Emitted when an EVM event message (not a response message) is received from the server
     * EVM do not subscribe to subevents as normal Loom events, it only focus listen the emitter
     */
    EVMMessage = "EVMMessage",
    /**
     * Emitted when chain events subscription status changes.
     * Listener will receive a single boolean value, `true` indicates that the event subscription is
     * active, `false` indicates that it's inactive.
     */
    Subscribed = "subscribed",
    Unsubscribed = "unsubscribed"
}
/**
 * Sends JSON-RPC messages.
 */
export interface IJSONRPCClient extends EventEmitter {
    url: string;
    requestTimeout: number;
    isSubscribed: boolean;
    disconnect(): void;
    ensureConnectionAsync(): Promise<void>;
    sendAsync<T>(method: string, params: object | any[]): Promise<T>;
}