import { Context, Session } from 'koishi';
import { Config } from '../config';
declare module '../index' {
    interface MemeInternal {
        getInfoFromID(session: Session, userId: string, forceFallback?: boolean): Promise<ImageAndUserInfo>;
    }
}
export type UserInfoGender = 'male' | 'female' | 'unknown';
export interface UserInfo {
    name?: string;
    gender?: UserInfoGender;
}
export interface ImageAndUserInfo {
    url: string;
    userInfo: UserInfo;
}
export declare class GetAvatarFailedError extends Error {
    readonly platform: string;
    readonly userId: string;
    constructor(platform: string, userId: string);
}
export declare function apply(ctx: Context, config: Config): Promise<void>;