From c338bd4e5a3792d36f3c8c22b699eb903bec286f Mon Sep 17 00:00:00 2001
From: Noah Zinsmeister <noahwz@gmail.com>
Date: Tue, 19 Nov 2019 18:02:47 -0500
Subject: [PATCH] implement rageQuit

---
 contracts/UniswapV2.sol | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/contracts/UniswapV2.sol b/contracts/UniswapV2.sol
index 862e9c0..e6d2e80 100644
--- a/contracts/UniswapV2.sol
+++ b/contracts/UniswapV2.sol
@@ -214,6 +214,30 @@ contract UniswapV2 is IUniswapV2, ERC20("Uniswap V2", "UNI-V2", 18, 0), SafeTran
         );
     }
 
+    function rageQuit(address output, address recipient) external lock returns (uint128 amountOutput) {
+        uint256 liquidity = balanceOf[address(this)];
+        TokenData memory amounts;
+
+        if (output == token0) {
+            amounts.token0 = amountOutput = (liquidity.mul(reserves.token0) / totalSupply).downcast128();
+            require(safeTransfer(token0, recipient, amounts.token0), "UniswapV2: TRANSFER_0_FAILED");
+        } else {
+            amounts.token1 = amountOutput = (liquidity.mul(reserves.token1) / totalSupply).downcast128();
+            require(safeTransfer(token1, recipient, amounts.token1), "UniswapV2: TRANSFER_0_FAILED");
+        }
+
+        if (liquidity > 0) _burn(address(this), liquidity);
+
+        TokenData memory balances = TokenData({
+            token0: IERC20(token0).balanceOf(address(this)).downcast128(),
+            token1: IERC20(token1).balanceOf(address(this)).downcast128()
+        });
+        update(balances);
+        emit LiquidityBurned(
+            msg.sender, recipient, amounts.token0, amounts.token1, balances.token0, balances.token1, liquidity
+        );
+    }
+
     function swap(address input, address recipient) external lock returns (uint128 amountOutput) {
         TokenData memory balances;
         TokenData memory amounts;