fix contract

contracts/ytLp/core/YTPoolManager.sol

@@ -71,6 +71,7 @@ contract YTPoolManager is Initializable, UUPSUpgradeable, ReentrancyGuardUpgrade
     event HandlerSet(address indexed handler, bool isActive);
     event GovChanged(address indexed oldGov, address indexed newGov);
     event AumAdjustmentChanged(uint256 addition, uint256 deduction);
+    event CooldownInherited(address indexed from, address indexed to, uint256 cooldownTime);
     
     modifier onlyGov() {
         if (msg.sender != gov) revert Forbidden();
@@ -138,6 +139,24 @@ contract YTPoolManager is Initializable, UUPSUpgradeable, ReentrancyGuardUpgrade
         emit AumAdjustmentChanged(_addition, _deduction);
     }
     
+    /**
+     * @notice LP 代币转账时的回调函数
+     * @param _from 发送方地址
+     * @param _to 接收方地址
+     * @dev 当 LP 代币转账时，接收方继承发送方的冷却时间，防止绕过冷却期
+     */
+    function onLPTransfer(address _from, address _to) external {
+        // 只允许 ytLP 代币合约调用
+        if (msg.sender != ytLP) revert Forbidden();
+        
+        // 如果发送方有冷却时间记录，且接收方的冷却时间更早（或没有记录）
+        // 则将发送方的冷却时间继承给接收方
+        if (lastAddedAt[_from] > 0 && lastAddedAt[_to] < lastAddedAt[_from]) {
+            lastAddedAt[_to] = lastAddedAt[_from];
+            emit CooldownInherited(_from, _to, lastAddedAt[_from]);
+        }
+    }
+    
     /**
      * @notice 为指定账户添加流动性（Handler调用）
      */