Contracts Architecture

Upgradability:

• Immutable - the contract cannot be upgraded
• Migratable - the contract can be upgraded by their owners to newer versions provided by its factory
• Not Specified - the contract may or may not be upgradeable

Accessibility:

• VaultFactory / DelegatorFactory / SlasherFactory - Ownable, their owners can whitelist new versions/types
• Vault - Ownable, its owner can migrate it to newer versions
• Vault / Delegator / Slasher - have an AccessControl (roles mechanic) for providing granularity across accessibility risks
• Collateral / StakerRewards / OperatorRewards / Burner - can have any accessibility