diff --git a/td/generate/scheme/td_api.tl b/td/generate/scheme/td_api.tl
index 1c76c681..5572374b 100644
--- a/td/generate/scheme/td_api.tl
+++ b/td/generate/scheme/td_api.tl
@@ -1969,6 +1969,16 @@ background id:int64 is_default:Bool is_dark:Bool name:string document:document t
 backgrounds backgrounds:vector<background> = Backgrounds;
 
 
+//@class InputBackground @description Contains information about background to set
+
+//@description A background from a local file
+//@background Background file to use. Only inputFileLocal and inputFileGenerated are supported. The file nust be in JPEG format for wallpapers and in PNG format for patterns
+inputBackgroundLocal background:InputFile = InputBackground;
+
+//@description A background from the server @background_id The background identifier
+inputBackgroundRemote background_id:int64 = InputBackground;
+
+
 //@description Contains a list of hashtags @hashtags A list of hashtags
 hashtags hashtags:vector<string> = Hashtags;
 
@@ -3611,6 +3621,9 @@ getBackgroundUrl name:string type:BackgroundType = HttpUrl;
 //@description Searches for a background by its name @name The name of the background
 searchBackground name:string = Background;
 
+//@description Sets background as a chosen by the user background @background The input background to use, null for solid backgrounds @type Background type
+setBackground background:InputBackground type:BackgroundType = Background;
+
 
 //@description Returns information about the current localization target. This is an offline request if only_local is true. Can be called before authorization @only_local If true, returns only locally available information without sending network requests
 getLocalizationTargetInfo only_local:Bool = LocalizationTargetInfo;
diff --git a/td/generate/scheme/td_api.tlo b/td/generate/scheme/td_api.tlo
index 7e25d254..aece15ae 100644
Binary files a/td/generate/scheme/td_api.tlo and b/td/generate/scheme/td_api.tlo differ
diff --git a/td/telegram/BackgroundManager.cpp b/td/telegram/BackgroundManager.cpp
index 298d415e..421e4565 100644
--- a/td/telegram/BackgroundManager.cpp
+++ b/td/telegram/BackgroundManager.cpp
@@ -24,6 +24,8 @@
 #include "td/utils/common.h"
 #include "td/utils/misc.h"
 
+#include <algorithm>
+
 namespace td {
 
 class GetBackgroundQuery : public Td::ResultHandler {
@@ -84,7 +86,105 @@ class GetBackgroundsQuery : public Td::ResultHandler {
   }
 };
 
