스킬 정리 및 리팩토링

app/api/kis/domestic/balance/route.ts

@@ -3,6 +3,11 @@ import type { DashboardBalanceResponse } from "@/features/dashboard/types/dashbo
 import { hasKisConfig, normalizeTradingEnv } from "@/lib/kis/config";
 import { getDomesticDashboardBalance } from "@/lib/kis/dashboard";
 import { hasKisApiSession } from "@/app/api/kis/_session";
+import {
+  createKisApiErrorResponse,
+  KIS_API_ERROR_CODE,
+  toKisApiErrorMessage,
+} from "@/app/api/kis/_response";
 import {
   readKisAccountParts,
   readKisCredentialsFromHeaders,
@@ -21,29 +26,31 @@ import {
 export async function GET(request: Request) {
   const hasSession = await hasKisApiSession();
   if (!hasSession) {
-    return NextResponse.json({ error: "로그인이 필요합니다." }, { status: 401 });
+    return createKisApiErrorResponse({
+      status: 401,
+      code: KIS_API_ERROR_CODE.AUTH_REQUIRED,
+      message: "로그인이 필요합니다.",
+    });
   }
 
   const credentials = readKisCredentialsFromHeaders(request.headers);
 
   if (!hasKisConfig(credentials)) {
-    return NextResponse.json(
-      {
-        error: "KIS API 키 설정이 필요합니다.",
-      },
-      { status: 400 },
-    );
+    return createKisApiErrorResponse({
+      status: 400,
+      code: KIS_API_ERROR_CODE.CREDENTIAL_REQUIRED,
+      message: "KIS API 키 설정이 필요합니다.",
+    });
   }
 
   const account = readKisAccountParts(request.headers);
   if (!account) {
-    return NextResponse.json(
-      {
-        error:
-          "계좌번호가 필요합니다. 설정에서 계좌번호(예: 12345678-01)를 입력해 주세요.",
-      },
-      { status: 400 },
-    );
+    return createKisApiErrorResponse({
+      status: 400,
+      code: KIS_API_ERROR_CODE.ACCOUNT_REQUIRED,
+      message:
+        "계좌번호가 필요합니다. 설정에서 계좌번호(예: 12345678-01)를 입력해 주세요.",
+    });
   }
 
   try {
@@ -62,10 +69,10 @@ export async function GET(request: Request) {
       },
     });
   } catch (error) {
-    const message =
-      error instanceof Error
-        ? error.message
-        : "잔고 조회 중 오류가 발생했습니다.";
-    return NextResponse.json({ error: message }, { status: 500 });
+    return createKisApiErrorResponse({
+      status: 500,
+      code: KIS_API_ERROR_CODE.UPSTREAM_FAILURE,
+      message: toKisApiErrorMessage(error, "잔고 조회 중 오류가 발생했습니다."),
+    });
   }
 }