From bd658d336a1fdadea45ec42e30f20699be9e4858 Mon Sep 17 00:00:00 2001
From: levlam <levlam@telegram.org>
Date: Fri, 27 Feb 2026 14:22:40 +0300
Subject: [PATCH] Add setChatMemberTag.

---
 telegram-bot-api/Client.cpp | 25 +++++++++++++++++++++++--
 telegram-bot-api/Client.h   |  1 +
 2 files changed, 24 insertions(+), 2 deletions(-)

diff --git a/telegram-bot-api/Client.cpp b/telegram-bot-api/Client.cpp
index 423a13b..944905e 100644
--- a/telegram-bot-api/Client.cpp
+++ b/telegram-bot-api/Client.cpp
@@ -339,6 +339,7 @@ bool Client::init_methods() {
   methods_.emplace("leavechat", &Client::process_leave_chat_query);
   methods_.emplace("promotechatmember", &Client::process_promote_chat_member_query);
   methods_.emplace("setchatadministratorcustomtitle", &Client::process_set_chat_administrator_custom_title_query);
+  methods_.emplace("setchatmembertag", &Client::process_set_chat_member_tag_query);
   methods_.emplace("banchatmember", &Client::process_ban_chat_member_query);
   methods_.emplace("kickchatmember", &Client::process_ban_chat_member_query);
   methods_.emplace("restrictchatmember", &Client::process_restrict_chat_member_query);
@@ -14573,8 +14574,9 @@ td::Status Client::process_set_chat_administrator_custom_title_query(PromisedQue
   TRY_RESULT(user_id, get_user_id(query.get()));
 
   check_chat(chat_id, AccessRights::Write, std::move(query), [this, user_id](int64 chat_id, PromisedQueryPtr query) {
-    if (get_chat_type(chat_id) != ChatType::Supergroup) {
-      return fail_query(400, "Bad Request: method is available only for supergroups", std::move(query));
+    auto chat_type = get_chat_type(chat_id);
+    if (chat_type != ChatType::Group && chat_type != ChatType::Supergroup) {
+      return fail_query(400, "Bad Request: method is available only for groups and supergroups", std::move(query));
     }
 
     get_chat_member(
@@ -14600,6 +14602,25 @@ td::Status Client::process_set_chat_administrator_custom_title_query(PromisedQue
   return td::Status::OK();
 }
 
+td::Status Client::process_set_chat_member_tag_query(PromisedQueryPtr &query) {
+  auto chat_id = query->arg("chat_id");
+  TRY_RESULT(user_id, get_user_id(query.get()));
+
+  check_chat(chat_id, AccessRights::Write, std::move(query), [this, user_id](int64 chat_id, PromisedQueryPtr query) {
+    auto chat_type = get_chat_type(chat_id);
+    if (chat_type != ChatType::Group && chat_type != ChatType::Supergroup) {
+      return fail_query(400, "Bad Request: method is available only for groups and supergroups", std::move(query));
+    }
+
+    check_user_no_fail(user_id, std::move(query), [this, chat_id, user_id](PromisedQueryPtr query) {
+      auto tag = query->arg("tag").str();
+      send_request(make_object<td_api::setChatMemberTag>(chat_id, user_id, tag),
+                   td::make_unique<TdOnOkQueryCallback>(std::move(query)));
+    });
+  });
+  return td::Status::OK();
+}
+
 td::Status Client::process_ban_chat_member_query(PromisedQueryPtr &query) {
   auto chat_id = query->arg("chat_id");
   TRY_RESULT(user_id, get_user_id(query.get()));
diff --git a/telegram-bot-api/Client.h b/telegram-bot-api/Client.h
index 46bc25f..a72f7b2 100644
--- a/telegram-bot-api/Client.h
+++ b/telegram-bot-api/Client.h
@@ -877,6 +877,7 @@ class Client final : public WebhookActor::Callback {
   td::Status process_leave_chat_query(PromisedQueryPtr &query);
   td::Status process_promote_chat_member_query(PromisedQueryPtr &query);
   td::Status process_set_chat_administrator_custom_title_query(PromisedQueryPtr &query);
+  td::Status process_set_chat_member_tag_query(PromisedQueryPtr &query);
   td::Status process_ban_chat_member_query(PromisedQueryPtr &query);
   td::Status process_restrict_chat_member_query(PromisedQueryPtr &query);
   td::Status process_unban_chat_member_query(PromisedQueryPtr &query);