+class InstallBackgroundQuery : public Td::ResultHandler {
+  Promise<Unit> promise_;
+  BackgroundId background_id_;
+  BackgroundType type_;
+
+ public:
+  explicit InstallBackgroundQuery(Promise<Unit> &&promise) : promise_(std::move(promise)) {
+  }
+
+  void send(BackgroundId background_id, int64 access_hash, const BackgroundType &type) {
+    background_id_ = background_id;
+    type_ = type;
+    send_query(G()->net_query_creator().create(create_storer(telegram_api::account_installWallPaper(
+        telegram_api::make_object<telegram_api::inputWallPaper>(background_id.get(), access_hash),
+        get_input_wallpaper_settings(type)))));
+  }
+
+  void on_result(uint64 id, BufferSlice packet) override {
+    auto result_ptr = fetch_result<telegram_api::account_installWallPaper>(packet);
+    if (result_ptr.is_error()) {
+      return on_error(id, result_ptr.move_as_error());
+    }
+
+    td->background_manager_->set_background_id(background_id_, type_);
+    LOG_IF(INFO, !result_ptr.ok()) << "Receive false from account.installWallPaper";
+    promise_.set_value(Unit());
+  }
+
+  void on_error(uint64 id, Status status) override {
+    promise_.set_error(std::move(status));
+  }
+};
+
+class UploadBackgroundQuery : public Td::ResultHandler {
+  Promise<Unit> promise_;
+  FileId file_id_;
+  BackgroundType type_;
+
+ public:
+  explicit UploadBackgroundQuery(Promise<Unit> &&promise) : promise_(std::move(promise)) {
+  }
+
+  void send(FileId file_id, tl_object_ptr<telegram_api::InputFile> &&input_file, const BackgroundType &type) {
+    CHECK(input_file != nullptr);
+    file_id_ = file_id;
+    type_ = type;
+    string mime_type = type.type == BackgroundType::Type::Pattern ? "image/png" : "image/jpeg";
+    send_query(G()->net_query_creator().create(create_storer(
+        telegram_api::account_uploadWallPaper(std::move(input_file), mime_type, get_input_wallpaper_settings(type)))));
+  }
+
+  void on_result(uint64 id, BufferSlice packet) override {
+    auto result_ptr = fetch_result<telegram_api::account_uploadWallPaper>(packet);
+    if (result_ptr.is_error()) {
+      return on_error(id, result_ptr.move_as_error());
+    }
+
+    td->background_manager_->on_uploaded_background_file(file_id_, type_, result_ptr.move_as_ok(), std::move(promise_));
+  }
+
+  void on_error(uint64 id, Status status) override {
+    CHECK(status.is_error());
+    CHECK(file_id_.is_valid());
+    if (begins_with(status.message(), "FILE_PART_") && ends_with(status.message(), "_MISSING")) {
+      // TODO td->background_manager_->on_upload_background_file_part_missing(file_id_, to_integer<int32>(status.message().substr(10)));
+      // return;
+    } else {
+      if (status.code() != 429 && status.code() < 500 && !G()->close_flag()) {
+        td->file_manager_->delete_partial_remote_location(file_id_);
+      }
+    }
+    td->file_manager_->cancel_upload(file_id_);
+    promise_.set_error(std::move(status));
+  }
+};
+
+class BackgroundManager::UploadBackgroundFileCallback : public FileManager::UploadCallback {
+ public:
+  void on_upload_ok(FileId file_id, tl_object_ptr<telegram_api::InputFile> input_file) override {
+    send_closure_later(G()->background_manager(), &BackgroundManager::on_upload_background_file, file_id,
+                       std::move(input_file));
+  }
+
+  void on_upload_encrypted_ok(FileId file_id, tl_object_ptr<telegram_api::InputEncryptedFile> input_file) override {
+    UNREACHABLE();
+  }
+
+  void on_upload_secure_ok(FileId file_id, tl_object_ptr<telegram_api::InputSecureFile> input_file) override {
+    UNREACHABLE();
+  }
+
+  void on_upload_error(FileId file_id, Status error) override {
+    send_closure_later(G()->background_manager(), &BackgroundManager::on_upload_background_file_error, file_id,
+                       std::move(error));
+  }
+};
+
 BackgroundManager::BackgroundManager(Td *td, ActorShared<> parent) : td_(td), parent_(std::move(parent)) {
+  upload_background_file_callback_ = std::make_shared<UploadBackgroundFileCallback>();
 }
 
 void BackgroundManager::tear_down() {
@@ -116,14 +216,6 @@ Result<string> BackgroundManager::get_background_url(const string &name,
   }
   string mode = implode(modes, '+');
 
-  auto get_color_string = [](int32 color) {
-    string result;
-    for (int i = 20; i >= 0; i -= 4) {
-      result += "0123456789abcdef"[(color >> i) & 0xf];
-    }
-    return result;
-  };
-
   string url = PSTRING() << G()->shared_config().get_option_string("t_me_url", "https://t.me/") << "bg/";
   switch (type.type) {
     case BackgroundType::Type::Wallpaper:
@@ -138,14 +230,14 @@ Result<string> BackgroundManager::get_background_url(const string &name,
       url += "?intensity=";
       url += to_string(type.intensity);
       url += "&bg_color=";
-      url += get_color_string(type.color);
+      url += type.get_color_hex_string();
       if (!mode.empty()) {
         url += "&mode=";
         url += mode;
       }
       return url;
     case BackgroundType::Type::Solid:
-      url += get_color_string(type.color);
+      url += type.get_color_hex_string();
       return url;
     default:
       UNREACHABLE();
@@ -180,6 +272,196 @@ BackgroundId BackgroundManager::search_background(const string &name, Promise<Un
   return BackgroundId();
 }
 
