fix: 修复最大仓位金额未生效和交易receipt解析问题

1. 修复 CopyTradingFilterService 中最大仓位金额(maxPositionValue)未生效的问题
   - 当只配置了最大仓位金额但未配置 maxSpread 或 minOrderDepth 时，
     仓位检查被跳过导致过滤失效
   - 将仓位检查移到 needOrderbook 判断之前，确保始终执行仓位检查

2. 修复 OnChainWsService 中交易 receipt 为 JsonNull 时的空指针问题
   - 添加 JsonNull 检查，防止解析失败时出现异常

backend/src/main/kotlin/com/wrbug/polymarketbot/service/copytrading/configs/CopyTradingFilterService.kt

@@ -71,12 +71,20 @@ class CopyTradingFilterService(
             }
         }
         
-        // 3. 检查是否需要获取订单簿
+        // 3. 检查是否需要获取订单簿或需要执行仓位检查
-        // 只有在配置了需要订单簿的过滤条件时才获取
+        // 只有在配置了需要订单簿的过滤条件时才获取订单簿
         val needOrderbook = copyTrading.maxSpread != null || copyTrading.minOrderDepth != null
         
+        // 3.5. 如果不需要订单簿，则跳过订单簿相关的检查，但仍然需要检查仓位限制
         if (!needOrderbook) {
-            // 不需要订单簿，直接通过
+            // 仓位检查（如果配置了最大仓位限制且提供了跟单金额和市场ID）
+            if (copyOrderAmount != null && marketId != null) {
+                val positionCheck = checkPositionLimits(copyTrading, copyOrderAmount, marketId)
+                if (!positionCheck.isPassed) {
+                    return positionCheck
+                }
+            }
+            // 通过所有检查
             return FilterResult.passed()
         }
         

backend/src/main/kotlin/com/wrbug/polymarketbot/service/copytrading/monitor/OnChainWsService.kt

