/**
* @param Container $container
*/
public function register(Container $container)
{
$headers = $this->node->headers();
$headers->on('headers', function (HeadersBatch $batch) use($container) {
/** @var DbInterface $db */
$db = $container['db'];
/** @var DebugInterface $debug */
$debug = $container['debug'];
if (count($batch->getIndices()) > 0) {
$first = $batch->getIndices()[0];
$prevIndex = $db->fetchIndex($first->getHeader()->getPrevBlock());
$versionInfo = $db->findSuperMajorityInfoByHash($prevIndex->getHash());
$forks = new Forks($this->params, $prevIndex, $versionInfo);
$first = $forks->toArray();
$changes = [];
foreach ($batch->getIndices() as $index) {
$forks->next($index);
$new = $forks->toArray();
if ($first !== $new) {
$changes[] = [$index, $first, $new];
$first = $new;
}
}
foreach ($changes as $change) {
/** @var BlockIndexInterface $index */
list($index, $first, $features) = $change;
$debug->log('fork.new', ['hash' => $index->getHash()->getHex(), 'height' => $index->getHeight(), 'old' => $first, 'features' => $features]);
}
}
});
}
/**
* @param ChainAccessInterface $chain
* @param BlockIndexInterface $index
* @param BlockIndexInterface $prevIndex
* @param Forks $forks
* @return $this
*/
public function checkContextual(ChainAccessInterface $chain, BlockIndexInterface $index, BlockIndexInterface $prevIndex, Forks $forks)
{
$work = $this->getWorkRequired($chain, $prevIndex);
$header = $index->getHeader();
if ($this->math->cmp(gmp_init($header->getBits(), 10), gmp_init($work, 10)) != 0) {
throw new \RuntimeException('Headers::CheckContextual(): invalid proof of work : ' . $header->getBits() . '? ' . $work);
}
if ($header->getVersion() < $forks->getMajorityVersion()) {
echo $index->getHash()->getHex() . PHP_EOL;
echo "Heaader: " . $header->getVersion() . "\nMajority: " . $forks->getMajorityVersion() . PHP_EOL;
throw new \RuntimeException('Rejected version');
}
return $this;
}
/**
* @param HeaderChainViewInterface $headersView
* @param BlockIndexInterface $index
* @return Forks
*/
public function prepareForks(HeaderChainViewInterface $headersView, BlockIndexInterface $index)
{
if ($this->forks instanceof Forks && $this->forks->isNext($index)) {
$forks = $this->forks;
} else {
$versionInfo = $this->db->findSuperMajorityInfoByHash($index->getHeader()->getPrevBlock());
$forks = $this->forks = new Forks($this->consensus->getParams(), $headersView->getLastBlock(), $versionInfo);
}
return $forks;
}
/**
* @param BlockHeaderInterface[] $headers
* @return HeadersBatch
*/
public function prepareBatch(array $headers)
{
$countHeaders = count($headers);
if (0 === $countHeaders) {
return new HeadersBatch($this->chains->best($this->math), []);
}
$bestPrev = null;
$firstUnknown = null;
$hashStorage = new HashStorage();
foreach ($headers as $i => &$head) {
if ($this->chains->isKnownHeader($head->getPrevBlock())) {
$bestPrev = $head->getPrevBlock();
}
$hash = Hash::sha256d($head->getBuffer())->flip();
$hashStorage->attach($head, $hash);
if ($firstUnknown === null && !$this->chains->isKnownHeader($hash)) {
$firstUnknown = $i;
}
}
if (!$bestPrev instanceof BufferInterface) {
throw new \RuntimeException('Headers::accept(): Unknown start header');
}
$view = $this->chains->isTip($bestPrev);
if ($view === false) {
throw new \RuntimeException('Headers::accept(): Unhandled fork');
}
$prevIndex = $view->getIndex();
$access = $this->chains->access($view);
$batch = [];
if ($firstUnknown !== null) {
$versionInfo = $this->db->findSuperMajorityInfoByView($view);
$forks = new Forks($this->consensus->getParams(), $prevIndex, $versionInfo);
for ($i = $firstUnknown; $i < $countHeaders; $i++) {
/**
* @var BufferInterface $hash
* @var BlockHeaderInterface $header
*/
$header = $headers[$i];
$hash = $hashStorage[$header];
$this->headerCheck->check($hash, $header);
$index = $this->getNextIndex($hash, $prevIndex, $header);
$forks->next($index);
$this->headerCheck->checkContextual($access, $index, $prevIndex, $forks);
$batch[] = $index;
$prevIndex = $index;
}
}
return new HeadersBatch($view, $batch);
}
