/// <reference types="node" resolution-mode="require"/>
import { type BaseClass } from './BaseClass.js';
/**
 * An implementation to fetch audio related data.
 */
export interface Audio extends BaseClass {
    /**
     * The external URL to the audio file. Expects a WAV file.
     */
    resourceUrl: string;
    /**
     * A place to store the buffer of the audio file.
     */
    buffer?: Buffer;
    toBuffer(): Promise<Buffer | undefined>;
    toBase64(): Promise<string | undefined>;
    toDisk(location: `${string}.wav`): Promise<void>;
}
/**
 * Fetch a buffer of the audio file using the {@link Audio.resourceUrl}.
 *
 * The format of the audio file is WAV.
 *
 * @param this The class that implements this {@link Audio} interface.
 * @returns A buffer of the audio file.
 */
export declare function implToBuffer(this: Audio): Promise<Buffer | undefined>;
/**
 * Convert the audio file to a base64 string.
 * Useful for when you want to send the audio file in a format restricted HTTP request.
 *
 * The format of the audio file is WAV.
 *
 * @param this The class that implements this {@link Audio} interface.
 * @returns A base64 string of the audio file.
 */
export declare function implToBase64(this: Audio): Promise<string | undefined>;
/**
 * Write the audio file locally to disk.
 *
 * The format of the audio file is WAV.
 *
 * @param this The class that implements this {@link Audio} interface.
 * @param location The location to write the audio file to. Relative to the current working file.
 */
export declare function implToDisk(this: Audio, location: `${string}.wav`): Promise<void>;