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<?php |
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namespace BitWasp\Bitcoin\Script\ScriptInfo; |
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use BitWasp\Bitcoin\Crypto\EcAdapter\Key\PublicKeyInterface; |
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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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use BitWasp\Bitcoin\Script\ScriptType; |
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use BitWasp\Buffertools\BufferInterface; |
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class PayToPubkeyHash |
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{ |
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/** |
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* @var BufferInterface |
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*/ |
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private $hash; |
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/** |
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* @var bool |
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*/ |
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private $verify; |
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/** |
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* PayToPubkeyHash constructor. |
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* @param $opcode |
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* @param BufferInterface $hash160 |
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* @param bool $allowVerify |
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*/ |
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public function __construct($opcode, BufferInterface $hash160, $allowVerify = false) |
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{ |
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if ($hash160->getSize() !== 20) { |
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throw new \RuntimeException('Malformed pay-to-pubkey-hash script'); |
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} |
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if ($opcode === Opcodes::OP_CHECKSIG) { |
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$verify = false; |
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} else if ($allowVerify && $opcode === Opcodes::OP_CHECKSIGVERIFY) { |
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$verify = true; |
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} else { |
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throw new \RuntimeException("Malformed pay-to-pubkey-hash script - invalid opcode"); |
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} |
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$this->hash = $hash160; |
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$this->opcode = $opcode; |
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$this->verify = $verify; |
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} |
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/** |
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* @param Operation[] $chunks |
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* @param bool $allowVerify |
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* @return static |
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*/ |
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public static function fromDecodedScript(array $chunks, $allowVerify = false) |
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{ |
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if (count($chunks) !== 5) { |
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throw new \RuntimeException('Malformed pay-to-pubkey-hash script'); |
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} |
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2 |
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if ($chunks[0]->getOp() !== Opcodes::OP_DUP |
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|| $chunks[1]->getOp() !== Opcodes::OP_HASH160 |
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|| $chunks[3]->getOp() !== Opcodes::OP_EQUALVERIFY |
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) { |
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throw new \RuntimeException('Malformed pay-to-pubkey-hash script'); |
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} |
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return new static($chunks[4]->getOp(), $chunks[2]->getData(), $allowVerify); |
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} |
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/** |
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* @param ScriptInterface $script |
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* @param bool $allowVerify |
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* @return PayToPubkeyHash |
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*/ |
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public static function fromScript(ScriptInterface $script, $allowVerify = false) |
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{ |
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return self::fromDecodedScript($script->getScriptParser()->decode(), $allowVerify); |
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} |
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public function getType() |
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{ |
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return ScriptType::P2PK; |
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} |
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/** |
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* @return int |
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*/ |
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public function getRequiredSigCount() |
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{ |
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return 1; |
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} |
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/** |
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* @return int |
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*/ |
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public function getKeyCount() |
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{ |
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return 1; |
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} |
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/** |
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* @return bool |
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*/ |
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public function isChecksigVerify() |
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{ |
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return $this->verify; |
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} |
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/** |
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* @param PublicKeyInterface $publicKey |
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* @return bool |
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*/ |
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public function checkInvolvesKey(PublicKeyInterface $publicKey) |
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{ |
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return $publicKey->getPubKeyHash()->equals($this->hash); |
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} |
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/** |
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* @return BufferInterface |
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*/ |
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public function getPubKeyHash() |
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{ |
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return $this->hash; |
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} |
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} |
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Bit-Wasp /
bitcoin-php
In PHP it is possible to write to properties without declaring them. For example, the following is perfectly valid PHP code:
Generally, it is a good practice to explictly declare properties to avoid accidental typos and provide IDE auto-completion: