const STORAGE_KEY = 'stb:last-payment-link'

type StorageLike = Pick<Storage, 'getItem' | 'setItem'>

export function readCachedPaymentLink(storage: StorageLike): string | null {
  return storage.getItem(STORAGE_KEY) || null
}

export function writeCachedPaymentLink(storage: StorageLike, link: string): void {
  storage.setItem(STORAGE_KEY, link)
}