/// <reference types="node" />
/// <reference types="node" />
import { Transaction } from '@opcat-labs/opcat';
import { FixedArray } from '../smart-contract/types/index.js';
/**
 * Converts a Uint8Array to a hexadecimal string.
 * @param {Uint8Array} bytes - The input array of bytes.
 * @returns {string} The hexadecimal representation of the input bytes.
 */
export declare function uint8ArrayToHex(bytes: Uint8Array): string;
/**
 * Converts a hexadecimal string to a Uint8Array.
 * @param {string} hex - The hexadecimal string.
 * @returns {Uint8Array} The resulting Uint8Array.
 */
export declare function hexToUint8Array(hex: string): Uint8Array;
/**
 * create a FixedArray and fill it with initial value
 * @param value
 * @param len
 * @returns
 */
export declare function fillFixedArray<T, Length extends number>(value: T, len: Length): FixedArray<T, Length>;
/** @ignore */
export declare function requireTrue(res: boolean, message: string): void;
/** @ignore */
export declare function getTxId(input: Transaction.Input): string;
/** @ignore */
export declare function cloneDeep<T>(obj: T, hash?: WeakMap<WeakKey, any>): T;
/**
 * convert satoshi to hex in little-endian order
 * @param value
 * @returns
 */
export declare function satoshiToHex(value: bigint): string;
/**
 * convert utf8 text to hex string
 * @param text
 * @returns
 */
export declare function textToHex(text: string): string;
export declare function duplicateFilter<T>(uniqueFn: (item: T) => any): (value: T, index: number, arr: T[]) => boolean;
export declare function isFinal(sequenceNumber: number): boolean;
export declare function toHex(val: Buffer | string | Uint8Array): string;
/**
 * Converts a Opcat address to its public key hash (PKH) in hex format.
 * @param address - The Opcat address to convert.
 * @returns The public key hash as a hex string.
 */
export declare function addrToPkh(address: string): string;
export declare function pushData(data: Buffer): Buffer;
export declare function splitChunks<T extends Buffer | string | Array<any>>(buffer: T, chunkSize: number): T[];
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