Options.Raw
type t = {
sender : string;
token_id : string;
receiver : string;
valid_until : string option;
memo : string option;
}
val to_yojson : t -> Yojson.Safe.t
val of_yojson : Yojson.Safe.t -> t Ppx_deriving_yojson_runtime.error_or
val _ : Yojson.Safe.t -> t Ppx_deriving_yojson_runtime.error_or