SecondsOutside

Contains methods for working with a mapping from tick to 32 bit timestamp values, specifically seconds spent outside the tick.

The mapping uses int24 for keys since ticks are represented as int24 and there are 8 (2^3) values per word. Note "seconds outside" is always a relative measurement, only consistent for as long as a the lower tick and upper tick have gross liquidity greater than 0.

Functions​

initialize​

  function initialize(
    mapping(int24 => uint256) self,
    int24 tick,
    int24 tickCurrent,
    int24 tickSpacing,
    uint32 time
  ) internal

Called the first time a tick is used to set the seconds outside value. Assumes the tick is not initialized.

Parameters:​

Name	Type	Description
self	mapping(int24 => uint256)	the packed mapping of tick to seconds outside
tick	int24	the tick to be initialized
tickCurrent	int24	the current tick
tickSpacing	int24	the spacing between usable ticks
time	uint32	the current timestamp

clear​

  function clear(
    mapping(int24 => uint256) self,
    int24 tick,
    int24 tickSpacing
  ) internal

Called when a tick is no longer used, to clear the seconds outside value of the tick

Parameters:​

Name	Type	Description
self	mapping(int24 => uint256)	the packed mapping of tick to seconds outside
tick	int24	the tick to be cleared
tickSpacing	int24	the spacing between usable ticks

cross​

  function cross(
    mapping(int24 => uint256) self,
    int24 tick,
    int24 tickSpacing,
    uint32 time
  ) internal

Called when an initialized tick is crossed to update the seconds outside for that tick. Must be called every time an initialized tick is crossed

Parameters:​

Name	Type	Description
self	mapping(int24 => uint256)	the packed mapping of tick to seconds outside
tick	int24	the tick to be crossed
tickSpacing	int24	the spacing between usable ticks
time	uint32	the current block timestamp truncated to 32 bits

get​

  function get(
    mapping(int24 => uint256) self,
    int24 tick,
    int24 tickSpacing
  ) internal view returns (uint32)

Get the seconds outside for an initialized tick. Should be called only on initialized ticks.

Parameters:​

Name	Type	Description
self	mapping(int24 => uint256)	the packed mapping of tick to seconds outside
tick	int24	the tick to get the seconds outside value for
tickSpacing	int24	the spacing between usable ticks

Return Values:​

Type	Description
uint32	seconds outside value for that tick

secondsInside​

  function secondsInside(
    mapping(int24 => uint256) self,
    int24 tickLower,
    int24 tickUpper,
    int24 tickCurrent,
    int24 tickSpacing
  ) internal view returns (uint32)

Get the seconds inside a tick range, assuming both tickLower and tickUpper are initialized

Parameters:​

Name	Type	Description
self	mapping(int24 => uint256)	the packed mapping of tick to seconds outside
tickLower	int24	the lower tick for which to get seconds inside
tickUpper	int24	the upper tick for which to get seconds inside
tickCurrent	int24	the current tick
tickSpacing	int24	the spacing between usable ticks

Return Values:​

Name	Type	Description
a	uint32	relative seconds inside value that can be snapshotted and compared to a later snapshot to compute

time spent between tickLower and tickUpper, i.e. time that a position's liquidity was in use.