diff --git a/webapp/controller/BlockChainController.class.php b/webapp/controller/BlockChainController.class.php
index bdce3bbe..bfc843ac 100644
--- a/webapp/controller/BlockChainController.class.php
+++ b/webapp/controller/BlockChainController.class.php
@@ -124,7 +124,26 @@ class BlockChainController extends BaseAuthedController {
 
     public function evolve721Nft()
     {
+        $type = getReqVal('type', '');
+        $tokenId1 = getReqVal('token_id1', '');
+        $tokenId2 = getReqVal('token_id2', '');
+        switch ($type) {
+        case 1:
+        {
 
+        }
+        break;
+        case 2:
+        {
+
+        }
+        break;
+        default:
+        {
+            myself()->_rspErr(1, 'type param error');
+            return;
+        }
+        }
     }
 
     public function evolveChip()
@@ -458,6 +477,40 @@ class BlockChainController extends BaseAuthedController {
         }
     }
 
+    private function internalBcCall($params, $transParams) {
+        $url = self::getWeb3ServiceUrl();
+        $response = '';
+        if (!phpcommon\HttpClient::get
+            ($url,
+             $params,
+             $response)) {
+            myself()->_rspErr(500,  'server internal error');
+            die();
+            return;
+        }
+        error_log($response);
+        $rspObj = json_decode($response, true);
+        if ($rspObj['errcode'] == 0) {
+            $transId = $rspObj['trans_id'];
+            Transaction::add(
+                $transId,
+                $transParams['action'],
+                $transParams['tokenId'],
+                $transParams['tokenType'],
+                $transParams['itemUniId'],
+                $transParams['itemId']
+            );
+            myself()->_rspData(array(
+                'trans_id' => $transId,
+                'params' => $rspObj['params']
+            ));
+        } else {
+            myself()->_rspErr(500,  'server internal error');
+            die();
+            return;
+        }
+    }
+
     private static function getWeb3ServiceUrl()
     {
         if (SERVER_ENV == _TEST) {
diff --git a/webapp/models/Gun.php b/webapp/models/Gun.php
index 955940fb..aa09dbac 100644
--- a/webapp/models/Gun.php
+++ b/webapp/models/Gun.php
@@ -47,6 +47,24 @@ class Gun extends BaseModel {
         return $row;
     }
 
+    public static function findByTokenId($tokenId)
+    {
+        $row = SqlHelper::ormSelectOne(
+            myself()->_getMysql($tokenId),
+            't_gun',
+            array(
+                'token_id' => $tokenId,
+            )
+        );
+        if ($row) {
+            $row['gun_uniid'] = $row['idx'];
+            if (!NftService::isEquipOwner(myself()->_getOpenId(), $row['token_id'])) {
+                $row = null;
+            }
+        }
+        return $row;
+    }
+
     public static function findByAccountId($accountId, $gunUniId)
     {
         return self::internalFind($accountId, $gunUniId);
diff --git a/webapp/models/Hero.php b/webapp/models/Hero.php
index e66a6212..1d3f5a27 100644
--- a/webapp/models/Hero.php
+++ b/webapp/models/Hero.php
@@ -44,6 +44,24 @@ class Hero extends BaseModel {
         return self::internalFind($accountId, $heroUniId);
     }
 
+    public static function findByTokenId($tokenId)
+    {
+        $row = SqlHelper::ormSelectOne(
+            myself()->_getMysql($tokenId),
+            't_hero',
+            array(
+                'token_id' => $tokenId,
+            )
+        );
+        if ($row) {
+            $row['hero_uniid'] = $row['idx'];
+            if (!NftService::isHeroOwner(myself()->_getOpenId(), $row['token_id'])) {
+                $row = null;
+            }
+        }
+        return $row;
+    }
+
     private static function internalFind($accountId, $heroUniId)
     {
         $row = SqlHelper::ormSelectOne(