add whitelist token

contracts/AdhocVoter.sol

@@ -29,6 +29,8 @@ contract AdhocVoter is IAdhocVoter, Initializable {
   mapping(address => uint256) public weights;
   uint256 public totalWeight;
 
+  mapping(address => bool) public isWhitelistedToken;
+
   function initialize() public initializer {
     governor = msg.sender;
     weekly = 100_000 * 1e18;
@@ -97,6 +99,16 @@ contract AdhocVoter is IAdhocVoter, Initializable {
     }
   }
 
+  function whitelistToken(address _token, bool _bool) external {
+    require(msg.sender == governor, "Not Governor");
+    _whitelistToken(_token, _bool);
+  }
+
+  function _whitelistToken(address _token, bool _bool) internal {
+    isWhitelistedToken[_token] = _bool;
+    emit WhitelistToken(msg.sender, _token, _bool);
+  }
+
   function changeWeight(address _gauge, uint256 _weight) external {
     require(_weight >= 10 && _weight <= 100, "invalid weight");
     require(msg.sender == governor, "Not Governor");

contracts/interfaces/IAdhocVoter.sol

@@ -4,13 +4,13 @@ pragma solidity ^0.8.0;
 import {IVoter} from "./IVoter.sol";
 
 interface IAdhocVoter {
-
   event Emission(address indexed sender, uint256 weekly);
   event WeeklyChanged(uint256 weekly);
   event WeightChanged(address gauge, uint256 weight);
   event GovernorChanged(address indexed governor);
   event Donation(address indexed donor, address indexed token, uint256 amount);
   event Withdraw(address indexed operator, address indexed token, address indexed recipcient, uint256 amount);
+  event WhitelistToken(address indexed whitelister, address indexed token, bool indexed _bool);
 
   /// @notice Standard OZ IGovernor using ve for vote weights.
   function governor() external view returns (address);