/**
* @param int $height
* @return BufferInterface
*/
public function getHashFromHeight($height)
{
if ($height > $this->position) {
throw new \RuntimeException('GuidedChainCache: index at this height (' . $height . ') not known');
}
return $this->view->getHashFromHeight($height);
}
/**
* @param ChainViewInterface $headerChain
* @param BufferInterface $startHash
* @throws \RuntimeException
* @throws \Exception
* @return Inventory[]
*/
private function relativeNextInventory(ChainViewInterface $headerChain, BufferInterface $startHash)
{
if (!$headerChain->containsHash($startHash)) {
throw new \RuntimeException('Hash not found in this chain');
}
$startHeight = $headerChain->getHeightFromHash($startHash) + 1;
$stopHeight = min($startHeight + self::DOWNLOAD_AMOUNT, $headerChain->getIndex()->getHeight());
$nInFlight = count($this->inFlight);
$request = [];
for ($i = $startHeight; $i < $stopHeight && $nInFlight < self::MAX_IN_FLIGHT; $i++) {
$request[] = Inventory::block($headerChain->getHashFromHeight($i));
$nInFlight++;
}
return $request;
}
/**
* @param int $height
* @return BlockIndexInterface
*/
public function fetchAncestor($height)
{
return $this->fetchIndex($this->view->getHashFromHeight($height));
}
