Added api support of invoice payments for credits.

Telegram/SourceFiles/payments/payments_checkout_process.cpp

@@ -139,6 +139,28 @@ void CheckoutProcess::Start(
 	j->second->requestActivate();
 }
 
+void CheckoutProcess::Start(
+		InvoiceCredits creditsInvoice,
+		Fn<void(CheckoutResult)> reactivate) {
+	const auto randomId = creditsInvoice.randomId;
+	auto id = InvoiceId{ std::move(creditsInvoice) };
+	auto &processes = LookupSessionProcesses(SessionFromId(id));
+	const auto i = processes.byRandomId.find(randomId);
+	if (i != end(processes.byRandomId)) {
+		i->second->setReactivateCallback(std::move(reactivate));
+		i->second->requestActivate();
+		return;
+	}
+	const auto j = processes.byRandomId.emplace(
+		randomId,
+		std::make_unique<CheckoutProcess>(
+			std::move(id),
+			Mode::Payment,
+			std::move(reactivate),
+			PrivateTag{})).first;
+	j->second->requestActivate();
+}
+
 std::optional<PaidInvoice> CheckoutProcess::InvoicePaid(
 		not_null<const HistoryItem*> item) {
 	const auto session = &item->history()->session();

Telegram/SourceFiles/payments/payments_checkout_process.h

@@ -37,6 +37,7 @@ namespace Payments {
 class Form;
 struct FormUpdate;
 struct Error;
+struct InvoiceCredits;
 struct InvoiceId;
 struct InvoicePremiumGiftCode;
 
@@ -73,6 +74,9 @@ public:
 	static void Start(
 		InvoicePremiumGiftCode giftCodeInvoice,
 		Fn<void(CheckoutResult)> reactivate);
+	static void Start(
+		InvoiceCredits creditsInvoice,
+		Fn<void(CheckoutResult)> reactivate);
 	[[nodiscard]] static std::optional<PaidInvoice> InvoicePaid(
 		not_null<const HistoryItem*> item);
 	[[nodiscard]] static std::optional<PaidInvoice> InvoicePaid(

Telegram/SourceFiles/payments/payments_form.cpp

@@ -117,6 +117,8 @@ not_null<Main::Session*> SessionFromId(const InvoiceId &id) {
 		return &message->peer->session();
 	} else if (const auto slug = std::get_if<InvoiceSlug>(&id.value)) {
 		return slug->session;
+	} else if (const auto slug = std::get_if<InvoiceCredits>(&id.value)) {
+		return slug->session;
 	}
 	const auto &giftCode = v::get<InvoicePremiumGiftCode>(id.value);
 	const auto users = std::get_if<InvoicePremiumGiftCodeUsers>(
@@ -314,6 +316,15 @@ MTPInputInvoice Form::inputInvoice() const {
 			MTP_int(message->itemId.bare));
 	} else if (const auto slug = std::get_if<InvoiceSlug>(&_id.value)) {
 		return MTP_inputInvoiceSlug(MTP_string(slug->slug));
+	} else if (const auto credits = std::get_if<InvoiceCredits>(&_id.value)) {
+		return MTP_inputInvoiceStars(MTP_starsTopupOption(
+			credits->product.isEmpty()
+				? MTP_flags(0)
+				: MTP_flags(MTPDstarsTopupOption::Flag::f_store_product),
+			MTP_long(credits->credits),
+			MTP_string(credits->product),
+			MTP_string(credits->currency),
+			MTP_long(credits->amount)));
 	}
 	const auto &giftCode = v::get<InvoicePremiumGiftCode>(_id.value);
 	using Flag = MTPDpremiumGiftCodeOption::Flag;

Telegram/SourceFiles/payments/payments_form.h

@@ -216,8 +216,21 @@ struct InvoicePremiumGiftCode {
 	int months = 0;
 };
 
+struct InvoiceCredits {
+	not_null<Main::Session*> session;
+	uint64 randomId = 0;
+	uint64 credits = 0;
+	QString product;
+	QString currency;
+	uint64 amount = 0;
+};
+
 struct InvoiceId {
-	std::variant<InvoiceMessage, InvoiceSlug, InvoicePremiumGiftCode> value;
+	std::variant<
+		InvoiceMessage,
+		InvoiceSlug,
+		InvoicePremiumGiftCode,
+		InvoiceCredits> value;
 };
 
 [[nodiscard]] not_null<Main::Session*> SessionFromId(const InvoiceId &id);