ISubscriber

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Interface that a Subscriber contract should implement to receive updates from the v4 position manager

Functions

notifySubscribe

function notifySubscribe(uint256 tokenId, bytes memory data) external;

Parameters

Name	Type	Description
tokenId	uint256	the token ID of the position
data	bytes	additional data passed in by the caller

notifyUnsubscribe

Called when a position unsubscribes from the subscriber

This call's gas is capped at unsubscribeGasLimit (set at deployment)

Because of EIP-150, solidity may only allocate 63/64 of gasleft()

function notifyUnsubscribe(uint256 tokenId) external;

Parameters

Name	Type	Description
tokenId	uint256	the token ID of the position

notifyModifyLiquidity

function notifyModifyLiquidity(uint256 tokenId, int256 liquidityChange, BalanceDelta feesAccrued) external;

Parameters

Name	Type	Description
tokenId	uint256	the token ID of the position
liquidityChange	int256	the change in liquidity on the underlying position
feesAccrued	BalanceDelta	the fees to be collected from the position as a result of the modifyLiquidity call

notifyTransfer

function notifyTransfer(uint256 tokenId, address previousOwner, address newOwner) external;

Parameters

Name	Type	Description
tokenId	uint256	the token ID of the position
previousOwner	address	address of the old owner
newOwner	address	address of the new owner