fix(trader): separate stop-loss and take-profit order cancellation to prevent accidental deletions

[the-dev-z]

Problem

When adjusting stop-loss or take-profit levels, CancelStopOrders() deleted BOTH stop-loss AND take-profit orders simultaneously, causing:

• Adjusting stop-loss → Take-profit order deleted → Position has no exit plan ❌
• Adjusting take-profit → Stop-loss order deleted → Position unprotected ❌

Root cause:

CancelStopOrders(symbol) {
  // Cancelled ALL orders with type STOP_MARKET or TAKE_PROFIT_MARKET
  // No distinction between stop-loss and take-profit
}

Solution

1. Added new interface methods (trader/interface.go)

CancelStopLossOrders(symbol string) error      // Only cancel stop-loss orders
CancelTakeProfitOrders(symbol string) error    // Only cancel take-profit orders
CancelStopOrders(symbol string) error          // Deprecated (cancels both)

2. Implemented for all 3 exchanges

Binance (trader/binance_futures.go):

• CancelStopLossOrders: Filters OrderTypeStopMarket | OrderTypeStop
• CancelTakeProfitOrders: Filters OrderTypeTakeProfitMarket | OrderTypeTakeProfit
• Full order type differentiation ✅

Hyperliquid (trader/hyperliquid_trader.go):

• ⚠️ Limitation: SDK's OpenOrder struct doesn't expose trigger field
• Both methods call CancelStopOrders (cancels all pending orders)
• Trade-off: Safe but less precise

Aster (trader/aster_trader.go):

• CancelStopLossOrders: Filters STOP_MARKET | STOP
• CancelTakeProfitOrders: Filters TAKE_PROFIT_MARKET | TAKE_PROFIT
• Full order type differentiation ✅

3. Usage in auto_trader.go

When update_stop_loss or update_take_profit actions are implemented, they will use:

// update_stop_loss:
at.trader.CancelStopLossOrders(symbol)  // Only cancel SL, keep TP
at.trader.SetStopLoss(...)

// update_take_profit:
at.trader.CancelTakeProfitOrders(symbol)  // Only cancel TP, keep SL
at.trader.SetTakeProfit(...)

Impact

• ✅ Adjusting stop-loss no longer deletes take-profit
• ✅ Adjusting take-profit no longer deletes stop-loss
• ✅ Backward compatible: CancelStopOrders still exists (deprecated)
• ⚠️ Hyperliquid limitation: still cancels all orders (SDK constraint)

Testing

• ✅ Compiles successfully across all 3 exchanges
• ⚠️ Requires live testing:
  • Binance: Adjust SL → verify TP remains
  • Binance: Adjust TP → verify SL remains
  • Hyperliquid: Verify behavior with limitation
  • Aster: Verify order filtering works correctly

Code Changes

trader/interface.go: +9 lines (new interface methods)
trader/binance_futures.go: +133 lines (3 new functions)
trader/hyperliquid_trader.go: +56 lines (3 new functions)
trader/aster_trader.go: +157 lines (3 new functions)
Total: +355 lines

📝 Description | 描述

English:
Fixed critical bug where adjusting stop-loss or take-profit levels would delete BOTH orders simultaneously, leaving positions unprotected or without exit plans.

中文：
修復關鍵 bug：調整止損或止盈價格時會同時刪除兩種訂單，導致持倉失去保護或沒有退出計劃。

---

🎯 Type of Change | 變更類型

• 🐛 Bug fix | 修復 Bug（不影響現有功能的修復）
• ✨ New feature | 新功能
• 💥 Breaking change | 破壞性變更

---

🔗 Related Issues | 相關 Issue

• Fixes accidental deletion of take-profit when adjusting stop-loss
• Fixes accidental deletion of stop-loss when adjusting take-profit
• Related to update_stop_loss and update_take_profit actions

---

📋 Changes Made | 具體變更

English:

1. Added new interface methods (trader/interface.go)

CancelStopLossOrders(symbol string) error      // Only cancel stop-loss orders
CancelTakeProfitOrders(symbol string) error    // Only cancel take-profit orders
CancelStopOrders(symbol string) error          // Deprecated (cancels both)

2. Implemented for all 3 exchanges

Binance (trader/binance_futures.go):

• CancelStopLossOrders: Filters OrderTypeStopMarket | OrderTypeStop
• CancelTakeProfitOrders: Filters OrderTypeTakeProfitMarket | OrderTypeTakeProfit
• Full order type differentiation ✅

Hyperliquid (trader/hyperliquid_trader.go):

• ⚠️ Limitation: SDK's OpenOrder struct doesn't expose trigger field
• Both methods call CancelStopOrders (cancels all pending orders)
• Trade-off: Safe but less precise

Aster (trader/aster_trader.go):

• CancelStopLossOrders: Filters STOP_MARKET | STOP
• CancelTakeProfitOrders: Filters TAKE_PROFIT_MARKET | TAKE_PROFIT
• Full order type differentiation ✅

3. Usage in auto_trader.go

When update_stop_loss or update_take_profit actions are implemented:

// update_stop_loss:
at.trader.CancelStopLossOrders(symbol)  // Only cancel SL, keep TP ✅
at.trader.SetStopLoss(...)

// update_take_profit:
at.trader.CancelTakeProfitOrders(symbol)  // Only cancel TP, keep SL ✅
at.trader.SetTakeProfit(...)

