/**
 * Configuration options for avatar handling.
 */
export type AvatarConfig = {
    /**
     * Delete the current avatar (e.g. remove from storage).
     * Gets called after the user's avatar is updated to null.
     */
    delete?: (url: string) => Promise<void>;
    /**
     * Whether avatar changing is enabled.
     * @default true
     */
    enabled: boolean;
    /**
     * Output image format.
     * @default "png"
     */
    extension: "png" | "jpg" | "webp" | "inherit";
    /**
     * Resize an image file before upload. Overrides the default resize behavior.
     * @default Resizes to `size` pixels, square-cropped, output as `extension`.
     */
    resize: (file: File, size?: number, extension?: "png" | "jpg" | "webp" | "inherit") => Promise<File>;
    /**
     * Max dimension in pixels for the optimized avatar.
     * @default 256
     */
    size: number;
    /**
     * Upload a file and return the URL where it was stored.
     * When undefined, a compact data URL is saved directly to `user.image`.
     * The fallback is optimized for session cookie caches, while uploaded files
     * keep the size and format produced by {@link resize}.
     */
    upload?: (file: File) => Promise<string>;
};