diff --git a/hwe/sammo/API/Auction/BidBuyRiceAuction.php b/hwe/sammo/API/Auction/BidBuyRiceAuction.php
index 8c8b1043..0771d7a1 100644
--- a/hwe/sammo/API/Auction/BidBuyRiceAuction.php
+++ b/hwe/sammo/API/Auction/BidBuyRiceAuction.php
@@ -6,6 +6,7 @@ use sammo\Session;
 use DateTimeInterface;
 use sammo\AuctionBuyRice;
 use sammo\AuctionUniqueItem;
+use sammo\Enums\APIRecoveryType;
 use sammo\Validator;
 use sammo\General;
 
@@ -32,7 +33,7 @@ class BidBuyRiceAuction extends \sammo\BaseAPI
     return static::REQ_GAME_LOGIN;
   }
 
-  public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+  public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
   {
     $auctionID = $this->args['auctionID'];
     $amount = $this->args['amount'];
diff --git a/hwe/sammo/API/Auction/BidSellRiceAuction.php b/hwe/sammo/API/Auction/BidSellRiceAuction.php
index 2448a08f..11549c42 100644
--- a/hwe/sammo/API/Auction/BidSellRiceAuction.php
+++ b/hwe/sammo/API/Auction/BidSellRiceAuction.php
@@ -5,6 +5,7 @@ namespace sammo\API\Auction;
 use sammo\Session;
 use DateTimeInterface;
 use sammo\AuctionSellRice;
+use sammo\Enums\APIRecoveryType;
 use sammo\Validator;
 use sammo\General;
 
@@ -31,7 +32,7 @@ class BidSellRiceAuction extends \sammo\BaseAPI
     return static::REQ_GAME_LOGIN;
   }
 
-  public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+  public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
   {
     $auctionID = $this->args['auctionID'];
     $amount = $this->args['amount'];
diff --git a/hwe/sammo/API/Auction/BidUniqueAuction.php b/hwe/sammo/API/Auction/BidUniqueAuction.php
index 7b2800b2..de637442 100644
--- a/hwe/sammo/API/Auction/BidUniqueAuction.php
+++ b/hwe/sammo/API/Auction/BidUniqueAuction.php
@@ -5,6 +5,7 @@ namespace sammo\API\Auction;
 use sammo\Session;
 use DateTimeInterface;
 use sammo\AuctionUniqueItem;
+use sammo\Enums\APIRecoveryType;
 use sammo\Validator;
 use sammo\GameConst;
 use sammo\General;
@@ -33,7 +34,7 @@ class BidUniqueAuction extends \sammo\BaseAPI
     return static::REQ_GAME_LOGIN;
   }
 
-  public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+  public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
   {
     $auctionID = $this->args['auctionID'];
     $amount = $this->args['amount'];
diff --git a/hwe/sammo/API/Auction/GetActiveResourceAuctionList.php b/hwe/sammo/API/Auction/GetActiveResourceAuctionList.php
index d0d42dc2..f891d00e 100644
--- a/hwe/sammo/API/Auction/GetActiveResourceAuctionList.php
+++ b/hwe/sammo/API/Auction/GetActiveResourceAuctionList.php
@@ -8,6 +8,7 @@ use sammo\AuctionSellRice;
 use sammo\DB;
 use sammo\DTO\AuctionBidItem;
 use sammo\DTO\AuctionInfo;
+use sammo\Enums\APIRecoveryType;
 use sammo\Enums\AuctionType;
 use sammo\Validator;
 use sammo\General;
@@ -29,7 +30,7 @@ class GetActiveResourceAuctionList extends \sammo\BaseAPI
     return static::REQ_GAME_LOGIN;
   }
 
-  public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+  public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
   {
     $db = DB::db();
 
diff --git a/hwe/sammo/API/Auction/GetUniqueItemAuctionDetail.php b/hwe/sammo/API/Auction/GetUniqueItemAuctionDetail.php
index 297791fb..6a7738d7 100644
--- a/hwe/sammo/API/Auction/GetUniqueItemAuctionDetail.php
+++ b/hwe/sammo/API/Auction/GetUniqueItemAuctionDetail.php
@@ -8,6 +8,7 @@ use sammo\AuctionUniqueItem;
 use sammo\DB;
 use sammo\DTO\AuctionBidItem;
 use sammo\DTO\AuctionInfo;
+use sammo\Enums\APIRecoveryType;
 use sammo\Enums\AuctionType;
 use sammo\Enums\InheritanceKey;
 use sammo\InheritancePointManager;
@@ -37,7 +38,7 @@ class GetUniqueItemAuctionDetail extends \sammo\BaseAPI
     return static::REQ_GAME_LOGIN;
   }
 
-  public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+  public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
   {
     $db = DB::db();
 
diff --git a/hwe/sammo/API/Auction/GetUniqueItemAuctionList.php b/hwe/sammo/API/Auction/GetUniqueItemAuctionList.php
index 5937581e..d7ff0704 100644
--- a/hwe/sammo/API/Auction/GetUniqueItemAuctionList.php
+++ b/hwe/sammo/API/Auction/GetUniqueItemAuctionList.php
@@ -8,6 +8,7 @@ use sammo\AuctionUniqueItem;
 use sammo\DB;
 use sammo\DTO\AuctionBidItem;
 use sammo\DTO\AuctionInfo;
+use sammo\Enums\APIRecoveryType;
 use sammo\Enums\AuctionType;
 use sammo\TimeUtil;
 use sammo\Util;
@@ -24,7 +25,7 @@ class GetUniqueItemAuctionList extends \sammo\BaseAPI
     return static::REQ_GAME_LOGIN;
   }
 
-  public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+  public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
   {
     $db = DB::db();
 
diff --git a/hwe/sammo/API/Auction/OpenBuyRiceAuction.php b/hwe/sammo/API/Auction/OpenBuyRiceAuction.php
index b7825f23..d9c71f1a 100644
--- a/hwe/sammo/API/Auction/OpenBuyRiceAuction.php
+++ b/hwe/sammo/API/Auction/OpenBuyRiceAuction.php
@@ -6,6 +6,7 @@ use sammo\Session;
 use DateTimeInterface;
 use sammo\AuctionBuyRice;
 use sammo\DB;
+use sammo\Enums\APIRecoveryType;
 use sammo\Validator;
 use sammo\GameConst;
 use sammo\General;
@@ -52,7 +53,7 @@ class OpenBuyRiceAuction extends \sammo\BaseAPI
     return static::REQ_GAME_LOGIN;
   }
 
-  public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+  public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
   {
     /** @var int */
     $amount = $this->args['amount'];
diff --git a/hwe/sammo/API/Auction/OpenSellRiceAuction.php b/hwe/sammo/API/Auction/OpenSellRiceAuction.php
index faddaf24..9eab113e 100644
--- a/hwe/sammo/API/Auction/OpenSellRiceAuction.php
+++ b/hwe/sammo/API/Auction/OpenSellRiceAuction.php
@@ -6,6 +6,7 @@ use sammo\Session;
 use DateTimeInterface;
 use sammo\AuctionSellRice;
 use sammo\DB;
+use sammo\Enums\APIRecoveryType;
 use sammo\Validator;
 use sammo\GameConst;
 use sammo\General;
@@ -52,7 +53,7 @@ class OpenSellRiceAuction extends \sammo\BaseAPI
     return static::REQ_GAME_LOGIN;
   }
 
-  public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+  public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
   {
     /** @var int */
     $amount = $this->args['amount'];
diff --git a/hwe/sammo/API/Auction/OpenUniqueAuction.php b/hwe/sammo/API/Auction/OpenUniqueAuction.php
index 0071d763..1b4425d3 100644
--- a/hwe/sammo/API/Auction/OpenUniqueAuction.php
+++ b/hwe/sammo/API/Auction/OpenUniqueAuction.php
@@ -6,6 +6,7 @@ use sammo\Session;
 use DateTimeInterface;
 use sammo\AuctionUniqueItem;
 use sammo\DB;
+use sammo\Enums\APIRecoveryType;
 use sammo\Validator;
 use sammo\GameConst;
 use sammo\General;
@@ -49,7 +50,7 @@ class OpenUniqueAuction extends \sammo\BaseAPI
     return static::REQ_GAME_LOGIN;
   }
 
