Proto/env: export Ed25519.Signature.zero

src/lib_crypto/ed25519.ml

@@ -182,6 +182,7 @@ module Signature = struct
 
   let to_bytes x = x
   let size = Sign.bytes
+  let zero = MBytes.init size '\000'
 
   let () =
     Base58.check_encoded_prefix b58check_encoding "edsig" 99

src/lib_crypto/ed25519.mli

@@ -81,6 +81,8 @@ module Signature : sig
 
   val size: int
 
+  val zero: t
+
   (** Check a signature *)
   val check: Public_key.t -> t -> MBytes.t -> bool
 

src/lib_protocol_environment/sigs/v1/ed25519.mli

@@ -80,6 +80,8 @@ module Signature : sig
   (** Append a signature *)
   val append: Secret_key.t -> MBytes.t -> MBytes.t
 
+  val zero: t
+
 end
 
 val sign: Secret_key.t -> MBytes.t -> Signature.t