Lwt_utils_unix.Jsonval read_file :
string ->
Data_encoding.json Tezos_error_monad.Error_monad.tzresult Lwt.tLoads a JSON file in memory
val write_file :
string ->
Data_encoding.json ->
unit Tezos_error_monad.Error_monad.tzresult Lwt.t(Over)write a JSON file from in memory data