diff --git a/api_functions.py b/api_functions.py
new file mode 100644
index 0000000..285d3ff
--- /dev/null
+++ b/api_functions.py
@@ -0,0 +1,26 @@
+def isEnd(cur, trueChatID):
+    # cur.execute(f"SELECT ChatID FROM Chats WHERE TrueChatID = '{trueChatID}'")
+    # row = cur.fetchall()
+    # chatID = row[0]
+    #
+    # cur.execute(f"SELECT UserID FROM UsersChats WHERE ChatID = '{chatID}'")
+    # usersIDs = cur.fetchall()
+    #
+    # allAlive = True
+    # for id in usersIDs:
+    #     cur.execute(f"SELECT isAlive FROM Users WHERE UserID = '{id}', role = ")
+    #     row = cur.fetchall()
+    #     if row[0] == False:
+    #         allAlive = False
+
+    cur.execute(f"Select role from chats join userschats uc on uc.chatid = chats.chatid join "
+                f"users on users.userid = uc.userid where truechatid = '{trueChatID}' and isAlive = true")
+    roles = cur.fetchall()
+
+    m = roles.count(4)
+    if m == 0:
+        return "citizens"
+    elif m >= len(roles) - m:
+        return "mafia"
+
+    return ""
diff --git a/app.py b/app.py
index 9958ace..5361a26 100644
--- a/app.py
+++ b/app.py
@@ -1,12 +1,43 @@
-from flask import Flask, request
+from flask import Flask, request, jsonify
 import db
+import api_functions
+
 
 app = Flask(__name__)
 
 
-@app.route('/')
-def hello_world():  # put application's code here
-    return 'Hello World!'
+@app.route('/action', methods=["POST"])
+def action():  # put application's code here
+    data = request.json
+    trueChatID = data['chatID']
+    killedUserID = data['KilledUserID']
+    healedUserID = data['HealedUserID']
+    checkedUserID = data['CheckedUserID']
+
+    response = {
+        "killedUserId": "",
+        "isEndGame": "",
+        "checkedRole": False
+    }
+
+    cur = db.cursor
+
+    if killedUserID != healedUserID:
+        cur.execute(f"Select UserID from chats join userschats uc on uc.chatid = chats.chatid join "
+                f"users on users.userid = uc.userid where truechatid = '{trueChatID}' and TrueUserID = '{killedUserID}'")
+        id = cur.fetchall()[0]
+        cur.execute(f"UPDATE Users SET isAlive = false WHERE UserID = '{id}'")
+        response["killedUserId"] = killedUserID
+
+    cur.execute(f"SELECT role FROM users WHERE TrueUserID ='{checkedUserID}';")
+    role = cur.fetchall()[0]
+
+    if role == 4:
+        response["checkedRole"] = True
+
+    response["isEndGame"] = api_functions.isEnd(cur, trueChatID)
+
+    return jsonify(response), 200
 
 
 @app.route('/create_game', methods=["POST"])
diff --git a/db.py b/db.py
index e8c021a..43d3b4f 100644
--- a/db.py
+++ b/db.py
@@ -8,6 +8,7 @@ db_params = {
     'password': '4oumQk'
 }
 
+
 connection = psycopg2.connect(**db_params)  # запускаем один раз
 
 
@@ -50,3 +51,4 @@ def query_change(x):
 
 def close(cur):
     cursor.close()
+