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<?php |
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declare(strict_types=1); |
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namespace BitWasp\Bitcoin\Transaction\Factory\ScriptInfo; |
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use BitWasp\Bitcoin\Locktime; |
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use BitWasp\Bitcoin\Script\Interpreter\Number; |
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use BitWasp\Bitcoin\Script\Opcodes; |
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use BitWasp\Bitcoin\Script\Parser\Operation; |
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use BitWasp\Bitcoin\Script\ScriptInterface; |
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class CheckLocktimeVerify |
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{ |
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/** |
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* @var int |
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*/ |
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private $nLockTime; |
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/** |
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* @var bool |
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*/ |
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private $toBlock; |
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/** |
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* CheckLocktimeVerify constructor. |
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* @param int $nLockTime |
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*/ |
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public function __construct(int $nLockTime) |
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{ |
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if ($nLockTime < 0) { |
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throw new \RuntimeException("locktime cannot be negative"); |
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} |
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if ($nLockTime > Locktime::INT_MAX) { |
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throw new \RuntimeException("nLockTime exceeds maximum value"); |
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} |
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$this->nLockTime = $nLockTime; |
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$this->toBlock = (new Locktime())->isLockedToBlock($nLockTime); |
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} |
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/** |
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* @param Operation[] $chunks |
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* @param bool $fMinimal |
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* @return static |
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*/ |
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public static function fromDecodedScript(array $chunks, bool $fMinimal = false): self |
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{ |
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if (count($chunks) !== 3) { |
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throw new \RuntimeException("Invalid number of items for CLTV"); |
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} |
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if (!$chunks[0]->isPush()) { |
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throw new \InvalidArgumentException('CLTV script had invalid value for time'); |
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} |
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if ($chunks[1]->getOp() !== Opcodes::OP_CHECKLOCKTIMEVERIFY) { |
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throw new \InvalidArgumentException('CLTV script invalid opcode'); |
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} |
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if ($chunks[2]->getOp() !== Opcodes::OP_DROP) { |
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throw new \InvalidArgumentException('CLTV script invalid opcode'); |
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} |
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$numLockTime = Number::buffer($chunks[0]->getData(), $fMinimal, 5); |
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return new static((int) $numLockTime->getInt()); |
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} |
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/** |
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* @param ScriptInterface $script |
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* @return CheckLocktimeVerify |
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*/ |
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public static function fromScript(ScriptInterface $script): self |
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{ |
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return static::fromDecodedScript($script->getScriptParser()->decode()); |
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} |
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/** |
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* @return int |
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*/ |
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public function getLocktime(): int |
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{ |
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return $this->nLockTime; |
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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->toBlock; |
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} |
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} |
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Bit-Wasp /
bitcoin-php
