수정사항 반영

backend/app/services/korea_investment_api.py

@@ -773,7 +773,39 @@ class KoreaInvestmentAPI:
         except Exception as e:
             logger.error(f"Error fetching balance: {e}")
             raise
-    
+
+    async def get_overseas_balance(self) -> Dict[str, Any]:
+        """해외주식 잔고 조회 (미국 기준)
+
+        실전: TTTS3012R / 모의: VTTS3012R
+        응답 output1: 보유 종목 목록 (ovrs_pdno, ovrs_item_name, ovrs_excg_cd, ord_psbl_qty, pchs_avg_pric, now_pric2, evlu_pfls_amt, evlu_pfls_rt2)
+        응답 output2: 계좌 요약 (tot_evlu_amt, frcr_evlu_tota, usd_amt, ovrs_tot_pfls)
+        """
+        try:
+            account_number_prefix = self.account_number[:8]
+            account_number_suffix = self.account_number[8:]
+
+            is_virtual = "vts" in self.base_url.lower()
+            tr_id = "VTTS3012R" if is_virtual else "TTTS3012R"
+
+            result, _ = await self._make_request(
+                "GET",
+                "/uapi/overseas-stock/v1/trading/inquire-balance",
+                tr_id,
+                params={
+                    "CANO": account_number_prefix,
+                    "ACNT_PRDT_CD": account_number_suffix,
+                    "OVRS_EXCG_CD": "NASD",   # 미국 전체 (NASD 조회 시 NYSE·AMEX 포함)
+                    "TR_CRCY_CD": "USD",
+                    "CTX_AREA_FK200": "",
+                    "CTX_AREA_NK200": "",
+                }
+            )
+            return result
+        except Exception as e:
+            logger.error(f"Error fetching overseas balance: {e}")
+            return {}
+
     async def place_order(
         self,
         stock_code: str,