diff --git a/contracts/bridge/L1Helper.sol b/contracts/bridge/L1Helper.sol
index 5c7e44e..5831736 100644
--- a/contracts/bridge/L1Helper.sol
+++ b/contracts/bridge/L1Helper.sol
@@ -4,6 +4,7 @@ pragma abicoder v2;
 
 import "omnibridge/contracts/helpers/WETHOmnibridgeRouter.sol";
 
+/// @dev Extension for original WETHOmnibridgeRouter that stores TornadoPool account registrations.
 contract L1Helper is WETHOmnibridgeRouter {
   event PublicKey(address indexed owner, bytes key);
 
@@ -18,15 +19,14 @@ contract L1Helper is WETHOmnibridgeRouter {
     address _owner
   ) WETHOmnibridgeRouter(_bridge, _weth, _owner) {}
 
+  /** @dev Registers provided public key and its owner in pool
+   * @param _account pair of address and key
+   */
   function register(Account memory _account) public {
     require(_account.owner == msg.sender, "only owner can be registered");
     _register(_account);
   }
 
-  function _register(Account memory _account) internal {
-    emit PublicKey(_account.owner, _account.publicKey);
-  }
-
   /**
    * @dev Wraps native assets and relays wrapped ERC20 tokens to the other chain.
    * It also calls receiver on other side with the _data provided.
@@ -46,4 +46,8 @@ contract L1Helper is WETHOmnibridgeRouter {
       _register(_account);
     }
   }
+
+  function _register(Account memory _account) internal {
+    emit PublicKey(_account.owner, _account.publicKey);
+  }
 }