public function testCreateInstance()
{
$ecAdapter = Bitcoin::getEcAdapter();
$params = new Params($ecAdapter->getMath());
$consensus = new Consensus($ecAdapter->getMath(), $params);
$proofOfWork = new ProofOfWork($ecAdapter->getMath(), $params);
$check = new HeaderCheck($consensus, $ecAdapter, $proofOfWork);
$header = BlockHeaderFactory::fromHex($this->getGenesisHex());
$hash = $header->getHash();
$this->assertNoException(function () use($check, $hash, $header) {
$check->check($hash, $header, false);
});
$this->assertNoException(function () use($check, $hash, $header) {
$check->check($hash, $header, true);
});
$badHeader = new BlockHeader($header->getVersion(), $header->getPrevBlock(), $header->getMerkleRoot(), $header->getTimestamp(), $header->getBits(), 1);
$this->assertException(function () use($check, $badHeader) {
$hash = $badHeader->getHash();
$check->check($hash, $badHeader, true);
});
}
/**
* @param TransactionInterface|null $coinbaseTx
* @return Block
* @throws \BitWasp\Bitcoin\Exceptions\MerkleTreeEmpty
*/
public function run(TransactionInterface $coinbaseTx = null)
{
$nonce = '0';
$maxNonce = $this->math->pow(2, 32);
// Allow user supplied transactions
if ($coinbaseTx == null) {
$coinbaseTx = new Transaction();
$coinbaseTx->getInputs()->addInput(new TransactionInput('0000000000000000000000000000000000000000000000000000000000000000', 4294967295.0));
$coinbaseTx->getOutputs()->addOutput(new TransactionOutput(5000000000.0, $this->script));
}
$inputs = $coinbaseTx->getInputs();
$found = false;
$usingDiff = $this->lastBlockHeader->getBits();
$diff = new Difficulty($this->math);
$target = $diff->getTarget($usingDiff);
while (false === $found) {
// Set coinbase script, and build Merkle tree & block header.
$inputs->getInput(0)->setScript($this->getCoinbaseScriptBuf());
$transactions = new TransactionCollection(array_merge(array($coinbaseTx), $this->transactions->getTransactions()));
$merkleRoot = new MerkleRoot($this->math, $transactions);
$merkleHash = $merkleRoot->calculateHash();
$header = new BlockHeader($this->version, $this->lastBlockHeader->getBlockHash(), $merkleHash, $this->timestamp, $usingDiff, '0');
$t = microtime(true);
// Loop through all nonces (up to 2^32). Restart after modifying extranonce.
while ($this->math->cmp($header->getNonce(), $maxNonce) <= 0) {
$header->setNonce($this->math->add($header->getNonce(), '1'));
$hash = (new Parser())->writeBytes(32, Hash::sha256d($header->getBuffer()), true)->getBuffer();
if ($this->math->cmp($hash->getInt(), $target) <= 0) {
$block = new Block($this->math, $header, $transactions);
return $block;
}
if ($this->report && $this->math->cmp($this->math->mod($header->getNonce(), 100000), '0') == 0) {
$time = microtime(true) - $t;
$khash = $nonce / $time / 1000;
echo "extraNonce[{$this->extraNonce}] nonce[{$nonce}] time[{$time}] khash/s[{$khash}] \n";
}
}
// Whenever we exceed 2^32, increment extraNonce and reset $nonce
$this->extraNonce++;
$nonce = '0';
}
}
/**
* @param string $blockhash
* @return \BitWasp\Bitcoin\Block\Block
*/
public function getblock($blockhash)
{
$blockArray = $this->client->execute('getblock', [$blockhash, true]);
$this->checkNotNull($blockArray);
// Establish batch query for loading transactions
$txs = [];
if (count($blockArray['tx']) > 0) {
$this->client->batch();
foreach ($blockArray['tx'] as $txid) {
$this->client->execute('getrawtransaction', array($txid));
}
$result = $this->client->send();
// Build the transactions
$txs = array_map(function ($value) {
return TransactionFactory::fromHex($value);
}, $result);
}
// Build block header
$header = new BlockHeader($blockArray['version'], @$blockArray['previousblockhash'], $blockArray['merkleroot'], $blockArray['time'], Buffer::hex($blockArray['bits']), $blockArray['nonce']);
if (isset($blockArray['nextblockhash'])) {
$header->setNextBlock($blockArray['nextblockhash']);
}
return new Block(Bitcoin::getMath(), $header, new TransactionCollection($txs));
}
