/**
* @param ChainState $state
* @param ChainCache $chainView
* @param Peer $peer
* @param Inventory[] $items
*/
public function advertised(ChainState $state, ChainCache $chainView, Peer $peer, array $items)
{
$chain = $state->getChain();
$fetch = [];
$lastUnknown = null;
foreach ($items as $inv) {
$hash = $inv->getHash();
if ($chain->containsHash($hash)) {
if (!$chainView->containsHash($hash)) {
$fetch[] = $inv;
}
} else {
$lastUnknown = $hash;
}
}
if (null !== $lastUnknown) {
echo "send headers\n";
$peer->getheaders($state->getHeadersLocator($lastUnknown));
$this->peerState->fetch($peer)->updateBlockAvailability($state, $lastUnknown);
}
if (count($fetch) > 0) {
echo 'SEND GETDATA:' . count($fetch) . '\\n';
$peer->getdata($fetch);
}
}
/**
* @param Buffer $hash
* @return BlockIndex
*/
public function fetchIndex(Buffer $hash)
{
if (!$this->chainCache->containsHash($hash)) {
throw new \RuntimeException('Index by this hash not known');
}
return $this->headers->fetch($hash);
}