Contracts, components and interactions

Actors

We have the following actors in the system:

• Lido/Mellow multisig - admin multisig that manages the vaults
• Stake Bot - external bot that manages pushing ether to Obol in Lido
• Curator Admin - can convert some WETH to WstETH on the vault balance (in case of excessive WETH on the vault not earning yield). A safe multisig by governed by the Curator.
• Curator Operator - Curator bot / multisig for processing withdrawals.

Roles

There are two types of role mechanics in the system:

• DefaultAccessControl role mechanics
• ManagedValidator role mechanics

DefaultAccessControl

DefaultAccessControl is used in three contracts:

• Vault
• VaultConfigurator
• SimpleDVTStakingStrategy

Vault and SimpleDVTStakingStrategy have independent set of roles, VaultConfigurator inherits it’s role model from Vault.

DefaultAccessControl has 3 roles: ADMIN, ADMIN_DELEGATE, OPERATOR.