Mavryk_protocol_environment_demo_counter.Timelocktype chest = Mavryk_crypto.Timelock.chestval chest_encoding : chest Data_encoding.ttype chest_key = Mavryk_crypto.Timelock.chest_keyval chest_key_encoding : chest_key Data_encoding.tval open_chest : chest -> chest_key -> time:int -> opening_resultval get_plaintext_size : chest -> int