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SwapMath

PreviousSqrtPriceMathNextTick

Last updated 9 months ago

Contains methods for computing the result of a swap within a single tick price range, i.e., a single tick.

Functions

computeSwapStep

  function computeSwapStep(
    uint160 sqrtRatioCurrentX96,
    uint160 sqrtRatioTargetX96,
    uint128 liquidity,
    int256 amountRemaining,
    uint24 feePips
  ) internal pure returns (uint160 sqrtRatioNextX96, uint256 amountIn, uint256 amountOut, uint256 feeAmount)

Computes the result of swapping some amount in, or amount out, given the parameters of the swap

The fee, plus the amount in, will never exceed the amount remaining if the swap's amountSpecified is positive

Parameters:

Name
Type
Description

sqrtRatioCurrentX96

uint160

The current sqrt price of the pool

sqrtRatioTargetX96

uint160

The price that cannot be exceeded, from which the direction of the swap is inferred

liquidity

uint128

The usable liquidity

amountRemaining

int256

How much input or output amount is remaining to be swapped in/out

feePips

uint24

The fee taken from the input amount, expressed in hundredths of a bip

Name
Type
Description

sqrtRatioNextX96

uint160

The price after swapping the amount in/out, not to exceed the price target

amountIn

uint256

The amount to be swapped in, of either token0 or token1, based on the direction of the swap

amountOut

uint256

The amount to be received, of either token0 or token1, based on the direction of the swap

feeAmount

uint256

The amount of input that will be taken as a fee

Return Values:

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