From 2c8029006a8c9ab267f88ee21591bc546c4afedd Mon Sep 17 00:00:00 2001
From: Administrator <15274802129@163.com>
Date: Sat, 06 Jun 2026 11:27:50 +0800
Subject: [PATCH] feat(gateApi): 添加最大持仓限制和止盈机制

---
 src/main/java/com/xcong/excoin/modules/gateApi/GateGridTradeService.java |   84 ++++++++++++++++++++++++++++++++++++++++--
 1 files changed, 80 insertions(+), 4 deletions(-)

diff --git a/src/main/java/com/xcong/excoin/modules/gateApi/GateGridTradeService.java b/src/main/java/com/xcong/excoin/modules/gateApi/GateGridTradeService.java
index 98f7a0c..352f61d 100644
--- a/src/main/java/com/xcong/excoin/modules/gateApi/GateGridTradeService.java
+++ b/src/main/java/com/xcong/excoin/modules/gateApi/GateGridTradeService.java
@@ -793,6 +793,7 @@
                 shortEntryQty = 1;
                 extendShortStopLoss(filledQty);
                 log.info("[Gate] 空单成交 gridId:{}, qty:{}, 追挂止损", shortGridElement.getId(), filledQty);
+                checkMaxPositionAndPlaceTakeProfit(false, shortGridElement.getId());
             }
         }
         GridElement longGridElement = GridElement.findByLongOrderId(orderId);
@@ -803,6 +804,7 @@
                 longEntryQty = 1;
                 extendLongStopLoss(filledQty);
                 log.info("[Gate] 多单成交 gridId:{}, qty:{}, 追挂止损", longGridElement.getId(), filledQty);
+                checkMaxPositionAndPlaceTakeProfit(true, longGridElement.getId());
             }
         }
     }
@@ -1516,17 +1518,91 @@
         }
     }
 
+    /**
+     * 通过 REST API 查询实时持仓,超限则在下一网格挂止盈单。
+     * 使用异步执行避免阻塞 WS 回调线程。
+     *
+     * @param isLong 是否为多仓方向
+     * @param gridId 当前挂单成交的网格 ID
+     */
+    private void checkMaxPositionAndPlaceTakeProfit(boolean isLong, int gridId) {
+        int maxPos = config.getMaxPositionSize();
+        if (maxPos <= 0) return;
+
+        executor.submitTask(() -> {
+            try {
+                List<Position> positions = futuresApi.listPositions(SETTLE).execute();
+                if (positions == null) return;
+
+                long actualPosSize = 0;
+                String targetMode = isLong ? "dual_long" : "dual_short";
+                for (Position pos : positions) {
+                    if (!config.getContract().equals(pos.getContract())) continue;
+                    Position.ModeEnum mode = pos.getMode();
+                    if (mode != null && mode.getValue() != null && targetMode.equals(mode.getValue())) {
+                        actualPosSize = Math.abs(Long.parseLong(pos.getSize()));
+                        break;
+                    }
+                }
+
+                if (actualPosSize <= maxPos) {
+                    log.debug("[Gate] 持仓检查 {}方向 实际持仓:{} ≤ 上限:{}, 无需止盈", targetMode, actualPosSize, maxPos);
+                    return;
+                }
+
+                // 下一网格 ID:空仓 N→N-1(向基底方向,更低价),多仓 -N→-(N-1)(向基底方向,更高价)
+                int nextGridId = isLong ? -(Math.abs(gridId) - 1) : gridId - 1;
+                GridElement nextGrid = GridElement.findById(nextGridId);
+                if (nextGrid == null) {
+                    log.warn("[Gate] 持仓超限 but 下一网格{}不存在", nextGridId);
+                    return;
+                }
+
+                BigDecimal tpPrice = nextGrid.getGridPrice();
+                if (isLong) {
+                    executor.placeTakeProfit(tpPrice,
+                            FuturesPriceTrigger.RuleEnum.NUMBER_1,
+                            ORDER_TYPE_CLOSE_LONG,
+                            negate(config.getQuantity()),
+                            profitId -> log.info("[Gate] 多仓超限止盈已挂(持仓:{})>, gridId:{}, tpPrice:{}, id:{}",
+                                    actualPosSize, nextGridId, tpPrice, profitId));
+                } else {
+                    executor.placeTakeProfit(tpPrice,
+                            FuturesPriceTrigger.RuleEnum.NUMBER_2,
+                            ORDER_TYPE_CLOSE_SHORT,
+                            config.getQuantity(),
+                            profitId -> log.info("[Gate] 空仓超限止盈已挂(持仓:{})>, gridId:{}, tpPrice:{}, id:{}",
+                                    actualPosSize, nextGridId, tpPrice, profitId));
+                }
+            } catch (Exception e) {
+                log.warn("[Gate] 通过API查询持仓超限检查失败", e);
+            }
+        });
+    }
+
+    /** Gate 永续合约 taker 费率 0.05% */
+    private static final BigDecimal TAKER_FEE_RATE = new BigDecimal("0.0005");
+    /** ETH_USDT 合约面值(每张=0.01 ETH) */
+    private static final BigDecimal CT_VAL = new BigDecimal("0.01");
+
     private void checkProfitAndReset() {
         try {
             FuturesAccount account = futuresApi.listFuturesAccounts(SETTLE);
             BigDecimal unrealisedPnl = new BigDecimal(account.getCrossUnrealisedPnl());
             BigDecimal available = new BigDecimal(account.getCrossAvailable());
             BigDecimal totalEquity = unrealisedPnl.add(available);
+
+            // 估算平仓手续费:(多仓张数+空仓张数) × 合约面值 × 当前价 × taker费率
+            BigDecimal closeContractValue = longPositionSize.add(shortPositionSize)
+                    .multiply(CT_VAL).multiply(lastKlinePrice != null ? lastKlinePrice : BigDecimal.ZERO);
+            BigDecimal estimatedFee = closeContractValue.multiply(TAKER_FEE_RATE);
+            BigDecimal netEquity = totalEquity.subtract(estimatedFee);
+
             BigDecimal target = initialPrincipal.add(config.getExpectedProfit());
-            log.info("[Gate] 盈亏检查 cross_unrealised_pnl:{}, cross_available:{}, 合计:{}, 目标:{}",
-                    unrealisedPnl, available, totalEquity, target);
-            if (totalEquity.compareTo(target) > 0) {
-                log.info("[Gate] 盈亏达标({}>{}),重置策略", totalEquity, target);
+            log.info("[Gate] 盈亏检查 upl:{}, avail:{}, 合计:{}, 估手续费:{}, 净权益:{}, 目标:{}",
+                    unrealisedPnl, available, totalEquity, estimatedFee, netEquity, target);
+            if (netEquity.compareTo(target) > 0) {
+                log.info("[Gate] 盈亏达标(净权益{}>目标{}),重置策略", netEquity, target);
                 state = StrategyState.STOPPED;
                 closeExistingPositions();
                 futuresApi.cancelPriceTriggeredOrderList(SETTLE, config.getContract());

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