/**
 * Function to convert Base64 string to Buffer.
 *
 * @ignore
 * @param base64String Base64 string to be converted to Buffer.
 * @returns
 */
export declare function base64ToBuffer(base64String: string): ArrayBuffer;
/**
 * Function to convert UTF8 string to Buffer.
 *
 * @ignore
 * @param utf8String UTF8 string to be converted to Buffer.
 * @returns
 */
export declare function utf8ToBuffer(utf8String: string): ArrayBuffer;
/**
 * Function to convert Buffer to Base64 string.
 *
 * @ignore
 * @param buffer Buffer to be converted to Base64 string.
 * @returns
 */
export declare function bufferToBase64(buffer: ArrayBuffer): string;
/**
 * Function to convert Buffer to UTF8 string.
 *
 * @ignore
 * @param arrayBuffer Buffer to be converted to UTF8 string.
 * @returns
 */
export declare function bufferToUtf8(arrayBuffer: ArrayBuffer): string;
/**
 * Function to merge Buffers into a single Buffer.
 *
 * @ignore
 * @param arrayOfBuffers Array of Buffers to be merged.
 * @returns
 */
export declare function concatBuffers(arrayOfBuffers: ArrayBuffer[]): ArrayBuffer;