+Result<FileId> BackgroundManager::prepare_input_file(const tl_object_ptr<td_api::InputFile> &input_file) {
+  auto r_file_id = td_->file_manager_->get_input_file_id(FileType::Background, input_file, {}, false, false);
+  if (r_file_id.is_error()) {
+    return Status::Error(400, r_file_id.error().message());
+  }
+  auto file_id = r_file_id.move_as_ok();
+
+  FileView file_view = td_->file_manager_->get_file_view(file_id);
+  if (file_view.is_encrypted()) {
+    return Status::Error(400, "Can't use encrypted file");
+  }
+  if (!file_view.has_local_location() && !file_view.has_generate_location()) {
+    return Status::Error(400, "Need local or generate location to upload background");
+  }
+  return std::move(file_id);
+}
+
+BackgroundId BackgroundManager::set_background(const td_api::InputBackground *input_background,
+                                               const td_api::BackgroundType *background_type, Promise<Unit> &&promise) {
+  auto r_type = get_background_type(background_type);
+  if (r_type.is_error()) {
+    promise.set_error(r_type.move_as_error());
+    return BackgroundId();
+  }
+
+  auto type = r_type.move_as_ok();
+  if (type.type == BackgroundType::Type::Solid) {
+    auto color = type.color;
+    CHECK(0 <= color && color < 0x1000000);
+    BackgroundId id(static_cast<int64>(color));
+    if (set_background_id_ != id) {
+      auto *background = add_background(id);
+      background->id = id;
+      background->access_hash = 0;
+      background->is_creator = true;
+      background->is_default = false;
+      background->is_dark = (color & 0x808080) == 0;
+      background->type = type;
+      background->name = type.get_color_hex_string();
+      background->file_id = FileId();
+      background->file_source_id = FileSourceId();
+
+      set_background_id(id, type);
+    }
+
+    promise.set_value(Unit());
+    return id;
+  }
+
+  if (input_background == nullptr) {
+    promise.set_error(Status::Error(400, "Input background must be non-empty"));
+    return BackgroundId();
+  }
+
+  switch (input_background->get_id()) {
+    case td_api::inputBackgroundLocal::ID: {
+      auto background_local = static_cast<const td_api::inputBackgroundLocal *>(input_background);
+      auto r_file_id = prepare_input_file(background_local->background_);
+      if (r_file_id.is_error()) {
+        promise.set_error(r_file_id.move_as_error());
+        return BackgroundId();
+      }
+      auto file_id = r_file_id.move_as_ok();
+      LOG(INFO) << "Receive file " << file_id << " for input background";
+
+      auto it = file_id_to_background_id_.find(file_id);
+      if (it != file_id_to_background_id_.end()) {
+        return set_background(it->second, type, std::move(promise));
+      }
+
+      upload_background_file(file_id, type, std::move(promise));
+      break;
+    }
+    case td_api::inputBackgroundRemote::ID: {
+      auto background_remote = static_cast<const td_api::inputBackgroundRemote *>(input_background);
+      return set_background(BackgroundId(background_remote->background_id_), type, std::move(promise));
+    }
+    default:
+      UNREACHABLE();
+  }
+  return BackgroundId();
+}
+
+BackgroundId BackgroundManager::set_background(BackgroundId background_id, const BackgroundType &type,
+                                               Promise<Unit> &&promise) {
+  auto *background = get_background(background_id);
+  if (background == nullptr) {
+    promise.set_error(Status::Error(400, "Background to set not found"));
+    return BackgroundId();
+  }
+  if (background->type.type != type.type) {
+    promise.set_error(Status::Error(400, "Background type mismatch"));
+    return BackgroundId();
+  }
+  if (set_background_id_ == background_id) {
+    promise.set_value(Unit());
+    return background_id;
+  }
+
+  LOG(INFO) << "Install " << background_id << " with " << type;
+  td_->create_handler<InstallBackgroundQuery>(std::move(promise))->send(background_id, background->access_hash, type);
+  return BackgroundId();
+}
+
+void BackgroundManager::set_background_id(BackgroundId background_id, const BackgroundType &type) {
+  if (background_id == set_background_id_ && set_background_type_ == type) {
+    return;
+  }
+
+  set_background_id_ = background_id;
+  set_background_type_ = type;
+}
+
+void BackgroundManager::upload_background_file(FileId file_id, const BackgroundType &type, Promise<Unit> &&promise) {
+  auto upload_file_id = td_->file_manager_->dup_file_id(file_id);
+
+  being_uploaded_files_[upload_file_id] = {type, std::move(promise)};
+  LOG(INFO) << "Ask to upload background file " << upload_file_id;
+  td_->file_manager_->upload(upload_file_id, upload_background_file_callback_, 1, 0);
+}
+
+void BackgroundManager::on_upload_background_file(FileId file_id, tl_object_ptr<telegram_api::InputFile> input_file) {
+  LOG(INFO) << "Background file " << file_id << " has been uploaded";
+
+  auto it = being_uploaded_files_.find(file_id);
+  CHECK(it != being_uploaded_files_.end());
+
+  auto type = it->second.type;
+  auto promise = std::move(it->second.promise);
+
+  being_uploaded_files_.erase(it);
+
+  do_upload_background_file(file_id, type, std::move(input_file), std::move(promise));
+}
+
+void BackgroundManager::on_upload_background_file_error(FileId file_id, Status status) {
+  if (G()->close_flag()) {
+    // do not fail upload if closing
+    return;
+  }
+
+  LOG(WARNING) << "Background file " << file_id << " has upload error " << status;
+  CHECK(status.is_error());
+
+  auto it = being_uploaded_files_.find(file_id);
+  CHECK(it != being_uploaded_files_.end());
+
+  auto promise = std::move(it->second.promise);
+
+  being_uploaded_files_.erase(it);
+
+  promise.set_error(Status::Error(status.code() > 0 ? status.code() : 500,
+                                  status.message()));  // TODO CHECK that status has always a code
+}
+
+void BackgroundManager::do_upload_background_file(FileId file_id, const BackgroundType &type,
+                                                  tl_object_ptr<telegram_api::InputFile> &&input_file,
+                                                  Promise<Unit> &&promise) {
+  if (input_file == nullptr) {
+    FileView file_view = td_->file_manager_->get_file_view(file_id);
+    file_id = file_view.file_id();
+    auto it = file_id_to_background_id_.find(file_id);
+    if (it != file_id_to_background_id_.end()) {
+      set_background(it->second, type, std::move(promise));
+      return;
+    }
+    return promise.set_error(Status::Error(500, "Failed to reupload background"));
+  }
+
+  td_->create_handler<UploadBackgroundQuery>(std::move(promise))->send(file_id, std::move(input_file), type);
+}
+
+void BackgroundManager::on_uploaded_background_file(FileId file_id, const BackgroundType &type,
+                                                    telegram_api::object_ptr<telegram_api::wallPaper> wallpaper,
+                                                    Promise<Unit> &&promise) {
+  CHECK(wallpaper != nullptr);
+
+  BackgroundId background_id = on_get_background(BackgroundId(), std::move(wallpaper));
+  if (!background_id.is_valid()) {
+    td_->file_manager_->cancel_upload(file_id);
+    return promise.set_error(Status::Error(500, "Receive wrong uploaded background"));
+  }
+
+  auto background = get_background(background_id);
+  CHECK(background != nullptr);
+  LOG_STATUS(td_->file_manager_->merge(background->file_id, file_id));
+  set_background_id(background_id, type);
+  promise.set_value(Unit());
+}
+
 BackgroundManager::Background *BackgroundManager::add_background(BackgroundId background_id) {
   CHECK(background_id.is_valid());
   auto *result = &backgrounds_[background_id];
@@ -223,6 +505,10 @@ BackgroundId BackgroundManager::on_get_background(BackgroundId expected_backgrou
   if (expected_background_id.is_valid() && id != expected_background_id) {
     LOG(ERROR) << "Expected " << expected_background_id << ", but receive " << to_string(wallpaper);
   }
+  if (wallpaper->slug_.size() <= 6) {
+    LOG(ERROR) << "Receive " << to_string(wallpaper);
+    return BackgroundId();
+  }
 
