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<?php |
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declare(strict_types=1); |
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namespace BitWasp\Bitcoin\Transaction; |
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use BitWasp\Bitcoin\Bitcoin; |
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use BitWasp\Bitcoin\Script\ScriptInterface; |
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use BitWasp\Bitcoin\Serializable; |
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use BitWasp\Bitcoin\Serializer\Transaction\OutPointSerializer; |
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use BitWasp\Bitcoin\Serializer\Transaction\TransactionInputSerializer; |
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use BitWasp\Buffertools\BufferInterface; |
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class TransactionInput extends Serializable implements TransactionInputInterface |
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{ |
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/** |
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* @var OutPointInterface |
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*/ |
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private $outPoint; |
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/** |
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* @var ScriptInterface |
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*/ |
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private $script; |
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/** |
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* @var int |
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*/ |
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private $sequence; |
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/** |
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* @param OutPointInterface $outPoint |
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* @param ScriptInterface $script |
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* @param int $sequence |
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*/ |
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public function __construct(OutPointInterface $outPoint, ScriptInterface $script, int $sequence = self::SEQUENCE_FINAL) |
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{ |
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$this->outPoint = $outPoint; |
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$this->script = $script; |
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$this->sequence = $sequence; |
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} |
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/** |
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* @return OutPointInterface |
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*/ |
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public function getOutPoint(): OutPointInterface |
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{ |
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return $this->outPoint; |
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} |
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/** |
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* @return ScriptInterface |
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*/ |
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public function getScript(): ScriptInterface |
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{ |
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return $this->script; |
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} |
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/** |
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* @return int |
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*/ |
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public function getSequence(): int |
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{ |
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return $this->sequence; |
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} |
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/** |
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* @param TransactionInputInterface $other |
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* @return bool |
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*/ |
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public function equals(TransactionInputInterface $other): bool |
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{ |
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if (!$this->outPoint->equals($other->getOutPoint())) { |
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return false; |
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} |
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if (!$this->script->equals($other->getScript())) { |
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return false; |
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} |
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return gmp_cmp(gmp_init($this->sequence), gmp_init($other->getSequence())) === 0; |
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} |
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/** |
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* Check whether this transaction is a Coinbase transaction |
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* |
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* @return bool |
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*/ |
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public function isCoinbase(): bool |
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{ |
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$outpoint = $this->outPoint; |
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return $outpoint->getTxId()->getBinary() === str_pad('', 32, "\x00") |
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&& $outpoint->getVout() == 0xffffffff; |
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} |
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/** |
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* @return bool |
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*/ |
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public function isFinal(): bool |
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{ |
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$math = Bitcoin::getMath(); |
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return $math->cmp(gmp_init($this->getSequence(), 10), gmp_init(self::SEQUENCE_FINAL, 10)) === 0; |
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} |
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/** |
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* @return bool |
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*/ |
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public function isSequenceLockDisabled(): bool |
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{ |
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if ($this->isCoinbase()) { |
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return true; |
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} |
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return ($this->sequence & self::SEQUENCE_LOCKTIME_DISABLE_FLAG) !== 0; |
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} |
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/** |
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* @return bool |
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*/ |
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public function isLockedToTime(): bool |
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{ |
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return !$this->isSequenceLockDisabled() && (($this->sequence & self::SEQUENCE_LOCKTIME_TYPE_FLAG) === self::SEQUENCE_LOCKTIME_TYPE_FLAG); |
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} |
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/** |
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* @return bool |
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*/ |
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public function isLockedToBlock(): bool |
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{ |
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return !$this->isSequenceLockDisabled() && (($this->sequence & self::SEQUENCE_LOCKTIME_TYPE_FLAG) === 0); |
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} |
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/** |
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* @return int |
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*/ |
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public function getRelativeTimeLock(): int |
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{ |
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if (!$this->isLockedToTime()) { |
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throw new \RuntimeException('Cannot decode time based locktime when disable flag set/timelock flag unset/tx is coinbase'); |
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} |
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// Multiply by 512 to convert locktime to seconds |
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return ($this->sequence & self::SEQUENCE_LOCKTIME_MASK) * 512; |
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} |
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/** |
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* @return int |
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*/ |
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public function getRelativeBlockLock(): int |
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{ |
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if (!$this->isLockedToBlock()) { |
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throw new \RuntimeException('Cannot decode block locktime when disable flag set/timelock flag set/tx is coinbase'); |
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} |
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return $this->sequence & self::SEQUENCE_LOCKTIME_MASK; |
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} |
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/** |
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* @return BufferInterface |
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*/ |
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public function getBuffer(): BufferInterface |
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{ |
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return (new TransactionInputSerializer(new OutPointSerializer()))->serialize($this); |
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} |
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} |
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Bit-Wasp /
bitcoin-php
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