private function updateGreatestWork()
{
$segments = $this->segments;
if (count($this->segments) > 1) {
usort($segments, new ChainWorkComparator(Bitcoin::getMath()));
}
$best = end($segments);
if (is_null($this->best) || $this->best instanceof ChainSegment && $this->best->getLast() !== $best->getLast()) {
$this->best = $best;
}
}
/**
* @return int|string
*/
public function count()
{
return $this->segment->getLast()->getHeight();
}
/**
* @param ChainSegment $a
* @param ChainSegment $b
* @return int
*/
public function __invoke(ChainSegment $a, ChainSegment $b)
{
return $this->math->cmp(gmp_init($a->getLast()->getWork(), 10), gmp_init($b->getLast()->getWork(), 10));
}
