/**
* @param int $sighashType
* @param int $inputToSign
* @return Buffer|BufferInterface
*/
public function hashOutputs($sighashType, $inputToSign)
{
if (($sighashType & 0x1f) !== SigHash::SINGLE && ($sighashType & 0x1f) != SigHash::NONE) {
$binary = '';
foreach ($this->transaction->getOutputs() as $output) {
$binary .= $output->getBinary();
}
return Hash::sha256d(new Buffer($binary));
} elseif (($sighashType & 0x1f) == SigHash::SINGLE && $inputToSign < count($this->transaction->getOutputs())) {
return Hash::sha256($this->transaction->getOutput($inputToSign)->getBuffer());
}
return new Buffer('', 32);
}
/**
* Create an input for this transaction spending $tx's output, $outputToSpend.
*
* @param TransactionInterface $tx
* @param $outputToSpend
* @return $this
*/
public function spendOutput(TransactionInterface $tx, $outputToSpend)
{
// Check TransactionOutput exists in $tx
$tx->getOutputs()->getOutput($outputToSpend);
$this->addInput(new TransactionInput($tx->getTransactionId(), $outputToSpend));
return $this;
}
/**
* @param TransactionInterface $tx
*/
private function saveOutputs(TransactionInterface $tx)
{
$txid = $tx->getTransactionId();
$vout = 0;
foreach ($tx->getOutputs()->getOutputs() as $output) {
$this->contents->save($this->cacheIndex($txid, $vout), new Utxo($txid, $vout++, $output));
}
$this->size += $vout;
}
/**
* @param TransactionInterface $transaction
*/
private function processTransaction(TransactionInterface $transaction)
{
$results = [];
$nOut = count($transaction->getOutputs());
for ($i = 0; $i < $nOut; $i++) {
$output = $transaction->getOutput($i);
$script = $output->getScript()->getBinary();
if (!isset($results[$script])) {
$results[$script] = $output->getValue();
} else {
$results[$script] += $output->getValue();
}
}
// Compare results to known contracts
foreach ($this->contracts as $contract) {
$requirements = $contract['requirements'];
$rCount = count($requirements);
$have = 0;
foreach ($requirements as $script => $value) {
if (isset($results[$script])) {
echo 'pmt';
if ($results[$script] >= $value) {
$have++;
}
}
}
if ($have > 0) {
if ($have < $rCount) {
$command = 'tx.partial';
} else {
$command = 'tx.complete';
}
$this->listener->send(json_encode(['slug' => $contract['slug'], 'command' => $command, 'tx' => $transaction->getHex()]));
}
}
}
/**
* @param TransactionInterface $transaction
* @return string
*/
public function serialize(TransactionInterface $transaction)
{
return $this->getTemplate()->write([$transaction->getVersion(), $transaction->getInputs()->getInputs(), $transaction->getOutputs()->getOutputs(), $transaction->getLockTime()]);
}
/**
* @param TransactionInterface $transaction
* @return BufferInterface
*/
public function serialize(TransactionInterface $transaction)
{
$math = Bitcoin::getMath();
$int8le = new Int8($math, ByteOrder::LE);
$int32le = new Int32($math, ByteOrder::LE);
$uint32le = new Uint32($math, ByteOrder::LE);
$varint = new VarInt($math, ByteOrder::LE);
$vector = new Vector($varint, function () {
});
$binary = $int32le->write($transaction->getVersion());
$flags = 0;
if (!$transaction->getWitnesses()->isNull()) {
$flags |= 1;
}
if ($flags) {
$binary .= $int8le->write(0);
$binary .= $int8le->write($flags);
}
$binary .= $vector->write($transaction->getInputs()->all());
$binary .= $vector->write($transaction->getOutputs()->all());
if ($flags & 1) {
foreach ($transaction->getWitnesses() as $witness) {
$binary .= $witness->getBuffer()->getBinary();
}
}
$binary .= $uint32le->write($transaction->getLockTime());
return new Buffer($binary);
}
/**
* @param TransactionInterface $transaction
* @return array
*/
public function convertTransactionToArray(TransactionInterface $transaction)
{
$inputs = [];
foreach ($transaction->getInputs() as $input) {
$inputs[] = $this->convertTxinToArray($input);
}
$outputs = [];
foreach ($transaction->getOutputs() as $output) {
$outputs[] = $this->convertTxoutToArray($output);
}
$buf = $transaction->getBuffer()->getBinary();
return ['hash' => $transaction->getTxId()->getHex(), 'version' => $transaction->getVersion(), 'inputs' => $inputs, 'outputs' => $outputs, 'locktime' => $transaction->getLockTime(), 'raw' => bin2hex($buf), 'size' => strlen($buf)];
}
/**
* @param TransactionInterface $transaction
*/
public function __construct(TransactionInterface $transaction)
{
$this->transaction = $transaction;
$this->nInputs = count($this->transaction->getInputs());
$this->nOutputs = count($this->transaction->getOutputs());
}
/**
* @param UtxoView $view
* @param TransactionInterface $tx
* @param $spendHeight
* @return bool
*/
public function checkContextualInputs(UtxoView $view, TransactionInterface $tx, $spendHeight)
{
$valueIn = 0;
for ($i = 0; $i < count($tx->getInputs()); $i++) {
$utxo = $view->fetchByInput($tx->getInput($i));
/*if ($out->isCoinbase()) {
// todo: cb / height
