StateLibrary
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A helper library to provide state getters that use extsload
State Variables
POOLS_SLOT
index of pools mapping in the PoolManager
bytes32 public constant POOLS_SLOT = bytes32(uint256(6));
FEE_GROWTH_GLOBAL0_OFFSET
index of feeGrowthGlobal0X128 in Pool.State
uint256 public constant FEE_GROWTH_GLOBAL0_OFFSET = 1;
LIQUIDITY_OFFSET
index of liquidity in Pool.State
uint256 public constant LIQUIDITY_OFFSET = 3;
TICKS_OFFSET
index of TicksInfo mapping in Pool.State: mapping(int24 => TickInfo) ticks;
uint256 public constant TICKS_OFFSET = 4;
TICK_BITMAP_OFFSET
index of tickBitmap mapping in Pool.State
uint256 public constant TICK_BITMAP_OFFSET = 5;
POSITIONS_OFFSET
index of Position.State mapping in Pool.State: mapping(bytes32 => Position.State) positions;
uint256 public constant POSITIONS_OFFSET = 6;
Functions
getSlot0
Get Slot0 of the pool: sqrtPriceX96, tick, protocolFee, lpFee
Corresponds to pools[poolId].slot0
function getSlot0(IPoolManager manager, PoolId poolId)
internal
view
returns (uint160 sqrtPriceX96, int24 tick, uint24 protocolFee, uint24 lpFee);
Parameters
| Name | Type | Description |
|---|---|---|
manager | IPoolManager | The pool manager contract. |
poolId | PoolId | The ID of the pool. |
Returns
| Name | Type | Description |
|---|---|---|
sqrtPriceX96 | uint160 | The square root of the price of the pool, in Q96 precision. |
tick | int24 | The current tick of the pool. |
protocolFee | uint24 | The protocol fee of the pool. |
lpFee | uint24 | The swap fee of the pool. |
getTickInfo
Retrieves the tick information of a pool at a specific tick.
Corresponds to pools[poolId].ticks[tick]
function getTickInfo(IPoolManager manager, PoolId poolId, int24 tick)
internal
view
returns (uint128 liquidityGross, int128 liquidityNet, uint256 feeGrowthOutside0X128, uint256 feeGrowthOutside1X128);
Parameters
| Name | Type | Description |
|---|---|---|
manager | IPoolManager | The pool manager contract. |
poolId | PoolId | The ID of the pool. |
tick | int24 | The tick to retrieve information for. |
Returns
| Name | Type | Description |
|---|---|---|
liquidityGross | uint128 | The total position liquidity that references this tick |
liquidityNet | int128 | The amount of net liquidity added (subtracted) when tick is crossed from left to right (right to left) |
feeGrowthOutside0X128 | uint256 | fee growth per unit of liquidity on the other side of this tick (relative to the current tick) |
feeGrowthOutside1X128 | uint256 | fee growth per unit of liquidity on the other side of this tick (relative to the current tick) |
getTickLiquidity
Retrieves the liquidity information of a pool at a specific tick.
Corresponds to pools[poolId].ticks[tick].liquidityGross and pools[poolId].ticks[tick].liquidityNet. A more gas efficient version of getTickInfo
function getTickLiquidity(IPoolManager manager, PoolId poolId, int24 tick)
internal
view
returns (uint128 liquidityGross, int128 liquidityNet);
Parameters
| Name | Type | Description |
|---|---|---|
manager | IPoolManager | The pool manager contract. |
poolId | PoolId | The ID of the pool. |
tick | int24 | The tick to retrieve liquidity for. |
Returns
| Name | Type | Description |
|---|---|---|
liquidityGross | uint128 | The total position liquidity that references this tick |
liquidityNet | int128 | The amount of net liquidity added (subtracted) when tick is crossed from left to right (right to left) |
getTickFeeGrowthOutside
Retrieves the fee growth outside a tick range of a pool
Corresponds to pools[poolId].ticks[tick].feeGrowthOutside0X128 and pools[poolId].ticks[tick].feeGrowthOutside1X128. A more gas efficient version of getTickInfo
function getTickFeeGrowthOutside(IPoolManager manager, PoolId poolId, int24 tick)
internal
view
returns (uint256 feeGrowthOutside0X128, uint256 feeGrowthOutside1X128);
Parameters
| Name | Type | Description |
|---|---|---|
manager | IPoolManager | The pool manager contract. |
poolId | PoolId | The ID of the pool. |
tick | int24 | The tick to retrieve fee growth for. |
Returns
| Name | Type | Description |
|---|---|---|
feeGrowthOutside0X128 | uint256 | fee growth per unit of liquidity on the other side of this tick (relative to the current tick) |
feeGrowthOutside1X128 | uint256 | fee growth per unit of liquidity on the other side of this tick (relative to the current tick) |
getFeeGrowthGlobals
Retrieves the global fee growth of a pool.
Corresponds to pools[poolId].feeGrowthGlobal0X128 and pools[poolId].feeGrowthGlobal1X128
function getFeeGrowthGlobals(IPoolManager manager, PoolId poolId)
internal
view
returns (uint256 feeGrowthGlobal0, uint256 feeGrowthGlobal1);
Parameters
| Name | Type | Description |
|---|---|---|
manager | IPoolManager | The pool manager contract. |
poolId | PoolId | The ID of the pool. |
Returns
| Name | Type | Description |
|---|---|---|
feeGrowthGlobal0 | uint256 | The global fee growth for token0. |
feeGrowthGlobal1 | uint256 | The global fee growth for token1. |
getLiquidity
Retrieves total the liquidity of a pool.