-  public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+  public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
   {
     $itemID = $this->args['itemID'];
     $amount = $this->args['amount'];
diff --git a/hwe/sammo/API/Betting/Bet.php b/hwe/sammo/API/Betting/Bet.php
index 92f35225..2ed78c6b 100644
--- a/hwe/sammo/API/Betting/Bet.php
+++ b/hwe/sammo/API/Betting/Bet.php
@@ -7,6 +7,7 @@ use DateTimeInterface;
 use sammo\Betting;
 use sammo\DB;
 use sammo\DTO\BettingItem;
+use sammo\Enums\APIRecoveryType;
 use sammo\Validator;
 use sammo\GameConst;
 use sammo\KVStorage;
@@ -39,7 +40,7 @@ class Bet extends \sammo\BaseAPI
         return static::REQ_GAME_LOGIN;
     }
 
-    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
     {
         /** @var int */
         $bettingID = $this->args['bettingID'];
diff --git a/hwe/sammo/API/Betting/GetBettingDetail.php b/hwe/sammo/API/Betting/GetBettingDetail.php
index 069032c4..2fbbeda3 100644
--- a/hwe/sammo/API/Betting/GetBettingDetail.php
+++ b/hwe/sammo/API/Betting/GetBettingDetail.php
@@ -6,6 +6,7 @@ use sammo\Session;
 use DateTimeInterface;
 use sammo\DB;
 use sammo\DTO\BettingInfo;
+use sammo\Enums\APIRecoveryType;
 use sammo\KVStorage;
 use sammo\Util;
 use sammo\Validator;
@@ -32,7 +33,7 @@ class GetBettingDetail extends \sammo\BaseAPI
         return static::REQ_GAME_LOGIN | static::REQ_READ_ONLY;
     }
 
-    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
     {
         $db = DB::db();
 
diff --git a/hwe/sammo/API/Betting/GetBettingList.php b/hwe/sammo/API/Betting/GetBettingList.php
index e639d6a0..408261c6 100644
--- a/hwe/sammo/API/Betting/GetBettingList.php
+++ b/hwe/sammo/API/Betting/GetBettingList.php
@@ -6,6 +6,7 @@ use sammo\Session;
 use DateTimeInterface;
 use sammo\DB;
 use sammo\DTO\BettingInfo;
+use sammo\Enums\APIRecoveryType;
 use sammo\KVStorage;
 use sammo\Validator;
 
@@ -29,7 +30,7 @@ class GetBettingList extends \sammo\BaseAPI
         return static::REQ_GAME_LOGIN | static::REQ_READ_ONLY;
     }
 
-    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
     {
         $db = DB::db();
 
diff --git a/hwe/sammo/API/Command/GetReservedCommand.php b/hwe/sammo/API/Command/GetReservedCommand.php
index 5ed77069..9fe8c36b 100644
--- a/hwe/sammo/API/Command/GetReservedCommand.php
+++ b/hwe/sammo/API/Command/GetReservedCommand.php
@@ -5,6 +5,7 @@ namespace sammo\API\Command;
 use sammo\Session;
 use DateTimeInterface;
 use sammo\DB;
+use sammo\Enums\APIRecoveryType;
 use sammo\Json;
 use sammo\KVStorage;
 use sammo\TimeUtil;
@@ -23,7 +24,7 @@ class GetReservedCommand extends \sammo\BaseAPI
         return static::REQ_GAME_LOGIN | static::REQ_READ_ONLY;
     }
 
-    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
     {
         $db = DB::db();
 
diff --git a/hwe/sammo/API/Command/PushCommand.php b/hwe/sammo/API/Command/PushCommand.php
index 5cbbafda..85dc1402 100644
--- a/hwe/sammo/API/Command/PushCommand.php
+++ b/hwe/sammo/API/Command/PushCommand.php
@@ -4,6 +4,7 @@ namespace sammo\API\Command;
 
 use sammo\Session;
 use DateTimeInterface;
+use sammo\Enums\APIRecoveryType;
 use sammo\Validator;
 
 use function sammo\pushGeneralCommand;
@@ -31,7 +32,7 @@ class PushCommand extends \sammo\BaseAPI
         return static::REQ_GAME_LOGIN | static::REQ_READ_ONLY;
     }
 
-    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
     {
         $amount = $this->args['amount'];
         if($amount == 0){
diff --git a/hwe/sammo/API/Command/RepeatCommand.php b/hwe/sammo/API/Command/RepeatCommand.php
index 8da1a500..951d7441 100644
--- a/hwe/sammo/API/Command/RepeatCommand.php
+++ b/hwe/sammo/API/Command/RepeatCommand.php
@@ -4,6 +4,7 @@ namespace sammo\API\Command;
 
 use sammo\Session;
 use DateTimeInterface;
+use sammo\Enums\APIRecoveryType;
 use sammo\Validator;
 
 use function sammo\repeatGeneralCommand;
@@ -31,7 +32,7 @@ class RepeatCommand extends \sammo\BaseAPI
         return static::REQ_GAME_LOGIN | static::REQ_READ_ONLY;
     }
 
-    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
     {
 
         $amount = $this->args['amount'];
diff --git a/hwe/sammo/API/Command/ReserveBulkCommand.php b/hwe/sammo/API/Command/ReserveBulkCommand.php
index d612aa77..0bb09615 100644
--- a/hwe/sammo/API/Command/ReserveBulkCommand.php
+++ b/hwe/sammo/API/Command/ReserveBulkCommand.php
@@ -4,6 +4,7 @@ namespace sammo\API\Command;
 
 use sammo\Session;
 use DateTimeInterface;
+use sammo\Enums\APIRecoveryType;
 use sammo\GameConst;
 use sammo\Util;
 use sammo\Validator;
@@ -36,7 +37,7 @@ class ReserveBulkCommand extends \sammo\BaseAPI
         return static::REQ_GAME_LOGIN | static::REQ_READ_ONLY;
     }
 
-    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
     {
         $briefList = [];
         foreach ($this->args as $idx => $turn) {
diff --git a/hwe/sammo/API/Command/ReserveCommand.php b/hwe/sammo/API/Command/ReserveCommand.php
index 802c5dbd..90ead7fa 100644
--- a/hwe/sammo/API/Command/ReserveCommand.php
+++ b/hwe/sammo/API/Command/ReserveCommand.php
@@ -4,6 +4,7 @@ namespace sammo\API\Command;
 
 use sammo\Session;
 use DateTimeInterface;
+use sammo\Enums\APIRecoveryType;
 use sammo\GameConst;
 use sammo\Util;
 use sammo\Validator;
@@ -33,7 +34,7 @@ class ReserveCommand extends \sammo\BaseAPI
         return static::REQ_GAME_LOGIN | static::REQ_READ_ONLY;
     }
 
-    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
     {
         $action = $this->args['action'];
         $turnList = $this->args['turnList'];
diff --git a/hwe/sammo/API/General/BuildNationCandidate.php b/hwe/sammo/API/General/BuildNationCandidate.php
index 5a60c5f8..75816a7a 100644
--- a/hwe/sammo/API/General/BuildNationCandidate.php
+++ b/hwe/sammo/API/General/BuildNationCandidate.php
@@ -4,6 +4,7 @@ namespace sammo\API\General;
 
 use sammo\Command\General\che_거병;
 use sammo\DB;
+use sammo\Enums\APIRecoveryType;
 use sammo\Validator;
 
 use sammo\Session;
@@ -30,7 +31,7 @@ class BuildNationCandidate extends \sammo\BaseAPI
     return static::REQ_GAME_LOGIN;
   }
 
-  public function launch(Session $session, ?\DateTimeInterface $modifiedSince, ?string $reqEtag)
+  public function launch(Session $session, ?\DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
   {
     $userID = $session->userID;
 
diff --git a/hwe/sammo/API/General/DieOnPrestart.php b/hwe/sammo/API/General/DieOnPrestart.php
index 3e7efbce..c9650bb2 100644
--- a/hwe/sammo/API/General/DieOnPrestart.php
+++ b/hwe/sammo/API/General/DieOnPrestart.php
@@ -4,6 +4,7 @@ namespace sammo\API\General;
 
 use sammo\DB;
 use sammo\DummyGeneral;
+use sammo\Enums\APIRecoveryType;
 use sammo\GameConst;
 use sammo\Session;
 use sammo\General;
@@ -26,7 +27,7 @@ class DieOnPrestart extends \sammo\BaseAPI
     return static::REQ_GAME_LOGIN;
   }
 
-  public function launch(Session $session, ?\DateTimeInterface $modifiedSince, ?string $reqEtag)
+  public function launch(Session $session, ?\DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
   {
     //로그인 검사
     $userID = $session->userID;
diff --git a/hwe/sammo/API/General/DropItem.php b/hwe/sammo/API/General/DropItem.php
index 21c2728c..1ab36005 100644
--- a/hwe/sammo/API/General/DropItem.php
+++ b/hwe/sammo/API/General/DropItem.php
@@ -4,6 +4,7 @@ namespace sammo\API\General;
 
 use Ds\Set;
 use sammo\DB;
+use sammo\Enums\APIRecoveryType;
 use sammo\Validator;
 
 use sammo\Session;
@@ -33,7 +34,7 @@ class DropItem extends \sammo\BaseAPI
     return static::REQ_GAME_LOGIN;
   }
 