   int32 document_id = wallpaper->document_->get_id();
   if (document_id == telegram_api::documentEmpty::ID) {
@@ -260,8 +546,10 @@ BackgroundId BackgroundManager::on_get_background(BackgroundId expected_backgrou
     name_to_background_id_.emplace(background->name, id);
   }
   if (background->file_id != document.file_id) {
-    LOG_IF(ERROR, background->file_id.is_valid())
-        << "Background file has changed from " << background->file_id << " to " << document.file_id;
+    if (background->file_id.is_valid()) {
+      LOG(ERROR) << "Background file has changed from " << background->file_id << " to " << document.file_id;
+      file_id_to_background_id_.erase(background->file_id);
+    }
     if (!background->file_source_id.is_valid()) {
       background->file_source_id =
           td_->file_reference_manager_->create_background_file_source(id, background->access_hash);
@@ -270,6 +558,7 @@ BackgroundId BackgroundManager::on_get_background(BackgroundId expected_backgrou
       td_->file_manager_->add_file_source(file_id, background->file_source_id);
     }
     background->file_id = document.file_id;
+    file_id_to_background_id_.emplace(background->file_id, id);
   }
   return id;
 }
@@ -280,7 +569,7 @@ void BackgroundManager::on_get_backgrounds(Result<telegram_api::object_ptr<teleg
   reset_to_empty(pending_get_backgrounds_queries_);
 
   if (result.is_error()) {
-    // do not clear installed_backgrounds_
+    // do not clear installed_background_ids_
 
     auto error = result.move_as_error();
     for (auto &promise : promises) {
@@ -298,12 +587,12 @@ void BackgroundManager::on_get_backgrounds(Result<telegram_api::object_ptr<teleg
     return;
   }
 