Corresponds to pools[poolId].liquidity
function getLiquidity(IPoolManager manager, PoolId poolId) internal view returns (uint128 liquidity);
Parameters
| Name | Type | Description |
|---|---|---|
manager | IPoolManager | The pool manager contract. |
poolId | PoolId | The ID of the pool. |
Returns
| Name | Type | Description |
|---|---|---|
liquidity | uint128 | The liquidity of the pool. |
getTickBitmap
Retrieves the tick bitmap of a pool at a specific tick.
Corresponds to pools[poolId].tickBitmap[tick]
function getTickBitmap(IPoolManager manager, PoolId poolId, int16 tick) internal view returns (uint256 tickBitmap);
Parameters
| Name | Type | Description |
|---|---|---|
manager | IPoolManager | The pool manager contract. |
poolId | PoolId | The ID of the pool. |
tick | int16 | The tick to retrieve the bitmap for. |
Returns
| Name | Type | Description |
|---|---|---|
tickBitmap | uint256 | The bitmap of the tick. |
getPositionInfo
Retrieves the position information of a pool without needing to calculate the positionId.
Corresponds to pools[poolId].positions[positionId]
function getPositionInfo(
IPoolManager manager,
PoolId poolId,
address owner,
int24 tickLower,
int24 tickUpper,
bytes32 salt
) internal view returns (uint128 liquidity, uint256 feeGrowthInside0LastX128, uint256 feeGrowthInside1LastX128);
Parameters
| Name | Type | Description |
|---|---|---|
manager | IPoolManager | |
poolId | PoolId | The ID of the pool. |
owner | address | The owner of the liquidity position. |
tickLower | int24 | The lower tick of the liquidity range. |
tickUpper | int24 | The upper tick of the liquidity range. |
salt | bytes32 | The bytes32 randomness to further distinguish position state. |
Returns
| Name | Type | Description |
|---|---|---|
liquidity | uint128 | The liquidity of the position. |
feeGrowthInside0LastX128 | uint256 | The fee growth inside the position for token0. |
feeGrowthInside1LastX128 | uint256 | The fee growth inside the position for token1. |
getPositionInfo
Retrieves the position information of a pool at a specific position ID.
Corresponds to pools[poolId].positions[positionId]
function getPositionInfo(IPoolManager manager, PoolId poolId, bytes32 positionId)
internal
view
returns (uint128 liquidity, uint256 feeGrowthInside0LastX128, uint256 feeGrowthInside1LastX128);
Parameters
| Name | Type | Description |
|---|---|---|
manager | IPoolManager | The pool manager contract. |
poolId | PoolId | The ID of the pool. |
positionId | bytes32 | The ID of the position. |
Returns
| Name | Type | Description |
|---|---|---|
liquidity | uint128 | The liquidity of the position. |
feeGrowthInside0LastX128 | uint256 | The fee growth inside the position for token0. |
feeGrowthInside1LastX128 | uint256 | The fee growth inside the position for token1. |
getPositionLiquidity
Retrieves the liquidity of a position.
Corresponds to pools[poolId].positions[positionId].liquidity. More gas efficient for just retrieiving liquidity as compared to getPositionInfo
function getPositionLiquidity(IPoolManager manager, PoolId poolId, bytes32 positionId)
internal
view
returns (uint128 liquidity);
Parameters
| Name | Type | Description |
|---|---|---|
manager | IPoolManager | The pool manager contract. |
poolId | PoolId | The ID of the pool. |
positionId | bytes32 | The ID of the position. |
Returns
| Name | Type | Description |
|---|---|---|
liquidity | uint128 | The liquidity of the position. |
getFeeGrowthInside
Calculate the fee growth inside a tick range of a pool
pools[poolId].feeGrowthInside0LastX128 in Position.State is cached and can become stale. This function will calculate the up to date feeGrowthInside
function getFeeGrowthInside(IPoolManager manager, PoolId poolId, int24 tickLower, int24 tickUpper)
internal
view
returns (uint256 feeGrowthInside0X128, uint256 feeGrowthInside1X128);
Parameters
| Name | Type | Description |
|---|---|---|
manager | IPoolManager | The pool manager contract. |
poolId | PoolId | The ID of the pool. |
tickLower | int24 | The lower tick of the range. |
tickUpper | int24 | The upper tick of the range. |
Returns
| Name | Type | Description |
|---|---|---|
feeGrowthInside0X128 | uint256 | The fee growth inside the tick range for token0. |
feeGrowthInside1X128 | uint256 | The fee growth inside the tick range for token1. |
_getPoolStateSlot
function _getPoolStateSlot(PoolId poolId) internal pure returns (bytes32);
_getTickInfoSlot
function _getTickInfoSlot(PoolId poolId, int24 tick) internal pure returns (bytes32);
_getPositionInfoSlot
function _getPositionInfoSlot(PoolId poolId, bytes32 positionId) internal pure returns (bytes32);