Esempio n. 1
0
 /**
  * @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';
     }
 }
Esempio n. 2
0
 /**
  * @param Buffer $bits
  * @return int|string
  */
 public function getWork(Buffer $bits)
 {
     return bcdiv($this->math->pow(2, 256), $this->getTarget($bits));
 }
Esempio n. 3
0
 /**
  * {@inheritdoc}
  * @see \BitWasp\Bitcoin\Chain\DifficultyInterface::getWork()
  */
 public function getWork(Buffer $bits)
 {
     $work = bcdiv($this->math->pow(2, 256), $this->getTargetHash($bits)->getInt());
     return $work;
 }