-  public function launch(Session $session, ?\DateTimeInterface $modifiedSince, ?string $reqEtag)
+  public function launch(Session $session, ?\DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
   {
     $generalID = $session->generalID;
     $me = General::createGeneralObjFromDB($generalID);
diff --git a/hwe/sammo/API/General/GetCommandTable.php b/hwe/sammo/API/General/GetCommandTable.php
index 4751cdd0..7e0a4ee2 100644
--- a/hwe/sammo/API/General/GetCommandTable.php
+++ b/hwe/sammo/API/General/GetCommandTable.php
@@ -1,6 +1,7 @@
 <?php
 namespace sammo\API\General;
 
+use sammo\Enums\APIRecoveryType;
 use sammo\General;
 use sammo\Session;
 
@@ -17,7 +18,8 @@ class GetCommandTable extends \sammo\BaseAPI{
         return static::REQ_GAME_LOGIN | static::REQ_READ_ONLY;
     }
 
-    public function launch(Session $session, ?\DateTimeInterface $modifiedSince, ?string $reqEtag){
+    public function launch(Session $session, ?\DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
+    {
         $generalID = $session->generalID;
         $me = General::createGeneralObjFromDB($generalID);
         $commandTable = getCommandTable($me);
diff --git a/hwe/sammo/API/General/GetFrontInfo.php b/hwe/sammo/API/General/GetFrontInfo.php
index 166ccd2e..01fc6845 100644
--- a/hwe/sammo/API/General/GetFrontInfo.php
+++ b/hwe/sammo/API/General/GetFrontInfo.php
@@ -527,7 +527,7 @@ class GetFrontInfo extends \sammo\BaseAPI
     return $result;
   }
 
-  public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+  public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
   {
     $generalID = $session->generalID;
     //NOTE: 이 경우 staticNation 정보를 조회한다.
diff --git a/hwe/sammo/API/General/Join.php b/hwe/sammo/API/General/Join.php
index 2b444aec..15a95ea4 100644
--- a/hwe/sammo/API/General/Join.php
+++ b/hwe/sammo/API/General/Join.php
@@ -7,6 +7,7 @@ use sammo\ActionLogger;
 use sammo\Auction;
 use sammo\CityConst;
 use sammo\DB;
+use sammo\Enums\APIRecoveryType;
 use sammo\Enums\RankColumn;
 use sammo\GameConst;
 use sammo\GameUnitConst;
@@ -120,7 +121,7 @@ class Join extends \sammo\BaseAPI
         return $targetBonusPointCnt;
     }
 
-    public function launch(Session $session, ?\DateTimeInterface $modifiedSince, ?string $reqEtag)
+    public function launch(Session $session, ?\DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
     {
         $userID = $session->userID;
 
diff --git a/hwe/sammo/API/Global/ExecuteEngine.php b/hwe/sammo/API/Global/ExecuteEngine.php
index 54077faa..192d1cd3 100644
--- a/hwe/sammo/API/Global/ExecuteEngine.php
+++ b/hwe/sammo/API/Global/ExecuteEngine.php
@@ -5,6 +5,7 @@ namespace sammo\API\Global;
 use sammo\Session;
 use sammo\DB;
 use DateTimeInterface;
+use sammo\Enums\APIRecoveryType;
 use sammo\TurnExecutionHelper;
 use sammo\UniqueConst;
 
@@ -20,7 +21,7 @@ class ExecuteEngine extends \sammo\BaseAPI
         return static::NO_SESSION;
     }
 
-    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
     {
       $reqServerID = $this->args['serverID'] ?? null;
       if($reqServerID && $reqServerID !== UniqueConst::$serverID){
diff --git a/hwe/sammo/API/Global/GeneralList.php b/hwe/sammo/API/Global/GeneralList.php
index 26eb9f5c..dd54b7df 100644
--- a/hwe/sammo/API/Global/GeneralList.php
+++ b/hwe/sammo/API/Global/GeneralList.php
@@ -3,6 +3,7 @@
 namespace sammo\API\Global;
 
 use sammo\DB;
+use sammo\Enums\APIRecoveryType;
 use sammo\Json;
 use sammo\KVStorage;
 use sammo\RootDB;
@@ -33,7 +34,7 @@ class GeneralList extends \sammo\BaseAPI
         return static::REQ_LOGIN;
     }
 
-    public function launch(Session $session, ?\DateTimeInterface $modifiedSince, ?string $reqEtag)
+    public function launch(Session $session, ?\DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
     {
         $db = DB::db();
         $gameStor = KVStorage::getStorage($db, 'game_env');
diff --git a/hwe/sammo/API/Global/GetCachedMap.php b/hwe/sammo/API/Global/GetCachedMap.php
index a41aa452..fff67442 100644
--- a/hwe/sammo/API/Global/GetCachedMap.php
+++ b/hwe/sammo/API/Global/GetCachedMap.php
@@ -6,6 +6,7 @@ use sammo\Session;
 use DateTimeInterface;
 use Nette\Caching\Cache;
 use sammo\APICacheResult;
+use sammo\Enums\APIRecoveryType;
 use sammo\GameConst;
 use sammo\MapRequest;
 use sammo\TimeUtil;
@@ -44,7 +45,7 @@ class GetCachedMap extends \sammo\BaseAPI
     return static::NO_SESSION;
   }
 
-  public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+  public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
   {
     if (!class_exists('\\sammo\\UniqueConst')) {
       return '서버 초기화되지 않음';
diff --git a/hwe/sammo/API/Global/GetConst.php b/hwe/sammo/API/Global/GetConst.php
index 00c98057..c7eec783 100644
--- a/hwe/sammo/API/Global/GetConst.php
+++ b/hwe/sammo/API/Global/GetConst.php
@@ -9,6 +9,7 @@ use Nette\Caching\Cache;
 use RuntimeException;
 use sammo\APICacheResult;
 use sammo\CityConst;
+use sammo\Enums\APIRecoveryType;
 use sammo\GameConst;
 use sammo\GameUnitConst;
 use sammo\Json;
@@ -279,7 +280,7 @@ class GetConst extends \sammo\BaseAPI
         ];
     }
 
-    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
     {
         $cacheDir = $this->rootPath . '/data/file_cache';
 
diff --git a/hwe/sammo/API/Global/GetCurrentHistory.php b/hwe/sammo/API/Global/GetCurrentHistory.php
index 02377d48..dbc4fea5 100644
--- a/hwe/sammo/API/Global/GetCurrentHistory.php
+++ b/hwe/sammo/API/Global/GetCurrentHistory.php
@@ -4,6 +4,7 @@ namespace sammo\API\Global;
 
 use sammo\Session;
 use DateTimeInterface;
+use sammo\Enums\APIRecoveryType;
 
 use function sammo\getCurrentHistory;
 
@@ -19,7 +20,7 @@ class GetCurrentHistory extends \sammo\BaseAPI
     return static::REQ_GAME_LOGIN | static::REQ_READ_ONLY;
   }
 
-  public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+  public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
   {
     $history = getCurrentHistory();
 
diff --git a/hwe/sammo/API/Global/GetDiplomacy.php b/hwe/sammo/API/Global/GetDiplomacy.php
index 4da4d430..f9ea8853 100644
--- a/hwe/sammo/API/Global/GetDiplomacy.php
+++ b/hwe/sammo/API/Global/GetDiplomacy.php
@@ -3,6 +3,7 @@
 namespace sammo\API\Global;
 
 use sammo\DB;
+use sammo\Enums\APIRecoveryType;
 use sammo\Json;
 use sammo\KVStorage;
 use sammo\Session;
@@ -22,7 +23,7 @@ class GetDiplomacy extends \sammo\BaseAPI
     return static::REQ_GAME_LOGIN | static::REQ_READ_ONLY;
   }
 
-  public function launch(Session $session, ?\DateTimeInterface $modifiedSince, ?string $reqEtag)
+  public function launch(Session $session, ?\DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
   {
 
     $userID = $session->userID;
diff --git a/hwe/sammo/API/Global/GetGlobalMenu.php b/hwe/sammo/API/Global/GetGlobalMenu.php
index bb2507b9..2a0f540c 100644
--- a/hwe/sammo/API/Global/GetGlobalMenu.php
+++ b/hwe/sammo/API/Global/GetGlobalMenu.php
@@ -5,6 +5,7 @@ namespace sammo\API\Global;
 use LDTO\DTO;
 use sammo\APICacheResult;
 use sammo\BaseAPI;
+use sammo\Enums\APIRecoveryType;
 use sammo\GlobalMenu;
 use sammo\Session;
 
