import { Block, JRPCMiddleware } from "@web3auth/auth";
import { CustomChainConfig } from "@web3auth/base";
export declare function createChainIdMiddleware(chainId: string): JRPCMiddleware<unknown, string>;
export declare function createProviderConfigMiddleware(providerConfig: CustomChainConfig): JRPCMiddleware<unknown, CustomChainConfig>;
export declare function createConfigMiddleware(providerConfig: CustomChainConfig): JRPCMiddleware<unknown, unknown>;
export declare function createJsonRpcClient(providerConfig: CustomChainConfig): {
    networkMiddleware: JRPCMiddleware<unknown, unknown>;
    fetchMiddleware: JRPCMiddleware<string[], Block>;
};