DisallowFutureRange is an additional check for validating time ranges which disallows ranges which are in the future.

DisallowZeroRange is an additional check for validating time ranges which disallows the start time and end time to be equal.

GetOutPointFromString gets the channel outpoint from a string.

ValidateTimeRange checks that a start time is before an end time.

ValidateRangeOption is an additional check that can be applied when validating time ranges.