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:

NameTypeDescription

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:

NameTypeDescription

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:

NameTypeDescription

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Does not withdraw any fees earned by the liquidity position, which must be withdrawn via #collect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

NameTypeDescription

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The amount of token0 withdrawn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The amount of token1 withdrawn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:

NameTypeDescription

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:

NameTypeDescription

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:

NameTypeDescription

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:

NameTypeDescription

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:

NameTypeDescription

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

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