fix: 修复总费用被重置的bug

src/models/redis.js

@@ -714,7 +714,7 @@ class RedisClient {
     const dailyKey = `usage:cost:daily:${keyId}:${today}`
     const monthlyKey = `usage:cost:monthly:${keyId}:${currentMonth}`
     const hourlyKey = `usage:cost:hourly:${keyId}:${currentHour}`
-    const totalKey = `usage:cost:total:${keyId}`
+    const totalKey = `usage:cost:total:${keyId}` // 总费用键 - 永不过期，持续累加
 
     logger.debug(
       `💰 Incrementing cost for ${keyId}, amount: $${amount}, date: ${today}, dailyKey: ${dailyKey}`
@@ -724,8 +724,8 @@ class RedisClient {
       this.client.incrbyfloat(dailyKey, amount),
       this.client.incrbyfloat(monthlyKey, amount),
       this.client.incrbyfloat(hourlyKey, amount),
-      this.client.incrbyfloat(totalKey, amount),
-      // 设置过期时间
+      this.client.incrbyfloat(totalKey, amount), // ✅ 累加到总费用（永不过期）
+      // 设置过期时间（注意：totalKey 不设置过期时间，保持永久累计）
       this.client.expire(dailyKey, 86400 * 30), // 30天
       this.client.expire(monthlyKey, 86400 * 90), // 90天
       this.client.expire(hourlyKey, 86400 * 7) // 7天

src/services/costInitService.js

@@ -133,10 +133,34 @@ class CostInitService {
       totalCost += cost
     }
 
-    // 写入总费用
+    // 写入总费用 - 修复：只在总费用不存在时初始化，避免覆盖现有累计值
     if (totalCost > 0) {
       const totalKey = `usage:cost:total:${apiKeyId}`
-      promises.push(client.set(totalKey, totalCost.toString()))
+      // 先检查总费用是否已存在
+      const existingTotal = await client.get(totalKey)
+
+      if (!existingTotal || parseFloat(existingTotal) === 0) {
+        // 仅在总费用不存在或为0时才初始化
+        promises.push(client.set(totalKey, totalCost.toString()))
+        logger.info(`💰 Initialized total cost for API Key ${apiKeyId}: $${totalCost.toFixed(6)}`)
+      } else {
+        // 如果总费用已存在，保持不变，避免覆盖累计值
+        // 注意：这个逻辑防止因每日费用键过期（30天）导致的错误覆盖
+        // 如果需要强制重新计算，请先手动删除 usage:cost:total:{keyId} 键
+        const existing = parseFloat(existingTotal)
+        const calculated = totalCost
+
+        if (calculated > existing * 1.1) {
+          // 如果计算值比现有值大 10% 以上，记录警告（可能是数据不一致）
+          logger.warn(
+            `💰 Total cost mismatch for API Key ${apiKeyId}: existing=$${existing.toFixed(6)}, calculated=$${calculated.toFixed(6)} (from last 30 days). Keeping existing value to prevent data loss.`
+          )
+        } else {
+          logger.debug(
+            `💰 Skipping total cost initialization for API Key ${apiKeyId} - existing: $${existing.toFixed(6)}, calculated: $${calculated.toFixed(6)}`
+          )
+        }
+      }
     }
 
     await Promise.all(promises)