Check if the resale gift price changed.

Telegram/Resources/langs/lang.strings

@@ -3473,6 +3473,8 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 "lng_gift_buy_resale_button" = "Buy for {cost}";
 "lng_gift_buy_resale_confirm" = "Do you want to buy {name} for {price} and gift it to {user}?";
 "lng_gift_buy_resale_confirm_self" = "Do you want to buy {name} for {price}?";
+"lng_gift_buy_price_change_title" = "Price change!";
+"lng_gift_buy_price_change_text" = "This gift price was changed and now is {price}. Do you still want to buy?";
 "lng_gift_sent_title" = "Gift Sent!";
 "lng_gift_sent_resale_done" = "{user} has been notified about your gift.";
 "lng_gift_sent_resale_done_self" = "{gift} is now yours.";

Telegram/SourceFiles/boxes/star_gift_box.cpp

@@ -1954,61 +1954,6 @@ void SendStarsFormRequest(
 	}
 }
 
-void SubmitStarsForm(
-		std::shared_ptr<Main::SessionShow> show,
-		MTPInputInvoice invoice,
-		uint64 formId,
-		uint64 price,
-		Fn<void(Payments::CheckoutResult, const MTPUpdates *)> done) {
-	const auto ready = [=](Settings::SmallBalanceResult result) {
-		SendStarsFormRequest(show, result, formId, invoice, done);
-	};
-	Settings::MaybeRequestBalanceIncrease(
-		show,
-		price,
-		Settings::SmallBalanceDeepLink{},
-		ready);
-}
-
-void RequestStarsForm(
-	std::shared_ptr<Main::SessionShow> show,
-	MTPInputInvoice invoice,
-	Fn<void(
-		uint64 formId,
-		uint64 price,
-		std::optional<Payments::CheckoutResult> failure)> done) {
-	const auto fail = [=](Payments::CheckoutResult failure) {
-		done(0, 0, failure);
-	};
-	show->session().api().request(MTPpayments_GetPaymentForm(
-		MTP_flags(0),
-		invoice,
-		MTPDataJSON() // theme_params
-	)).done([=](const MTPpayments_PaymentForm &result) {
-		result.match([&](const MTPDpayments_paymentFormStarGift &data) {
-			const auto prices = data.vinvoice().data().vprices().v;
-			if (show->valid() && !prices.isEmpty()) {
-				const auto price = prices.front().data().vamount().v;
-				done(data.vform_id().v, price, std::nullopt);
-			} else {
-				fail(Payments::CheckoutResult::Failed);
-			}
-		}, [&](const auto &) {
-			fail(Payments::CheckoutResult::Failed);
-		});
-	}).fail([=](const MTP::Error &error) {
-		const auto type = error.type();
-		if (type == u"STARGIFT_EXPORT_IN_PROGRESS"_q) {
-			fail(Payments::CheckoutResult::Cancelled);
-		} else if (type == u"NO_PAYMENT_NEEDED"_q) {
-			fail(Payments::CheckoutResult::Free);
-		} else {
-			show->showToast(type);
-			fail(Payments::CheckoutResult::Failed);
-		}
-	}).send();
-}
-
 void UpgradeGift(
 		not_null<Window::SessionController*> window,
 		Data::SavedStarGiftId savedId,
@@ -4891,6 +4836,61 @@ void AddUniqueCloseButton(
 	}
 }
 
