Governance parameters

Protocol Governance parameters

Protocol Governance manages the global parameters of the protocol.

Parameter	Description	Unit	Default value
maxTokensPerVault	Maximum different tokens that a vault can manage	#	10
governanceDelay	The delay that has to pass for updating a certain class of params (delayed)	secs	86400
protocolTreasury	The treasury address for protocol fees	address
forceAllowMask	If a bit in this mask is set, the permission is allowed for all addresses	bitmask (uint256)	0
withdrawLimit	The maximum withdrawal per block. The hardcoded minimum value is 200_000 USD	USD	200_000
unitPrices	Token price estimates, used for withdrawLimit. For new token can be set immediately, for updates a cool-down period of 14 days is used.	address (token) => units of token per 1 USD	USDC => 10 ^ 6 ETH => 10 ^ 18 / 3000 BTC => 10 ^ 8 / 45000

Vault Governances parameters

Any Vault kind is governed by a Vault Governance contract. This contract is responsible for governing the parameters for this Vault kind. There are several types of parameters of any governance.

• InternalParams are parameters common for all Vault Governances, to be staged in a constructor of a corresponding Vault Governance and to be updated with a delay by the Governance of the protocol, which are:

Parameter	Description
protocolGovernance	Governance of the protocol (ProtocolGovernance)
registry	Vault registry of the protocol (VaultRegistry)
singleton	Singleton instance of a certain Vault kind, serving as a prototype for all vaults of the Vault Group

• delayedStrategyParams are parameters different for each Vault Governance and for each vault instance (typically being some parameters of the strategy set for an ERC20RootVault instance of this strategy), which may be updated with a delay by a Strategist or Governance

• protocolPerVaultParams are parameters different for each Vault Governance and for each vault instance (typically being some protocol parameters of a single vault), which may be updated with a delay by the Governance

• protocolParams are parameters common for all vaults of the Vault kind, which may be updated immediately by the Governance

• delayedProtocolParams are parameters common for all vaults of the Vault kind, which may be updated with a delay by the Governance

• operatorParams are parameters common for all vaults of the Vault kind, which may be updated immediately by a Strategist or Governance

Getting and setting parameters

There are, therefore, three types of parameters that are to be stated for all vaults of the Vault kind, and three types of parameters that are unique for each vault. These unique parameters are to be set and get not for a vault's address, but for a vault's NFT in the VaultRegistry. An example of getting (the same works for setting) parameters having just the address of a vault:

1. Take a deployed VaultRegistry contract and call nftForVault(address), where address is the address of your vault. If the address is correct, you get an NFT nft
2. Take a corresponding Vault Governance contract and get the wanted parameters. For example, if your vault is ERC20RootVault, you can take the ERC20RootVaultGovernance deployed contract and call delayedStrategyParams(nft), getting stated strategyParams for this vault

Note that a Vault Governance may not have any parameters of some type.

Here are the parameters of Vault Governances we currently have.

Aave VaultGovernance

delayedProtocolParams:

Parameter	Description
lendingPool	Aave lending pool
estimatedAaveAPY	Aave APY estimation for calculating tvl range

UniV3 VaultGovernance

delayedProtocolParams:

Parameter	Description
positionManager	UniV3 position manager
oracle	Oracle used for UniV3 price estimating

Yearn VaultGovernance

delayedProtocolParams:

Parameter	Description
yearnVaultRegistry	Yearn vault registry

As can be seen, Vault kinds on top of the other protocols have only delayedProtocolParams in which we set some basic addresses connected with those protocols which are needed to be called for all instances of this Vault kind.

ERC20 VaultGovernance and Mellow VaultGovernance have no parameters.

ERC20Root VaultGovernance

You might want to see what ERC20Root Vault serves for.

strategyParams:

Parameter	Description
tokenLimitPerAddress	LP tokens limit per address
tokenLimit	LP tokens limit for a whole Vault System

delayedStrategyParams:

Parameter	Description
strategyTreasury	Address of the treasury used for collecting management fees
strategyPerformanceTreasury	Address of the treasury used for collecting performance fees
privateVault	If true, only allowed depositors may deposit to this vault
managementFee	Management fees rate (multiplied by DENOMINATOR = $10^9$)
performanceFee	Performance fees rate (multiplied by DENOMINATOR = $10^9$)
depositCallbackAddress	Address of callback function after deposit (to make some actions by subvaults in responde to a deposit)
withdrawCallbackAddress	Address of callback function after deposit (to make some actions by subvaults in responde to a withdraw)

protocolPerVaultParams:

Parameter	Description
protocolFee	Protocol fees rate (multiplied by DENOMINATOR = $10^9$)

delayedProtocolParams:

Parameter	Description
managementFeeChargeDelay	The minimal interval between management fee charges, in seconds
oracle	Oracle for getting token prices in this Vault System

operatorParams:

Parameter	Description
disableDeposit	If true, disable deposit for all ERC20Root vaults