// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;

/// @title Contract tracking liquidity position
/// @notice Using these methods farmingCenter receives information about changes in the positions
interface IPositionFollower {
    /// @notice Report a change of liquidity in position
    /// @param tokenId The ID of the token for which liquidity is being added
    /// @param liquidityDelta The amount of added liquidity
    function applyLiquidityDelta(uint256 tokenId, int256 liquidityDelta) external;
}