Real (lib.Lib.Construction.Metadata.Real)

val handle : 
  graphql_uri:Uri.t ->
  env:Get_options_metadata.t Env.T(Async.Deferred.Result).t ->
  Rosetta_models.Construction_metadata_request.t ->
  ( Rosetta_models.Construction_metadata_response.t, Rosetta_lib.Errors.t )
    Async.Deferred.Result.t