Nonfungible Position Manager

NFT positions

Wraps Algebra positions in the ERC721 non-fungible token interface

Developer note: Credit to Uniswap Labs under GPL-2.0-or-later license: https://github.com/Uniswap/v3-periphery

Inherits: INonfungiblePositionManager Multicall ERC721Permit PeripheryImmutableState PoolInitializer LiquidityManagement PeripheryValidation SelfPermit

Modifiers

isAuthorizedForToken

modifier isAuthorizedForToken(uint256 tokenId)

Name	Type	Description
tokenId	uint256

Structs

Position

struct Position {
  uint88 nonce;
  address operator;
  uint80 poolId;
  int24 tickLower;
  int24 tickUpper;
  uint128 liquidity;
  uint256 feeGrowthInside0LastX128;
  uint256 feeGrowthInside1LastX128;
  uint128 tokensOwed0;
  uint128 tokensOwed1;
}

MintParams

struct MintParams {
  address token0;
  address token1;
  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;
}

Public variables

NONFUNGIBLE_POSITION_MANAGER_ADMINISTRATOR_ROLE

bytes32 constant NONFUNGIBLE_POSITION_MANAGER_ADMINISTRATOR_ROLE = 0xff0e0466f109fcf4f5660899d8847c592e1e8dea30ffbe040704b23ad381d762

Selector: 0xb227aa79

Developer note: The role which has the right to change the farming center address

farmingCenter

address farmingCenter

Selector: 0xdd56e5d8

Returns the address of currently connected farming, if any

farmingApprovals

mapping(uint256 => address) farmingApprovals

Selector: 0x2d0b22de

Returns the address of farming that is approved for this token, if any

tokenFarmedIn

mapping(uint256 => address) tokenFarmedIn

Selector: 0xe7ce18a3

Returns the address of farming in which this token is farmed, if any

Functions

constructor

constructor(address _factory, address _WNativeToken, address _tokenDescriptor_, address _poolDeployer) public

Name	Type	Description
_factory	address
_WNativeToken	address
tokenDescriptor	address
_poolDeployer	address

multicall

function multicall(bytes[] data) external payable returns (bytes[] results)

Selector: 0xac9650d8

Call multiple functions in the current contract and return the data from all of them if they all succeed

Developer note: The `msg.value` should not be trusted for any method callable from multicall.

Name	Type	Description
data	bytes[]	The encoded function data for each of the calls to make to this contract

Returns:

Name	Type	Description
results	bytes[]	The results from each of the calls passed in via data

positions

function positions(uint256 tokenId) external view returns (uint88 nonce, address operator, address token0, address token1, int24 tickLower, int24 tickUpper, uint128 liquidity, uint256 feeGrowthInside0LastX128, uint256 feeGrowthInside1LastX128, uint128 tokensOwed0, uint128 tokensOwed1)

Selector: 0x99fbab88

Returns the position information associated with a given token ID.

Developer note: Throws if the token ID is not valid.

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

Returns:

Name	Type	Description
nonce	uint88	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
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

mint

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

Selector: 0x9cc1a283

Creates a new position wrapped in a NFT

Developer note: 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.

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

Returns:

Name	Type	Description
tokenId	uint256	The ID of the token that represents the minted position
liquidity	uint128	The liquidity delta amount as a result of the increase
amount0	uint256	The amount of token0
amount1	uint256	The amount of token1

increaseLiquidity

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

Selector: 0x219f5d17

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

Name	Type	Description
params	struct INonfungiblePositionManager.IncreaseLiquidityParams	tokenId The ID of the token for which liquidity is being increased, amount0Desired The desired amount of token0 to be spent, amount1Desired The desired amount of token1 to be spent, amount0Min The minimum amount of token0 to spend, which serves as a slippage check, amount1Min The minimum amount of token1 to spend, which serves as a slippage check, deadline The time by which the transaction must be included to effect the change

Returns:

