nonce_storage.mli
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(** This module provides types and functions to manipulate nonces.
A nonce is a byte sequence of fixed length, which is supposed to be random
and used only once, provided by a block producer and used to generate a
random seed (see {!module:Seed_repr}). *)
type t = Seed_repr.nonce
type nonce = t
type error +=
| Too_late_revelation
| Too_early_revelation
| Already_revealed_nonce
| Inconsistent_nonce
val encoding : nonce Data_encoding.t
type unrevealed = Storage.Seed.unrevealed_nonce = {
nonce_hash : Nonce_hash.t;
delegate : Signature.Public_key_hash.t;
}
type status = Unrevealed of unrevealed | Revealed of Seed_repr.nonce
val get : Raw_context.t -> Level_repr.t -> status tzresult Lwt.t
type nonce_presence = No_nonce_expected | Nonce_expected of status
val check : Raw_context.t -> Level_repr.t -> nonce_presence tzresult Lwt.t
val record_hash : Raw_context.t -> unrevealed -> Raw_context.t tzresult Lwt.t
(** Checks that a nonce revelation operation can be safely applied.
@return [Error Too_early_revelation] if the current cycle is the
cycle 0 or if the previous cycle is lesser than the cycle of the
input level.
@return [Error Too_late_revelation] if the previous cycle is
greater than the cycle of the input level. This error is also
returned if the current level cycle position is greater or equal to
the nonce revelation threshold.
@return [Error Already_revealed_nonce] if a nonce is already
revealed in the context for the input level.
@return [Error Inconsistent_nonce] if the hash of the input nonce
does not correspond to the nonce recover from the context for the
given level. *)
val check_unrevealed :
Raw_context.t -> Level_repr.t -> nonce -> unit tzresult Lwt.t
val reveal :
Raw_context.t -> Level_repr.t -> nonce -> Raw_context.t tzresult Lwt.t
val of_bytes : bytes -> nonce tzresult
val hash : nonce -> Nonce_hash.t
val check_hash : nonce -> Nonce_hash.t -> bool