# Position Manager ### Code[#](https://docs.quickswap.exchange/reference/smart-contracts/v3/position-manager#code) [`NonfungiblePositionManager.sol`](https://polygonscan.com/address/0x8eF88E4c7CfbbaC1C163f7eddd4B578792201de6) ### Address `NonfungiblePositionManager` is deployed at `0x8eF88E4c7CfbbaC1C163f7eddd4B578792201de6` on the Polygon [mainnet](https://polygonscan.com/address/0x8eF88E4c7CfbbaC1C163f7eddd4B578792201de6). ## Events ### IncreaseLiquidity `event IncreaseLiquidity(uint256 indexed tokenId, uint128 liquidity, uint128 actualLiquidity, uint256 amount0, uint256 amount1, address pool);` Emitted when a position NFT is created via [mint](https://docs.quickswap.exchange/reference/smart-contracts/v3/position-manager#mint) or liquidity is increased for a position NFT. * `tokenId` The ID of the token for which liquidity was increased. * `liquidity` The amount by which liquidity for the NFT position was increased * `actualLiquidity` The actual liquidity that was added into a pool. Could differ from `liquidity` when using FeeOnTransfer tokens * `amount0` The amount of token0 that was paid for the increase in liquidity * `amount1` The amount of token1 that was paid for the increase in liquidity ### DecreaseLiquidit `event DecreaseLiquidity(uint256 indexed tokenId, uint128 liquidity, uint256 amount0, uint256 amount1);` Emitted when liquidity is removed from a position NFT. * `tokenId` The ID of the token for which liquidity was decreased * `liquidity` The amount by which liquidity for the NFT position was decreased * `amount0` The amount of token0 that was accounted for the decrease in liquidity * `amount1` The amount of token1 that was accounted for the decrease in liquidity ### Collect `event Collect(uint256 indexed 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 * `tokenId` The ID of the token for which underlying tokens were collected * `recipient` The address of the account that received the collected tokens * `amount0` The amount of token0 owed to the position that was collected * `amount1` The amount of token1 owed to the position that was collected ## Read-Only Functions ### positions `function positions(uint256 tokenId) external view override returns (uint96 nonce, address operator, address token0, address token1, 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. Params * `tokenId` The ID of the token that represents the position Returns * `nonce` The nonce for permits * `operator` The address that is approved for spending * `token0` The address of the token0 for a specific pool * `token1` The address of the token1 for a specific pool * `tickLower` The lower end of the tick range for the position * `tickUpper` The higher end of the tick range for the position * `liquidity` The liquidity of the position * `feeGrowthInside0LastX128` The fee growth of token0 as of the last action on the individual position * `feeGrowthInside1LastX128` The fee growth of token1 as of the last action on the individual position * `tokensOwed0` The uncollected amount of token0 owed to the position as of the last computation * `tokensOwed1` The uncollected amount of token1 owed to the position as of the last computation ## State-Changing Functions ### mint `struct MintParams {address token0;address token1;int24 tickLower;int24 tickUpper;uint256 amount0Desired;uint256 amount1Desired;uint256 amount0Min;uint256 amount1Min;address recipient;uint256 deadline;}function mint(MintParams calldata params) external payable override checkDeadline(params.deadline) 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 initialised. Note that if the pool is created but not initialised a method does not exist, i.e. the pool is assumed to be initialised. Params * `params` The params necessary to mint a position, encoded as `MintParams` in calldata Returns * `tokenId` The ID of the token that represents the minted position * `liquidity` The amount of liquidity for this position * `amount0` The amount of token0 * `amount1` The amount of token1 * Emits [IncreaseLiquidity](https://docs.quickswap.exchange/reference/smart-contracts/v3/position-manager#increaseliquidity). ### increaseLiquidity `struct IncreaseLiquidityParams {uint256 tokenId;uint256 amount0Desired;uint256 amount1Desired;uint256 amount0Min;uint256 amount1Min;uint256 deadline;}function increaseLiquidity(IncreaseLiquidityParams calldata params) external payable override checkDeadline(params.deadline) returns (uint128 liquidity, uint256 amount0, uint256 amount1)` Increases the amount of liquidity in a position, with