/******************************************************************************
 *
 *  (C) 2022 AhnLab Blockchain Company, Inc. All rights reserved.
 *  Any part of this source code can not be copied with any method without
 *  prior written permission from the author or authorized person.
 *
 ******************************************************************************/
import { PollingBlockTracker } from 'eth-block-tracker';
export default function createJsonRpcClient({ rpcUrl, chainId }: {
    rpcUrl: string;
    chainId: number;
}): {
    networkMiddleware: import("json-rpc-engine").JsonRpcMiddleware<unknown, unknown>;
    blockTracker: PollingBlockTracker;
};