-  installed_backgrounds_.clear();
+  installed_background_ids_.clear();
   auto wallpapers = telegram_api::move_object_as<telegram_api::account_wallPapers>(wallpapers_ptr);
   for (auto &wallpaper : wallpapers->wallpapers_) {
     auto background_id = on_get_background(BackgroundId(), std::move(wallpaper));
     if (background_id.is_valid()) {
-      installed_backgrounds_.push_back(background_id);
+      installed_background_ids_.push_back(background_id);
     }
   }
 
@@ -317,14 +606,28 @@ td_api::object_ptr<td_api::background> BackgroundManager::get_background_object(
   if (background == nullptr) {
     return nullptr;
   }
+  auto type = &background->type;
+  if (background_id == set_background_id_) {
+    type = &set_background_type_;
+  }
   return td_api::make_object<td_api::background>(
       background->id.get(), background->is_default, background->is_dark, background->name,
-      td_->documents_manager_->get_document_object(background->file_id), get_background_type_object(background->type));
+      td_->documents_manager_->get_document_object(background->file_id), get_background_type_object(*type));
 }
 
 td_api::object_ptr<td_api::backgrounds> BackgroundManager::get_backgrounds_object() const {
-  return td_api::make_object<td_api::backgrounds>(transform(
-      installed_backgrounds_, [this](BackgroundId background_id) { return get_background_object(background_id); }));
+  auto background_ids = installed_background_ids_;
+  if (set_background_id_.is_valid()) {
+    auto it = std::find(background_ids.begin(), background_ids.end(), set_background_id_);
+    if (it != background_ids.end()) {
+      // move set background to the first place
+      std::rotate(background_ids.begin(), it, it + 1);
+    } else {
+      background_ids.insert(background_ids.begin(), set_background_id_);
+    }
+  }
+  return td_api::make_object<td_api::backgrounds>(
+      transform(background_ids, [this](BackgroundId background_id) { return get_background_object(background_id); }));
 }
 
 FileSourceId BackgroundManager::get_background_file_source_id(BackgroundId background_id, int64 access_hash) {
diff --git a/td/telegram/BackgroundManager.h b/td/telegram/BackgroundManager.h
index efb2b847..ca4ed2b9 100644
--- a/td/telegram/BackgroundManager.h
+++ b/td/telegram/BackgroundManager.h
@@ -20,6 +20,7 @@
 #include "td/utils/common.h"
 #include "td/utils/Status.h"
 
+#include <memory>
 #include <unordered_map>
 
 namespace td {
@@ -39,6 +40,11 @@ class BackgroundManager : public Actor {
 
   BackgroundId search_background(const string &name, Promise<Unit> &&promise);
 
+  BackgroundId set_background(const td_api::InputBackground *input_background,
+                              const td_api::BackgroundType *background_type, Promise<Unit> &&promise);
+
+  void set_background_id(BackgroundId background_id, const BackgroundType &type);
+
   td_api::object_ptr<td_api::background> get_background_object(BackgroundId background_id) const;
 
   td_api::object_ptr<td_api::backgrounds> get_backgrounds_object() const;
@@ -48,6 +54,10 @@ class BackgroundManager : public Actor {
 
   FileSourceId get_background_file_source_id(BackgroundId background_id, int64 access_hash);
 
+  void on_uploaded_background_file(FileId file_id, const BackgroundType &type,
+                                   telegram_api::object_ptr<telegram_api::wallPaper> wallpaper,
+                                   Promise<Unit> &&promise);
+
  private:
   struct Background {
     BackgroundId id;
@@ -61,6 +71,8 @@ class BackgroundManager : public Actor {
     FileSourceId file_source_id;
   };
 
+  class UploadBackgroundFileCallback;
+
   void tear_down() override;
 
   void reload_background_from_server(BackgroundId background_id,
@@ -75,6 +87,19 @@ class BackgroundManager : public Actor {
 
   void on_get_backgrounds(Result<telegram_api::object_ptr<telegram_api::account_WallPapers>> result);
 
