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BaseVault

Base contract responsible for the main logic of our vault. It inherits ERC4626 and ERC20 contracts, so, some functions are not shown below. We only document the functions that we did any modification or overridden on it. You can check ERC4626 specification here, and ERC20 here.

Public State Variables

DENOMINATOR

function DENOMINATOR() external view returns (uint256)
DENOMINATOR represents the precision for the following system variables: - MAX_WITHDRAW_FEE - INVESTOR_RATIO
Returns
Name
Type
Description
_0
uint256
Precision number used when calculating the fee

MAX_WITHDRAW_FEE

function MAX_WITHDRAW_FEE() external view returns (uint256)
MAX_WITHDRAW_FEE is a safe check in case the ConfigurationManager sets a fee high enough that can be used as a way to drain funds. The precision of this number is set by constant DENOMINATOR.
Returns
Name
Type
Description
_0
uint256
Max Fee boundary

MIN_INITIAL_ASSETS

function MIN_INITIAL_ASSETS() external view returns (uint256)
Minimum asset amount for the first deposit
This amount prevents the first depositor to steal funds from subsequent depositors. See https://code4rena.com/reports/2022-01-sherlock/#h-01-first-user-can-steal-everyone-elses-tokens​
Returns
Name
Type
Description
_0
uint256
Initial deposit amount

configuration

function configuration() external view returns (contract IConfigurationManager)
Returns
Name
Type
Description
_0
address
ConfigurationManager address

View Methods

currentRoundId

function currentRoundId() external view returns (uint32)
Returns the current round ID.
Returns
Name
Type
Description
_0
uint32
current round Id

isProcessingDeposits

function isProcessingDeposits() external view returns (bool)
Determines whether the Vault is in the processing deposits state.
While it's processing deposits, processDeposits can be called and new shares can be created. During this period deposits, mints, withdraws and redeems are blocked.
Returns
Name
Type
Description
_0
bool
Is processing deposits boolean

processedDeposits

function processedDeposits() external view returns (uint256)
Returns the amount of processed deposits entering the next round.
Returns
Name
Type
Description
_0
uint256
Amount of processed deposits entering the next round.

queuedDeposits

function queuedDeposits() external view returns (address[])
Outputs addresses in the deposit queue
Returns
Name
Type
Description
_0
address[]
addresses in deposit queue

controller

function controller() external view returns (address)
Returns the vault controller
Returns
Name
Type
Description
_0
address
Controller address

idleAssetsOf

function idleAssetsOf(address owner) external view returns (uint256)
Outputs the amount of asset tokens of an owner is idle, waiting for the next round.
Parameters
Name
Type
Description
owner
address
Owner address
Returns
Name
Type
Description
_0
uint256
Amount of Idle Assets

getWithdrawFeeRatio

function getWithdrawFeeRatio() external view returns (uint256)
Returns the fee charged on withdraws.
Returns
Name
Type
Description
_0
uint256
Withdraw Fee Ratio

depositQueueSize

function depositQueueSize() external view returns (uint256)
Outputs current size of the deposit queue.
Returns
Name
Type
Description
_0
uint256
Queue Size

maxDeposit

function maxDeposit(address) external view returns (uint256)
Returns the maximum amount of the underlying asset that can be deposited into the Vault for the receiver, through a deposit call. - MUST return a limited value if receiver is subject to some deposit limit. - MUST return 2 ** 256 - 1 if there is no limit on the maximum amount of assets that may be deposited. - MUST NOT revert.
Parameters
Name
Type
Description
_0
address
Owner address
Returns
Name
Type
Description
_0
uint256
Max amount of underlying to deposit

maxMint

function maxMint(address) external view returns (uint256)
Returns the maximum amount of the Vault shares that can be minted for the receiver, through a mint call. - MUST return a limited value if receiver is subject to some mint limit. - MUST return 2 ** 256 - 1 if there is no limit on the maximum amount of shares that may be minted. - MUST NOT revert.
Parameters
Name
Type
Description
_0
address
Owner Address
Returns
Name
Type
Description
_0
uint256
Max amount of shares that can be minted

