From 3fb91b6136d671f70ad1d918955952bf026f1902 Mon Sep 17 00:00:00 2001
From: cryptoDev222 <genius.developer.63@gmail.com>
Date: Tue, 10 Aug 2021 10:18:33 -0500
Subject: [PATCH] implement burn function

---
 contracts/mainnet/connectors/uniswapV3/events.sol  |  2 ++
 contracts/mainnet/connectors/uniswapV3/helpers.sol | 10 ++++++++++
 contracts/mainnet/connectors/uniswapV3/main.sol    | 13 +++++++++++++
 3 files changed, 25 insertions(+)

diff --git a/contracts/mainnet/connectors/uniswapV3/events.sol b/contracts/mainnet/connectors/uniswapV3/events.sol
index 0e64e70b..2be7aac0 100644
--- a/contracts/mainnet/connectors/uniswapV3/events.sol
+++ b/contracts/mainnet/connectors/uniswapV3/events.sol
@@ -28,4 +28,6 @@ contract Events {
         uint256 amtIn,
         uint256 amtOut
     );
+
+    event burn(uint256 tokenId);
 }
diff --git a/contracts/mainnet/connectors/uniswapV3/helpers.sol b/contracts/mainnet/connectors/uniswapV3/helpers.sol
index 9c098756..306b1dab 100644
--- a/contracts/mainnet/connectors/uniswapV3/helpers.sol
+++ b/contracts/mainnet/connectors/uniswapV3/helpers.sol
@@ -127,6 +127,9 @@ abstract contract Helpers is DSMath, Basic {
         (tokenId, liquidity, amount0, amount1) = nftManager.mint(params);
     }
 
+    /**
+     * @dev Check if token address is etherAddr and convert it to weth
+     */
     function _checkETH(
         uint256 _tokenId,
         uint256 _amount0,
@@ -233,4 +236,11 @@ abstract contract Helpers is DSMath, Basic {
             );
         amountOut = swapRouter.exactInputSingle(params);
     }
+
+    /**
+     * @dev Burn Function
+     */
+    function _burn(uint256 _tokenId) internal {
+        nftManager.burn(_tokenId);
+    }
 }
diff --git a/contracts/mainnet/connectors/uniswapV3/main.sol b/contracts/mainnet/connectors/uniswapV3/main.sol
index cda8576b..40987e17 100644
--- a/contracts/mainnet/connectors/uniswapV3/main.sol
+++ b/contracts/mainnet/connectors/uniswapV3/main.sol
@@ -183,6 +183,19 @@ abstract contract UniswapResolver is Helpers, Events {
         _eventName = "collect(uint256,uint256,uint256)";
         _eventParam = abi.encode(tokenId, amount0, amount1);
     }
+
+    /**
+     * @dev Burn Function
+     */
+    function burnNFT(uint256 tokenId)
+        external
+        payable
+        returns (string memory _eventName, bytes memory _eventParam)
+    {
+        _burn(tokenId);
+        _eventName = "burnPosition(uint256)";
+        _eventParam = abi.encode(tokenId);
+    }
 }
 
 contract ConnectV2UniswapV3 is UniswapResolver {