🎉 init

app/utils/paymentLinkCache.ts

@@ -0,0 +1,11 @@
+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)
+}