export declare const blobToArrayBuffer: (blob: Blob) => Promise<string | ArrayBuffer>;
export declare const canvasToBlob: (canvas: HTMLCanvasElement) => Promise<Blob>;
export declare const arrayBufferToDataUrl: (buffer: ArrayBuffer, mimeType: string) => Promise<string>;
/** Draws an emoji onto a 16:9 canvas, so it can be used as a space image. */
export declare const emojiToImage: (emoji: string) => Promise<ArrayBuffer | string>;