import { PollingBlockTracker } from 'eth-block-tracker';
export default function createJsonRpcClient({ rpcUrl, chainId, venlyConnect }: any): {
    networkMiddleware: import("@metamask/json-rpc-engine").JsonRpcMiddleware<import("@metamask/utils").JsonRpcParams, import("@metamask/utils").Json>;
    blockTracker: PollingBlockTracker;
};