Withdrawal Pool

The WithdrawalPool allows users to queue LST withdrawals if there is insufficient liquidity in the PriorityPool to satisfy the withdrawal amount. LST withdrawals will be added to a FIFO queue and will be fulfilled as the PriorityPool receives new deposits and/or as funds become available for withdrawal within the StakingPool.

View Functions

token

Returns the address of the token this pool handles

function token() external view returns (address)

Return Values

Name	Type	Description
token	address	address of token

lst

Returns the address of the liquid staking token this pool handles

function lst() external view returns (address)

Return Values

Name	Type	Description
lst	address	address of lst

priorityPool

Returns the address of the priority pool

function priorityPool() external view returns (address)

Return Values

Name	Type	Description
priorityPool	address	address of Priority Pool

indexOfNextWithdrawal

Returns the index of the withdrawal that's at the front of the queue

function indexOfNextWithdrawal() external view returns (uint256)

Return Values

Name	Type	Description
indexOfNextwithdrawal	uint256	index of withdrawal at front of queue

withdrawalBatchIdCutoff

Returns the index where all batches before have had all withdrawal requests fully withdrawn

function withdrawalBatchIdCutoff() external view returns (uint128)

Return Values

Name	Type	Description
withdrawalBatchIdCutoff	uint128	batch id cutoff

withdrawalIdCutoff

Returns the index where all requests before have been fully withdrawn

function withdrawalIdCutoff() external view returns (uint128)

Return Values

Name	Type	Description
withdrawalIdCutoff	uint128	withdrawal id cutoff

minWithdrawalAmount

Returns the min amount of LSTs that can be queued for withdrawal

function minWithdrawalAmount() external view returns (uint256)

Return Values

Name	Type	Description
minWithdrawalAmount	uint256	min withdrawal amount

minTimeBetweenWithdrawals

Returns the min amount of time between execution of withdrawals

function minTimeBetweenWithdrawals() external view returns (uint64)

Return Values

Name	Type	Description
minTimeBetweenwithdrawals	uint64	min time between withdrawals

timeOfLastWithdrawal

Returns the time of last execution of withdrawals

function timeOfLastWithdrawal() external view returns (uint64)

Return Values

Name	Type	Description
timeOfLastWithdrawal	uint64	time of last withdrawal

getTotalQueuedWithdrawals

Returns the total amount of liquid staking tokens queued for withdrawal

function getTotalQueuedWithdrawals() external view returns (uint256)

Return Values

Name	Type	Description
totalQueuedWithdrawals	uint256	total amount queued for withdrawal

getWithdrawals

Returns a list of withdrawals

function getWithdrawals(uint256[] _withdrawalIds) external view returns (struct WithdrawalPool.Withdrawal[])

Parameters

Name	Type	Description
_withdrawalIds	uint256[]	list of withdrawal ids

Return Values

Name	Type	Description
withdrawals	struct WithdrawalPool.Withdrawal[]	list of withdrawals corresponding to withdrawal ids

getBatchIds

Returns batch ids for a list of withdrawals

function getBatchIds(uint256[] _withdrawalIds) public view returns (uint256[])

Parameters

Name	Type	Description
_withdrawalIds	uint256[]	list of withrawal ids

Return Values

Name	Type	Description
batchIds	uint256[]	list of batch ids corresponding to withdrawal ids

getWithdrawalIdsByOwner

Returns a list of withdrawal ids owned by an account

function getWithdrawalIdsByOwner(address _account) public view returns (uint256[])

Parameters

Name	Type	Description
_account	address	address of account

Return Values

Name	Type	Description
withdrawalIds	uint256[]	list of withdrawal ids

getFinalizedWithdrawalIdsByOwner

Returns a list of finalized and partially finalized withdrawal ids owned by an account

These withdrawals have funds available for the owner to withdraw

function getFinalizedWithdrawalIdsByOwner(address _account) external view returns (uint256[], uint256)

Parameters

Name	Type	Description
_account	address	address of account

Return Values

Name	Type	Description
withdrawalIds	uint256[]	list of withdrawal ids
withdrawable	uint256	total withdrawable across all account's withdrawals

checkUpkeep

Returns whether withdrawals should be executed based on available withdrawal space

function checkUpkeep(bytes) external view returns (bool, bytes)

Return Values

Name	Type	Description
upkeepNeeded	bool	true if withdrawal should be executed, false otherwise
	bytes

Write Funcions

withdraw

Executes a group of fully and/or partially finalized withdrawals owned by the sender

function withdraw(uint256[] _withdrawalIds, uint256[] _batchIds) external

Parameters

Name	Type	Description
_withdrawalIds	uint256[]	list of withdrawal ids to execute
_batchIds	uint256[]	list of batch ids corresponding to withdrawal ids

queueWithdrawal

Queues a withdrawal of liquid staking tokens for an account

function queueWithdrawal(address _account, uint256 _amount) external

Parameters

Name	Type	Description
_account	address	address of account
_amount	uint256	amount of LST

deposit

Deposits asset tokens in exchange for liquid staking tokens, finalizing withdrawals starting from the front of the queue

function deposit(uint256 _amount) external

Parameters

Name	Type	Description
_amount	uint256	amount of tokens to deposit

performUpkeep

Executes withdrawals if there is sufficient available withdrawal space

function performUpkeep(bytes _performData) external

Parameters

Name	Type	Description
_performData	bytes	encoded list of withdrawal data passed to staking pool strategies

updateWithdrawalBatchIdCutoff

Updates the withdrawalBatchIdCutoff

This value is used to more efficiently return data in getBatchIds by skipping old withdrawal batches

function updateWithdrawalBatchIdCutoff() external

setMinWithdrawalAmount

Sets the minimum amount of liquid staking tokens that can be queued for withdrawal

function setMinWithdrawalAmount(uint256 _minWithdrawalAmount) external

Parameters

Name	Type	Description
_minWithdrawalAmount	uint256	minimum token amount

setMinTimeBetweenWithdrawals

Sets the minimum amount of of time between calls to performUpkeep to finalize withdrawals

function setMinTimeBetweenWithdrawals(uint64 _minTimeBetweenWithdrawals) external

Parameters

Name	Type	Description
_minTimeBetweenWithdrawals	uint64	minimum time