setup

onchain/src/LiquidityManager.sol

@@ -84,6 +84,7 @@ contract LiquidityManager {
     ) {
         factory = _factory;
         WETH9 = _WETH9;
+
     }
 
     function getToken(address token0, address token1) internal view returns (bool token0isWeth, address token) {
@@ -254,5 +255,89 @@ contract LiquidityManager {
         position.liquidity = positionLiquidity - params.liquidity;
 
         emit DecreaseLiquidity(token, params.liquidity, amount0, amount1);
+    }
+
+
+    function compareTokenToEthBalance(uint256 ethAmountInPosition, uint256 tokenAmountInPosition) external view returns (bool hasMoreToken) {
+        // Fetch the current sqrtPriceX96 from the pool
+        (uint160 sqrtPriceX96,,,) = uniswapV3Pool.slot0();
+        
+        // Convert sqrtPriceX96 to a conventional price format
+        // Note: The price is calculated as (sqrtPriceX96^2 / 2^192), simplified here as (price / 2^96) for the sake of example
+        uint256 price = uint256(sqrtPriceX96) * uint256(sqrtPriceX96) / (1 << 96);
+        
+        // Calculate the equivalent token amount for the ETH in the position at the current price
+        // Assuming price is expressed as the amount of token per ETH
+        uint256 equivalentTokenAmountForEth = ethAmountInPosition * price;
+        
+        // Compare to the actual token amount in the position
+        hasMoreToken = tokenAmountInPosition > equivalentTokenAmountForEth;
+        
+        return hasMoreToken;
+    }
+
+////////
+// - check if tick in range, otherwise revert
+// - check if the position has more Token or more ETH, at current price
+//   - if more ETH, 
+//            - calculate the amount of Token needed to be minted to bring the position to 50/50
+//            - mint
+//            - deposit Token into pool
+//   - if more TOKEN
+//            - calculate the amount of token needed to be withdrawn from the position, to bring the position to 50/50
+//            - withdraw
+//            - burn tokens 
+
+    function rebalance(address token, int24 tickLower, int24 tickUpper) external {
+        bool ETH_TOKEN_ZERO = _weth < token;
+
+        PoolKey memory poolKey = PoolAddress.getPoolKey(params.token0, params.token1, FEE);
+        IUniswapV3Pool pool = IUniswapV3Pool(PoolAddress.computeAddress(factory, poolKey));
+
+        // Fetch the current tick from the Uniswap V3 pool
+        (, int24 currentTick, , , , , ) = pool.slot0();
+
+        // Check if current tick is within the specified range
+        require(currentTick >= tickLower && currentTick <= tickUpper, "Current tick out of range");
+
+        // load position
+        TokenPosition memory position = _positions[posKey(token, tickLower, tickUpper)];
+
+        // take the position out
+        uint256 (amount0, amount1) = pool.burn(tickLower, tickUpper, position.liquidity);
+        // TODO: this position might have earned fees, update them here
+
+        // calculate liquidity
+        uint128 liquidity;
+        if (ETH_TOKEN_ZERO) {
+            // extend/contract the range up
+            uint160 sqrtRatioAX96 = TickMath.getSqrtRatioAtTick(tickLower);
+            uint160 sqrtRatioBX96 = TickMath.getSqrtRatioAtTick(currentTick + (currentTick - tickLower));
+            liquidity = LiquidityAmounts.getLiquidityForAmount0(
+                sqrtRatioAX96, sqrtRatioBX96, amount0
+            )
+            // calculate amount for new liquidity
+            uint256 newAmount1 = LiquidityAmounts.getAmount1ForLiquidity(
+                sqrtRatioAX96, sqrtRatioBX96, liquidity
+            )
+            if (newAmount1 > amount1) {
+                IERC20(token).mint(address(this), newAmount1 - amount1 + 1);
+            } else {
+                IERC20(token).burn(address(this), amount1 - newAmount1 + 1);
+            }
+
+        } else {
+            // extend/contract the range down
+            uint160 sqrtRatioAX96 = TickMath.getSqrtRatioAtTick(tickUpper);
+            uint160 sqrtRatioBX96 = TickMath.getSqrtRatioAtTick(currentTick - (tickUpper - currentTick));
+            liquidity = LiquidityAmounts.getLiquidityForAmount1(
+                sqrtRatioAX96, sqrtRatioBX96, ethAmountToProvide
+            );
+        }
+
+        
+
+
+
     }
 }