import { CreateTranscriptOptions, GenerateFromMessagesOpts, ValidTextChannels } from './types';
export declare function downloadImageToDataURL(url: string): Promise<string | null>;
export declare const charCodeUTF32: (char: string) => number;
export declare function castToType<T>(type: any): T;
export declare function optsSetup<T extends CreateTranscriptOptions | GenerateFromMessagesOpts>(opts: T | undefined, _channel: ValidTextChannels): T;