@@ -1,5 +1,6 @@
 package com.wrbug.polymarketbot.service.copytrading.monitor
 
+import com.google.gson.JsonNull
 import com.wrbug.polymarketbot.api.*
 import com.wrbug.polymarketbot.entity.Leader
 import com.wrbug.polymarketbot.repository.LeaderRepository
@@ -23,12 +24,12 @@ class OnChainWsService(
     private val copyOrderTrackingService: CopyOrderTrackingService,
     private val leaderRepository: LeaderRepository
 ) {
-    
+
     private val logger = LoggerFactory.getLogger(OnChainWsService::class.java)
-    
+
     // 存储需要监听的Leader：leaderId -> Leader
     private val monitoredLeaders = ConcurrentHashMap<Long, Leader>()
-    
+
     /**
      * 启动链上 WebSocket 监听
      * 通过统一服务订阅所有 Leader
@@ -40,14 +41,14 @@ class OnChainWsService(
             stop()
             return
         }
-        
+
         // 更新 Leader 列表
         monitoredLeaders.clear()
         leaders.forEach { leader ->
             addLeader(leader)
         }
     }
-    
+
     /**
      * 添加Leader监听
      * 通过统一服务订阅该 Leader 的地址
@@ -57,17 +58,17 @@ class OnChainWsService(
             logger.warn("Leader ID为空，跳过: ${leader.leaderAddress}")
             return
         }
-        
+
         val leaderId = leader.id!!
-        
+
         // 如果已经在监听列表中，不重复添加
         if (monitoredLeaders.containsKey(leaderId)) {
             logger.debug("Leader 已在监听列表中: ${leader.leaderName} (${leader.leaderAddress})")
             return
         }
-        
+
         monitoredLeaders[leaderId] = leader
-        
+
         // 通过统一服务订阅
         val subscriptionId = "LEADER_$leaderId"
         unifiedOnChainWsService.subscribe(
@@ -79,40 +80,45 @@ class OnChainWsService(
                 handleLeaderTransaction(leaderId, txHash, httpClient, rpcApi)
             }
         )
-        
+
         logger.info("添加 Leader 监听: ${leader.leaderName} (${leader.leaderAddress})")
     }
-    
+
     /**
      * 处理 Leader 的交易
      */
-    private suspend fun handleLeaderTransaction(leaderId: Long, txHash: String, httpClient: OkHttpClient, rpcApi: EthereumRpcApi) {
+    private suspend fun handleLeaderTransaction(
+        leaderId: Long,
+        txHash: String,
+        httpClient: OkHttpClient,
+        rpcApi: EthereumRpcApi
+    ) {
         val leader = monitoredLeaders[leaderId] ?: return
-        
+
         logger.debug("开始处理 Leader 交易: leaderId=$leaderId, txHash=$txHash, leaderAddress=${leader.leaderAddress}")
-        
+
         try {
             // 获取交易 receipt
             val receiptRequest = JsonRpcRequest(
                 method = "eth_getTransactionReceipt",
                 params = listOf(txHash)
             )
-            
+
             val receiptResponse = rpcApi.call(receiptRequest)
             if (!receiptResponse.isSuccessful || receiptResponse.body() == null) {
                 logger.warn("获取交易 receipt 失败: leaderId=$leaderId, txHash=$txHash, code=${receiptResponse.code()}")
                 return
             }
-            
+
             val receiptRpcResponse = receiptResponse.body()!!
-            if (receiptRpcResponse.error != null || receiptRpcResponse.result == null) {
+            if (receiptRpcResponse.error != null || receiptRpcResponse.result == null || receiptRpcResponse.result is JsonNull) {
                 logger.warn("交易 receipt 错误: leaderId=$leaderId, txHash=$txHash, error=${receiptRpcResponse.error}")
                 return
             }
-            
+
             // 使用 Gson 解析 receipt JSON
             val receiptJson = receiptRpcResponse.result.asJsonObject
-            
+
             // 获取区块号和时间戳
             val blockNumber = receiptJson.get("blockNumber")?.asString
             val blockTimestamp = if (blockNumber != null) {
@@ -120,7 +126,7 @@ class OnChainWsService(
             } else {
                 null
             }
-            
+
             // 解析 receipt 中的 Transfer 日志
             val logs = receiptJson.getAsJsonArray("logs") ?: run {
                 logger.warn("交易 receipt 中没有日志: leaderId=$leaderId, txHash=$txHash")
@@ -128,7 +134,7 @@ class OnChainWsService(
             }
             val (erc20Transfers, erc1155Transfers) = OnChainWsUtils.parseReceiptTransfers(logs)
             logger.debug("解析交易日志: leaderId=$leaderId, txHash=$txHash, erc20Transfers=${erc20Transfers.size}, erc1155Transfers=${erc1155Transfers.size}")
-            
+
             // 解析交易信息
             val trade = OnChainWsUtils.parseTradeFromTransfers(
                 txHash = txHash,
@@ -138,7 +144,7 @@ class OnChainWsService(
                 erc1155Transfers = erc1155Transfers,
                 retrofitFactory = retrofitFactory
             )
-            
+
             if (trade != null) {
                 logger.info("成功解析交易: leaderId=$leaderId, txHash=$txHash, side=${trade.side}, market=${trade.market}, size=${trade.size}")
                 // 调用 processTrade 处理交易
@@ -154,21 +160,21 @@ class OnChainWsService(
             logger.error("处理 Leader 交易失败: leaderId=$leaderId, txHash=$txHash, ${e.message}", e)
         }
     }
-    
+
     /**
      * 移除Leader监听
      * 取消该 Leader 的订阅
      */
     fun removeLeader(leaderId: Long) {
         monitoredLeaders.remove(leaderId)
-        
+
         // 通过统一服务取消订阅
         val subscriptionId = "LEADER_$leaderId"
         unifiedOnChainWsService.unsubscribe(subscriptionId)
-        
+
         logger.info("移除 Leader 监听: leaderId=$leaderId")
     }
-    
+
     /**
      * 停止监听
      */
@@ -180,7 +186,7 @@ class OnChainWsService(
         }
         monitoredLeaders.clear()
     }
-    
+
     @PreDestroy
     fun destroy() {
         stop()