better comments

contracts/ChainIdManager.sol

@@ -1,11 +1,19 @@
 // SPDX-License-Identifier: GPL-3.0-only
 pragma solidity ^0.8.20;
 
+// The ChainIdManager contract provides a list of new usable chainIds via the getNextUsableChainId function.
+// If a project uses one chainId, it can be added to the deny list and then no other project will use it.
+// The contract does not come with an owner, but anyone can add chainIds to the deny list.
+// It costs just gasBurnAmount to deny list a chainId.
+// The burnGas function introduces this cost to use up chainIds.
+// There are uint64(2**63=9.223372e+18) chainIds minus the publicly used chainIds available.
+// Using all of the chainIds would cost 9.223372e+18 * gasBurnAmount = 9.223372e+24 gas = 6.1489147e+17 blocks = 237226647377 years
+
 contract ChainIdManager {
     // Counter for the number of Chain IDs
     uint64 public chainIdCounter = 0;
     // contains a list of denied Chain IDs that should not be used as chainIds
-    // they are governed by a owner of the contract
+    // they are anyone who is willing to pay the gas to use them.
     mapping(uint64 => bool) public deniedChainIds;
     // Fee to use up a chain ID
     uint256 public immutable gasBurnAmount = 1000000;
@@ -27,7 +35,7 @@ contract ChainIdManager {
      * @dev Adds multiple Chain IDs to the deny list
      * @param chainIds The Chain IDs to add
      */
-    function denyListChainIds(uint64[] memory chainIds) public  {
+    function denyListChainIds(uint64[] memory chainIds) public {
         for (uint256 i = 0; i < chainIds.length; i++) {
             denyListChainId(chainIds[i]);
         }
@@ -38,9 +46,6 @@ contract ChainIdManager {
      * @return chainId The next usable Chain ID
      */
     function getNextUsableChainId() public returns (uint64 chainId) {
-        // The burnGas function introduces a cost to use up chainIds.
-        // There are uint64(2**63=9.223372e+18) chainIds minus the publicly used chainIds available.
-        // Using all of the chainIds would cost 9.223372e+18 * gasBurnAmount = 9.223372e+24 gas = 6.1489147e+17 blocks = 237226647377 years
         burnGas();
         while (deniedChainIds[chainIdCounter]) {
             chainIdCounter++;

test/ChainIdManager.t.sol

@@ -31,15 +31,14 @@ contract ChainIdManagerTest is Test {
         uint256 finalGas = gasleft();
         assert(currentGas - finalGas >= chainIdManager.gasBurnAmount());
 
-
         uint256 currentGas2 = gasleft();
-        uint64[]  memory newChainIds = new uint64[](6);
-        newChainIds[0]=3;
-        newChainIds[1]=4;
-        newChainIds[2]=5;
-        newChainIds[3]=6;
-        newChainIds[4]=7;
-        newChainIds[5]=8;
+        uint64[] memory newChainIds = new uint64[](6);
+        newChainIds[0] = 3;
+        newChainIds[1] = 4;
+        newChainIds[2] = 5;
+        newChainIds[3] = 6;
+        newChainIds[4] = 7;
+        newChainIds[5] = 8;
         chainIdManager.denyListChainIds(newChainIds);
         uint256 finalGas2 = gasleft();
         assert(currentGas2 - finalGas2 >= chainIdManager.gasBurnAmount() * 6);