/**
* Initialize the block storage with genesis and chain
* @param BlockHeaderInterface $header
*/
public function init(BlockHeaderInterface $header)
{
$hash = $header->getHash();
try {
$this->db->fetchIndex($hash);
} catch (\Exception $e) {
$this->db->createIndexGenesis($header);
}
}
/**
* @param ChainState $state
* @param BlockHeaderInterface $header
* @return BlockIndex
*/
public function accept(ChainState $state, BlockHeaderInterface $header)
{
$hash = $header->getHash();
if ($state->getChain()->containsHash($hash)) {
// todo: check for rejected block
return $this->db->fetchIndex($hash);
}
$prevIndex = $state->getChain()->getIndex();
$index = $this->headerCheck->check($header)->checkContextual($state, $header)->makeIndex($prevIndex, $header);
$this->db->insertIndexBatch($prevIndex, [$index]);
$state->getChain()->updateTip($index);
return $index;
}
/**
* @param BlockIndex $prevIndex
* @param BlockHeaderInterface $header
* @return BlockIndex
*/
public function makeIndex(BlockIndex $prevIndex, BlockHeaderInterface $header)
{
return new BlockIndex($header->getHash()->getHex(), $this->math->add($prevIndex->getHeight(), 1), $this->math->add($this->pow->getWork($header->getBits()), $prevIndex->getWork()), $header);
}
/**
* @param BlockHeaderInterface $header
* @return bool
* @throws \Exception
*/
public function checkHeader(BlockHeaderInterface $header)
{
return $this->check($header->getHash(), $header->getBits()->getInt());
}
/**
* Creates the Genesis block index
* @param BlockHeaderInterface $header
* @return bool
*/
public function createIndexGenesis(BlockHeaderInterface $header)
{
$stmtHeader = $this->dbh->prepare('INSERT INTO headerIndex (
hash, segment, height, work, version, prevBlock, merkleRoot, nBits, nTimestamp, nNonce
) VALUES (
:hash, :segment, :height, :work, :version, :prevBlock, :merkleRoot, :nBits, :nTimestamp, :nNonce
)
');
if ($stmtHeader->execute(array('hash' => $header->getHash()->getBinary(), 'segment' => 0, 'height' => 0, 'work' => 0, 'version' => $header->getVersion(), 'prevBlock' => $header->getPrevBlock()->getBinary(), 'merkleRoot' => $header->getMerkleRoot()->getBinary(), 'nBits' => $header->getBits(), 'nTimestamp' => $header->getTimestamp(), 'nNonce' => $header->getNonce()))) {
return true;
}
throw new \RuntimeException('Failed to update insert Genesis block index!');
}