@@ -19,7 +20,7 @@ class GetGlobalMenu extends BaseAPI
     return null;
   }
 
-  function launch(Session $session, ?\DateTimeInterface $modifiedSince, ?string $reqEtag)
+  function launch(Session $session, ?\DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
   {
     if ($reqEtag !== null) {
       $version = GlobalMenu::version;
diff --git a/hwe/sammo/API/Global/GetHistory.php b/hwe/sammo/API/Global/GetHistory.php
index afd068f4..068d883b 100644
--- a/hwe/sammo/API/Global/GetHistory.php
+++ b/hwe/sammo/API/Global/GetHistory.php
@@ -6,6 +6,7 @@ use sammo\Session;
 use DateTimeInterface;
 use sammo\APICacheResult;
 use sammo\DB;
+use sammo\Enums\APIRecoveryType;
 use sammo\Json;
 use sammo\UniqueConst;
 use sammo\Util;
@@ -127,7 +128,7 @@ class GetHistory extends \sammo\BaseAPI
     return $cachedHash;
   }
 
-  public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+  public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
   {
     $checkCache = $this->checkCached($reqEtag);
     if ($checkCache) {
diff --git a/hwe/sammo/API/Global/GetMap.php b/hwe/sammo/API/Global/GetMap.php
index 4cc3a6ca..534200c1 100644
--- a/hwe/sammo/API/Global/GetMap.php
+++ b/hwe/sammo/API/Global/GetMap.php
@@ -4,6 +4,7 @@ namespace sammo\API\Global;
 
 use sammo\Session;
 use DateTimeInterface;
+use sammo\Enums\APIRecoveryType;
 use sammo\MapRequest;
 use sammo\Validator;
 
@@ -27,7 +28,7 @@ class GetMap extends \sammo\BaseAPI
     return static::REQ_LOGIN | static::REQ_READ_ONLY;
   }
 
-  public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+  public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
   {
     return getWorldMap(new MapRequest([
       'neutralView' => !!($this->args['neutralView'] ?? false),
diff --git a/hwe/sammo/API/Global/GetNationList.php b/hwe/sammo/API/Global/GetNationList.php
index f3bd80aa..77dfb690 100644
--- a/hwe/sammo/API/Global/GetNationList.php
+++ b/hwe/sammo/API/Global/GetNationList.php
@@ -5,6 +5,7 @@ namespace sammo\API\Global;
 use sammo\Session;
 use DateTimeInterface;
 use sammo\DB;
+use sammo\Enums\APIRecoveryType;
 
 use function sammo\getAllNationStaticInfo;
 use function sammo\getNationStaticInfo;
@@ -21,7 +22,7 @@ class GetNationList extends \sammo\BaseAPI
         return static::REQ_LOGIN | static::REQ_READ_ONLY;
     }
 
-    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
     {
         $db = DB::db();
 
diff --git a/hwe/sammo/API/Global/GetRecentRecord.php b/hwe/sammo/API/Global/GetRecentRecord.php
index fdc8d865..3f1537e6 100644
--- a/hwe/sammo/API/Global/GetRecentRecord.php
+++ b/hwe/sammo/API/Global/GetRecentRecord.php
@@ -5,6 +5,7 @@ namespace sammo\API\Global;
 use sammo\Session;
 use DateTimeInterface;
 use sammo\DB;
+use sammo\Enums\APIRecoveryType;
 use sammo\KVStorage;
 use sammo\Util;
 use sammo\Validator;
@@ -72,7 +73,7 @@ class GetRecentRecord extends \sammo\BaseAPI
     return $history;
   }
 
-  public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+  public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
   {
     $db = DB::db();
 
diff --git a/hwe/sammo/API/InheritAction/BuyHiddenBuff.php b/hwe/sammo/API/InheritAction/BuyHiddenBuff.php
index 8aadee57..91ce0917 100644
--- a/hwe/sammo/API/InheritAction/BuyHiddenBuff.php
+++ b/hwe/sammo/API/InheritAction/BuyHiddenBuff.php
@@ -5,6 +5,7 @@ namespace sammo\API\InheritAction;
 use sammo\Session;
 use DateTimeInterface;
 use sammo\DB;
+use sammo\Enums\APIRecoveryType;
 use sammo\Enums\RankColumn;
 use sammo\GameConst;
 use sammo\General;
@@ -40,7 +41,7 @@ class BuyHiddenBuff extends \sammo\BaseAPI
         return static::REQ_GAME_LOGIN;
     }
 
-    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
     {
         $userID = $session->userID;
         $generalID = $session->generalID;
diff --git a/hwe/sammo/API/InheritAction/BuyRandomUnique.php b/hwe/sammo/API/InheritAction/BuyRandomUnique.php
index 6c134cd7..4a18a557 100644
--- a/hwe/sammo/API/InheritAction/BuyRandomUnique.php
+++ b/hwe/sammo/API/InheritAction/BuyRandomUnique.php
@@ -5,6 +5,7 @@ namespace sammo\API\InheritAction;
 use sammo\Session;
 use DateTimeInterface;
 use sammo\DB;
+use sammo\Enums\APIRecoveryType;
 use sammo\Enums\RankColumn;
 use sammo\GameConst;
 use sammo\General;
@@ -25,7 +26,7 @@ class BuyRandomUnique extends \sammo\BaseAPI
         return static::REQ_GAME_LOGIN;
     }
 
-    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
     {
         $userID = $session->userID;
         $generalID = $session->generalID;
diff --git a/hwe/sammo/API/InheritAction/GetMoreLog.php b/hwe/sammo/API/InheritAction/GetMoreLog.php
index 70466410..de8dd0e8 100644
--- a/hwe/sammo/API/InheritAction/GetMoreLog.php
+++ b/hwe/sammo/API/InheritAction/GetMoreLog.php
@@ -4,6 +4,7 @@ namespace sammo\API\InheritAction;
 
 use DateTimeInterface;
 use sammo\DB;
+use sammo\Enums\APIRecoveryType;
 use sammo\Session;
 use sammo\Validator;
 use sammo\Util;
@@ -25,7 +26,7 @@ class GetMoreLog extends \sammo\BaseAPI
     return static::REQ_GAME_LOGIN | static::REQ_READ_ONLY;
   }
 
-  function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+  function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
   {
     $userID = $session->userID;
     $lastID = $this->args['lastID'];
diff --git a/hwe/sammo/API/InheritAction/ResetSpecialWar.php b/hwe/sammo/API/InheritAction/ResetSpecialWar.php
index 1aff877d..428e9c55 100644
--- a/hwe/sammo/API/InheritAction/ResetSpecialWar.php
+++ b/hwe/sammo/API/InheritAction/ResetSpecialWar.php
@@ -5,6 +5,7 @@ namespace sammo\API\InheritAction;
 use sammo\Session;
 use DateTimeInterface;
 use sammo\DB;
+use sammo\Enums\APIRecoveryType;
 use sammo\Enums\RankColumn;
 use sammo\GameConst;
 use sammo\General;
@@ -25,7 +26,7 @@ class ResetSpecialWar extends \sammo\BaseAPI
         return static::REQ_GAME_LOGIN;
     }
 
-    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
     {
         $userID = $session->userID;
         $generalID = $session->generalID;
diff --git a/hwe/sammo/API/InheritAction/ResetTurnTime.php b/hwe/sammo/API/InheritAction/ResetTurnTime.php
index b0537bc6..ba39d6bf 100644
--- a/hwe/sammo/API/InheritAction/ResetTurnTime.php
+++ b/hwe/sammo/API/InheritAction/ResetTurnTime.php
@@ -6,6 +6,7 @@ use DateTimeImmutable;
 use sammo\Session;
 use DateTimeInterface;
 use sammo\DB;
+use sammo\Enums\APIRecoveryType;
 use sammo\Enums\RankColumn;
 use sammo\GameConst;
 use sammo\General;
@@ -30,7 +31,7 @@ class ResetTurnTime extends \sammo\BaseAPI
         return static::REQ_GAME_LOGIN;
     }
 
