/**
* @param BlockHeaderInterface $header
* @return bool
* @throws \Exception
*/
public function checkHeader(BlockHeaderInterface $header)
{
$math = $this->math;
$target = $this->difficulty->getTarget($header->getBits());
if ($math->cmp($target, 0) == 0 || $math->cmp($target, $this->limit()) > 0) {
throw new \Exception('nBits below minimum work');
}
$hashInt = $math->hexDec($header->getBlockHash());
if ($math->cmp($hashInt, $target) > 0) {
throw new \Exception("Hash doesn't match nBits");
}
return true;
}
/**
* Given an ancestor height, and a list of hashes in the fork, use this
* information to compare the work, and if necessary, commit a reorg.
*
* @param int $ancestorHeight
* @param array $forkBlockHashes
* @return bool
* @throws \Exception
*/
public function processFork($ancestorHeight, array $forkBlockHashes)
{
$blocks = $this->blocks();
$index = $this->index();
/** @var \BitWasp\Bitcoin\Block\BlockHeaderInterface[] $chainHeaders */
$chainHeaders = [];
$chainHeight = $index->height()->height();
for ($i = $ancestorHeight; $i < $chainHeight; $i++) {
$chainHeaders[] = $blocks->fetch($index->hash()->fetch($i))->getHeader();
}
/** @var \BitWasp\Bitcoin\Block\BlockHeaderInterface[] $forkBlocks */
$forkBlocks = [];
$forkHeaders = [];
foreach ($forkBlockHashes as $hash) {
$block = $blocks->fetch($hash);
$forkBlocks[] = $block;
$forkHeaders[] = $block->getHeader();
}
// Only recalculate BlockIndex values if fork has greater work than chain blocks since ancestor
if ($this->difficulty->compareWork($forkHeaders, $chainHeaders) > 0) {
$index->reorg($ancestorHeight, $forkHeaders);
return true;
}
return false;
}
/**
* @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';
}
}
<?php
require_once __DIR__ . "/../vendor/autoload.php";
use BitWasp\Bitcoin\Address\AddressFactory;
use BitWasp\Bitcoin\Rpc\RpcFactory;
use BitWasp\Bitcoin\Chain\Difficulty;
use BitWasp\Bitcoin\Math\Math;
use BitWasp\Bitcoin\Network\NetworkFactory;
use BitWasp\Bitcoin\Bitcoin;
use BitWasp\Bitcoin\Script\OutputScriptFactory;
use BitWasp\Bitcoin\Script\ScriptFactory;
use BitWasp\Buffertools\Buffer;
use willgriffin\MariaInterface\MariaInterface;
$configFile = count($argv) > 1 ? $argv[1] : false;
$x = count($argv) > 2 ? intval($argv[2]) : 1;
$math = new Math();
$difficulty = new Difficulty($math);
if (file_exists($configFile)) {
$config = (object) parse_ini_file($configFile);
//$currency = Main::getCurrency($currencyName);
$db = new MariaInterface(["host" => $config->dbhost, "user" => $config->dbuser, "pass" => $config->dbpass, "port" => $config->dbport, "name" => $config->dbname]);
$bitcoind = RpcFactory::bitcoind($config->rpchost, $config->rpcport, $config->rpcuser, $config->rpcpass);
$network = NetworkFactory::create($config->magic_byte, $config->magic_p2sh_byte, $config->private_key_byte)->setHDPubByte($config->hd_pub_byte)->setHDPrivByte($config->hd_priv_byte)->setNetMagicBytes($config->net_magic_bytes);
Bitcoin::setNetwork($network);
$nextBlockHash = $bitcoind->getblockhash($x);
do {
echo "Block {$x}\n";
$blockhash = $nextBlockHash;
$block = $bitcoind->getblock($blockhash);
$blockHeader = $block->getHeader();
$blockBits = $blockHeader->getBits();
$blockTime = $blockHeader->getTimestamp();