+  Result<FileId> prepare_input_file(const tl_object_ptr<td_api::InputFile> &input_file);
+
+  BackgroundId set_background(BackgroundId background_id, const BackgroundType &type, Promise<Unit> &&promise);
+
+  void upload_background_file(FileId file_id, const BackgroundType &type, Promise<Unit> &&promise);
+
+  void on_upload_background_file(FileId file_id, tl_object_ptr<telegram_api::InputFile> input_file);
+
+  void on_upload_background_file_error(FileId file_id, Status status);
+
+  void do_upload_background_file(FileId file_id, const BackgroundType &type,
+                                 tl_object_ptr<telegram_api::InputFile> &&input_file, Promise<Unit> &&promise);
+
   std::unordered_map<BackgroundId, Background, BackgroundIdHash> backgrounds_;
 
   std::unordered_map<BackgroundId, std::pair<int64, FileSourceId>, BackgroundIdHash>
@@ -82,10 +107,23 @@ class BackgroundManager : public Actor {
 
   std::unordered_map<string, BackgroundId> name_to_background_id_;
 
-  vector<BackgroundId> installed_backgrounds_;
+  std::unordered_map<FileId, BackgroundId, FileIdHash> file_id_to_background_id_;
+
+  BackgroundId set_background_id_;
+  BackgroundType set_background_type_;
+
+  vector<BackgroundId> installed_background_ids_;
 
   vector<Promise<Unit>> pending_get_backgrounds_queries_;
 
+  std::shared_ptr<UploadBackgroundFileCallback> upload_background_file_callback_;
+
+  struct UploadedFileInfo {
+    BackgroundType type;
+    Promise<Unit> promise;
+  };
+  std::unordered_map<FileId, UploadedFileInfo, FileIdHash> being_uploaded_files_;
+
   Td *td_;
   ActorShared<> parent_;
 };
diff --git a/td/telegram/BackgroundType.cpp b/td/telegram/BackgroundType.cpp
index dcd79fa9..2c287856 100644
--- a/td/telegram/BackgroundType.cpp
+++ b/td/telegram/BackgroundType.cpp
@@ -8,6 +8,35 @@
 
 namespace td {
 
+string BackgroundType::get_color_hex_string() const {
+  string result;
+  for (int i = 20; i >= 0; i -= 4) {
+    result += "0123456789abcdef"[(color >> i) & 0xf];
+  }
+  return result;
+}
+
+bool operator==(const BackgroundType &lhs, const BackgroundType &rhs) {
+  return lhs.type == rhs.type && lhs.is_blurred == rhs.is_blurred && lhs.is_moving == rhs.is_moving &&
+         lhs.color == rhs.color && lhs.intensity == rhs.intensity;
+}
+
+StringBuilder &operator<<(StringBuilder &string_builder, const BackgroundType &type) {
+  switch (type.type) {
+    case BackgroundType::Type::Wallpaper:
+      return string_builder << "type Wallpaper[" << (type.is_blurred ? "blurred" : "") << ' '
+                            << (type.is_moving ? "moving" : "") << ']';
+    case BackgroundType::Type::Pattern:
+      return string_builder << "type Pattern[" << (type.is_moving ? "moving" : "") << ' ' << type.get_color_hex_string()
+                            << ' ' << type.intensity << ']';
+    case BackgroundType::Type::Solid:
+      return string_builder << "type Solid[" << type.get_color_hex_string() << ']';
+    default:
+      UNREACHABLE();
+      return string_builder;
+  }
+}
+
 Result<BackgroundType> get_background_type(const td_api::BackgroundType *type) {
   if (type == nullptr) {
     return Status::Error(400, "Type must not be empty");
@@ -88,4 +117,30 @@ td_api::object_ptr<td_api::BackgroundType> get_background_type_object(const Back
   }
 }
 