if ($spendHeight - $out->getHeight() < $this->params->coinbaseMaturityAge()) {
return false;
}
}*/
$value = $utxo->getOutput()->getValue();
$valueIn = $this->math->add($value, $valueIn);
if (!$this->consensus->checkAmount($valueIn) || !$this->consensus->checkAmount($value)) {
throw new \RuntimeException('CheckAmount failed for inputs value');
}
}
$valueOut = 0;
foreach ($tx->getOutputs() as $output) {
$valueOut = $this->math->add($output->getValue(), $valueOut);
if (!$this->consensus->checkAmount($valueOut) || !$this->consensus->checkAmount($output->getValue())) {
throw new \RuntimeException('CheckAmount failed for outputs value');
}
}
if ($this->math->cmp($valueIn, $valueOut) < 0) {
throw new \RuntimeException('Value-in is less than value out');
}
$fee = $this->math->sub($valueIn, $valueOut);
if ($this->math->cmp($fee, 0) < 0) {
throw new \RuntimeException('Fee is less than zero');
}
if (!$this->consensus->checkAmount($fee)) {
throw new \RuntimeException('CheckAmount failed for fee');
}
return true;
}
/**
* @param TransactionInterface $tx
* @return Transaction
*/
public function fixTransaction(Peer $sender, TransactionInterface $tx, &$wasMalleated = false)
{
$c = count($tx->getInputs());
$new = new TransactionInputCollection();
for ($i = 0; $i < $c; $i++) {
$input = $tx->getInput($i);
$script = $input->getScript();
$classify = ScriptFactory::scriptSig()->classify($input->getScript());
$this->inputs++;
if ($classify->isPayToPublicKeyHash()) {
$parsed = $input->getScript()->getScriptParser()->parse();
$txSig = TransactionSignatureFactory::fromHex($parsed[0]);
$txSig = $this->fixSig($sender, $txSig, $wasMalleated);
$script = ScriptFactory::create()->push($txSig->getBuffer())->push($parsed[1])->getScript();
}
$new->addInput(new TransactionInput($input->getTransactionId(), $input->getVout(), $script, $input->getSequence()));
}
return new Transaction($tx->getVersion(), $new, $tx->getOutputs(), $tx->getLockTime());
}
/**
* @param TransactionInterface $tx
* @return bool
*/
public function isRelevantAndUpdate(TransactionInterface $tx)
{
$this->updateEmptyFull();
$found = false;
if ($this->isFull()) {
return true;
}
if ($this->isEmpty()) {
return false;
}
// Check if the txid hash is in the filter
$txHash = $tx->getTxId();
if ($this->containsData($txHash)) {
$found = true;
}
// Check for relevant output scripts. We add the outpoint to the filter if found.
foreach ($tx->getOutputs() as $vout => $output) {
$script = $output->getScript();
$parser = $script->getScriptParser();
foreach ($parser as $exec) {
if ($exec->isPush() && $this->containsData($exec->getData())) {
$found = true;
if ($this->isUpdateAll()) {
$this->insertOutPoint($tx->makeOutPoint($vout));
} else {
if ($this->isUpdatePubKeyOnly()) {
$type = ScriptFactory::scriptPubKey()->classify($script);
if ($type->isMultisig() || $type->isPayToPublicKey()) {
$this->insertOutPoint($tx->makeOutPoint($vout));
}
}
}
}
}
}
if ($found) {
return true;
}
foreach ($tx->getInputs() as $txIn) {
if ($this->containsOutPoint($txIn->getOutPoint())) {
return true;
}
$parser = $txIn->getScript()->getScriptParser();
foreach ($parser as $exec) {
if ($exec->isPush() > 0 && $this->containsData($exec->getData())) {
return true;
}
}
}
return false;
}
/**
* @param UtxoView $view
* @param TransactionInterface $tx
* @param int $spendHeight
* @return $this
*/
public function checkContextualInputs(UtxoView $view, TransactionInterface $tx, $spendHeight)
{
$valueIn = gmp_init(0);
for ($i = 0, $nInputs = count($tx->getInputs()); $i < $nInputs; $i++) {
/*if ($out->isCoinbase()) {
// todo: cb / height
if ($spendHeight - $out->getHeight() < $this->params->coinbaseMaturityAge()) {
return false;
}
}*/
$value = gmp_init($view->fetchByInput($tx->getInput($i))->getOutput()->getValue(), 10);
$valueIn = $this->math->add($valueIn, $value);
$this->consensus->checkAmount($valueIn);
}
$valueOut = gmp_init(0);
foreach ($tx->getOutputs() as $output) {
$valueOut = $this->math->add($valueOut, gmp_init($output->getValue(), 10));
$this->consensus->checkAmount($valueOut);
}
if ($this->math->cmp($valueIn, $valueOut) < 0) {
throw new \RuntimeException('Value-in is less than value-out');
}
$fee = $this->math->sub($valueIn, $valueOut);
$this->consensus->checkAmount($fee);
return $this;
}
/**
* @param array $array
* @return $this
*/
private function replace(array $array = [])
{
$this->transaction = new Transaction(array_key_exists('version', $array) ? $array['version'] : $this->transaction->getVersion(), array_key_exists('inputs', $array) ? $array['inputs'] : $this->transaction->getInputs(), array_key_exists('outputs', $array) ? $array['outputs'] : $this->transaction->getOutputs(), array_key_exists('witness', $array) ? $array['witness'] : $this->transaction->getWitnesses(), array_key_exists('nLockTime', $array) ? $array['nLockTime'] : $this->transaction->getLockTime());
return $this;
}
