fix(RNSCommission): allow send 0

src/RNSCommission.sol

@@ -67,7 +67,7 @@ contract RNSCommission is Initializable, AccessControlEnumerable, INSCommission
    * @dev Helper method to allocate commission and take fee into recipient address.
    */
   function _allocateCommissionAndTransferToRecipient(uint256 ronAmount) internal {
-    if (ronAmount == 0) revert InvalidAmountOfRON();
+    if (ronAmount == 0) return;
 
     uint256 length = _commissionInfos.length;
     if (length == 0) revert InvalidArrayLength();

test/RNSCommission/RNSCommission._allocateCommissionAndTransferToRecipient.t.sol

@@ -71,12 +71,16 @@ contract RNSCommisson__allocateCommissionAndTransferToRecipient_Test is RNSCommi
     assertEq(random.balance, 0);
   }
 
-  function test_RevertWhen_RonAmount_is_zero() external {
+  function testConcrete_Success_When_RonAmount_is_zero() external {
     vm.deal(_senders[0], 1e18);
 
     bool sent;
-    vm.expectRevert(INSCommission.InvalidAmountOfRON.selector);
     vm.prank(_senders[0]);
     (sent,) = address(_rnsCommission).call{ value: 0 }(new bytes(0));
+
+    assertEq(_skyMavisTreasuryAddr.balance, 0);
+    assertEq(_roninNetworkTreasuryAddr.balance, 0);
+    assertEq(address(_rnsCommission).balance, 0);
+    assertEq(_senders[0].balance, 1e18);
   }
 }