+telegram_api::object_ptr<telegram_api::wallPaperSettings> get_input_wallpaper_settings(const BackgroundType &type) {
+  int32 flags = 0;
+  if (type.is_blurred) {
+    flags |= telegram_api::wallPaperSettings::BLUR_MASK;
+  }
+  if (type.is_moving) {
+    flags |= telegram_api::wallPaperSettings::MOTION_MASK;
+  }
+  if (type.color != 0) {
+    flags |= telegram_api::wallPaperSettings::BACKGROUND_COLOR_MASK;
+  }
+  if (type.intensity) {
+    flags |= telegram_api::wallPaperSettings::INTENSITY_MASK;
+  }
+  switch (type.type) {
+    case BackgroundType::Type::Wallpaper:
+    case BackgroundType::Type::Pattern:
+      return telegram_api::make_object<telegram_api::wallPaperSettings>(flags, false /*ignored*/, false /*ignored*/,
+                                                                        type.color, type.intensity);
+    case BackgroundType::Type::Solid:
+    default:
+      UNREACHABLE();
+      return nullptr;
+  }
+}
+
 }  // namespace td
diff --git a/td/telegram/BackgroundType.h b/td/telegram/BackgroundType.h
index c28e7ad0..a2ed240c 100644
--- a/td/telegram/BackgroundType.h
+++ b/td/telegram/BackgroundType.h
@@ -11,6 +11,7 @@
 
 #include "td/utils/common.h"
 #include "td/utils/Status.h"
+#include "td/utils/StringBuilder.h"
 
 namespace td {
 
@@ -31,12 +32,20 @@ struct BackgroundType {
   }
   explicit BackgroundType(int32 color) : type(Type::Solid), color(color) {
   }
+
+  string get_color_hex_string() const;
 };
 
+bool operator==(const BackgroundType &lhs, const BackgroundType &rhs);
+
+StringBuilder &operator<<(StringBuilder &string_builder, const BackgroundType &type);
+
 Result<BackgroundType> get_background_type(const td_api::BackgroundType *type);
 
 BackgroundType get_background_type(bool is_pattern, telegram_api::object_ptr<telegram_api::wallPaperSettings> settings);
 
 td_api::object_ptr<td_api::BackgroundType> get_background_type_object(const BackgroundType &type);
 
+telegram_api::object_ptr<telegram_api::wallPaperSettings> get_input_wallpaper_settings(const BackgroundType &type);
+
 }  // namespace td
diff --git a/td/telegram/StickersManager.cpp b/td/telegram/StickersManager.cpp
index 4dcbacb5..e3711763 100644
--- a/td/telegram/StickersManager.cpp
+++ b/td/telegram/StickersManager.cpp
@@ -719,6 +719,7 @@ class UploadStickerFileQuery : public Td::ResultHandler {
     } else if (FileReferenceManager::is_file_reference_error(status)) {
       LOG(ERROR) << "Receive file reference error for UploadStickerFileQuery";
     }
+    td->file_manager_->cancel_upload(file_id_);
     promise_.set_error(std::move(status));
   }
 };
diff --git a/td/telegram/Td.cpp b/td/telegram/Td.cpp
index df6cd0f8..744c74a9 100644
--- a/td/telegram/Td.cpp
+++ b/td/telegram/Td.cpp
@@ -2918,6 +2918,31 @@ class SearchBackgroundRequest : public RequestActor<> {
   }
 };
 
+class SetBackgroundRequest : public RequestActor<> {
+  td_api::object_ptr<td_api::InputBackground> input_background_;
+  td_api::object_ptr<td_api::BackgroundType> background_type_;
+
+  BackgroundId background_id_;
+
+  void do_run(Promise<Unit> &&promise) override {
+    background_id_ =
+        td->background_manager_->set_background(input_background_.get(), background_type_.get(), std::move(promise));
+  }
+
+  void do_send_result() override {
+    send_result(td->background_manager_->get_background_object(background_id_));
+  }
+
+ public:
+  SetBackgroundRequest(ActorShared<Td> td, uint64 request_id,
+                       td_api::object_ptr<td_api::InputBackground> &&input_background,
+                       td_api::object_ptr<td_api::BackgroundType> background_type)
+      : RequestActor(std::move(td), request_id)
+      , input_background_(std::move(input_background))
+      , background_type_(std::move(background_type)) {
+  }
+};
+
 class GetRecentlyVisitedTMeUrlsRequest : public RequestActor<tl_object_ptr<td_api::tMeUrls>> {
   string referrer_;
 
@@ -6980,6 +7005,11 @@ void Td::on_request(uint64 id, td_api::searchBackground &request) {
   CREATE_REQUEST(SearchBackgroundRequest, std::move(request.name_));
 }
 
