/**
* Composes a send transaction
* @param string $asset A counterparty asset name or BTC
* @param mixed $quantity Quantity of asset to send. Accepts a float or a Tokenly\CounterpartyTransactionComposer\Quantity or Tokenly\CryptoQuantity\CryptoQuantity object. Use a Quantity object for indivisible assets.
* @param mixed $destination A single destination bitcoin address. For BTC sends an array of [[address, amount], [address, amount]] is also allowed. Amounts should be float values.
* @param string $private_key_wif The private key in ASCII WIF format. This can be null to compose an unsigned transaction.
* @param array $utxos An array of UTXOs. Each UTXO should be ['txid' => txid, 'n' => n, 'amount' => amount (in satoshis), 'script' => script hexadecimal string]
* @param mixed $change_address_collection a single address string to receive all change. Or an array of [[address, amount], [address, amount], [address]]. Amounts should be float values. An address with no amount for the last entry will send the remaining change to that address.
* @param float $fee A fee
* @param float $btc_dust Amount of BTC dust to send with the Counterparty transaction.
* @return Array returns a ComposedTransaction object
*/
public function composeSend($asset, $quantity, $destination, $private_key_wif, $utxos, $change_address_collection = null, $fee = null, $btc_dust = null)
{
if ($asset == 'BTC') {
return $this->composeBTCSend($quantity, $destination, $private_key_wif, $utxos, $change_address_collection, $fee);
}
$fee_satoshis = $fee === null ? self::DEFAULT_FEE : intval(round($fee * self::SATOSHI));
$btc_dust_satoshis = $btc_dust === null ? self::DEFAULT_BTC_DUST : intval(round($btc_dust * self::SATOSHI));
// get total and change amount
$change_amounts = $this->calculateAndValidateChange($utxos, $btc_dust_satoshis, $fee_satoshis, $change_address_collection);
$tx_builder = TransactionFactory::build();
// add the UTXO inputs
$transaction_outputs = $this->addInputsAndReturnPreviousOutputs($utxos, $tx_builder);
// pay the btc_dust to the destination
if (is_array($destination)) {
throw new Exception("Multiple destinations are not supported for counterparty sends", 1);
}
$tx_builder->payToAddress($btc_dust_satoshis, AddressFactory::fromString($destination));
// build the OP_RETURN script
$op_return_builder = new OpReturnBuilder();
$op_return = $op_return_builder->buildOpReturn($quantity, $asset, $utxos[0]['txid']);
$script = ScriptFactory::create()->op('OP_RETURN')->push(Buffer::hex($op_return, 28))->getScript();
$tx_builder->output(0, $script);
// pay the change to self
$this->payChange($change_amounts, $tx_builder);
// sign
if ($private_key_wif !== null) {
$signed_transaction = $this->signTx($private_key_wif, $tx_builder, $transaction_outputs);
return $this->buildReturnValuesFromTransactionAndInputs($signed_transaction, $utxos, true);
}
return $this->buildReturnValuesFromTransactionAndInputs($tx_builder->get(), $utxos, false);
}
/**
* @param int $m
* @param PublicKeyInterface[] $keys
* @param bool|true $sort
* @return ScriptCreator|Script
*/
public function multisig($m, array $keys = [], $sort = true)
{
$n = count($keys);
if ($m > $n) {
throw new \LogicException('Required number of sigs exceeds number of public keys');
}
if ($n > 16) {
throw new \LogicException('Number of public keys is greater than 16');
}
if ($sort) {
$keys = Buffertools::sort($keys);
}
$opM = \BitWasp\Bitcoin\Script\encodeOpN($m);
$opN = \BitWasp\Bitcoin\Script\encodeOpN($n);
$script = ScriptFactory::create();
foreach ($keys as $key) {
if (!$key instanceof PublicKeyInterface) {
throw new \LogicException('Values in $keys[] must be a PublicKey');
}
$script->push($key->getBuffer());
}
$keyBuf = $script->getScript()->getBuffer();
$script = new Script(new Buffer(chr($opM) . $keyBuf->getBinary() . chr($opN) . chr(Opcodes::OP_CHECKMULTISIG)));