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

decreaseLiquidity

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

Selector: 0x0c49ccbe

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

Name	Type	Description
params	struct INonfungiblePositionManager.DecreaseLiquidityParams	tokenId The ID of the token for which liquidity is being decreased, amount The amount by which liquidity will be decreased, amount0Min The minimum amount of token0 that should be accounted for the burned liquidity, amount1Min The minimum amount of token1 that should be accounted for the burned liquidity, deadline The time by which the transaction must be included to effect the change

Returns:

Name	Type	Description
amount0	uint256	The amount of token0 accounted to the position's tokens owed
amount1	uint256	The amount of token1 accounted to the position's tokens owed

collect

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

Selector: 0xfc6f7865

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

Name	Type	Description
params	struct INonfungiblePositionManager.CollectParams	tokenId The ID of the NFT for which tokens are being collected, recipient The account that should receive the tokens, amount0Max The maximum amount of token0 to collect, amount1Max The maximum amount of token1 to collect

Returns:

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 payable

Selector: 0x42966c68

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

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

approveForFarming

function approveForFarming(uint256 tokenId, bool approve, address farmingAddress) external payable

Selector: 0x832f630a

Changes approval of token ID for farming.

Name	Type	Description
tokenId	uint256	The ID of the token that is being approved / unapproved
approve	bool	New status of approval
farmingAddress	address	The address of farming: used to prevent tx frontrun

switchFarmingStatus

function switchFarmingStatus(uint256 tokenId, bool toActive) external

Selector: 0x70227515

Changes farming status of token to 'farmed' or 'not farmed'

Developer note: can be called only by farmingCenter

Name	Type	Description
tokenId	uint256	The ID of the token
toActive	bool	The new status

setFarmingCenter

function setFarmingCenter(address newFarmingCenter) external

Selector: 0x4d10862d

Changes address of farmingCenter

Developer note: can be called only by factory owner or NONFUNGIBLE_POSITION_MANAGER_ADMINISTRATOR_ROLE

Name	Type	Description
newFarmingCenter	address	The new address of farmingCenter

tokenURI

function tokenURI(uint256 tokenId) public view returns (string)

Selector: 0xc87b56dd

Developer note: Returns the Uniform Resource Identifier (URI) for `tokenId` token.

Name	Type	Description
tokenId	uint256

Returns:

Name	Type	Description
[0]	string

getApproved

function getApproved(uint256 tokenId) public view returns (address)

Selector: 0x081812fc

*Developer note: Returns the account approved for `tokenId` token.

Requirements:

• `tokenId` must exist.*

Name	Type	Description
tokenId	uint256

Returns:

Name	Type	Description
[0]	address

isApprovedOrOwner

function isApprovedOrOwner(address spender, uint256 tokenId) external view returns (bool)

Selector: 0x430c2081

Returns whether `spender` is allowed to manage `tokenId`

Developer note: Requirement: `tokenId` must exist

Name	Type	Description
spender	address
tokenId	uint256

Returns:

Name	Type	Description
[0]	bool

Events

IncreaseLiquidity

event IncreaseLiquidity(uint256 tokenId, uint128 liquidityDesired, uint128 actualLiquidity, uint256 amount0, uint256 amount1, address pool)

Emitted when liquidity is increased for a position NFT

Developer note: Also emitted when a token is minted

Name	Type	Description
tokenId	uint256	The ID of the token for which liquidity was increased
liquidityDesired	uint128	The amount by which liquidity for the NFT position was increased
actualLiquidity	uint128	the actual liquidity that was added into a pool. Could differ from liquidity when using FeeOnTransfer tokens
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
pool	address

DecreaseLiquidity

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

Emitted when liquidity is decreased for a position NFT

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

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

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

FarmingFailed

event FarmingFailed(uint256 tokenId)

Emitted if farming failed in call from NonfungiblePositionManager.

Developer note: Should never be emitted

Name	Type	Description
tokenId	uint256	The ID of corresponding token

FarmingCenter

event FarmingCenter(address farmingCenterAddress)

Emitted after farming center address change

Name	Type	Description
farmingCenterAddress	address	The new address of connected farming center