+void SubmitStarsForm(
+		std::shared_ptr<Main::SessionShow> show,
+		MTPInputInvoice invoice,
+		uint64 formId,
+		uint64 price,
+		Fn<void(Payments::CheckoutResult, const MTPUpdates *)> done) {
+	const auto ready = [=](Settings::SmallBalanceResult result) {
+		SendStarsFormRequest(show, result, formId, invoice, done);
+	};
+	Settings::MaybeRequestBalanceIncrease(
+		show,
+		price,
+		Settings::SmallBalanceDeepLink{},
+		ready);
+}
+
+void RequestStarsForm(
+	std::shared_ptr<Main::SessionShow> show,
+	MTPInputInvoice invoice,
+	Fn<void(
+		uint64 formId,
+		uint64 price,
+		std::optional<Payments::CheckoutResult> failure)> done) {
+	const auto fail = [=](Payments::CheckoutResult failure) {
+		done(0, 0, failure);
+	};
+	show->session().api().request(MTPpayments_GetPaymentForm(
+		MTP_flags(0),
+		invoice,
+		MTPDataJSON() // theme_params
+	)).done([=](const MTPpayments_PaymentForm &result) {
+		result.match([&](const MTPDpayments_paymentFormStarGift &data) {
+			const auto prices = data.vinvoice().data().vprices().v;
+			if (show->valid() && !prices.isEmpty()) {
+				const auto price = prices.front().data().vamount().v;
+				done(data.vform_id().v, price, std::nullopt);
+			} else {
+				fail(Payments::CheckoutResult::Failed);
+			}
+		}, [&](const auto &) {
+			fail(Payments::CheckoutResult::Failed);
+		});
+	}).fail([=](const MTP::Error &error) {
+		const auto type = error.type();
+		if (type == u"STARGIFT_EXPORT_IN_PROGRESS"_q) {
+			fail(Payments::CheckoutResult::Cancelled);
+		} else if (type == u"NO_PAYMENT_NEEDED"_q) {
+			fail(Payments::CheckoutResult::Free);
+		} else {
+			show->showToast(type);
+			fail(Payments::CheckoutResult::Failed);
+		}
+	}).send();
+}
+
 void RequestStarsFormAndSubmit(
 		std::shared_ptr<Main::SessionShow> show,
 		MTPInputInvoice invoice,

Telegram/SourceFiles/boxes/star_gift_box.h

@@ -118,6 +118,19 @@ void AddUniqueCloseButton(
 	Settings::CreditsEntryBoxStyleOverrides st,
 	Fn<void(not_null<PopupMenu*>)> fillMenu = nullptr);
 
+void SubmitStarsForm(
+	std::shared_ptr<Main::SessionShow> show,
+	MTPInputInvoice invoice,
+	uint64 formId,
+	uint64 price,
+	Fn<void(Payments::CheckoutResult, const MTPUpdates *)> done);
+void RequestStarsForm(
+	std::shared_ptr<Main::SessionShow> show,
+	MTPInputInvoice invoice,
+	Fn<void(
+		uint64 formId,
+		uint64 price,
+		std::optional<Payments::CheckoutResult> failure)> done);
 void RequestStarsFormAndSubmit(
 	std::shared_ptr<Main::SessionShow> show,
 	MTPInputInvoice invoice,

Telegram/SourceFiles/boxes/transfer_gift_box.cpp

@@ -489,7 +489,7 @@ void BuyResaleGift(
 		not_null<PeerData*> to,
 		std::shared_ptr<Data::UniqueGift> gift,
 		Fn<void(Payments::CheckoutResult)> done) {
-	auto formDone = [=](
+	auto paymentDone = [=](
 			Payments::CheckoutResult result,
 			const MTPUpdates *updates) {
 		done(result);
@@ -502,10 +502,45 @@ void BuyResaleGift(
 			Ui::ShowResaleGiftBoughtToast(show, to, *gift);
 		}
 	};
-	Ui::RequestStarsFormAndSubmit(
+
-		show,
+	const auto invoice = MTP_inputInvoiceStarGiftResale(
-		MTP_inputInvoiceStarGiftResale(MTP_string(gift->slug), to->input),
+		MTP_string(gift->slug),
-		std::move(formDone));
+		to->input);
+
+	Ui::RequestStarsForm(show, invoice, [=](
+			uint64 formId,
+			uint64 price,
+			std::optional<Payments::CheckoutResult> failure) {
+		const auto submit = [=] {
+			SubmitStarsForm(show, invoice, formId, price, paymentDone);
+		};
+		if (failure) {
+			paymentDone(*failure, nullptr);
+		} else if (price != gift->starsForResale) {
+			const auto cost = Ui::Text::IconEmoji(&st::starIconEmoji).append(
+				Lang::FormatCountDecimal(price));
+			const auto cancelled = [=](Fn<void()> close) {
+				paymentDone(Payments::CheckoutResult::Cancelled, nullptr);
+				close();
+			};
+			show->show(Ui::MakeConfirmBox({
+				.text = tr::lng_gift_buy_price_change_text(
+					tr::now,
+					lt_price,
+					Ui::Text::Wrapped(cost, EntityType::Bold),
+					Ui::Text::WithEntities),
+				.confirmed = [=](Fn<void()> close) { close(); submit(); },
+				.cancelled = cancelled,
+				.confirmText = tr::lng_gift_buy_resale_button(
+					lt_cost,
+					rpl::single(cost),
+					Ui::Text::WithEntities),
+				.title = tr::lng_gift_buy_price_change_title(),
+			}));
+		} else {
+			submit();
+		}
+	});
 }
 
 } // namespace