tokens paid by the `msg.sender` Params * `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 * `liquidity` The new liquidity amount as a result of the increase * `amount0` The amount of token0 to achieve resulting liquidity * `amount1` The amount of token1 to achieve resulting liquidity * Emits [IncreaseLiquidity](https://docs.quickswap.exchange/reference/smart-contracts/v3/position-manager#increaseliquidity). ### decreaseLiquidity `struct DecreaseLiquidityParams {uint256 tokenId;uint128 liquidity;uint256 amount0Min;uint256 amount1Min;uint256 deadline;}function decreaseLiquidity(DecreaseLiquidityParams calldata params) external payable override isAuthorizedForToken(params.tokenId) checkDeadline(params.deadline) returns (uint256 amount0, uint256 amount1)` Remove the amount of liquidity in a position and accounts it to the position Params * `tokenId` The ID of the token for which liquidity is being decreased * `liquidity` 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 * `amount0` The amount of token0 accounted to the position's tokens owed * `amount1` The amount of token1 accounted to the position's tokens owed * Emits [DecreaseLiquidity](https://docs.quickswap.exchange/reference/smart-contracts/v3/position-manager#decreaseliquidity). ### collect `struct CollectParams {uint256 tokenId;address recipient;uint128 amount0Max;uint128 amount1Max;}function collect(CollectParams calldata params) external payable override isAuthorizedForToken(params.tokenId) returns (uint256 amount0, uint256 amount1)` Collects up to a maximum amount of fees owed to a specific position to the recipient Params * `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 * `amount0` The amount of fees collected in token0 * `amount1` The amount of fees collected in token1 * Emits [Collect](https://docs.quickswap.exchange/reference/smart-contracts/v3/position-manager#collect). ### burn `function burn(uint256 tokenId) external payable;` Burns a token ID, which deletes it from the NFT contract. The token must have 0 liquidity and all tokens must be collected first. * `tokenId` The ID of the token that is being burned ## Interface ``` pragma solidity >=0.5.0; interface INonfungiblePositionManager is IPoolInitializer, IPeripheryPayments, IPeripheryImmutableState, IERC721Metadata, IERC721Enumerable, IERC721Permit { event IncreaseLiquidity( uint256 indexed tokenId, uint128 liquidity, uint128 actualLiquidity, uint256 amount0, uint256 amount1, address pool ); event DecreaseLiquidity(uint256 indexed tokenId, uint128 liquidity, uint256 amount0, uint256 amount1); event Collect(uint256 indexed tokenId, address recipient, uint256 amount0, uint256 amount1); function positions(uint256 tokenId) external view returns ( uint96 nonce, address operator, address token0, address token1, int24 tickLower, int24 tickUpper, uint128 liquidity, uint256 feeGrowthInside0LastX128, uint256 feeGrowthInside1LastX128, uint128 tokensOwed0, uint128 tokensOwed1 ); struct MintParams { address token0; address token1; int24 tickLower; int24 tickUpper; uint256 amount0Desired; uint256 amount1Desired; uint256 amount0Min; uint256 amount1Min; address recipient; uint256 deadline; } function mint(MintParams calldata params) external payable returns ( uint256 tokenId, uint128 liquidity, uint256 amount0, uint256 amount1 ); struct IncreaseLiquidityParams { uint256 tokenId; uint256 amount0Desired; uint256 amount1Desired; uint256 amount0Min; uint256 amount1Min; uint256 deadline; } function increaseLiquidity(IncreaseLiquidityParams calldata params) external payable returns ( uint128 liquidity, uint256 amount0, uint256 amount1 ); struct DecreaseLiquidityParams { uint256 tokenId; uint128 liquidity; uint256 amount0Min; uint256 amount1Min; uint256 deadline; } function decreaseLiquidity(DecreaseLiquidityParams calldata params) external payable returns (uint256 amount0, uint256 amount1); struct CollectParams { uint256 tokenId; address recipient; uint128 amount0Max; uint128 amount1Max; } function collect(CollectParams calldata params) external payable returns (uint256 amount0, uint256 amount1); /// @notice Burns a token ID, which deletes it from the NFT contract. The token must have 0 liquidity and all tokens /// must be collected first. /// @param tokenId The ID of the token that is being burned function burn(uint256 tokenId) external payable; } ``` --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.quickswap.exchange/technical-reference/smart-contracts/v3/position-manager.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.