> For the complete documentation index, see [llms.txt](https://pangeaswap.gitbook.io/pangeaswap/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://pangeaswap.gitbook.io/pangeaswap/developers/contracts/core-contracts/concentratedliquiditypool.md). # ConcentratedLiquidityPool {% embed url="" %} ## Overview `Concentrated Liquidity Pool`은 Pangea의 Exchange Module 중 코어 컨트랙트로, 크게 6가지 기능을 수행합니다. 1. MINT : 포지션 생성 2. BURN : 포지션 소각 3. SWAP : 풀에서 스왑처리 4. COLLECT : 발생한 스왑 수수료 수취 5. FLASH : flash loan 수행 6. DEPOSIT\_AIRDROP : 에어드랍 보상 예치 (예치된 에어드랍 보상은 1주간 선형 분배) Concentrated Liquidity Pool은 유저의 자산을 직접적으로 다루기 때문에 Non-Upgradable Contract로 설계되었으며, low level 메서드로 구성되어 있습니다. 이를 처리하기 위해 Concentrated LiquidityPool의 메서드를 직접 호출하기 보다 high level contract인 ConcentratedLiquidityPoolManager와 poolRouter를 통해 호출하길 권합니다. ## Methods ### burn ```solidity function burn(int24 lower, int24 upper, uint128 amount) external nonpayable returns (uint256 token0Amount, uint256 token1Amount) ``` Burns LP tokens - should be called via the Concentrated Liquidity pool manager contract. ### collect ```solidity function collect(int24 lower, int24 upper, uint256 desiredToken0Fees, uint256 desiredToken1Fees) external nonpayable returns (uint256 token0Fees, uint256 token1Fees) ``` Collects tokens owed to a position ### collectProtocolFee ```solidity function collectProtocolFee() external nonpayable returns (uint128, uint128) ``` ### factory ```solidity function factory() external view returns (address) ``` Returns the address of the factory contract ### feeGrowthGlobal0 ```solidity function feeGrowthGlobal0() external view returns (uint256) ``` The fee growth of token0 collected per unit of liquidity for the entire life of the pool ### feeGrowthGlobal1 ```solidity function feeGrowthGlobal1() external view returns (uint256) ``` The fee growth of token1 collected per unit of liquidity for the entire life of the pool ### flash ```solidity function flash(address recipient, uint256 amount0, uint256 amount1, bytes data) external nonpayable ``` Receives token0 or token1 and pays it back with fee ### getAssets ```solidity function getAssets() external view returns (address[] tokens) ``` Returns the list of the tokens of the pool, sorted by address ### getImmutables ```solidity function getImmutables() external view returns (uint128 MAX_TICK_LIQUIDITY, uint24 tickSpacing, uint24 swapFee, address factory, address masterDeployer, address token0, address token1) ``` ### getPriceAndNearestTicks ```solidity function getPriceAndNearestTicks() external view returns (uint160 price, int24 nearestTick) ``` Returns the price and nearestTick ### getReserves ```solidity function getReserves() external view returns (uint128 reserve0, uint128 reserve1) ``` Returns the reserve of token0 and token1 ### getSecondsGrowthAndLastObservation ```solidity function getSecondsGrowthAndLastObservation() external view returns (uint160 secondGrowthGlobal, uint32 lastObservation) ``` Returns the information about seconds growth global and the timestamp of the observation ### liquidity ```solidity function liquidity() external view returns (uint128) ``` Returns the current in range liquidity available to the pool ### mint ```solidity function mint(IConcentratedLiquidityPoolStruct.MintParams data) external nonpayable returns (uint256 liquidityMinted) ``` ### nearestTick ```solidity function nearestTick() external view returns (int24) ``` Returns the tick that is just below the current price. ### positions ```solidity function positions(address owner, int24 lower, int24 upper) external view returns (struct IConcentratedLiquidityPoolStruct.Position) ``` Returns the information about the position ### price ```solidity function price() external view returns (uint160) ``` Sqrt of price aka. √(token1/token0), multiplied by 2^96. ### rangeFeeGrowth ```solidity function rangeFeeGrowth(int24 lower, int24 upper) external view returns (uint256 feeGrowthInside0, uint256 feeGrowthInside1) ``` Returns the fee growth of token0 & token1 inside the given price range ### swap ```solidity function swap(bytes data) external nonpayable returns (uint256 amountOut) ``` Swaps one token for another. The router must prefund this contract and ensure there isn't too much slippage. ### swapFee ```solidity function swapFee() external view returns (uint24) ``` *1000 corresponds to 0.1% fee. Fee is measured in pips.* ### tickSpacing ```solidity function tickSpacing() external view returns (uint24) ``` Returns the tick spacing of the pool. *Ticks can only be used at multiples of this value, minimum of 1 and always positive e.g.: a tickSpacing of 3 means ticks can be created every 3rd tick, i.e., ..., -6, -3, 0, 3, 6, ...Reference: tickSpacing of 100 -> 1% between ticks.* ### ticks ```solidity function ticks(int24 tick) external view returns (struct IConcentratedLiquidityPoolStruct.Tick) ``` Looks up the information about a specific tick in the pool ### token0 ```solidity function token0() external view returns (address) ``` Returns the address of the first of the two tokens of the pool, sorted by address ### token1 ```solidity function token1() external view returns (address) ``` Returns the address of the second of the two tokens of the pool, sorted by address ### totalTicks ```solidity function totalTicks() external view returns (uint256) ``` Returns the number of ticks in the Pool, starts with two ticks (MIN\_TICK \~ MAX\_TICK)