Reports each signature, transaction and API mutation as it moves from
waiting to success, or to error when it fails. The SDK awaits every call.
An error the callback itself throws is not a failed step: the SDK call
rejects with it and no error step follows.
Reports each signature, transaction and API mutation as it moves from
waitingtosuccess, or toerrorwhen it fails. The SDK awaits every call. An error the callback itself throws is not a failed step: the SDK call rejects with it and noerrorstep follows.