vrf_provider.hpp

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#ifndef KAGOME_CORE_CRYPTO_VRF_VRF_PROVIDER_HPP
#define KAGOME_CORE_CRYPTO_VRF_VRF_PROVIDER_HPP

#include <optional>

#include "common/buffer.hpp"
#include "crypto/sr25519_types.hpp"
#include "primitives/transcript.hpp"

namespace kagome::crypto {

  class VRFProvider {
   public:
    virtual ~VRFProvider() = default;

    virtual Sr25519Keypair generateKeypair() const = 0;

    virtual std::optional<VRFOutput> sign(
        const common::Buffer &msg,
        const Sr25519Keypair &keypair,
        const VRFThreshold &threshold) const = 0;

    virtual VRFVerifyOutput verify(const common::Buffer &msg,
                                   const VRFOutput &output,
                                   const Sr25519PublicKey &public_key,
                                   const VRFThreshold &threshold) const = 0;

    virtual std::optional<VRFOutput> signTranscript(
        const primitives::Transcript &msg,
        const Sr25519Keypair &keypair,
        const VRFThreshold &threshold) const = 0;

    virtual std::optional<VRFOutput> signTranscript(
        const primitives::Transcript &msg,
        const Sr25519Keypair &keypair) const = 0;

    virtual VRFVerifyOutput verifyTranscript(
        const primitives::Transcript &msg,
        const VRFOutput &output,
        const Sr25519PublicKey &public_key,
        const VRFThreshold &threshold) const = 0;
  };
}  // namespace kagome::crypto

#endif  // KAGOME_CORE_CRYPTO_VRF_VRF_PROVIDER_HPP