import { ReqMiddlewareFn } from "@zilliqa-js/core";
import { TxReceipt, TxParams } from "./types";
import { Buffer } from "buffer";
export declare const encodeTransactionProto: (tx: TxParams) => Buffer;
export declare const isTxReceipt: (x: unknown) => x is TxReceipt;
export declare const isTxParams: (obj: unknown) => obj is TxParams;
export declare const formatOutgoingTx: ReqMiddlewareFn<[TxParams]>;
export declare function sleep(ms: number): Promise<unknown>;
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