babe_lottery.hpp

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#ifndef KAGOME_BABE_LOTTERY_HPP
#define KAGOME_BABE_LOTTERY_HPP

#include <optional>

#include "consensus/babe/types/epoch_descriptor.hpp"
#include "crypto/sr25519_types.hpp"
#include "primitives/babe_configuration.hpp"

namespace kagome::consensus {
  struct BabeLottery {
    virtual ~BabeLottery() = default;

    virtual void changeEpoch(const EpochDescriptor &epoch,
                             const Randomness &randomness,
                             const Threshold &threshold,
                             const crypto::Sr25519Keypair &keypair) = 0;

    virtual EpochDescriptor getEpoch() const = 0;

    virtual std::optional<crypto::VRFOutput> getSlotLeadership(
        primitives::BabeSlotNumber slot) const = 0;

    virtual crypto::VRFOutput slotVrfSignature(
        primitives::BabeSlotNumber slot) const = 0;

    virtual std::optional<primitives::AuthorityIndex> secondarySlotAuthor(
        primitives::BabeSlotNumber slot,
        primitives::AuthorityListSize authorities_count,
        const Randomness &randomness) const = 0;
  };
}  // namespace kagome::consensus

#endif  // KAGOME_BABE_LOTTERY_HPP