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<?php |
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namespace BitWasp\Bitcoin\Serializer\Transaction; |
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use BitWasp\Bitcoin\Bitcoin; |
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use BitWasp\Bitcoin\Serializer\Script\ScriptWitnessSerializer; |
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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\Buffer; |
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use BitWasp\Buffertools\BufferInterface; |
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use BitWasp\Buffertools\ByteOrder; |
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use BitWasp\Buffertools\Parser; |
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use BitWasp\Buffertools\Types\Int32; |
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use BitWasp\Buffertools\Types\Int8; |
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use BitWasp\Buffertools\Types\Uint32; |
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use BitWasp\Buffertools\Types\VarInt; |
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use BitWasp\Buffertools\Types\Vector; |
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class TransactionSerializer implements TransactionSerializerInterface |
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{ |
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/** |
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* @var TransactionInputSerializer |
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*/ |
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private $inputSerializer; |
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/** |
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* @var TransactionOutputSerializer |
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*/ |
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private $outputSerializer; |
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/** |
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* @var ScriptWitnessSerializer |
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*/ |
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private $witnessSerializer; |
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public function __construct(TransactionInputSerializer $txInSer = null, TransactionOutputSerializer $txOutSer = null, ScriptWitnessSerializer $witSer = null) |
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{ |
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$this->inputSerializer = $txInSer ?: new TransactionInputSerializer(new OutPointSerializer()); |
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$this->outputSerializer = $txOutSer ?: new TransactionOutputSerializer; |
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$this->witnessSerializer = $witSer ?: new ScriptWitnessSerializer(); |
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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 $parser) |
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{ |
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$math = Bitcoin::getMath(); |
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$int32le = new Int32($math, ByteOrder::LE); |
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$uint32le = new Uint32($math, ByteOrder::LE); |
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$varint = new VarInt($math, ByteOrder::LE); |
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$version = $int32le->read($parser); |
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$vin = []; |
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$vinCount = $varint->read($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) $varint->read($parser); |
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if ($flags != 0) { |
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$vinCount = $varint->read($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 = $varint->read($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 = $varint->read($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; $i++) { |
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$vectorCount = $varint->read($parser); |
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$vwit[] = $this->witnessSerializer->fromParser($parser, $vectorCount); |
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} |
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} |
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if ($flags) { |
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throw new \RuntimeException('Flags byte was 0'); |
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} |
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$lockTime = $uint32le->read($parser); |
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return new Transaction( |
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$version, |
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$vin, |
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$vout, |
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$vwit, |
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$lockTime |
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); |
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} |
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/** |
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* @param string|BufferInterface $data |
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* @return TransactionInterface |
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*/ |
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public function parse($data) |
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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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* @return BufferInterface |
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*/ |
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public function serialize(TransactionInterface $transaction) |
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{ |
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$math = Bitcoin::getMath(); |
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$int8le = new Int8($math, ByteOrder::LE); |
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$int32le = new Int32($math, ByteOrder::LE); |
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$uint32le = new Uint32($math, ByteOrder::LE); |
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$varint = new VarInt($math, ByteOrder::LE); |
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$vector = new Vector($varint, function () { |
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}); |
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$binary = $int32le->write($transaction->getVersion()); |
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$flags = 0; |
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if (!empty($transaction->getWitnesses())) { |
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$flags |= 1; |
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} |
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if ($flags) { |
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$binary .= $int8le->write(0); |
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$binary .= $int8le->write($flags); |
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} |
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$binary .= $vector->write($transaction->getInputs()); |
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$binary .= $vector->write($transaction->getOutputs()); |
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if ($flags & 1) { |
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foreach ($transaction->getWitnesses() as $witness) { |
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$binary .= $witness->getBuffer()->getBinary(); |
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} |
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} |
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$binary .= $uint32le->write($transaction->getLockTime()); |
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return new Buffer($binary); |
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} |
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} |
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Bit-Wasp /
bitcoin-php