-    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
     {
         $userID = $session->userID;
         $generalID = $session->generalID;
diff --git a/hwe/sammo/API/InheritAction/SetNextSpecialWar.php b/hwe/sammo/API/InheritAction/SetNextSpecialWar.php
index a865293d..8d490f82 100644
--- a/hwe/sammo/API/InheritAction/SetNextSpecialWar.php
+++ b/hwe/sammo/API/InheritAction/SetNextSpecialWar.php
@@ -5,6 +5,7 @@ namespace sammo\API\InheritAction;
 use sammo\Session;
 use DateTimeInterface;
 use sammo\DB;
+use sammo\Enums\APIRecoveryType;
 use sammo\Enums\RankColumn;
 use sammo\GameConst;
 use sammo\General;
@@ -36,7 +37,7 @@ class SetNextSpecialWar extends \sammo\BaseAPI
         return static::REQ_GAME_LOGIN;
     }
 
-    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
     {
         $userID = $session->userID;
         $generalID = $session->generalID;
diff --git a/hwe/sammo/API/Message/DecideMessageResponse.php b/hwe/sammo/API/Message/DecideMessageResponse.php
index b4d4f3c2..fd4beeb0 100644
--- a/hwe/sammo/API/Message/DecideMessageResponse.php
+++ b/hwe/sammo/API/Message/DecideMessageResponse.php
@@ -6,6 +6,7 @@ use sammo\Session;
 use DateTimeInterface;
 use sammo\DB;
 use sammo\DiplomaticMessage;
+use sammo\Enums\APIRecoveryType;
 use sammo\KVStorage;
 use sammo\Message;
 use sammo\Validator;
@@ -31,7 +32,7 @@ class DecideMessageResponse extends \sammo\BaseAPI
     return static::REQ_GAME_LOGIN;
   }
 
-  public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+  public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
   {
     $msgID = $this->args['msgID'];
     $msgResponse = $this->args['response'];
diff --git a/hwe/sammo/API/Message/DeleteMessage.php b/hwe/sammo/API/Message/DeleteMessage.php
index fe1944fa..074fddb3 100644
--- a/hwe/sammo/API/Message/DeleteMessage.php
+++ b/hwe/sammo/API/Message/DeleteMessage.php
@@ -4,6 +4,7 @@ namespace sammo\API\Message;
 
 use sammo\Session;
 use DateTimeInterface;
+use sammo\Enums\APIRecoveryType;
 use sammo\Message;
 use sammo\Validator;
 
@@ -27,7 +28,7 @@ class DeleteMessage extends \sammo\BaseAPI
     return static::REQ_GAME_LOGIN;
   }
 
-  public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+  public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
   {
     $msgID = $this->args['msgID'];
 
diff --git a/hwe/sammo/API/Message/GetContactList.php b/hwe/sammo/API/Message/GetContactList.php
index 61777705..c994e755 100644
--- a/hwe/sammo/API/Message/GetContactList.php
+++ b/hwe/sammo/API/Message/GetContactList.php
@@ -4,6 +4,7 @@ namespace sammo\API\Message;
 
 use sammo\Session;
 use DateTimeInterface;
+use sammo\Enums\APIRecoveryType;
 
 use function sammo\getMailboxList;
 
@@ -18,7 +19,7 @@ class GetContactList extends \sammo\BaseAPI{
     return static::REQ_GAME_LOGIN | static::REQ_READ_ONLY;
   }
 
-  public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+  public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
   {
     if(!$session->generalID){
       return [
diff --git a/hwe/sammo/API/Message/GetOldMessage.php b/hwe/sammo/API/Message/GetOldMessage.php
index 36f38f30..e683d086 100644
--- a/hwe/sammo/API/Message/GetOldMessage.php
+++ b/hwe/sammo/API/Message/GetOldMessage.php
@@ -5,6 +5,7 @@ namespace sammo\API\Message;
 use sammo\Session;
 use DateTimeInterface;
 use sammo\DB;
+use sammo\Enums\APIRecoveryType;
 use sammo\Enums\MessageType;
 use sammo\Json;
 use sammo\Message;
@@ -65,7 +66,7 @@ class GetOldMessage extends \sammo\BaseAPI
     }
   }
 
-  public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+  public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
   {
     $this->delayFrequentCall($session);
     $session->setReadOnly();
diff --git a/hwe/sammo/API/Message/GetRecentMessage.php b/hwe/sammo/API/Message/GetRecentMessage.php
index 815ba283..09218325 100644
--- a/hwe/sammo/API/Message/GetRecentMessage.php
+++ b/hwe/sammo/API/Message/GetRecentMessage.php
@@ -5,6 +5,7 @@ namespace sammo\API\Message;
 use sammo\Session;
 use DateTimeInterface;
 use sammo\DB;
+use sammo\Enums\APIRecoveryType;
 use sammo\Enums\MessageType;
 use sammo\Json;
 use sammo\Message;
@@ -61,7 +62,7 @@ class GetRecentMessage extends \sammo\BaseAPI
     }
   }
 
-  public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+  public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
   {
     $this->delayFrequentCall($session);
     $session->setReadOnly();
diff --git a/hwe/sammo/API/Message/SendMessage.php b/hwe/sammo/API/Message/SendMessage.php
index 96452624..cc740342 100644
--- a/hwe/sammo/API/Message/SendMessage.php
+++ b/hwe/sammo/API/Message/SendMessage.php
@@ -5,6 +5,7 @@ namespace sammo\API\Message;
 use sammo\Session;
 use DateTimeInterface;
 use sammo\DB;
+use sammo\Enums\APIRecoveryType;
 use sammo\Enums\MessageType;
 use sammo\Message;
 use sammo\MessageTarget;
@@ -145,7 +146,7 @@ class SendMessage extends \sammo\BaseAPI
     return $msg;
   }
 
-  public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+  public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
   {
     $userID = $session->userID;
     $mailbox = $this->args['mailbox'];
diff --git a/hwe/sammo/API/Misc/UploadImage.php b/hwe/sammo/API/Misc/UploadImage.php
index 0fdb9226..e2febed4 100644
--- a/hwe/sammo/API/Misc/UploadImage.php
+++ b/hwe/sammo/API/Misc/UploadImage.php
@@ -5,6 +5,7 @@ namespace sammo\API\Misc;
 use sammo\Session;
 use DateTimeInterface;
 use sammo\AppConf;
+use sammo\Enums\APIRecoveryType;
 use sammo\KVStorage;
 use sammo\RootDB;
 use sammo\TimeUtil;
@@ -31,7 +32,7 @@ class UploadImage extends \sammo\BaseAPI
         return static::REQ_GAME_LOGIN | static::REQ_READ_ONLY;
     }
 
-    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
     {
         $imageData = base64_decode($this->args['imageData'], true);
         if ($imageData === false) {
diff --git a/hwe/sammo/API/Nation/GeneralList.php b/hwe/sammo/API/Nation/GeneralList.php
index 26cf933b..7aee9809 100644
--- a/hwe/sammo/API/Nation/GeneralList.php
+++ b/hwe/sammo/API/Nation/GeneralList.php
@@ -4,6 +4,7 @@ namespace sammo\API\Nation;
 
 use ArrayObject;
 use sammo\DB;
+use sammo\Enums\APIRecoveryType;
 use sammo\General;
 use sammo\Session;
 use sammo\Util;
@@ -133,7 +134,7 @@ class GeneralList extends \sammo\BaseAPI
         return 1;
     }
 
-    public function launch(Session $session, ?\DateTimeInterface $modifiedSince, ?string $reqEtag)
+    public function launch(Session $session, ?\DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
     {
         increaseRefresh("세력장수", 1);
 
@@ -188,14 +189,14 @@ class GeneralList extends \sammo\BaseAPI
             foreach($troops as $troop){
                 $reservedCommandTargetGeneralIDList[$troop['id']] = $troop['id'];
             }
-            
+
 
             if($reservedCommandTargetGeneralIDList){
                 $rawTurnList = $db->query(
                     'SELECT general_id, turn_idx, action, arg, brief FROM general_turn WHERE general_id IN %li AND turn_idx < 5 ORDER BY general_id asc, turn_idx asc',
                     array_values($reservedCommandTargetGeneralIDList)
                 );
-    
+
                 foreach ($rawTurnList as $rawTurn) {
                     [
                         'general_id' => $generalID,
diff --git a/hwe/sammo/API/Nation/GetGeneralLog.php b/hwe/sammo/API/Nation/GetGeneralLog.php
index 96aa2893..1be029b2 100644
--- a/hwe/sammo/API/Nation/GetGeneralLog.php
+++ b/hwe/sammo/API/Nation/GetGeneralLog.php
@@ -3,6 +3,7 @@
 namespace sammo\API\Nation;
 
 use sammo\DB;
+use sammo\Enums\APIRecoveryType;
 use sammo\Session;
 use sammo\Validator;
 
@@ -99,7 +100,7 @@ class GetGeneralLog extends \sammo\BaseAPI
         return $this->args['generalID'];
     }
 
