I recently made this class to treat error as a value in typescript, i want to do in a way that you could chain methods that expects and returns Response

return-pattern.ts:

// import { APIErrors } from "../errors/api-errors";

type SuccessResponse<T> = [null, T];
type Err = {message: string, stack: string, name: string}
type ErrResponse = [Err, null];

export type HandleResponse<T> = SuccessResponse<T> | ErrResponse;

export class Response<T> {
  private _data: T | null
  private _err: Err | null

  private constructor (data:T | null ,err: Err | null) {
    this._data = data
    this._err = err
  }

  static success<T>(data: T): Response<T> {
    return new Response(data, null)
  }

  static err<T>(err: Err): Response<T> {
    return new Response(null, err) as Response<T>
  }

  bind<R>(func: (res: Response<T>) => Response<R> ): Response<R> {
    if (this._err) {
      return Response.err(this._err) as Response<R>;
    }

    return func(this);
  }

  async bindAsync<R>(func: (res: Response<T>) => Promise<Response<R>>): Promise<Response<R>> {
    if (this._err) {
      return Response.err(this._err) as Response<R>;
    }
    

    return await func(this);
  }


  divide(): HandleResponse<T> {
    if (this._data) return [null, this._data];
    return [this._err as Err, null];
  }

}

Use case example:

// ...
async function chaining() {
  
  const addTen = async (res: Response<number>) => {
    const num = res.data() as number;
    return Response.success(num + 10);
  }

  return  Response.success(5)
    .bindAsync(addTen)
}

async function chainingMoreThanOne() {
  
  const addTen = async (res: Response<number>) => {
    const num = res.data() as number;
    return Response.success(num + 10);
  }

  return  Response.success(5)
    .bindAsync(addTen)
    .bindAsync(addTen) // Here you got a error

}



main()

And the error is:

Property 'bindAsync' does not exist on type 'Promise<Response<createProductDTO>>'.

How would I do this bindAsync in a way that a can chain it indefinetily?

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