return $script;
}
/**
* @param ScriptInterface $inputScript
* @param ScriptInterface $redeemScript
* @return ScriptInterface
*/
public function payToScriptHash(ScriptInterface $inputScript, ScriptInterface $redeemScript)
{
return ScriptFactory::create($inputScript->getBuffer())->push($redeemScript->getBuffer())->getScript();
}
/**
* @return ScriptInterface
*/
public function getScript()
{
return ScriptFactory::create()->int($this->version)->push($this->program)->getScript();
}
/**
* @param Buffer $secret
* @param PublicKeyInterface $a1
* @param PublicKeyInterface $a2
* @param PublicKeyInterface $b1
* @param PublicKeyInterface $b2
* @return ScriptInterface
*/
public function payToLightningChannel(Buffer $secret, PublicKeyInterface $a1, PublicKeyInterface $a2, PublicKeyInterface $b1, PublicKeyInterface $b2)
{
return ScriptFactory::create()->op('OP_DEPTH')->op('OP_3')->op('OP_EQUAL')->op('OP_IF')->op('OP_HASH160')->push(Hash::sha256ripe160($secret))->op('OP_EQUALVERIFY')->concat(ScriptFactory::scriptPubKey()->multisig(2, [$a1, $b1]))->op('OP_ELSE')->concat(ScriptFactory::scriptPubKey()->multisig(2, [$a2, $b2]))->op('OP_ENDIF')->getScript();
}
/**
* @return \BitWasp\Bitcoin\Block\BlockInterface
*/
public function getGenesisBlock()
{
$timestamp = new Buffer('The Times 03/Jan/2009 Chancellor on brink of second bailout for banks', null, $this->math);
$publicKey = Buffer::hex('04678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb649f6bc3f4cef38c4f35504e51ec112de5c384df7ba0b8d578a4c702b6bf11d5f', null, $this->math);
$inputScript = ScriptFactory::create()->push(Buffer::int('486604799', 4, $this->math)->flip())->push(Buffer::int('4', null, $this->math))->push($timestamp)->getScript();
$outputScript = ScriptFactory::create()->push($publicKey)->op('OP_CHECKSIG')->getScript();
return new Block($this->math, $this->getGenesisBlockHeader(), new TransactionCollection([(new TxBuilder())->version('1')->input(new Buffer('', 32), 0xffffffff, $inputScript)->output(5000000000, $outputScript)->locktime(0)->get()]));
}
/**
* @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());
}
/**
* Calculate the hash of the current transaction, when you are looking to
* spend $txOut, and are signing $inputToSign. The SigHashType defaults to
* SIGHASH_ALL, though SIGHASH_SINGLE, SIGHASH_NONE, SIGHASH_ANYONECANPAY
* can be used.
*
* @param ScriptInterface $txOutScript
* @param int $inputToSign
* @param int $sighashType
* @return BufferInterface
* @throws \Exception
*/
public function calculate(ScriptInterface $txOutScript, $inputToSign, $sighashType = SigHash::ALL)
{
$sighashType = (int) $sighashType;
$hashPrevOuts = $this->hashPrevOuts($sighashType);
$hashSequence = $this->hashSequences($sighashType);
$hashOutputs = $this->hashOutputs($sighashType, $inputToSign);
$input = $this->transaction->getInput($inputToSign);
return Hash::sha256d(new Buffer(pack("V", $this->transaction->getVersion()) . $hashPrevOuts->getBinary() . $hashSequence->getBinary() . $input->getOutPoint()->getBinary() . ScriptFactory::create()->push($txOutScript->getBuffer())->getScript()->getBinary() . Buffer::int($this->amount, 8)->flip()->getBinary() . pack("V", $input->getSequence()) . $hashOutputs->getBinary() . pack("V", $this->transaction->getLockTime()) . pack("V", $sighashType)));
}
/**
* @param OutputBuf $outBuf
* @return TransactionOutput
*/
private function bufToOutput(OutputBuf $outBuf)
{
$script = ScriptFactory::create(new Buffer($outBuf->getScript()));
$output = new TransactionOutput($outBuf->getAmount(), $script);
return $output;
}
/**
* @param array $signatures
* @param array $publicKeys
* @return ScriptInterface
*/
public function makeScriptSig(array $signatures = [], array $publicKeys = [])
{
$inputScript = $this->handler->makeScriptSig($signatures, $publicKeys);
