diff --git a/.swiftlint.yml b/.swiftlint.yml
new file mode 100644
index 0000000..b14c36b
--- /dev/null
+++ b/.swiftlint.yml
@@ -0,0 +1,2 @@
+identifier_name:
+    min_length: 1
diff --git a/Package.resolved b/Package.resolved
index 69bae57..bc92c75 100644
--- a/Package.resolved
+++ b/Package.resolved
@@ -1,5 +1,5 @@
 {
-  "originHash" : "5b140fcd6a36165fb4c1302609ef5353bacb59ce0f82996aa0cf66ee021cbb17",
+  "originHash" : "3b48af7783bd7fc90049cfb326f7fac3c85fa65bc3afc5b3c1e0444e5e3fe3ac",
   "pins" : [
     {
       "identity" : "async-http-client",
@@ -28,6 +28,15 @@
         "version" : "4.15.0"
       }
     },
+    {
+      "identity" : "grdb.swift",
+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/groue/GRDB.swift.git",
+      "state" : {
+        "revision" : "2cf6c756e1e5ef6901ebae16576a7e4e4b834622",
+        "version" : "6.29.3"
+      }
+    },
     {
       "identity" : "multipart-kit",
       "kind" : "remoteSourceControl",
diff --git a/Package.swift b/Package.swift
index 7cc2feb..8afa7b0 100644
--- a/Package.swift
+++ b/Package.swift
@@ -4,16 +4,19 @@
 import PackageDescription
 
 var packageDependencies: [Package.Dependency] = [
-    .package(url: "https://github.com/vapor/vapor.git", .upToNextMajor(from: "4.57.0"))
+    .package(url: "https://github.com/nerzh/swift-telegram-sdk", .upToNextMajor(from: "3.0.3")),
+    .package(url: "https://github.com/vapor/vapor.git", .upToNextMajor(from: "4.57.0")),
+    .package(url: "https://github.com/apple/swift-crypto.git", .upToNextMajor(from: "3.0.0")),
+    .package(url: "https://github.com/groue/GRDB.swift.git", .upToNextMajor(from: "6.0.0"))
 ]
 
 var targetDependencies: [PackageDescription.Target.Dependency] = [
-    .product(name: "Vapor", package: "vapor")
+    .product(name: "Vapor", package: "vapor"),
+    .product(name: "SwiftTelegramSdk", package: "swift-telegram-sdk"),
+    .product(name: "Crypto", package: "swift-crypto"),
+    .product(name: "GRDB", package: "GRDB.swift")
 ]
 
-packageDependencies.append(.package(url: "https://github.com/nerzh/swift-telegram-sdk", .upToNextMajor(from: "3.0.3")))
-targetDependencies.append(.product(name: "SwiftTelegramSdk", package: "swift-telegram-sdk"))
-
 let package = Package(
     name: "TelegramModeratorBot",
     dependencies: packageDependencies,
diff --git a/Sources/TelegramModeratorBot/Database.swift b/Sources/TelegramModeratorBot/Database.swift
new file mode 100644
index 0000000..d23fa47
--- /dev/null
+++ b/Sources/TelegramModeratorBot/Database.swift
@@ -0,0 +1,53 @@
+import GRDB
+
+struct User: Codable, FetchableRecord, PersistableRecord {
+    var userId: String
+    var publicKey: String
+    var isSpammer: Bool
+}
+
+final class Database: Sendable {
+
+    private var dbWriter: any DatabaseWriter
+
+     init(_ dbWriter: any GRDB.DatabaseWriter) throws {
+        self.dbWriter = dbWriter
+        try migrator.migrate(dbWriter)
+    }
+
+    let dbQueue = try DatabaseQueue(path: "./db.sqlite")
+
+    let db = try Connection("./db.sqlite")
+
+#if DEBUG
+        // Speed up development by nuking the database when migrations change
+        // See <https://swiftpackageindex.com/groue/grdb.swift/documentation/grdb/migrations#The-eraseDatabaseOnSchemaChange-Option>
+        migrator.eraseDatabaseOnSchemaChange = true
+#endif
+  private var migrator: DatabaseMigrator {
+    var migrator = DatabaseMigrator()
+    migrator.registerMigration("v1") { db in
+        try db.create(table: "users", { t in
+        t.primaryKey("userId", .text).NotNull()
+        t.column("publicKey", .text).NotNull()
+        t.column("isSpammer", .bool)
+    })
+    return migrator
+    }
+    }
+}
+
+extension Database {
+     static func makeConfiguration(_ base: Configuration = Configuration()) -> Configuration {
+        var config = base
+        return config
+    }
+}
+
+extension Database {
+    func saveUser(_ userId: String, _ publicKey: String, _ isSpammer: Bool) throws {
+        try dbWriter.write { db in
+            try User.init(userId: userId, publicKey: publicKey, isSpammer: isSpammer).insert(db)
+        }
+    }
+}
diff --git a/Sources/TelegramModeratorBot/DefaultBotHandlers.swift b/Sources/TelegramModeratorBot/DefaultBotHandlers.swift
index f2b359e..3e28477 100644
--- a/Sources/TelegramModeratorBot/DefaultBotHandlers.swift
+++ b/Sources/TelegramModeratorBot/DefaultBotHandlers.swift
@@ -1,18 +1,42 @@
 import Vapor
+import Crypto
 @preconcurrency import SwiftTelegramSdk
 
