module type S = sig
  open Crypto

  val sm_pubkey : eddsa_pub
  val sign_with_sm_key : string -> eddsa_sig
  val sign_with_signkey : pub:eddsa_pub -> string -> eddsa_sig
  val verify_with_master_key : eddsa_sig -> msg:string -> (unit, string) result
  val verify_with_sm_key : eddsa_sig -> msg:string -> (unit, string) result

  val verify_with_signkey :
    pub:eddsa_pub -> eddsa_sig -> msg:string -> (unit, string) result

  val get_signkeys : unit -> Signkey.t list
  val get_denominations : unit -> Denomination.t list
  val get_future_signkeys : unit -> Api.FutureSignKey.t list
  val get_future_denominations : unit -> Api.FutureDenom.t list
  val find_signkey : eddsa_pub -> Signkey.t option
  val find_denomination : denom_hash -> Denomination.t option

  val certify_future_signkey :
    eddsa_pub ->
    Signatures.ExchangeSigningKeyValidity.t ->
    (unit, string) result

  val certify_future_denomination :
    denom_hash -> Signatures.DenominationKeyValidity.t -> (unit, string) result

  val revoke_signkey :
    eddsa_pub ->
    Signatures.MasterSigningKeyRevocation.t ->
    (unit, string) result

  val revoke_denomination :
    denom_hash ->
    Signatures.MasterDenominationKeyRevocation.t ->
    (unit, string) result

  val save : unit -> (unit, string) result
end

module Make (_ : Pg.CONN) : S