From ea288f912a1fee35902936baaf2f3e2818083003 Mon Sep 17 00:00:00 2001
From: zubiden <19638254+zubiden@users.noreply.github.com>
Date: Mon, 22 Dec 2025 22:54:27 +0100
Subject: [PATCH] Stars: Pass payment purpose to server (#6545)

---
 src/api/gramjs/gramjsBuilders/index.ts        |  8 +++++--
 src/api/types/payments.ts                     |  2 ++
 .../modals/stars/StarsBalanceModal.tsx        | 22 +++++++++++++++++++
 src/global/helpers/payments.ts                |  5 ++++-
 4 files changed, 34 insertions(+), 3 deletions(-)

diff --git a/src/api/gramjs/gramjsBuilders/index.ts b/src/api/gramjs/gramjsBuilders/index.ts
index 0f453b571..94edb0ffe 100644
--- a/src/api/gramjs/gramjsBuilders/index.ts
+++ b/src/api/gramjs/gramjsBuilders/index.ts
@@ -615,13 +615,17 @@ export function buildInputPhoneCall({ id, accessHash }: ApiPhoneCall) {
   });
 }
 
-export function buildInputStorePaymentPurpose(purpose: ApiInputStorePaymentPurpose):
-GramJs.TypeInputStorePaymentPurpose {
+export function buildInputStorePaymentPurpose(
+  purpose: ApiInputStorePaymentPurpose,
+): GramJs.TypeInputStorePaymentPurpose {
   if (purpose.type === 'stars') {
     return new GramJs.InputStorePaymentStarsTopup({
       stars: BigInt(purpose.stars),
       currency: purpose.currency,
       amount: BigInt(purpose.amount),
+      spendPurposePeer: purpose.spendPurposePeer
+        ? buildInputPeer(purpose.spendPurposePeer.id, purpose.spendPurposePeer.accessHash)
+        : undefined,
     });
   }
 
diff --git a/src/api/types/payments.ts b/src/api/types/payments.ts
index 327aa3644..f3460a76f 100644
--- a/src/api/types/payments.ts
+++ b/src/api/types/payments.ts
@@ -163,6 +163,7 @@ export type ApiInputStorePaymentStarsTopup = {
   stars: number;
   currency: string;
   amount: number;
+  spendPurposePeer?: ApiPeer;
 };
 
 export type ApiInputStorePaymentStarsGift = {
@@ -341,6 +342,7 @@ export type ApiInputInvoiceStars = {
   stars: number;
   currency: string;
   amount: number;
+  spendPurposePeerId?: string;
 };
 
 export type ApiInputInvoiceStarsGift = {
diff --git a/src/components/modals/stars/StarsBalanceModal.tsx b/src/components/modals/stars/StarsBalanceModal.tsx
index 99f31bc61..cb9ffaf91 100644
--- a/src/components/modals/stars/StarsBalanceModal.tsx
+++ b/src/components/modals/stars/StarsBalanceModal.tsx
@@ -310,11 +310,33 @@ const StarsBalanceModal = ({
   });
 
   const handleBuyStars = useLastCallback((option: ApiStarTopupOption) => {
+    const originPaymentInputInvoice = originStarsPayment?.inputInvoice;
+
+    let spendPurposePeerId: string | undefined;
+
+    switch (originPaymentInputInvoice?.type) {
+      case 'message': {
+        spendPurposePeerId = originPaymentInputInvoice.chatId;
+        break;
+      }
+
+      case 'slug': {
+        const form = originStarsPayment?.form;
+        spendPurposePeerId = form?.botId;
+        break;
+      }
+    }
+
+    if (originReaction) {
+      spendPurposePeerId = originReaction.chatId;
+    }
+
     openInvoice({
       type: 'stars',
       stars: option.stars,
       currency: option.currency,
       amount: option.amount,
+      spendPurposePeerId,
     });
   });
 
diff --git a/src/global/helpers/payments.ts b/src/global/helpers/payments.ts
index ba8c5d3b7..13b2f2289 100644
--- a/src/global/helpers/payments.ts
+++ b/src/global/helpers/payments.ts
@@ -79,9 +79,11 @@ export function getRequestInputInvoice<T extends GlobalState>(
 
   if (inputInvoice.type === 'stars') {
     const {
-      stars, amount, currency,
+      stars, amount, currency, spendPurposePeerId,
     } = inputInvoice;
 
+    const spendPurposePeer = spendPurposePeerId ? selectPeer(global, spendPurposePeerId) : undefined;
+
     return {
       type: 'stars',
       purpose: {
@@ -89,6 +91,7 @@ export function getRequestInputInvoice<T extends GlobalState>(
         stars,
         amount,
         currency,
+        spendPurposePeer,
       },
     };
   }