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<?php |
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declare(strict_types=1); |
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namespace BitWasp\Bitcoin\Serializer\Transaction; |
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use BitWasp\Bitcoin\Script\Opcodes; |
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use BitWasp\Bitcoin\Serializer\Script\ScriptWitnessSerializer; |
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use BitWasp\Bitcoin\Serializer\Types; |
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use BitWasp\Bitcoin\Transaction\Transaction; |
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use BitWasp\Bitcoin\Transaction\TransactionInterface; |
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use BitWasp\Buffertools\BufferInterface; |
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use BitWasp\Buffertools\Parser; |
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class TransactionSerializer implements TransactionSerializerInterface |
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{ |
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const NO_WITNESS = 1; |
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/** |
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* @var \BitWasp\Buffertools\Types\Int32 |
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*/ |
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protected $int32le; |
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/** |
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* @var \BitWasp\Buffertools\Types\Uint32 |
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*/ |
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protected $uint32le; |
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/** |
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* @var \BitWasp\Buffertools\Types\VarInt |
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*/ |
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protected $varint; |
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/** |
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* @var TransactionInputSerializer |
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*/ |
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protected $inputSerializer; |
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/** |
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* @var TransactionOutputSerializer |
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*/ |
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protected $outputSerializer; |
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/** |
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* @var ScriptWitnessSerializer |
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*/ |
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protected $witnessSerializer; |
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public function __construct(TransactionInputSerializer $inputSerializer = null, TransactionOutputSerializer $outputSerializer = null, ScriptWitnessSerializer $witnessSerializer = null) |
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{ |
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$this->int32le = Types::int32le(); |
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$this->uint32le = Types::uint32le(); |
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$this->varint = Types::varint(); |
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if ($inputSerializer === null || $outputSerializer === null) { |
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$opcodes = new Opcodes(); |
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if (!$inputSerializer) { |
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$inputSerializer = new TransactionInputSerializer(new OutPointSerializer(), $opcodes); |
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} |
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if (!$outputSerializer) { |
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$outputSerializer = new TransactionOutputSerializer($opcodes); |
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} |
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} |
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if (!$witnessSerializer) { |
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$witnessSerializer = new ScriptWitnessSerializer(); |
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} |
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$this->inputSerializer = $inputSerializer; |
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$this->outputSerializer = $outputSerializer; |
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$this->witnessSerializer = $witnessSerializer; |
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} |
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/** |
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* @param Parser $parser |
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* @return TransactionInterface |
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*/ |
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public function fromParser(Parser $parser): TransactionInterface |
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{ |
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$version = (int) $this->int32le->read($parser); |
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$vin = []; |
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$vinCount = $this->varint->read($parser); |
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for ($i = 0; $i < $vinCount; $i++) { |
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$vin[] = $this->inputSerializer->fromParser($parser); |
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} |
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$vout = []; |
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$flags = 0; |
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if (count($vin) === 0) { |
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$flags = (int) $this->varint->read($parser); |
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if ($flags !== 0) { |
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$vinCount = $this->varint->read($parser); |
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for ($i = 0; $i < $vinCount; $i++) { |
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$vin[] = $this->inputSerializer->fromParser($parser); |
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} |
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$voutCount = $this->varint->read($parser); |
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for ($i = 0; $i < $voutCount; $i++) { |
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$vout[] = $this->outputSerializer->fromParser($parser); |
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} |
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} |
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} else { |
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$voutCount = $this->varint->read($parser); |
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for ($i = 0; $i < $voutCount; $i++) { |
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$vout[] = $this->outputSerializer->fromParser($parser); |
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} |
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} |
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$vwit = []; |
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if (($flags & 1)) { |
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$flags ^= 1; |
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$witCount = count($vin); |
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for ($i = 0; $i < $witCount; $i++) { |
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$vwit[] = $this->witnessSerializer->fromParser($parser); |
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} |
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} |
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if ($flags) { |
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throw new \RuntimeException('Flags byte was 0'); |
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} |
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$lockTime = (int) $this->uint32le->read($parser); |
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return new Transaction($version, $vin, $vout, $vwit, $lockTime); |
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} |
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/** |
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* @param BufferInterface $data |
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* @return TransactionInterface |
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*/ |
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public function parse(BufferInterface $data): TransactionInterface |
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{ |
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return $this->fromParser(new Parser($data)); |
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} |
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/** |
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* @param TransactionInterface $transaction |
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* @param int $opt |
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* @return BufferInterface |
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*/ |
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public function serialize(TransactionInterface $transaction, int $opt = 0): BufferInterface |
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{ |
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$parser = new Parser(); |
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$parser->appendBinary($this->int32le->write($transaction->getVersion())); |
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$flags = 0; |
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$allowWitness = !($opt & self::NO_WITNESS); |
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if ($allowWitness && $transaction->hasWitness()) { |
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$flags |= 1; |
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} |
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if ($flags) { |
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$parser->appendBinary(pack("CC", 0, $flags)); |
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} |
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$parser->appendBinary($this->varint->write(count($transaction->getInputs()))); |
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foreach ($transaction->getInputs() as $input) { |
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$parser->appendBuffer($this->inputSerializer->serialize($input)); |
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} |
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$parser->appendBinary($this->varint->write(count($transaction->getOutputs()))); |
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foreach ($transaction->getOutputs() as $output) { |
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$parser->appendBuffer($this->outputSerializer->serialize($output)); |
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} |
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if ($flags & 1) { |
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foreach ($transaction->getWitnesses() as $witness) { |
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$parser->appendBuffer($this->witnessSerializer->serialize($witness)); |
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} |
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} |
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$parser->appendBinary($this->uint32le->write($transaction->getLockTime())); |
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return $parser->getBuffer(); |
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} |
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} |
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Bit-Wasp /
bitcoin-php
