/**
* @param Parser $parser
* @return Transaction
* @throws \BitWasp\Buffertools\Exceptions\ParserOutOfRange
* @throws \Exception
*/
public function fromParser(Parser &$parser)
{
$parse = $this->getTemplate()->parse($parser);
$version = $parse[0];
$txIns = $parse[1];
$txOuts = $parse[2];
$locktime = $parse[3];
$tx = new Transaction($version, null, null, $locktime);
$tx->getInputs()->addInputs($txIns);
$tx->getOutputs()->addOutputs($txOuts);
return $tx;
}
/**
* @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 "../vendor/autoload.php";
use BitWasp\Bitcoin\Bitcoin;
use BitWasp\Bitcoin\Key\PrivateKeyFactory;
use BitWasp\Bitcoin\Script\ScriptFactory;
use BitWasp\Bitcoin\Transaction\Transaction;
use BitWasp\Bitcoin\Transaction\TransactionInput;
use BitWasp\Bitcoin\Transaction\TransactionOutput;
use BitWasp\Bitcoin\Transaction\TransactionBuilder;
use BitWasp\Bitcoin\Transaction\TransactionFactory;
$ecAdapter = Bitcoin::getEcAdapter();
// Two users independently create private keys.
$pk1 = PrivateKeyFactory::fromHex('421c76d77563afa1914846b010bd164f395bd34c2102e5e99e0cb9cf173c1d87');
$pk2 = PrivateKeyFactory::fromHex('f7225388c1d69d57e6251c9fda50cbbf9e05131e5adb81e5aa0422402f048162');
// They exchange public keys, and a multisignature address is made.
$redeemScript = ScriptFactory::multisig(2, [$pk1->getPublicKey(), $pk2->getPublicKey()]);
$outputScript = $redeemScript->getOutputScript();
// The address is funded with a transaction (fake, for the purposes of this script).
// You would do getrawtransaction normally
$spendTx = new Transaction();
$spendTx->getInputs()->addInput(new TransactionInput('4141414141414141414141414141414141414141414141414141414141414141', 0));
$spendTx->getOutputs()->addOutput(new TransactionOutput(50, $outputScript));
// One party wants to spend funds. He creates a transaction spending the funding tx to his address.
$builder = new TransactionBuilder($ecAdapter);
$builder->spendOutput($spendTx, 0)->payToAddress($pk1->getAddress(), 50)->signInputWithKey($pk1, $outputScript, 0, $redeemScript)->signInputWithKey($pk2, $outputScript, 0, $redeemScript);
$rawTx = $builder->getTransaction()->getHex();
echo "Fully signed transaction: " . $builder->getTransaction()->getHex() . "\n";
