export declare class Chain {
    private chain;
    private fallbackValue?;
    root?: string;
    option?: {
        pretty?: boolean;
    };
    sourcePath?: string;
    constructor(root?: string);
    get action(): Promise<unknown>;
    private saveTemp;
    modify(callback?: (io: unknown) => unknown): this;
    onFail(callback?: () => unknown): this;
    then(callback: (value: unknown) => unknown): Promise<unknown>;
    catch(callback: (reason: unknown) => unknown): Promise<unknown>;
    finally(callback: () => void): Promise<unknown>;
    config(option: {
        pretty?: boolean;
    }): this;
    source(path: string, root?: string | undefined): this;
    output(path?: string | undefined, root?: string | undefined): this;
    encode(): this;
    decode<T>(): this;
    logger(...message: unknown[]): this;
}