val read : Tezos_rpc.RPC_context.simple -> ?chain:chain -> ?block:block -> ?depth:int -> string list -> raw_context Tezos_base.TzPervasives.tzresult Lwt.t
val merkle_tree : Tezos_rpc.RPC_context.simple -> ?chain:chain -> ?block:block -> ?holey:bool -> string list -> merkle_tree option Tezos_base.TzPervasives.tzresult Lwt.t