....

src/main/kotlin/network/KisAuthService.kt

@@ -19,7 +19,7 @@ import model.TokenRequest
 import model.TokenResponse
 import java.time.LocalDateTime
 
-class KisAuthService {
+object KisAuthService {
     private val client = HttpClient(CIO) {
         install(ContentNegotiation) {
             json(Json {

src/main/kotlin/network/KisWebSocketManager.kt

@@ -14,7 +14,7 @@ import model.RealTimeTrade
 import util.AesCrypto
 import java.util.concurrent.atomic.AtomicBoolean
 
-class KisWebSocketManager {
+object KisWebSocketManager {
     private val client = HttpClient {
         install(WebSockets) {
             pingInterval = 20_000 // 20초마다 표준 웹소켓 핑 전송 (서버-클라이언트 연결 유지 도움)
@@ -23,7 +23,7 @@ class KisWebSocketManager {
     private var session: DefaultClientWebSocketSession? = null
     private val isConnected = AtomicBoolean(false)
     private val scope = CoroutineScope(Dispatchers.IO + SupervisorJob())
-
+    private var connectJob: Job? = null
     // 콜백 리스너
     var onPriceUpdate: ((RealTimeTrade) -> Unit)? = null
 
@@ -32,8 +32,8 @@ class KisWebSocketManager {
     suspend fun connect() {
         if (isConnected.get()) return
         val url = if (KisSession.config.isSimulation) "ops.koreainvestment.com:31000" else "ops.koreainvestment.com:21000"
-
-        scope.launch {
+        connectJob?.cancelAndJoin()
+        connectJob = scope.launch {
             while (isActive) { // 재연결을 위한 루프 추가
                 try {
                     client.webSocket(method = HttpMethod.Get, host = url.split(":")[0], port = url.split(":")[1].toInt(), path = "/last_price") {
@@ -192,4 +192,14 @@ class KisWebSocketManager {
         activeSubscriptions.addAll(requiredCodes)
     }
 
+    suspend fun disconnect() {
+        println("🔌 웹소켓 연결 종료 중...")
+        isConnected.set(false)
+        connectJob?.cancelAndJoin() // 루프 자체를 중단
+        session?.close()
+        session = null
+        connectJob = null
+        println("🛑 웹소켓 완전 종료")
+    }
+
 }