updates L2Reward.createPosition to resolve reentrancy warnings

src/L2/L2Reward.sol

@@ -172,21 +172,22 @@ contract L2Reward is Initializable, Ownable2StepUpgradeable, UUPSUpgradeable, IS
     function createPosition(uint256 amount, uint256 duration) public virtual returns (uint256) {
         updateGlobalState();
 
-        // create a new position
-        // slither-disable-next-line unchecked-transfer
-        IL2LiskToken(l2TokenContract).transferFrom(msg.sender, address(this), amount);
-        // slither-disable-next-line unused-return
-        IL2LiskToken(l2TokenContract).approve(stakingContract, amount);
-        uint256 id = IL2Staking(stakingContract).lockAmount(msg.sender, amount, duration);
         uint256 today = todayDay();
-        lastClaimDate[id] = today;
 
         // update total weight and amount
         totalWeight += amount * (duration + OFFSET);
         totalAmountLocked += amount;
         dailyUnlockedAmounts[today + duration] += amount;
         pendingUnlockAmount += amount;
 
+        // create a new position
+        // slither-disable-next-line unchecked-transfer
+        IL2LiskToken(l2TokenContract).transferFrom(msg.sender, address(this), amount);
+        // slither-disable-next-line unused-return
+        IL2LiskToken(l2TokenContract).approve(stakingContract, amount);
+        uint256 id = IL2Staking(stakingContract).lockAmount(msg.sender, amount, duration);
+        lastClaimDate[id] = today;
+
         emit LockingPositionCreated(id);
 
         return id;
@@ -213,7 +214,6 @@ contract L2Reward is Initializable, Ownable2StepUpgradeable, UUPSUpgradeable, IS
         // claim rewards and updates staking contract
         _claimReward(lockID);
         IL2Staking(stakingContract).unlock(lockID);
-
         delete lastClaimDate[lockID];
 
         emit LockingPositionDeleted(lockID);