 final class DefaultBotHandlers {
-   static func addHandlers() async {
-        await defaultBaseHandler()
+   static func addHandlers(_ bot: TGBot) async {
+        await defaultBaseHandler(bot)
    }
 
-   private static func defaultBaseHandler() async {
+   private static func defaultBaseHandler(_ bot: TGBot) async {
        await botActor.bot.dispatcher.add(TGBaseHandler({ update in
             guard let message = update.message else { return }
             let params: TGSendMessageParams = .init(chatId: .chat(message.chat.id), text: """
        Help message
        """)
-       try await botActor.bot.sendMessage(params: params)
+       try await bot.sendMessage(params: params)
       }))
    }
+
+   private static func sendButtonOfAuth(_ bot: TGBot) async throws {
+        await bot.dispatcher.add(TGCallbackQueryHandler(pattern: "Subscribe", { update in
+            bot.log.info("press")
+            let userId = update.callbackQuery!.from.id
+
+            let arrayBytesOfId = withUnsafeBytes(of: userId, Array.init)
+            let hashedUserIdDigest = SHA512.hash(Data(arrayBytesOfId))
+            // Convert Digest to hex string
+            let hashedUserId = Data(hashedUserIdDigest).map { String(format: "%02x", $0) }.joined()
+
+            try? Database.saveUser(hashedUserId, "", false)
+
+            let params: TGAnswerCallbackQueryParams = .init(
+                callbackQueryId: update.callbackQuery?.id ?? "0",
+                text: update.callbackQuery?.data ?? "data not exit",
+                showAlert: nil,
+                url: nil,
+                cacheTime: nil
+            )
+            try await bot.answerCallbackQuery(params: params)
+        }))
+   }
 }
diff --git a/Sources/TelegramModeratorBot/configure.swift b/Sources/TelegramModeratorBot/configure.swift
index cf13f47..ceeed09 100644
--- a/Sources/TelegramModeratorBot/configure.swift
+++ b/Sources/TelegramModeratorBot/configure.swift
@@ -3,7 +3,9 @@ import Vapor
 @preconcurrency import SwiftTelegramSdk
 
 public func configure(_ app: Application) async throws {
-  guard let tgApi: String = Environment.get("TG_BOT_API") else { throw Errors.notVariable("Telegram key is not defined")}
+  guard let tgApi: String = Environment.get("TG_BOT_API") else {
+      throw Errors.notVariable("Telegram key is not defined")
+  }
   app.logger.logLevel = .debug
   let bot: TGBot = try await .init(connectionType: .longpolling(limit: nil,
                                                                   timeout: nil,
@@ -14,7 +16,7 @@ public func configure(_ app: Application) async throws {
                                      botId: tgApi,
                                      log: app.logger)
     await botActor.setBot(bot)
-    await DefaultBotHandlers.addHandlers()
+    await DefaultBotHandlers.addHandlers(bot)
     try await botActor.bot.start()
  //   try routes(app)
 }
diff --git a/Sources/TelegramModeratorBot/errors.swift b/Sources/TelegramModeratorBot/errors.swift
index 74146bd..2224b17 100644
--- a/Sources/TelegramModeratorBot/errors.swift
+++ b/Sources/TelegramModeratorBot/errors.swift
@@ -1,3 +1,4 @@
 enum Errors: Error {
     case notVariable(String)
+    case `default`(String)
 }