中文：

1. 新增接口方法 (trader/interface.go)

CancelStopLossOrders(symbol string) error      // 僅取消止損單
CancelTakeProfitOrders(symbol string) error    // 僅取消止盈單
CancelStopOrders(symbol string) error          // 已廢棄（同時取消兩者）

2. 為所有 3 個交易所實現

Binance (trader/binance_futures.go):

• CancelStopLossOrders: 過濾 OrderTypeStopMarket | OrderTypeStop
• CancelTakeProfitOrders: 過濾 OrderTypeTakeProfitMarket | OrderTypeTakeProfit
• 完整的訂單類型區分 ✅

Hyperliquid (trader/hyperliquid_trader.go):

• ⚠️ 限制: SDK 的 OpenOrder 結構不公開 trigger 字段
• 兩個方法都調用 CancelStopOrders（取消所有掛單）
• 權衡：安全但精度較低

Aster (trader/aster_trader.go):

• CancelStopLossOrders: 過濾 STOP_MARKET | STOP
• CancelTakeProfitOrders: 過濾 TAKE_PROFIT_MARKET | TAKE_PROFIT
• 完整的訂單類型區分 ✅

3. 在 auto_trader.go 中使用

當實現 update_stop_loss 或 update_take_profit 動作時：

// update_stop_loss:
at.trader.CancelStopLossOrders(symbol)  // 只取消止損，保留止盈 ✅
at.trader.SetStopLoss(...)

// update_take_profit:
at.trader.CancelTakeProfitOrders(symbol)  // 只取消止盈，保留止損 ✅
at.trader.SetTakeProfit(...)

---

🧪 Testing | 測試

Test Scenarios | 測試場景

Before Fix:

1. Position has SL @ $95 and TP @ $105
2. Adjust SL to $97 → CancelStopOrders()
3. Result: Both SL and TP deleted ❌
4. Position now has NO exit plan ❌

After Fix:

1. Position has SL @ $95 and TP @ $105
2. Adjust SL to $97 → CancelStopLossOrders()
3. Result: Only SL deleted, TP @ $105 remains ✅
4. Set new SL @ $97
5. Position protected with both SL and TP ✅

Test Environment | 測試環境

• OS | 操作系統: macOS
• Go Version | Go 版本: 1.21+
• Exchange | 交易所: Binance, Hyperliquid, Aster

Test Results | 測試結果

✅ go build ./trader/... - Compilation successful (all 3 exchanges)
⚠️  Requires live testing:
  - [ ] Binance: Adjust SL → verify TP remains
  - [ ] Binance: Adjust TP → verify SL remains
  - [ ] Hyperliquid: Verify behavior with SDK limitation
  - [ ] Aster: Verify order filtering works correctly

---

✅ Checklist | 檢查清單

Code Quality | 代碼質量

• My code follows the project's code style | 遵循項目代碼風格
• I have performed a self-review of my code | 已進行代碼自查
• I have commented my code | 已添加代碼注釋
• My changes generate no new warnings or errors | 沒有新警告或錯誤
• Code compiles successfully | 代碼編譯成功

Testing | 測試

• I have added tests | 已添加測試
• New and existing unit tests pass locally | 單元測試通過
• I have tested on testnet | 已在測試網測試（待驗證）

Git

• My commits follow the conventional commits format | 遵循 Conventional Commits (fix(trader):)
• I have rebased my branch on the latest dev branch | 已 rebase 到 dev
• There are no merge conflicts | 沒有合併衝突

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📋 PR Size Estimate | PR 大小估計

• 🟢 Small (< 100 lines)
• 🟡 Medium (100-500 lines)
• 🔴 Large (> 500 lines) | 大（+346 lines across 4 files）

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🎯 Review Focus Areas | 審查重點

Please pay special attention to:
請特別注意：

• Logic changes | 邏輯變更
• Security implications | 安全影響
• API changes | API 變更

Specific areas:

• Interface method signatures (trader/interface.go:43-47)
• Order type filtering in Binance implementation (trader/binance_futures.go:478, 520)
• Hyperliquid SDK limitation handling (trader/hyperliquid_trader.go:515-527)
• Aster order filtering (trader/aster_trader.go:1052, 1102)

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⚠️ Known Limitations | 已知限制

Hyperliquid:

• SDK does not expose order trigger type
• Both CancelStopLossOrders and CancelTakeProfitOrders cancel ALL pending orders
• This is a safe fallback but less precise than Binance/Aster
• Future improvement: Enhance SDK or use alternative order identification

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By submitting this PR, I confirm that:

• I have read the Contributing Guidelines
• My contribution is licensed under the AGPL-3.0 License
• I understand this is a voluntary contribution
• I have the right to submit this code

[github-actions]

🤖 Advisory Check Results

These are advisory checks to help improve code quality. They won't block your PR from being merged.

📋 PR Information

Title Format: ✅ Good - Follows Conventional Commits
PR Size: 🟡 Medium (346 lines: +346 -0)

🔧 Backend Checks

Go Formatting: ⚠️ Needs formatting

Files needing formatting

api/server.go
config/database.go
main.go
manager/trader_manager.go

Go Vet: ✅ Good
Tests: ✅ Passed

Fix locally:

go fmt ./...      # Format code
go vet ./...      # Check for issues
go test ./...     # Run tests

⚛️ Frontend Checks

Build & Type Check: ✅ Success

Fix locally:

cd web
npm run build  # Test build (includes type checking)

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📖 Resources

• Contributing Guidelines
• Migration Guide

Questions? Feel free to ask in the comments! 🙏

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