-    public function launch(Session $session, ?\DateTimeInterface $modifiedSince, ?string $reqEtag)
+    public function launch(Session $session, ?\DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
     {
         $userID = $session->userID;
 
diff --git a/hwe/sammo/API/Nation/GetNationInfo.php b/hwe/sammo/API/Nation/GetNationInfo.php
index f7eae16f..25eade4f 100644
--- a/hwe/sammo/API/Nation/GetNationInfo.php
+++ b/hwe/sammo/API/Nation/GetNationInfo.php
@@ -3,6 +3,7 @@
 namespace sammo\API\Nation;
 
 use sammo\DB;
+use sammo\Enums\APIRecoveryType;
 use sammo\GameConst;
 use sammo\General;
 use sammo\KVStorage;
@@ -40,7 +41,7 @@ class GetNationInfo extends \sammo\BaseAPI
     return static::REQ_GAME_LOGIN | static::REQ_READ_ONLY;
   }
 
-  public function launch(Session $session, ?\DateTimeInterface $modifiedSince, ?string $reqEtag)
+  public function launch(Session $session, ?\DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
   {
     $userID = $session->userID;
 
diff --git a/hwe/sammo/API/Nation/SetBill.php b/hwe/sammo/API/Nation/SetBill.php
index bd5bc505..09eda18e 100644
--- a/hwe/sammo/API/Nation/SetBill.php
+++ b/hwe/sammo/API/Nation/SetBill.php
@@ -5,6 +5,7 @@ namespace sammo\API\Nation;
 use sammo\Session;
 use DateTimeInterface;
 use sammo\DB;
+use sammo\Enums\APIRecoveryType;
 use sammo\KVStorage;
 use sammo\Validator;
 use sammo\WebUtil;
@@ -34,7 +35,7 @@ class SetBill extends \sammo\BaseAPI
         return static::REQ_GAME_LOGIN | static::REQ_READ_ONLY;
     }
 
-    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
     {
         $amount = $this->args['amount'];
         $userID = $session->userID;
diff --git a/hwe/sammo/API/Nation/SetBlockScout.php b/hwe/sammo/API/Nation/SetBlockScout.php
index ff7eb49f..b518b102 100644
--- a/hwe/sammo/API/Nation/SetBlockScout.php
+++ b/hwe/sammo/API/Nation/SetBlockScout.php
@@ -5,6 +5,7 @@ namespace sammo\API\Nation;
 use sammo\Session;
 use DateTimeInterface;
 use sammo\DB;
+use sammo\Enums\APIRecoveryType;
 use sammo\KVStorage;
 use sammo\Validator;
 use sammo\WebUtil;
@@ -32,7 +33,7 @@ class SetBlockScout extends \sammo\BaseAPI
         return static::REQ_GAME_LOGIN | static::REQ_READ_ONLY;
     }
 
-    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
     {
         $value = $this->args['value'];
         $userID = $session->userID;
diff --git a/hwe/sammo/API/Nation/SetBlockWar.php b/hwe/sammo/API/Nation/SetBlockWar.php
index 78153cf3..ce72af0b 100644
--- a/hwe/sammo/API/Nation/SetBlockWar.php
+++ b/hwe/sammo/API/Nation/SetBlockWar.php
@@ -5,6 +5,7 @@ namespace sammo\API\Nation;
 use sammo\Session;
 use DateTimeInterface;
 use sammo\DB;
+use sammo\Enums\APIRecoveryType;
 use sammo\KVStorage;
 use sammo\Validator;
 use sammo\WebUtil;
@@ -32,7 +33,7 @@ class SetBlockWar extends \sammo\BaseAPI
         return static::REQ_GAME_LOGIN | static::REQ_READ_ONLY;
     }
 
-    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
     {
         $value = $this->args['value'];
         $userID = $session->userID;
diff --git a/hwe/sammo/API/Nation/SetNotice.php b/hwe/sammo/API/Nation/SetNotice.php
index c52c5dc1..8c2fa1aa 100644
--- a/hwe/sammo/API/Nation/SetNotice.php
+++ b/hwe/sammo/API/Nation/SetNotice.php
@@ -5,6 +5,7 @@ namespace sammo\API\Nation;
 use sammo\Session;
 use DateTimeInterface;
 use sammo\DB;
+use sammo\Enums\APIRecoveryType;
 use sammo\KVStorage;
 use sammo\TimeUtil;
 use sammo\Validator;
@@ -32,7 +33,7 @@ class SetNotice extends \sammo\BaseAPI
         return static::REQ_GAME_LOGIN | static::REQ_READ_ONLY;
     }
 
-    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
     {
         $msg = $this->args['msg'];
         $userID = $session->userID;
diff --git a/hwe/sammo/API/Nation/SetRate.php b/hwe/sammo/API/Nation/SetRate.php
index 937606b5..09c43399 100644
--- a/hwe/sammo/API/Nation/SetRate.php
+++ b/hwe/sammo/API/Nation/SetRate.php
@@ -5,6 +5,7 @@ namespace sammo\API\Nation;
 use sammo\Session;
 use DateTimeInterface;
 use sammo\DB;
+use sammo\Enums\APIRecoveryType;
 use sammo\KVStorage;
 use sammo\Validator;
 use sammo\WebUtil;
@@ -34,7 +35,7 @@ class SetRate extends \sammo\BaseAPI
         return static::REQ_GAME_LOGIN | static::REQ_READ_ONLY;
     }
 
-    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
     {
         $amount = $this->args['amount'];
         $userID = $session->userID;
diff --git a/hwe/sammo/API/Nation/SetScoutMsg.php b/hwe/sammo/API/Nation/SetScoutMsg.php
index d48bed93..6baaa69a 100644
--- a/hwe/sammo/API/Nation/SetScoutMsg.php
+++ b/hwe/sammo/API/Nation/SetScoutMsg.php
@@ -5,6 +5,7 @@ namespace sammo\API\Nation;
 use sammo\Session;
 use DateTimeInterface;
 use sammo\DB;
+use sammo\Enums\APIRecoveryType;
 use sammo\KVStorage;
 use sammo\Validator;
 use sammo\WebUtil;
@@ -31,7 +32,7 @@ class SetScoutMsg extends \sammo\BaseAPI
         return static::REQ_GAME_LOGIN | static::REQ_READ_ONLY;
     }
 
-    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
     {
         $msg = $this->args['msg'];
         $userID = $session->userID;
diff --git a/hwe/sammo/API/Nation/SetSecretLimit.php b/hwe/sammo/API/Nation/SetSecretLimit.php
index 10f4c1da..7220e4d2 100644
--- a/hwe/sammo/API/Nation/SetSecretLimit.php
+++ b/hwe/sammo/API/Nation/SetSecretLimit.php
@@ -5,6 +5,7 @@ namespace sammo\API\Nation;
 use sammo\Session;
 use DateTimeInterface;
 use sammo\DB;
+use sammo\Enums\APIRecoveryType;
 use sammo\KVStorage;
 use sammo\Validator;
 use sammo\WebUtil;
@@ -34,7 +35,7 @@ class SetSecretLimit extends \sammo\BaseAPI
         return static::REQ_GAME_LOGIN | static::REQ_READ_ONLY;
     }
 
-    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
     {
         $amount = $this->args['amount'];
         $userID = $session->userID;
diff --git a/hwe/sammo/API/Nation/SetTroopName.php b/hwe/sammo/API/Nation/SetTroopName.php
index 0dec998b..b7e8ef1c 100644
--- a/hwe/sammo/API/Nation/SetTroopName.php
+++ b/hwe/sammo/API/Nation/SetTroopName.php
@@ -5,6 +5,7 @@ namespace sammo\API\Nation;
 use sammo\Session;
 use DateTimeInterface;
 use sammo\DB;
+use sammo\Enums\APIRecoveryType;
 use sammo\StringUtil;
 use sammo\Validator;
 
@@ -34,7 +35,7 @@ class SetTroopName extends \sammo\BaseAPI
     return static::REQ_GAME_LOGIN | static::REQ_READ_ONLY;
   }
 
-  public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+  public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
   {
     $userID = $session->userID;
     $db = DB::db();
diff --git a/hwe/sammo/API/NationCommand/GetReservedCommand.php b/hwe/sammo/API/NationCommand/GetReservedCommand.php
index 585e8e79..5eb77e1a 100644
--- a/hwe/sammo/API/NationCommand/GetReservedCommand.php
+++ b/hwe/sammo/API/NationCommand/GetReservedCommand.php
@@ -5,6 +5,7 @@ namespace sammo\API\NationCommand;
 use sammo\Session;
 use DateTimeInterface;
 use sammo\DB;
+use sammo\Enums\APIRecoveryType;
 use sammo\GameConst;
 use sammo\General;
 use sammo\Json;
@@ -29,7 +30,7 @@ class GetReservedCommand extends \sammo\BaseAPI
         return static::REQ_GAME_LOGIN | static::REQ_READ_ONLY;
     }
 
