index.ts

  private async $request<R extends Runtype<any>>(config: AxiosRequestConfig, type?: R): Promise<Static<R>> {
    // serialize to JSON
    if (config.data && isObject(config.data)) {
      config.data = JSON.stringify(config.data)
    }

    const { data, status, statusText } = await this.axios.request<any, AxiosResponse<Static<R>>>(config)

    if (status === 204) {
      return
    }

    if (status >= 400) {
      // Well-known, internally defined, API errors
      if (Errors.guard(data)) {
        // throws only the first error, but theoretically there can be more errors
        throw new ApiError(data.errors[0])
      } else {
        throw new ApiUnknownError(status, statusText)
      }
    }

    if (type) {
      const res = type.validate(data)

      if (!res.success) {
        throw new ApiValidationError(res, config)
      }
    }

    return data
  }