return ScriptFactory::create($inputScript->getBuffer())->push($this->redeemScript->getBuffer())->getScript();
}
/**
* @return SigValues
*/
public function serializeSignatures()
{
static $emptyScript = null;
static $emptyWitness = null;
if (is_null($emptyScript) || is_null($emptyWitness)) {
$emptyScript = new Script();
$emptyWitness = new ScriptWitness([]);
}
/** @var BufferInterface[] $return */
$outputType = (new OutputClassifier($this->txOut->getScript()))->classify();
/** @var SigValues $answer */
$answer = new SigValues($emptyScript, $emptyWitness);
$serialized = $this->serializeSimpleSig($outputType, $answer);
$p2sh = false;
if (!$serialized && $outputType === OutputClassifier::PAYTOSCRIPTHASH) {
$p2sh = true;
$outputType = (new OutputClassifier($this->redeemScript))->classify();
$serialized = $this->serializeSimpleSig($outputType, $answer);
}
if (!$serialized && $outputType === OutputClassifier::WITNESS_V0_KEYHASH) {
$answer = new SigValues($emptyScript, new ScriptWitness([$this->signatures[0]->getBuffer(), $this->publicKeys[0]->getBuffer()]));
} else {
if (!$serialized && $outputType === OutputClassifier::WITNESS_V0_SCRIPTHASH) {
$outputType = (new OutputClassifier($this->witnessScript))->classify();
$serialized = $this->serializeSimpleSig($outputType, $answer);
if ($serialized) {
$data = [];
foreach ($answer->getScriptSig()->getScriptParser()->decode() as $o) {
$data[] = $o->getData();
}
$data[] = $this->witnessScript->getBuffer();
$answer = new SigValues($emptyScript, new ScriptWitness($data));
}
}
}
if ($p2sh) {
$answer = new SigValues(ScriptFactory::create($answer->getScriptSig()->getBuffer())->push($this->redeemScript->getBuffer())->getScript(), $answer->getScriptWitness());
}
return $answer;
}
<?php
require_once "../vendor/autoload.php";
use BitWasp\Bitcoin\Script\ScriptFactory;
use BitWasp\Bitcoin\Transaction\Transaction;
$ec = \BitWasp\Bitcoin\Bitcoin::getEcAdapter();
$script = ScriptFactory::create()->op('OP_1')->op('OP_1')->op('OP_ADD')->op('OP_2')->op('OP_EQUALVERIFY');
echo "Formed script: " . $script->getHex() . "\n";
print_r($script->getScriptParser()->parse());
$factory = new \BitWasp\Bitcoin\Script\Interpreter\InterpreterFactory($ec);
$flags = $factory->flags(0);
$i = $factory->getNativeInterpreter(new Transaction(), $flags);
$result = $i->setScript($script)->run();
echo "Script result: " . ($result ? 'true' : 'false') . "\n";
/**
* @return \BitWasp\Bitcoin\Script\Script
*/
public function regenerateScript()
{
// todo: this is worrisome, should have some way to fail and defer to the original script
$signatures = array_filter($this->getSignatures());
$script = $this->execForInputTypes(function () use(&$signatures) {
return count($signatures) == 1 ? ScriptFactory::scriptSig()->payToPubKeyHash($signatures[0], $this->publicKeys[0]) : ScriptFactory::create();
}, function () use(&$signatures) {
return count($signatures) == 1 ? ScriptFactory::scriptSig()->payToPubKey($signatures[0]) : ScriptFactory::create();
}, function () use(&$signatures) {
return count($signatures) > 0 ? ScriptFactory::scriptSig()->multisigP2sh($this->getRedeemScript(), array_filter($this->signatures)) : ScriptFactory::create();
});
return $script;
}
<?php
require_once "../vendor/autoload.php";
use BitWasp\Bitcoin\Script\ScriptFactory;
use BitWasp\Bitcoin\Transaction\Transaction;
use BitWasp\Bitcoin\Script\Script;
$ec = \BitWasp\Bitcoin\Bitcoin::getEcAdapter();
$scriptSig = ScriptFactory::create()->int(1)->int(1)->getScript();
$scriptPubKey = ScriptFactory::create()->op('OP_ADD')->int(2)->op('OP_EQUAL')->getScript();
echo "Formed script: " . $scriptSig->getHex() . " " . $scriptPubKey->getHex() . "\n";
$flags = new \BitWasp\Bitcoin\Flags(0);
$i = new \BitWasp\Bitcoin\Script\Interpreter\Interpreter($ec, new Transaction(), $flags);
$result = $i->verify($scriptSig, $scriptPubKey, 0);
