diff --git a/contracts/deployer.sol b/contracts/deployer.sol
index 5b32762..c1b2cab 100644
--- a/contracts/deployer.sol
+++ b/contracts/deployer.sol
@@ -3,13 +3,13 @@ pragma solidity ^0.6.8;
 
 contract Deployer {
 
-  mapping (address => bool) public isFlusher;
+  mapping (address => bool) public flushers;
 
-  event LogNewProxy(address indexed owner, address indexed logic);
+  event LogNewFlusher(address indexed owner, address indexed flusher, address indexed logic);
 
   // deploy create2 + minimal proxy
   function deployLogic(address owner, address logic) public returns (address proxy) {
-    require(!(isFlusherDeployed(getAddress(owner, logic))), "Flusher-already-deployed");
+    require(!(isFlusherDeployed(getAddress(owner, logic))), "flusher-already-deployed");
     bytes32 salt = keccak256(abi.encodePacked(owner));
     bytes20 targetBytes = bytes20(logic);
     // solium-disable-next-line security/no-inline-assembly
@@ -26,8 +26,8 @@ contract Deployer {
       )
       proxy := create2(0, clone, 0x37, salt)
     }
-    isFlusher[proxy] = true;
-    emit LogNewProxy(owner, logic);
+    flushers[proxy] = true;
+    emit LogNewFlusher(owner, proxy, logic);
   }
 
   function isFlusherDeployed(address _address) public view returns (bool) {
diff --git a/contracts/flusher.sol b/contracts/flusher.sol
index 0b2cdbb..b14f38b 100644
--- a/contracts/flusher.sol
+++ b/contracts/flusher.sol
@@ -14,7 +14,7 @@ contract Flusher {
   string constant public name = "Flusher-v1";
   uint constant version = 1;
 
-  RegistryInterface public constant registry = RegistryInterface(address(0)); // TODO - Change while deploying.
+  RegistryInterface public constant registry = RegistryInterface(address(0)); // TODO - Change while deploying
 
   function spell(address _target, bytes memory _data) internal {
     require(_target != address(0), "target-invalid");
diff --git a/contracts/registry.sol b/contracts/registry.sol
index c428d93..e3a7e6b 100644
--- a/contracts/registry.sol
+++ b/contracts/registry.sol
@@ -117,7 +117,7 @@ contract Registry {
 
   /**
     * @dev update pool rate logic
-    * @param _token pool address
+    * @param _token token address
     * @param _newLogic new rate logic address
   */
   function updatePoolLogic(address _token, address _newLogic) external isMaster {
@@ -131,7 +131,7 @@ contract Registry {
 
   /**
     * @dev update flusher logic
-    * @param _token pool address
+    * @param _token token address
     * @param _newLogic new flusher logic address
   */
   function updateFlusherLogic(address _token, address _newLogic) external isMaster {
@@ -145,7 +145,7 @@ contract Registry {
 
   /**
     * @dev update pool fee
-    * @param _token pool address
+    * @param _token token address
     * @param _newFee new fee amount
   */
   function updateFee(address _token, uint _newFee) external isMaster {
@@ -159,7 +159,7 @@ contract Registry {
 
   /**
     * @dev update pool fee
-    * @param _token pool address
+    * @param _token token address
     * @param _newCap new fee amount
   */
   function updateCap(address _token, uint _newCap) external isMaster {
@@ -169,6 +169,11 @@ contract Registry {
     emit LogUpdateCap(_pool, _newCap);
   }
 
+  /**
+    * @dev adding settlement logic
+    * @param _token token address
+    * @param _logic logic proxy
+  */
   function addSettleLogic(address _token, address _logic) external isMaster {
     address _pool = poolToken[_token];
     require(_pool != address(0), "invalid-pool");
@@ -176,6 +181,11 @@ contract Registry {
     emit LogAddSettleLogic(_pool, _logic);
   }
 
+  /**
+    * @dev removing settlement logic
+    * @param _token token address
+    * @param _logic logic proxy
+  */
   function removeSettleLogic(address _token, address _logic) external isMaster {
     address _pool = poolToken[_token];
     require(_pool != address(0), "invalid-pool");
@@ -183,6 +193,10 @@ contract Registry {
     emit LogRemoveSettleLogic(_pool, _logic);
   }
 
+  /**
+    * @dev enable pool connector
+    * @param _connector logic proxy
+  */
   function enableConnector(address _connector) external isChief {
     require(!connectors[_connector], "already-enabled");
     require(_connector != address(0), "invalid-connector");
@@ -190,12 +204,20 @@ contract Registry {
     emit LogConnectorEnable(_connector);
   }
 
+  /**
+    * @dev disable pool connector
+    * @param _connector logic proxy
+  */
   function disableConnector(address _connector) external isChief {
     require(connectors[_connector], "already-disabled");
     delete connectors[_connector];
     emit LogConnectorDisable(_connector);
   }
 
+  /**
+    * @dev disable pool connector
+    * @param _connector logic proxy
+  */
   function checkSettleLogics(address _pool, address[] calldata _logics) external view returns(bool isOk) {
     isOk = true;
     for (uint i = 0; i < _logics.length; i++) {
@@ -206,6 +228,10 @@ contract Registry {
     }
   }
 
+  /**
+    * @dev check if connectors are enabled
+    * @param _connectors array of logic proxy
+  */
   function isConnector(address[] calldata _connectors) external view returns (bool isOk) {
     isOk = true;
     for (uint i = 0; i < _connectors.length; i++) {