import type { ImageBackend, ImageParams, ImageResult } from './types.js';
export declare class BFLBackend implements ImageBackend {
    readonly name: "bfl";
    private client;
    constructor(apiKey: string);
    isAvailable(): boolean;
    generate(params: ImageParams): Promise<ImageResult>;
    getStatus(id: string): Promise<ImageResult>;
    /**
     * 处理输入图像，转换为 base64
     */
    private processInputImages;
    /**
     * 将输入图像映射到 BFL 参数
     */
    private mapInputImages;
}
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