IDragonswapV2PoolEvents

Contains all events emitted by the pool

Events​

Initialize​

  event Initialize(
    uint160 sqrtPriceX96,
    int24 tick
  )

Emitted exactly once by a pool when #initialize is first called on the pool

Mint/Burn/Swap cannot be emitted by the pool before Initialize

Parameters:​

Name	Type	Description
sqrtPriceX96	uint160	The initial sqrt price of the pool, as a Q64.96
tick	int24	The initial tick of the pool, i.e. log base 1.0001 of the starting price of the pool

Mint​

  event Mint(
    address sender,
    address owner,
    int24 tickLower,
    int24 tickUpper,
    uint128 amount,
    uint256 amount0,
    uint256 amount1
  )

Emitted when liquidity is minted for a given position

Parameters:​

Name	Type	Description
sender	address	The address that minted the liquidity
owner	address	The owner of the position and recipient of any minted liquidity
tickLower	int24	The lower tick of the position
tickUpper	int24	The upper tick of the position
amount	uint128	The amount of liquidity minted to the position range
amount0	uint256	How much token0 was required for the minted liquidity
amount1	uint256	How much token1 was required for the minted liquidity

Collect​

  event Collect(
    address owner,
    int24 tickLower,
    int24 tickUpper,
    uint128 amount0,
    uint128 amount1
  )

Emitted when fees are collected by the owner of a position

Collect events may be emitted with zero amount0 and amount1 when the caller chooses not to collect fees

Parameters:​

Name	Type	Description
owner	address	The owner of the position for which fees are collected
tickLower	int24	The lower tick of the position
tickUpper	int24	The upper tick of the position
amount0	uint128	The amount of token0 fees collected
amount1	uint128	The amount of token1 fees collected

Burn​

  event Burn(
    address owner,
    int24 tickLower,
    int24 tickUpper,
    uint128 amount,
    uint256 amount0,
    uint256 amount1
  )

Emitted when a position's liquidity is removed

Does not withdraw any fees earned by the liquidity position, which must be withdrawn via #collect

Parameters:​

Name	Type	Description
owner	address	The owner of the position for which liquidity is removed
tickLower	int24	The lower tick of the position
tickUpper	int24	The upper tick of the position
amount	uint128	The amount of liquidity to remove
amount0	uint256	The amount of token0 withdrawn
amount1	uint256	The amount of token1 withdrawn

Swap​

  event Swap(
    address sender,
    address recipient,
    int256 amount0,
    int256 amount1,
    uint160 sqrtPriceX96,
    uint128 liquidity,
    int24 tick
  )

Emitted by the pool for any swaps between token0 and token1

Parameters:​

Name	Type	Description
sender	address	The address that initiated the swap call, and that received the callback
recipient	address	The address that received the output of the swap
amount0	int256	The delta of the token0 balance of the pool
amount1	int256	The delta of the token1 balance of the pool
sqrtPriceX96	uint160	The sqrt(price) of the pool after the swap, as a Q64.96
liquidity	uint128	The liquidity of the pool after the swap
tick	int24	The log base 1.0001 of price of the pool after the swap

Flash​

  event Flash(
    address sender,
    address recipient,
    uint256 amount0,
    uint256 amount1,
    uint256 paid0,
    uint256 paid1
  )

Emitted by the pool for any flashes of token0/token1

Parameters:​

Name	Type	Description
sender	address	The address that initiated the swap call, and that received the callback
recipient	address	The address that received the tokens from flash
amount0	uint256	The amount of token0 that was flashed
amount1	uint256	The amount of token1 that was flashed
paid0	uint256	The amount of token0 paid for the flash, which can exceed the amount0 plus the fee
paid1	uint256	The amount of token1 paid for the flash, which can exceed the amount1 plus the fee

IncreaseObservationCardinalityNext​

  event IncreaseObservationCardinalityNext(
    uint16 observationCardinalityNextOld,
    uint16 observationCardinalityNextNew
  )

Emitted by the pool for increases to the number of observations that can be stored

observationCardinalityNext is not the observation cardinality until an observation is written at the index just before a mint/swap/burn.

Parameters:​

Name	Type	Description
observationCardinalityNextOld	uint16	The previous value of the next observation cardinality
observationCardinalityNextNew	uint16	The updated value of the next observation cardinality

SetFeeProtocol​

  event SetFeeProtocol(
    uint8 feeProtocol0Old,
    uint8 feeProtocol1Old,
    uint8 feeProtocol0New,
    uint8 feeProtocol1New
  )

Emitted when the protocol fee is changed by the pool

Parameters:​

Name	Type	Description
feeProtocol0Old	uint8	The previous value of the token0 protocol fee
feeProtocol1Old	uint8	The previous value of the token1 protocol fee
feeProtocol0New	uint8	The updated value of the token0 protocol fee
feeProtocol1New	uint8	The updated value of the token1 protocol fee

CollectProtocol​

  event CollectProtocol(
    address sender,
    address recipient,
    uint128 amount0,
    uint128 amount1
  )

Emitted when the collected protocol fees are withdrawn by the factory owner

Parameters:​

Name	Type	Description
sender	address	The address that collects the protocol fees
recipient	address	The address that receives the collected protocol fees
amount0	uint128	The amount of token0 protocol fees that is withdrawn
amount1	uint128	The amount of token1 protocol fees that is withdrawn