IQuoterV2

Supports quoting the calculated amounts from exact input or exact output swaps. For each pool also tells you the number of initialized ticks crossed and the sqrt price of the pool after the swap.

These functions are not marked view because they rely on calling non-view functions and reverting to compute the result. They are also not gas efficient and should not be called on-chain.

Functions​

quoteExactInput​

  function quoteExactInput(
    bytes path,
    uint256 amountIn
  ) external returns (uint256 amountOut, uint160[] sqrtPriceX96AfterList, uint32[] initializedTicksCrossedList, uint256 gasEstimate)

Returns the amount out received for a given exact input swap without executing the swap

Parameters:​

Name	Type	Description
path	bytes	The path of the swap, i.e. each token pair and the pool fee
amountIn	uint256	The amount of the first token to swap

Return Values:​

Name	Type	Description
amountOut	bytes	The amount of the last token that would be received
sqrtPriceX96AfterList	uint256	List of the sqrt price after the swap for each pool in the path
initializedTicksCrossedList		List of the initialized ticks that the swap crossed for each pool in the path
gasEstimate		The estimate of the gas that the swap consumes

quoteExactInputSingle​

  function quoteExactInputSingle(
    struct IQuoterV2.QuoteExactInputSingleParams params
  ) external returns (uint256 amountOut, uint160 sqrtPriceX96After, uint32 initializedTicksCrossed, uint256 gasEstimate)

Returns the amount out received for a given exact input but for a swap of a single pool

Parameters:​

Name	Type	Description
params	struct IQuoterV2.QuoteExactInputSingleParams	The params for the quote, encoded as QuoteExactInputSingleParams

tokenIn The token being swapped in tokenOut The token being swapped out fee The fee of the token pool to consider for the pair amountIn The desired input amount sqrtPriceLimitX96 The price limit of the pool that cannot be exceeded by the swap

Return Values:​

Name	Type	Description
amountOut	struct IQuoterV2.QuoteExactInputSingleParams	The amount of tokenOut that would be received
sqrtPriceX96After		The sqrt price of the pool after the swap
initializedTicksCrossed		The number of initialized ticks that the swap crossed
gasEstimate		The estimate of the gas that the swap consumes

quoteExactOutput​

  function quoteExactOutput(
    bytes path,
    uint256 amountOut
  ) external returns (uint256 amountIn, uint160[] sqrtPriceX96AfterList, uint32[] initializedTicksCrossedList, uint256 gasEstimate)

Returns the amount in required for a given exact output swap without executing the swap

Parameters:​

Name	Type	Description
path	bytes	The path of the swap, i.e. each token pair and the pool fee. Path must be provided in reverse order
amountOut	uint256	The amount of the last token to receive

Return Values:​

Name	Type	Description
amountIn	bytes	The amount of first token required to be paid
sqrtPriceX96AfterList	uint256	List of the sqrt price after the swap for each pool in the path
initializedTicksCrossedList		List of the initialized ticks that the swap crossed for each pool in the path
gasEstimate		The estimate of the gas that the swap consumes

quoteExactOutputSingle​

  function quoteExactOutputSingle(
    struct IQuoterV2.QuoteExactOutputSingleParams params
  ) external returns (uint256 amountIn, uint160 sqrtPriceX96After, uint32 initializedTicksCrossed, uint256 gasEstimate)

Returns the amount in required to receive the given exact output amount but for a swap of a single pool

Parameters:​

Name	Type	Description
params	struct IQuoterV2.QuoteExactOutputSingleParams	The params for the quote, encoded as QuoteExactOutputSingleParams

tokenIn The token being swapped in tokenOut The token being swapped out fee The fee of the token pool to consider for the pair amountOut The desired output amount sqrtPriceLimitX96 The price limit of the pool that cannot be exceeded by the swap

Return Values:​

Name	Type	Description
amountIn	struct IQuoterV2.QuoteExactOutputSingleParams	The amount required as the input for the swap in order to receive amountOut
sqrtPriceX96After		The sqrt price of the pool after the swap
initializedTicksCrossed		The number of initialized ticks that the swap crossed
gasEstimate		The estimate of the gas that the swap consumes