INonfungiblePositionManager

Wraps DragonswapV2 positions in a non-fungible token interface which allows for them to be transferred and authorized.

Parameter Structs​

MintParams​

  struct MintParams {
        address token0;
        address token1;
        uint24 fee;
        int24 tickLower;
        int24 tickUpper;
        uint256 amount0Desired;
        uint256 amount1Desired;
        uint256 amount0Min;
        uint256 amount1Min;
        address recipient;
        uint256 deadline;
    }

IncreaseLiquidityParams​

   struct IncreaseLiquidityParams {
        uint256 tokenId;
        uint256 amount0Desired;
        uint256 amount1Desired;
        uint256 amount0Min;
        uint256 amount1Min;
        uint256 deadline;
    }

DecreaseLiquidityParams​

    struct DecreaseLiquidityParams {
        uint256 tokenId;
        uint128 liquidity;
        uint256 amount0Min;
        uint256 amount1Min;
        uint256 deadline;
    }

CollectParams​

    struct CollectParams {
        uint256 tokenId;
        address recipient;
        uint128 amount0Max;
        uint128 amount1Max;
    }

Functions​

positions​

  function positions(
    uint256 tokenId
  ) external view returns (uint96 nonce, address operator, address token0, address token1, uint24 fee, int24 tickLower, int24 tickUpper, uint128 liquidity, uint256 feeGrowthInside0LastX128, uint256 feeGrowthInside1LastX128, uint128 tokensOwed0, uint128 tokensOwed1)

Returns the position information associated with a given token ID.

Throws if the token ID is not valid.

Parameters:​

Name	Type	Description
tokenId	uint256	The ID of the token that represents the position

Return Values:​

Name	Type	Description
nonce	uint96	The nonce for permits
operator	address	The address that is approved for spending
token0	address	The address of the token0 for a specific pool
token1	address	The address of the token1 for a specific pool
fee	uint24	The fee associated with the pool
tickLower	int24	The lower end of the tick range for the position
tickUpper	int24	The higher end of the tick range for the position
liquidity	uint128	The liquidity of the position
feeGrowthInside0LastX128	uint256	The fee growth of token0 as of the last action on the individual position
feeGrowthInside1LastX128	uint256	The fee growth of token1 as of the last action on the individual position
tokensOwed0	uint128	The uncollected amount of token0 owed to the position as of the last computation
tokensOwed1	uint128	The uncollected amount of token1 owed to the position as of the last computation

createAndInitializePoolIfNecessary​

  function createAndInitializePoolIfNecessary(
    address tokenA,
    address tokenB,
    uint24 fee,
    uint160 sqrtPriceX96
  ) external returns (address pool)

Creates a new pool if it does not exist, then initializes if not initialized

This method can be bundled with mint for the first mint of a pool to create, initialize a pool and mint at the same time

Parameters:​

Name	Type	Description
tokenA	address	The contract address of either token0 or token1
tokenB	address	The contract address of the other token
fee	uint24	The fee amount of the v3 pool for the specified token pair
sqrtPriceX96	uint160	The initial square root price of the pool as a Q64.96 value

We use tokenA and tokenB when we are referring to unsorted, or unordered tokens

Return Values:​

Name	Type	Description
pool	address	Returns the pool address based on the pair of tokens and fee, will return the newly created pool address if necessary

mint​

  function mint(
    struct INonfungiblePositionManager.MintParams params
  ) external returns (uint256 tokenId, uint128 liquidity, uint256 amount0, uint256 amount1)

Creates a new position wrapped in a NFT

Call this when the pool does exist and is initialized. Note that if the pool is created but not initialized a method does not exist, i.e. the pool is assumed to be initialized.

