Struct forest_filecoin::beacon::drand::DrandBeacon

pub struct DrandBeacon {
    servers: Vec<Url>,
    hash: String,
    network: DrandNetwork,
    public_key: Vec<u8>,
    interval: u64,
    drand_gen_time: u64,
    fil_gen_time: u64,
    fil_round_time: u64,
    verified_beacons: RwLock<LruCache<u64, BeaconEntry>>,
}

Drand randomness beacon that can be used to generate randomness for the Filecoin chain. Primary use is to satisfy the Beacon trait.

Fields

servers: Vec<Url>

hash: String

network: DrandNetwork

public_key: Vec<u8>

interval: u64

Interval between beacons, in seconds.

drand_gen_time: u64

fil_gen_time: u64

fil_round_time: u64

verified_beacons: RwLock<LruCache<u64, BeaconEntry>>

Keeps track of verified beacon entries.

Implementations

impl DrandBeacon

pub fn new(genesis_ts: u64, interval: u64, config: &DrandConfig<'_>) -> Self

Construct a new DrandBeacon.

Trait Implementations

impl Beacon for DrandBeacon

fn network(&self) -> DrandNetwork

Gets the drand network

fn verify_entries<'a>( &self, entries: &'a [BeaconEntry], prev: &'a BeaconEntry, ) -> Result<bool, Error>

Verify beacon entries that are sorted by round.

fn entry<'life0, 'async_trait>( &'life0 self, round: u64, ) -> Pin<Box<dyn Future<Output = Result<BeaconEntry>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait,

Returns a BeaconEntry given a round. It fetches the BeaconEntry from a Drand node over gRPC In the future, we will cache values, and support streaming.

fn max_beacon_round_for_epoch( &self, network_version: NetworkVersion, fil_epoch: i64, ) -> u64

Returns the most recent beacon round for the given Filecoin chain epoch.