use types::{BeaconBlock, EthSpec, Signature, Slot};
#[derive(Debug, PartialEq, Clone)]
pub enum BeaconNodeError {
    RemoteFailure(String),
    DecodeFailure,
}

#[derive(Debug, PartialEq, Clone)]
pub enum PublishOutcome {
    Valid,
    InvalidBlock(String),
    InvalidAttestation(String),
}

/// Defines the methods required to produce and publish blocks on a Beacon Node. Abstracts the
/// actual beacon node.
pub trait BeaconNodeBlock: Send + Sync {
    /// Request that the node produces a block.
    ///
    /// Returns Ok(None) if the Beacon Node is unable to produce at the given slot.
    fn produce_beacon_block<T: EthSpec>(
        &self,
        slot: Slot,
        randao_reveal: &Signature,
    ) -> Result<Option<BeaconBlock<T>>, BeaconNodeError>;

    /// Request that the node publishes a block.
    ///
    /// Returns `true` if the publish was successful.
    fn publish_beacon_block<T: EthSpec>(
        &self,
        block: BeaconBlock<T>,
    ) -> Result<PublishOutcome, BeaconNodeError>;
}