import * as fs from 'fs';
interface Entity {
    id: string | number;
    [key: string]: any;
}
export declare class LocalDB<T extends Entity> {
    private tableName;
    private db;
    constructor(tableName: string);
    private init;
    insert(entity: T): Promise<void>;
    findById(id: string | number): Promise<T | undefined>;
    findAll(): Promise<T[]>;
    delete(id: string | number): Promise<void>;
    close(): Promise<void>;
}
declare class DiskStorage {
    #private;
    constructor();
    get(filename: string): Promise<Buffer | null>;
    set(filename: string, data: string | Buffer, options?: fs.WriteFileOptions): Promise<void>;
    delete(filename: string): Promise<void>;
    getSync(filename: string): Buffer | null;
    setSync(filename: string, data: string | Buffer, options?: fs.WriteFileOptions): void;
    getStoragePath(filename: string): string;
    deleteSync(filename: string): void;
}
interface SettingItem extends Entity {
    MODEL_INDEX: number;
    [key: string]: any;
}
interface OcrItem extends Entity {
    filename: string;
    text?: string;
    createTime: number;
}
interface SystemPromptItem extends Entity {
    name: string;
    content: string;
}
export declare const diskStorage: DiskStorage;
export declare const settingDB: LocalDB<SettingItem>;
export declare const ocrDB: LocalDB<OcrItem>;
export declare const systemPromptDB: LocalDB<SystemPromptItem>;
export {};