Parameters:​

Name	Type	Description
params	struct INonfungiblePositionManager.MintParams	The params necessary to mint a position, encoded as MintParams in calldata

Return Values:​

Name	Type	Description
tokenId	uint256	The ID of the token that represents the minted position
liquidity	uint128	The amount of liquidity for this position
amount0	uint256	The amount of token0
amount1	uint256	The amount of token1

increaseLiquidity​

  function increaseLiquidity(
    struct INonfungiblePositionManager.IncreaseLiquidityParams params
  ) external returns (uint128 liquidity, uint256 amount0, uint256 amount1)

Increases the amount of liquidity in a position, with tokens paid by the msg.sender

Parameters:​

Name	Type	Description
params	struct INonfungiblePositionManager.IncreaseLiquidityParams	tokenId The ID of the token for which liquidity is being increased,

Return Values:​

Name	Type	Description
liquidity	uint128	The new liquidity amount as a result of the increase
amount0	uint256	The amount of token0 to acheive resulting liquidity
amount1	uint256	The amount of token1 to acheive resulting liquidity

decreaseLiquidity​

  function decreaseLiquidity(
    struct INonfungiblePositionManager.DecreaseLiquidityParams params
  ) external returns (uint256 amount0, uint256 amount1)

Decreases the amount of liquidity in a position and accounts it to the position

Parameters:​

Name	Type	Description
params	struct INonfungiblePositionManager.DecreaseLiquidityParams	tokenId The ID of the token for which liquidity is being decreased

Return Values:​

Name	Type	Description
amount0	uint256	The amount of token0 sent to recipient
amount1	uint256	The amount of token1 sent to recipient

collect​

  function collect(
    struct INonfungiblePositionManager.CollectParams params
  ) external returns (uint256 amount0, uint256 amount1)

Collects up to a maximum amount of fees owed to a specific position to the recipient

Parameters:​

Name	Type	Description
params	struct INonfungiblePositionManager.CollectParams	tokenId The ID of the NFT for which tokens are being collected,

Return Values:​

Name	Type	Description
amount0	uint256	The amount of fees collected in token0
amount1	uint256	The amount of fees collected in token1

burn​

  function burn(
    uint256 tokenId
  ) external

Burns a token ID, which deletes it from the NFT contract. The token must have 0 liquidity and all tokens must be collected first.

Parameters:​

Name	Type	Description
tokenId	uint256	The ID of the token that is being burned

Events​

IncreaseLiquidity​

  event IncreaseLiquidity(
    uint256 tokenId,
    uint128 liquidity,
    uint256 amount0,
    uint256 amount1
  )

Emitted when liquidity is increased for a position NFT

Also emitted when a token is minted

Parameters:​

Name	Type	Description
tokenId	uint256	The ID of the token for which liquidity was increased
liquidity	uint128	The amount by which liquidity for the NFT position was increased
amount0	uint256	The amount of token0 that was paid for the increase in liquidity
amount1	uint256	The amount of token1 that was paid for the increase in liquidity

DecreaseLiquidity​

  event DecreaseLiquidity(
    uint256 tokenId,
    uint128 liquidity,
    uint256 amount0,
    uint256 amount1
  )

Emitted when liquidity is decreased for a position NFT

Parameters:​

Name	Type	Description
tokenId	uint256	The ID of the token for which liquidity was decreased
liquidity	uint128	The amount by which liquidity for the NFT position was decreased
amount0	uint256	The amount of token0 that was accounted for the decrease in liquidity
amount1	uint256	The amount of token1 that was accounted for the decrease in liquidity

Collect​

  event Collect(
    uint256 tokenId,
    address recipient,
    uint256 amount0,
    uint256 amount1
  )

Emitted when tokens are collected for a position NFT

The amounts reported may not be exactly equivalent to the amounts transferred, due to rounding behavior

Parameters:​

Name	Type	Description
tokenId	uint256	The ID of the token for which underlying tokens were collected
recipient	address	The address of the account that received the collected tokens
amount0	uint256	The amount of token0 owed to the position that was collected
amount1	uint256	The amount of token1 owed to the position that was collected