-    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
     {
         $db = DB::db();
 
diff --git a/hwe/sammo/API/NationCommand/PushCommand.php b/hwe/sammo/API/NationCommand/PushCommand.php
index dc990e55..c3f9e14d 100644
--- a/hwe/sammo/API/NationCommand/PushCommand.php
+++ b/hwe/sammo/API/NationCommand/PushCommand.php
@@ -5,6 +5,7 @@ namespace sammo\API\NationCommand;
 use sammo\Session;
 use DateTimeInterface;
 use sammo\DB;
+use sammo\Enums\APIRecoveryType;
 use sammo\Validator;
 
 use function sammo\pushNationCommand;
@@ -32,7 +33,7 @@ class PushCommand extends \sammo\BaseAPI
         return static::REQ_GAME_LOGIN | static::REQ_READ_ONLY;
     }
 
-    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
     {
         $amount = $this->args['amount'];
         if($amount == 0){
diff --git a/hwe/sammo/API/NationCommand/RepeatCommand.php b/hwe/sammo/API/NationCommand/RepeatCommand.php
index 24961a1f..82f50936 100644
--- a/hwe/sammo/API/NationCommand/RepeatCommand.php
+++ b/hwe/sammo/API/NationCommand/RepeatCommand.php
@@ -5,6 +5,7 @@ namespace sammo\API\NationCommand;
 use sammo\Session;
 use DateTimeInterface;
 use sammo\DB;
+use sammo\Enums\APIRecoveryType;
 use sammo\Validator;
 
 use function sammo\repeatNationCommand;
@@ -32,7 +33,7 @@ class RepeatCommand extends \sammo\BaseAPI
         return static::REQ_GAME_LOGIN | static::REQ_READ_ONLY;
     }
 
-    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
     {
 
         $amount = $this->args['amount'];
diff --git a/hwe/sammo/API/NationCommand/ReserveBulkCommand.php b/hwe/sammo/API/NationCommand/ReserveBulkCommand.php
index b8da199d..12211f25 100644
--- a/hwe/sammo/API/NationCommand/ReserveBulkCommand.php
+++ b/hwe/sammo/API/NationCommand/ReserveBulkCommand.php
@@ -4,6 +4,7 @@ namespace sammo\API\NationCommand;
 
 use sammo\Session;
 use DateTimeInterface;
+use sammo\Enums\APIRecoveryType;
 use sammo\GameConst;
 use sammo\Util;
 use sammo\Validator;
@@ -36,7 +37,7 @@ class ReserveBulkCommand extends \sammo\BaseAPI
         return static::REQ_GAME_LOGIN | static::REQ_READ_ONLY;
     }
 
-    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
     {
         $briefList = [];
         foreach ($this->args as $idx => $turn) {
diff --git a/hwe/sammo/API/NationCommand/ReserveCommand.php b/hwe/sammo/API/NationCommand/ReserveCommand.php
index 42a3ccbc..c6d98803 100644
--- a/hwe/sammo/API/NationCommand/ReserveCommand.php
+++ b/hwe/sammo/API/NationCommand/ReserveCommand.php
@@ -4,6 +4,7 @@ namespace sammo\API\NationCommand;
 
 use sammo\Session;
 use DateTimeInterface;
+use sammo\Enums\APIRecoveryType;
 use sammo\GameConst;
 use sammo\Util;
 use sammo\Validator;
@@ -33,7 +34,7 @@ class ReserveCommand extends \sammo\BaseAPI
         return static::REQ_GAME_LOGIN | static::REQ_READ_ONLY;
     }
 
-    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
     {
         $action = $this->args['action'];
         $turnList = $this->args['turnList'];
diff --git a/hwe/sammo/API/Troop/ExitTroop.php b/hwe/sammo/API/Troop/ExitTroop.php
index 0d71879c..22b4f62b 100644
--- a/hwe/sammo/API/Troop/ExitTroop.php
+++ b/hwe/sammo/API/Troop/ExitTroop.php
@@ -5,6 +5,7 @@ namespace sammo\API\Troop;
 use sammo\Session;
 use DateTimeInterface;
 use sammo\DB;
+use sammo\Enums\APIRecoveryType;
 
 class ExitTroop extends \sammo\BaseAPI
 {
@@ -18,7 +19,7 @@ class ExitTroop extends \sammo\BaseAPI
     return static::REQ_GAME_LOGIN;
   }
 
-  public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+  public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
   {
     $generalID = $session->generalID;
     $db = DB::db();
diff --git a/hwe/sammo/API/Troop/JoinTroop.php b/hwe/sammo/API/Troop/JoinTroop.php
index 42477001..ee2b1491 100644
--- a/hwe/sammo/API/Troop/JoinTroop.php
+++ b/hwe/sammo/API/Troop/JoinTroop.php
@@ -5,6 +5,7 @@ namespace sammo\API\Troop;
 use sammo\Session;
 use DateTimeInterface;
 use sammo\DB;
+use sammo\Enums\APIRecoveryType;
 use sammo\StringUtil;
 use sammo\Validator;
 
@@ -29,7 +30,7 @@ class JoinTroop extends \sammo\BaseAPI
     return static::REQ_GAME_LOGIN;
   }
 
-  public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+  public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
   {
     $userID = $session->userID;
     $troopID = $this->args['troopID'];
diff --git a/hwe/sammo/API/Troop/KickFromTroop.php b/hwe/sammo/API/Troop/KickFromTroop.php
index 619fc753..6e62924f 100644
--- a/hwe/sammo/API/Troop/KickFromTroop.php
+++ b/hwe/sammo/API/Troop/KickFromTroop.php
@@ -5,6 +5,7 @@ namespace sammo\API\Troop;
 use sammo\Session;
 use DateTimeInterface;
 use sammo\DB;
+use sammo\Enums\APIRecoveryType;
 use sammo\Validator;
 
 class KickFromTroop extends \sammo\BaseAPI
@@ -31,7 +32,7 @@ class KickFromTroop extends \sammo\BaseAPI
     return static::REQ_GAME_LOGIN;
   }
 
-  public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+  public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
   {
     $generalID = $this->args['generalID'];
     $db = DB::db();
diff --git a/hwe/sammo/API/Troop/NewTroop.php b/hwe/sammo/API/Troop/NewTroop.php
index 69e5521f..c9815490 100644
--- a/hwe/sammo/API/Troop/NewTroop.php
+++ b/hwe/sammo/API/Troop/NewTroop.php
@@ -5,6 +5,7 @@ namespace sammo\API\Troop;
 use sammo\Session;
 use DateTimeInterface;
 use sammo\DB;
+use sammo\Enums\APIRecoveryType;
 use sammo\StringUtil;
 use sammo\Validator;
 
@@ -29,7 +30,7 @@ class NewTroop extends \sammo\BaseAPI
     return static::REQ_GAME_LOGIN;
   }
 
-  public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+  public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
   {
     $userID = $session->userID;
     $troopName = StringUtil::neutralize($this->args['troopName']);
diff --git a/hwe/sammo/API/Troop/SetTroopName.php b/hwe/sammo/API/Troop/SetTroopName.php
index a59cdfb7..6e848b09 100644
--- a/hwe/sammo/API/Troop/SetTroopName.php
+++ b/hwe/sammo/API/Troop/SetTroopName.php
@@ -5,6 +5,7 @@ namespace sammo\API\Troop;
 use sammo\Session;
 use DateTimeInterface;
 use sammo\DB;
+use sammo\Enums\APIRecoveryType;
 use sammo\StringUtil;
 use sammo\Validator;
 
@@ -33,7 +34,7 @@ class SetTroopName extends \sammo\BaseAPI
     return static::REQ_GAME_LOGIN | static::REQ_READ_ONLY;
   }
 
-  public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+  public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
   {
     $userID = $session->userID;
     $db = DB::db();
diff --git a/hwe/sammo/API/Vote/AddComment.php b/hwe/sammo/API/Vote/AddComment.php
index f3811157..1d27a9aa 100644
--- a/hwe/sammo/API/Vote/AddComment.php
+++ b/hwe/sammo/API/Vote/AddComment.php
@@ -5,6 +5,7 @@ namespace sammo\API\Vote;
 use DateTimeInterface;
 use sammo\DB;
 use sammo\DTO\VoteComment;
+use sammo\Enums\APIRecoveryType;
 use sammo\General;
 use sammo\Session;
 use sammo\TimeUtil;
@@ -33,7 +34,7 @@ class AddComment extends \sammo\BaseAPI
     return null;
   }
 
