tryCatch.ts

// Utility function for try-catch,
// handle promises, where error is always of type Error.
// The function returns tuple [data, error], where data is result of promise and error is error if promise is rejected.
// Usage:

// const [productData, productError] = await tryCatch(getProduct(1))
// if (error) throw new Error(productError.message || 'Cannot get product data', {cause: productError})
// else console.log(data)

type SuccessResults<T> = readonly [T, null]
type ErrorResults<E = Error> = readonly [null, E]
type Result<T, E = Error> = SuccessResults<T> | ErrorResults<E>

export const tryCatch = async <T, E = Error>(promise: Promise<T>): Promise<Result<T, E>> => {
  try {
    const data = await promise;
    return [data, null] as const;
  } catch (error) {
    return [null, error as E] as const;
  }
}