struct InvalidRBACInfo {
   /// Hash of the transaction which contains this RBAC metadata
   txn_id: TransactionId
   /// Block's slot number which contain the transaction with RBAC metadata
  slot: Slot,
  report: common::types::generic::error_msg::ErrorMessage
}

pub struct ChainInfo {
    /// A RBAC registration chain.
    pub chain: RegistrationChain,
    /// The latest persistent transaction ID of the chain.
    pub last_persistent_txn: Option<TransactionId>,
    /// The latest volatile transaction ID of the chain.
    pub last_volatile_txn: Option<TransactionId>,
    /// A slot number of the latest persistent registration.
    pub last_persistent_slot: Slot,
    /// A list of invalid RBAC registrations
    pub invalids: Vec<InvalidRBACInfo>,
}