maxRedeem

function maxRedeem(address owner) external view returns (uint256)
Returns the maximum amount of Vault shares that can be redeemed from the owner balance in the Vault, through a redeem call. - MUST return a limited value if owner is subject to some withdrawal limit or timelock. - MUST return balanceOf(owner) if owner is not subject to any withdrawal limit or timelock. - MUST NOT revert.
Parameters
Name
Type
Description
owner
address
Owner Address
Returns
Name
Type
Description
_0
uint256
Max amount of shares that can be redeemed

maxWithdraw

function maxWithdraw(address owner) external view returns (uint256)
Returns the maximum amount of the underlying asset that can be withdrawn from the owner balance in the Vault, through a withdraw call. - MUST return a limited value if owner is subject to some withdrawal limit or timelock. - MUST NOT revert.
Parameters
Name
Type
Description
owner
address
Owner Address
Returns
Name
Type
Description
_0
uint256
Max amount of underlying asset that can be withdrawn

totalAssets

function totalAssets() external view returns (uint256)
Returns the total amount of the underlying asset that is “managed” by Vault. - SHOULD include any compounding that occurs from yield. - MUST be inclusive of any fees that are charged against assets in the Vault. - MUST NOT revert.
Returns
Name
Type
Description
_0
uint256
undefined

totalIdleAssets

function totalIdleAssets() external view returns (uint256)
Outputs the amount of asset tokens is idle, waiting for the next round.
Returns
Name
Type
Description
_0
uint256
undefined

previewRedeem

function previewRedeem(uint256 shares) external view returns (uint256)
Allows an on-chain or off-chain user to simulate the effects of their redeemption at the current block, given current on-chain conditions. - MUST return as close to and no more than the exact amount of assets that would be withdrawn in a redeem call in the same transaction. I.e. redeem should return the same or more assets as previewRedeem if called in the same transaction. - MUST NOT account for redemption limits like those returned from maxRedeem and should always act as though the redemption would be accepted, regardless if the user has enough shares, etc. - MUST be inclusive of withdrawal fees. Integrators should be aware of the existence of withdrawal fees. - MUST NOT revert. NOTE: any unfavorable discrepancy between convertToAssets and previewRedeem SHOULD be considered slippage in share price or some other type of condition, meaning the depositor will lose assets by redeeming.
Parameters
Name
Type
Description
shares
uint256
Shares amount
Returns
Name
Type
Description
_0
uint256
Assets amount

previewWithdraw

function previewWithdraw(uint256 assets) external view returns (uint256)
Because of rounding issues, we did not find a way to return exact shares when including the fees. This is not 100% compliant to ERC4626 specification. You can follow the discussion here: https://ethereum-magicians.org/t/eip-4626-yield-bearing-vault-standard/7900/104 This function will return the number of shares necessary to withdraw assets not including fees. This means that you will need to redeem MORE shares to achieve the net assets.
Parameters
Name
Type
Description
assets
uint256
Assets amount
Returns
Name
Type
Description
_0
uint256
Shares Amount

Write Methods

deposit

function deposit(uint256 assets, address receiver) external nonpayable returns (uint256)
Mints shares Vault shares to receiver by depositing exactly amount of underlying tokens. - MUST emit the Deposit event. - MAY support an additional flow in which the underlying tokens are owned by the Vault contract before the deposit execution, and are accounted for during deposit. - MUST revert if all of assets cannot be deposited (due to deposit limit being reached, slippage, the user not approving enough underlying tokens to the Vault contract, etc). NOTE: most implementations will require pre-approval of the Vault with the Vault’s underlying asset token.
Parameters
Name
Type
Description
assets
uint256
assets
receiver
address
receiver
Returns
Name
Type
Description
_0
uint256
shares

depositWithPermit

function depositWithPermit(uint256 assets, address receiver, uint256 deadline, uint8 v, bytes32 r, bytes32 s) external nonpayable returns (uint256)
Deposit ERC20 tokens with permit, a gasless token approval.
Mints shares to receiver by depositing exactly amount of underlying tokens. For more information on the signature format, see the EIP2612 specification: https://eips.ethereum.org/EIPS/eip-2612#specification
Parameters
Name
Type
Description
assets
uint256
assets
receiver
address
receiver address
deadline
uint256
timestamp deadline
v
uint8
signature parameter v
r
bytes32
signature parameter r
s
bytes32
signature parameter s
Returns
Name
Type
Description
_0
uint256
shares amount

endRound

function endRound() external nonpayable
Closes the round, allowing deposits to the next round be processed. and opens the window for withdraws.