+void Td::on_request(uint64 id, td_api::setBackground &request) {
+  CHECK_IS_USER();
+  CREATE_REQUEST(SetBackgroundRequest, std::move(request.background_), std::move(request.type_));
+}
+
 void Td::on_request(uint64 id, td_api::getRecentlyVisitedTMeUrls &request) {
   CHECK_IS_USER();
   CLEAN_INPUT_STRING(request.referrer_);
diff --git a/td/telegram/Td.h b/td/telegram/Td.h
index 8baae63a..cbd3f677 100644
--- a/td/telegram/Td.h
+++ b/td/telegram/Td.h
@@ -928,6 +928,8 @@ class Td final : public NetQueryCallback {
 
   void on_request(uint64 id, td_api::searchBackground &request);
 
+  void on_request(uint64 id, td_api::setBackground &request);
+
   void on_request(uint64 id, td_api::getRecentlyVisitedTMeUrls &request);
 
   void on_request(uint64 id, td_api::setBotUpdatesStatus &request);
diff --git a/td/telegram/cli.cpp b/td/telegram/cli.cpp
index 099ac438..5fef1703 100644
--- a/td/telegram/cli.cpp
+++ b/td/telegram/cli.cpp
@@ -1982,6 +1982,25 @@ class CliClient final : public Actor {
       send_get_background_url(td_api::make_object<td_api::backgroundTypeSolid>(0x1000000));
     } else if (op == "sbg") {
       send_request(td_api::make_object<td_api::searchBackground>(args));
+    } else if (op == "sbgw") {
+      send_request(td_api::make_object<td_api::setBackground>(
+          td_api::make_object<td_api::inputBackgroundLocal>(as_input_file(args)),
+          td_api::make_object<td_api::backgroundTypeWallpaper>(true, true)));
+    } else if (op == "sbgp") {
+      send_request(td_api::make_object<td_api::setBackground>(
+          td_api::make_object<td_api::inputBackgroundLocal>(as_input_file(args)),
+          td_api::make_object<td_api::backgroundTypePattern>(true, 0xabcdef, 49)));
+    } else if (op == "sbgs") {
+      send_request(td_api::make_object<td_api::setBackground>(
+          nullptr, td_api::make_object<td_api::backgroundTypeSolid>(to_integer<int32>(args))));
+    } else if (op == "sbgwid") {
+      send_request(td_api::make_object<td_api::setBackground>(
+          td_api::make_object<td_api::inputBackgroundRemote>(to_integer<int64>(args)),
+          td_api::make_object<td_api::backgroundTypeWallpaper>(true, true)));
+    } else if (op == "sbgpid") {
+      send_request(td_api::make_object<td_api::setBackground>(
+          td_api::make_object<td_api::inputBackgroundRemote>(to_integer<int64>(args)),
+          td_api::make_object<td_api::backgroundTypePattern>(true, 0xabcdef, 49)));
     } else if (op == "gccode") {
       send_request(td_api::make_object<td_api::getCountryCode>());
     } else if (op == "git") {
diff --git a/td/telegram/files/FileManager.cpp b/td/telegram/files/FileManager.cpp
index 1265380a..57296ab5 100644
--- a/td/telegram/files/FileManager.cpp
+++ b/td/telegram/files/FileManager.cpp
@@ -2240,7 +2240,7 @@ void FileManager::resume_upload(FileId file_id, std::vector<int> bad_parts, std:
   }
   FileView file_view(node);
   if (file_view.has_active_upload_remote_location() && file_view.get_type() != FileType::Thumbnail &&
-      file_view.get_type() != FileType::EncryptedThumbnail) {
+      file_view.get_type() != FileType::EncryptedThumbnail && file_view.get_type() != FileType::Background) {
     LOG(INFO) << "File " << file_id << " is already uploaded";
     if (callback) {
       callback->on_upload_ok(file_id, nullptr);
@@ -2491,7 +2491,8 @@ void FileManager::run_upload(FileNodePtr node, std::vector<int> bad_parts) {
 
   CHECK(node->upload_id_ == 0);
   if (file_view.has_alive_remote_location() && !file_view.has_active_upload_remote_location() &&
-      file_view.get_type() != FileType::Thumbnail && file_view.get_type() != FileType::EncryptedThumbnail) {
+      file_view.get_type() != FileType::Thumbnail && file_view.get_type() != FileType::EncryptedThumbnail &&
+      file_view.get_type() != FileType::Background) {
     QueryId id = queries_container_.create(Query{file_id, Query::UploadWaitFileReference});
     node->upload_id_ = id;
     if (node->upload_was_update_file_reference_) {