From 8e0d990e4f6a4b670d9e06b60f11d3c50f69cd30 Mon Sep 17 00:00:00 2001
From: woohyun kim <whkim@kephas.kr>
Date: Thu, 2 Apr 2026 09:10:02 +0900
Subject: [PATCH] fix: normalize symbol to uppercase before Binance API calls

Binance API rejects lowercase characters in the symbol parameter
(error -1100). Normalize symbol.toUpperCase() at the entry point of
both backtest paths so DB keys and API calls are always uppercase.

Co-Authored-By: Paperclip <noreply@paperclip.ing>
---
 apps/worker-service/src/backtesting/data.service.ts    | 1 +
 apps/worker-service/src/backtests/backtests.service.ts | 1 +
 2 files changed, 2 insertions(+)

diff --git a/apps/worker-service/src/backtesting/data.service.ts b/apps/worker-service/src/backtesting/data.service.ts
index 76d8c94..110f9e4 100644
--- a/apps/worker-service/src/backtesting/data.service.ts
+++ b/apps/worker-service/src/backtesting/data.service.ts
@@ -30,6 +30,7 @@ export class DataService {
     startTime: number,
     endTime: number,
   ): Promise<OhlcvCandle[]> {
+    symbol = symbol.toUpperCase();
     const stored = await this.loadFromDb(exchange, symbol, interval, startTime, endTime);
     if (stored.length > 0) {
       return stored;
diff --git a/apps/worker-service/src/backtests/backtests.service.ts b/apps/worker-service/src/backtests/backtests.service.ts
index 7aa1325..6fa7873 100644
--- a/apps/worker-service/src/backtests/backtests.service.ts
+++ b/apps/worker-service/src/backtests/backtests.service.ts
@@ -222,6 +222,7 @@ export class BacktestsService implements OnModuleInit, OnModuleDestroy {
     startDate: Date,
     endDate: Date,
   ): Promise<Candle[]> {
+    symbol = symbol.toUpperCase();
     const cacheKey = `backtest:candles:${exchange}:${symbol}:${interval}:${startDate.toISOString()}:${endDate.toISOString()}`;
     const cached = await this.redis.get(cacheKey);
     if (cached) {