handleMigration

function handleMigration(uint256 assets, address receiver) external nonpayable returns (uint256)
Handle migrated assets.
Parameters
Name
Type
Description
assets
uint256
undefined
receiver
address
undefined
Returns
Name
Type
Description
_0
uint256
Estimation of shares created.

migrate

function migrate() external nonpayable
Migrate assets from this vault to the next vault.
The newVault will be assigned by the ConfigurationManager

processQueuedDeposits

function processQueuedDeposits(address[] depositors) external nonpayable
Distribute shares to depositors queued in the deposit queue, effectively including their assets in the next round.
Parameters
Name
Type
Description
depositors
address[]
Array of owner addresses to process

redeem

function redeem(uint256 shares, address receiver, address owner) external nonpayable returns (uint256 assets)
Burns exactly shares from owner and sends assets of underlying tokens to receiver. - MUST emit the Withdraw event. - MAY support an additional flow in which the underlying tokens are owned by the Vault contract before the redeem execution, and are accounted for during redeem. - MUST revert if all of shares cannot be redeemed (due to withdrawal limit being reached, slippage, the owner not having enough shares, etc). NOTE: some implementations will require pre-requesting to the Vault before a withdrawal may be performed. Those methods should be performed separately.
Parameters
Name
Type
Description
shares
uint256
shares amount
receiver
address
receiver address
owner
address
owner address
Returns
Name
Type
Description
assets
uint256
assets amount

refund

function refund() external nonpayable returns (uint256 assets)
Withdraw all user assets in unprocessed deposits.
Returns
Name
Type
Description
assets
uint256
assets amount

startRound

function startRound() external nonpayable returns (uint32)
Starts the next round, sending the idle funds to the strategy where it should start accruing yield.
Returns
Name
Type
Description
_0
uint32
The new round id

withdraw

function withdraw(uint256 assets, address receiver, address owner) external nonpayable returns (uint256 shares)
Because of rounding issues, we did not find a way to return assets including the fees. This is not 100% compliant to ERC4626 specification. You can follow the discussion here: https://ethereum-magicians.org/t/eip-4626-yield-bearing-vault-standard/7900/104 This function will withdraw the number of assets asked, minus the fee. Example: If the fee is 10% and 100 assets was the input, this function will withdraw 90 assets.
Parameters
Name
Type
Description
assets
uint256
assets amount
receiver
address
receiver address
owner
address
owner address
Returns
Name
Type
Description
shares
uint256
shares amount

mint

function mint(uint256 shares, address receiver) external nonpayable returns (uint256)
Mints exactly shares Vault shares to receiver by depositing amount of underlying tokens. - MUST emit the Deposit event. - MAY support an additional flow in which the underlying tokens are owned by the Vault contract before the mint execution, and are accounted for during mint. - MUST revert if all of shares cannot be minted (due to deposit limit being reached, slippage, the user not approving enough underlying tokens to the Vault contract, etc). NOTE: most implementations will require pre-approval of the Vault with the Vault’s underlying asset token.
Parameters
Name
Type
Description
shares
uint256
undefined
receiver
address
undefined
Returns
Name
Type
Description
_0
uint256
undefined

mintWithPermit

function mintWithPermit(uint256 shares, address receiver, uint256 deadline, uint8 v, bytes32 r, bytes32 s) external nonpayable returns (uint256)
Mint shares with permit, a gasless token approval.
Mints exactly shares to receiver by depositing amount of underlying tokens. For more information on the signature format, see the EIP2612 specification: https://eips.ethereum.org/EIPS/eip-2612#specification​
Parameters
Name
Type
Description
shares
uint256
undefined
receiver
address
undefined
deadline
uint256
undefined
v
uint8
undefined
r
bytes32
undefined
s
bytes32
undefined
Returns
Name
Type
Description
_0
uint256
undefined