fix: stripe portal dead-end with callback return flow (#67)

Co-authored-by: userAdityaa <aditya.chaudhary1558@gmail.com>
Co-committed-by: userAdityaa <aditya.chaudhary1558@gmail.com>

frontend/src/components/PaymentSetup.tsx

@@ -40,7 +40,7 @@ export default function PaymentSetup(props: PaymentSetupProps) {
     setRedirecting(true)
     setError("")
     try {
-      const { url } = await createPortalSession(account()!.pubkey)
+      const { url } = await createPortalSession(account()!.pubkey, window.location.href)
       window.location.href = url
     } catch (e) {
       setError(e instanceof Error ? e.message : "Failed to open billing portal")

frontend/src/lib/api.ts

@@ -253,8 +253,9 @@ export function reactivateRelay(id: string) {
   return callApi<undefined, void>("POST", `/relays/${id}/reactivate`)
 }
 
-export function createPortalSession(pubkey: string) {
-  return callApi<undefined, { url: string }>("GET", `/tenants/${pubkey}/stripe/session`)
+export function createPortalSession(pubkey: string, returnUrl?: string) {
+  const query = returnUrl ? `?return_url=${encodeURIComponent(returnUrl)}` : ""
+  return callApi<undefined, { url: string }>("GET", `/tenants/${pubkey}/stripe/session${query}`)
 }
 
 export function getInvoiceBolt11(invoiceId: string) {

frontend/src/pages/Account.tsx

@@ -49,7 +49,7 @@ export default function Account() {
   async function openPortal() {
     setPortalLoading(true)
     try {
-      const { url } = await createPortalSession(account()!.pubkey)
+      const { url } = await createPortalSession(account()!.pubkey, window.location.href)
       window.location.href = url
     } catch (e) {
       setError(e instanceof Error ? e.message : "Failed to open billing portal")