echo "Script result: " . ($result ? 'true' : 'false') . "\n";
<?php
require "vendor/autoload.php";
use BitWasp\Bitcoin\Script\ScriptFactory;
use BitWasp\Bitcoin\Transaction\TransactionFactory;
use BitWasp\Buffertools\Buffer;
$scriptPubKey = ScriptFactory::create()->op('OP_1')->op('OP_EQUAL')->getScript();
$scriptSig = ScriptFactory::create()->op('OP_1')->getScript();
$tx = TransactionFactory::build()->input(Buffer::hex('0000000000000000000000000000000000000000000000000000000000000001'), 0, $scriptSig)->output(1, new \BitWasp\Bitcoin\Script\Script())->get();
$t1 = ['txid' => 'a', 'tx' => $tx->getHex(), 'scripts' => [$scriptPubKey->getHex()]];
$msg = ['id' => 'asdfasdfsadf', 'flags' => 0, 'txs' => [$t1]];
echo 'sending';
$context = new \ZMQContext();
$push = $context->getSocket(\ZMQ::SOCKET_REQ);
$push->connect('tcp://127.0.0.1:6661');
$push->send(json_encode($msg));
$response = $push->recv();
echo $response . PHP_EOL;
/**
* @param TransactionSignatureInterface $signature
* @return Script
*/
public function payToPubKey(TransactionSignatureInterface $signature)
{
return ScriptFactory::create()->push($signature->getBuffer());
}
/**
* @param ScriptInterface $scriptSig
* @param ScriptInterface $scriptPubKey
* @param int $flags
* @param Checker $checker
* @param ScriptWitnessInterface|null $witness
* @return bool
*/
public function verify(ScriptInterface $scriptSig, ScriptInterface $scriptPubKey, $flags, Checker $checker, ScriptWitnessInterface $witness = null)
{
static $emptyWitness = null;
if ($emptyWitness === null) {
$emptyWitness = new ScriptWitness([]);
}
$witness = $witness ?: $emptyWitness;
if (($flags & self::VERIFY_SIGPUSHONLY) != 0 && !$scriptSig->isPushOnly()) {
return false;
}
$stack = new Stack();
if (!$this->evaluate($scriptSig, $stack, 0, $flags, $checker)) {
return false;
}
$backup = [];
if ($flags & self::VERIFY_P2SH) {
foreach ($stack as $s) {
$backup[] = $s;
}
}
if (!$this->evaluate($scriptPubKey, $stack, 0, $flags, $checker)) {
return false;
}
if ($stack->isEmpty()) {
return false;
}
if (false === $this->castToBool($stack[-1])) {
return false;
}
$program = null;
if ($flags & self::VERIFY_WITNESS) {
if ($scriptPubKey->isWitness($program)) {
/** @var WitnessProgram $program */
if ($scriptSig->getBuffer()->getSize() !== 0) {
return false;
}
if (!$this->verifyWitnessProgram($program, $witness, $flags, $checker)) {
return false;
}
$stack->resize(1);
}
}
if ($flags & self::VERIFY_P2SH && (new OutputClassifier($scriptPubKey))->isPayToScriptHash()) {
if (!$scriptSig->isPushOnly()) {
return false;
}
$stack = new Stack();
foreach ($backup as $i) {
$stack->push($i);
}
// Restore mainStack to how it was after evaluating scriptSig
if ($stack->isEmpty()) {
return false;
}
// Load redeemscript as the scriptPubKey
$scriptPubKey = new Script($stack->bottom());
$stack->pop();
if (!$this->evaluate($scriptPubKey, $stack, 0, $flags, $checker)) {
return false;
}
if ($stack->isEmpty()) {
return false;
}
if (!$this->castToBool($stack->bottom())) {
return false;
}
if ($flags & self::VERIFY_WITNESS) {
if ($scriptPubKey->isWitness($program)) {
/** @var WitnessProgram $program */
if ($scriptSig != ScriptFactory::create()->push($scriptPubKey->getBuffer())->getScript()) {
return false;
// SCRIPT_ERR_WITNESS_MALLEATED_P2SH
}
if (!$this->verifyWitnessProgram($program, $witness, $flags, $checker)) {
return false;
}
$stack->resize(1);
}
}
}
if ($flags & self::VERIFY_CLEAN_STACK != 0) {
if (!($flags & self::VERIFY_P2SH != 0 && $flags & self::VERIFY_WITNESS != 0)) {
return false;
// implied flags required
}
if (count($stack) != 1) {
return false;
// Cleanstack
}
}
if ($flags & self::VERIFY_WITNESS) {
if (!$flags & self::VERIFY_P2SH) {
return false;
//
}
if ($program === null && !$witness->isNull()) {
return false;
// SCRIPT_ERR_WITNESS_UNEXPECTED
}
}
return true;
}