-  function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+  function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
   {
     $voteID = $this->args['voteID'];
     $text = mb_substr($this->args['text'], 0, 200);
diff --git a/hwe/sammo/API/Vote/GetVoteDetail.php b/hwe/sammo/API/Vote/GetVoteDetail.php
index 07b71f01..26496aef 100644
--- a/hwe/sammo/API/Vote/GetVoteDetail.php
+++ b/hwe/sammo/API/Vote/GetVoteDetail.php
@@ -7,6 +7,7 @@ use DateTimeInterface;
 use sammo\DB;
 use sammo\DTO\VoteComment;
 use sammo\DTO\VoteInfo;
+use sammo\Enums\APIRecoveryType;
 use sammo\Json;
 use sammo\KVStorage;
 use sammo\Validator;
@@ -30,7 +31,7 @@ class GetVoteDetail extends \sammo\BaseAPI
     return static::REQ_LOGIN | static::REQ_READ_ONLY;
   }
 
-  public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+  public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
   {
     $voteID = $this->args['voteID'];
     $db = DB::db();
diff --git a/hwe/sammo/API/Vote/GetVoteList.php b/hwe/sammo/API/Vote/GetVoteList.php
index 93ba279c..810e151e 100644
--- a/hwe/sammo/API/Vote/GetVoteList.php
+++ b/hwe/sammo/API/Vote/GetVoteList.php
@@ -5,6 +5,7 @@ namespace sammo\API\Vote;
 use DateTimeInterface;
 use sammo\DB;
 use sammo\DTO\VoteInfo;
+use sammo\Enums\APIRecoveryType;
 use sammo\KVStorage;
 use sammo\Session;
 
@@ -21,7 +22,7 @@ class GetVoteList extends \sammo\BaseAPI
     return static::REQ_LOGIN | static::REQ_READ_ONLY;
   }
 
-  public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+  public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
   {
     $db = DB::db();
 
diff --git a/hwe/sammo/API/Vote/NewVote.php b/hwe/sammo/API/Vote/NewVote.php
index 47cb1544..519dd078 100644
--- a/hwe/sammo/API/Vote/NewVote.php
+++ b/hwe/sammo/API/Vote/NewVote.php
@@ -5,6 +5,7 @@ namespace sammo\API\Vote;
 use DateTimeInterface;
 use sammo\DB;
 use sammo\DTO\VoteInfo;
+use sammo\Enums\APIRecoveryType;
 use sammo\KVStorage;
 use sammo\Session;
 use sammo\TimeUtil;
@@ -52,7 +53,7 @@ class NewVote extends \sammo\BaseAPI
         $voteStor->setValue("vote_{$voteID}", $lastVoteInfo->toArray());
     }
 
-    function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+    function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
     {
         $isVoteAdmin = in_array('vote', $session->acl[DB::prefix()] ?? []);
         $isVoteAdmin = $isVoteAdmin || $session->userGrade >= 5;
diff --git a/hwe/sammo/API/Vote/Vote.php b/hwe/sammo/API/Vote/Vote.php
index f530044a..05a5e1db 100644
--- a/hwe/sammo/API/Vote/Vote.php
+++ b/hwe/sammo/API/Vote/Vote.php
@@ -5,6 +5,7 @@ namespace sammo\API\Vote;
 use DateTimeInterface;
 use sammo\DB;
 use sammo\DTO\VoteInfo;
+use sammo\Enums\APIRecoveryType;
 use sammo\General;
 use sammo\Json;
 use sammo\KVStorage;
@@ -42,7 +43,7 @@ class Vote extends \sammo\BaseAPI
         return null;
     }
 
-    function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+    function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
     {
 
         $voteID = $this->args['voteID'];
diff --git a/src/sammo/API/Login/LoginByID.php b/src/sammo/API/Login/LoginByID.php
index b12fdbc1..c88f9d6b 100644
--- a/src/sammo/API/Login/LoginByID.php
+++ b/src/sammo/API/Login/LoginByID.php
@@ -5,7 +5,9 @@ namespace sammo\API\Login;
 use DateTime;
 use sammo\Session;
 use DateTimeInterface;
+use sammo\APIHelper;
 use sammo\BaseAPI;
+use sammo\Enums\APIRecoveryType;
 use sammo\Json;
 use sammo\KakaoUtil;
 use sammo\RootDB;
@@ -78,7 +80,7 @@ class LoginByID extends \sammo\BaseAPI
         return [$tokenID, $token];
     }
 
-    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
     {
         $RootDB = RootDB::db();
         if ($session->isLoggedIn()) {
@@ -143,7 +145,7 @@ class LoginByID extends \sammo\BaseAPI
                 return [
                     'result' => false,
                     'reqOTP' => $oauthReqOTP,
-                    'reason' => $oauthFailReason
+                    'reason' => $oauthFailReason,
                 ];
             }
         }
diff --git a/src/sammo/API/Login/LoginByToken.php b/src/sammo/API/Login/LoginByToken.php
index b8ef9a51..43385c9b 100644
--- a/src/sammo/API/Login/LoginByToken.php
+++ b/src/sammo/API/Login/LoginByToken.php
@@ -5,6 +5,7 @@ namespace sammo\API\Login;
 use sammo\Session;
 use DateTimeInterface;
 use sammo\BaseAPI;
+use sammo\Enums\APIRecoveryType;
 use sammo\Json;
 use sammo\KakaoUtil;
 use sammo\RootDB;
@@ -36,7 +37,7 @@ class LoginByToken extends LoginByID
         return null;
     }
 
-    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
     {
         $loginNonce = $session->loginNonce ?? null;
         $loginNonceExpired = $session->loginNonceExpired ?? null;
diff --git a/src/sammo/API/Login/ReqNonce.php b/src/sammo/API/Login/ReqNonce.php
index 4c04fa7e..ae3da82b 100644
--- a/src/sammo/API/Login/ReqNonce.php
+++ b/src/sammo/API/Login/ReqNonce.php
@@ -5,6 +5,7 @@ namespace sammo\API\Login;
 use sammo\Session;
 use DateTimeInterface;
 use sammo\BaseAPI;
+use sammo\Enums\APIRecoveryType;
 use sammo\Json;
 use sammo\KakaoUtil;
 use sammo\RootDB;
@@ -12,9 +13,11 @@ use sammo\TimeUtil;
 use sammo\Util;
 use sammo\Validator;
 
-class ReqNonce extends BaseAPI{
+class ReqNonce extends BaseAPI
+{
 
-    public function getRequiredSessionMode(): int {
+    public function getRequiredSessionMode(): int
+    {
         return \sammo\BaseAPI::NO_LOGIN;
     }
 
@@ -23,15 +26,15 @@ class ReqNonce extends BaseAPI{
         return null;
     }
 
-    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag) {
+    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
+    {
         $loginNonce = Util::randomStr(16);
         $loginNonceExpired = TimeUtil::nowAddSeconds(2);
         $session->loginNonce = $loginNonce;
         $session->loginNonceExpired = $loginNonceExpired;
         return [
-            'result'=>true,
-            'loginNonce'=>$loginNonce,
+            'result' => true,
+            'loginNonce' => $loginNonce,
         ];
     }
-
-}
\ No newline at end of file
+}
diff --git a/src/sammo/BaseAPI.php b/src/sammo/BaseAPI.php
index f33d080e..7cdde225 100644
--- a/src/sammo/BaseAPI.php
+++ b/src/sammo/BaseAPI.php
@@ -2,6 +2,8 @@
 
 namespace sammo;
 
+use sammo\Enums\APIRecoveryType;
+
 abstract class BaseAPI
 {
     const NO_SESSION = -1;
@@ -13,7 +15,8 @@ abstract class BaseAPI
     static array $sensitiveArgs = [];
     static bool $allowExternalAPI = true;
 
-    public function getFilteredArgs(): array {
+    public function getFilteredArgs(): array
+    {
         $filteredArgs = $this->args;
         foreach (static::$sensitiveArgs as $argName) {
             if (isset($filteredArgs[$argName])) {
@@ -33,10 +36,10 @@ abstract class BaseAPI
     abstract public function getRequiredSessionMode(): int;
     abstract function validateArgs(): ?string;
 
-    /** @return null|string|array */
-    abstract function launch(Session $session, ?\DateTimeInterface $modifiedSince, ?string $reqEtag);
+    abstract function launch(Session $session, ?\DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType;
 
-    public function tryCache():?APICacheResult{
+    public function tryCache(): ?APICacheResult
+    {
         return null;
     }
 }