import WebSocket from "ws";
import { EthereumProvider, JsonRpcRequest, JsonRpcServer as IJsonRpcServer, NetworkConfig } from "hardhat/types";
import { JsonRpcResponse } from "hardhat/internal/util/jsonrpc";
export interface CTFWebsocketServerConfig {
    hostname: string;
    port: number;
    networkConfig: NetworkConfig;
    initializationHook?: (provider: EthereumProvider) => Promise<void>;
    responseHook?: (provider: EthereumProvider, rpcReq: JsonRpcRequest, rpcResp: JsonRpcResponse) => Promise<JsonRpcResponse>;
}
export declare class CTFWebsocketServer implements IJsonRpcServer {
    private _config;
    private _wsServer;
    constructor(config: CTFWebsocketServerConfig);
    handleWs: (ws: WebSocket) => Promise<void>;
    listen: () => Promise<{
        address: string;
        port: number;
    }>;
    waitUntilClosed: () => Promise<void>;
    close: () => Promise<void>;
}
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