/**
 * Decode base64 string from an array
 * @param {BufferSource} bufferSource
 * @returns {string}
 */
declare function arrayToBase64(bufferSource: ArrayBuffer): string;
/**
 * Encode base64 string into an array
 * @param {String} base64String
 * @returns {Uint8Array}
 */
declare function base64ToArray(base64String: string): Uint8Array;
/**
 * Decode string from an array
 * @param {BufferSource} bufferSource
 * @returns {string}
 */
declare function arrayToString(bufferSource: ArrayBuffer): string;
/**
 * Encode string into an array
 * @param {String} string
 * @returns {Uint8Array}
 */
declare function stringToArray(string: string): Uint8Array;
/**
 * Encode string into base64 string
 * @param {string} string
 * @returns {string}
 */
declare function stringToBase64(string: string): string;
/**
 * Encode JSON object into base64 string
 * @param {Object} json
 * @returns {string}
 */
declare function jsonToBase64(json: object): string;
/**
 * Decode JSON object from base64 string
 * @param {string} b64string
 * @returns {Object}
 */
declare function base64ToJson(b64string: string): object;
/**
 * Decode string from base64 string
 * @param {string} b64string
 * @returns {Object}
 */
declare function base64ToString(b64string: string): string;
/**
 * Transform an array into data URL
 * @param {BufferSource} bufferSource
 * @returns {string}
 */
declare function arrayToDataUrl(bufferSource: ArrayBuffer): string;
/**
 * Transform data URL into an array
 * @param {string} dataUrl
 * @returns {Promise.<Uint8Array>}
 */
declare function dataUrlToArray(dataUrl: string): Promise<Uint8Array>;
/**
 * Transform file blob into an array
 * @param {Blob} blob
 * @returns {Promise.<Uint8Array>}
 */
declare function blobToArray(blob: Blob): Promise<Uint8Array>;
declare function arrayBufferToArray(arrayBuffer: ArrayBuffer): Uint8Array;
declare function mergeBuffers(buffer1: ArrayBuffer, buffer2: ArrayBuffer): ArrayBufferLike;
export { arrayToBase64, base64ToArray, base64ToString, stringToBase64, arrayToString, stringToArray, jsonToBase64, base64ToJson, arrayToDataUrl, dataUrlToArray, blobToArray, arrayBufferToArray, mergeBuffers, };