export declare function createPendingNonceMiddleware({ getPendingNonce }: any): import("json-rpc-engine").JsonRpcMiddleware<unknown, unknown>;
export declare function createTransactionByHashMiddleware({ getTransactionByHash }: any): import("json-rpc-engine").JsonRpcMiddleware<unknown, unknown>;
export declare function createPendingTransactionsMiddleware({ getPendingTransactions }: any): import("json-rpc-engine").JsonRpcMiddleware<unknown, unknown>;