The distance between bridged chain headers, that may be submitted for free. The
first free header is header number zero, the next one is header number
FreeHeadersInterval::get() or any of its descendant if that header has not
been submitted. In other words, interval between free headers should be at least
FreeHeadersInterval.
The distance between bridged chain headers, that may be submitted for free. The first free header is header number zero, the next one is header number
FreeHeadersInterval::get()or any of its descendant if that header has not been submitted. In other words, interval between free headers should be at leastFreeHeadersInterval.