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<?php |
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namespace BitWasp\Bitcoin\Script\Factory; |
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use BitWasp\Bitcoin\Address\AddressInterface; |
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use BitWasp\Bitcoin\Address\ScriptHashAddress; |
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use BitWasp\Bitcoin\Crypto\EcAdapter\Key\PublicKeyInterface; |
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use BitWasp\Bitcoin\Crypto\Hash; |
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use BitWasp\Bitcoin\Script\Opcodes; |
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use BitWasp\Bitcoin\Script\ScriptFactory; |
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use BitWasp\Bitcoin\Script\ScriptInterface; |
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use BitWasp\Buffertools\Buffer; |
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use BitWasp\Buffertools\BufferInterface; |
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use BitWasp\Buffertools\Buffertools; |
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class OutputScriptFactory |
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{ |
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/** |
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* @param AddressInterface $address |
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* @return ScriptInterface |
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*/ |
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public function payToAddress(AddressInterface $address) |
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{ |
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return $address instanceof ScriptHashAddress |
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? ScriptFactory::sequence([Opcodes::OP_HASH160, $address->getHash(), Opcodes::OP_EQUAL]) |
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: ScriptFactory::sequence([Opcodes::OP_DUP, Opcodes::OP_HASH160, $address->getHash(), Opcodes::OP_EQUALVERIFY, Opcodes::OP_CHECKSIG]); |
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} |
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/** |
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* Create a Pay to pubkey output |
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* |
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* @param PublicKeyInterface $publicKey |
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* @return ScriptInterface |
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*/ |
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public function payToPubKey(PublicKeyInterface $publicKey) |
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{ |
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return ScriptFactory::sequence([$publicKey->getBuffer(), Opcodes::OP_CHECKSIG]); |
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} |
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/** |
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* Create a P2PKH output script |
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* |
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* @param BufferInterface $pubKeyHash |
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* @return ScriptInterface |
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*/ |
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public function payToPubKeyHash(BufferInterface $pubKeyHash) |
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{ |
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if ($pubKeyHash->getSize() !== 20) { |
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throw new \RuntimeException('Public key hash must be exactly 20 bytes'); |
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} |
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return ScriptFactory::sequence([Opcodes::OP_DUP, Opcodes::OP_HASH160, $pubKeyHash, Opcodes::OP_EQUALVERIFY, Opcodes::OP_CHECKSIG]); |
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} |
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/** |
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/** |
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* Create a P2SH output script |
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* |
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* @param BufferInterface $scriptHash |
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* @return ScriptInterface |
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*/ |
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public function payToScriptHash(BufferInterface $scriptHash) |
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{ |
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if ($scriptHash->getSize() !== 20) { |
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throw new \RuntimeException('P2SH scriptHash must be exactly 20 bytes'); |
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} |
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return ScriptFactory::sequence([Opcodes::OP_HASH160, $scriptHash, Opcodes::OP_EQUAL]); |
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} |
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/** |
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* @param int $m |
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* @param PublicKeyInterface[] $keys |
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* @param bool|true $sort |
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* @return ScriptInterface |
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*/ |
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public function multisig($m, array $keys = [], $sort = true) |
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{ |
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$n = count($keys); |
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if ($m < 0) { |
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throw new \LogicException('Number of signatures cannot be less than zero'); |
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} |
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if ($m > $n) { |
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throw new \LogicException('Required number of sigs exceeds number of public keys'); |
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} |
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if ($n > 20) { |
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throw new \LogicException('Number of public keys is greater than 16'); |
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} |
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if ($sort) { |
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$keys = Buffertools::sort($keys); |
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} |
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$new = ScriptFactory::create(); |
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$new->int($m); |
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foreach ($keys as $key) { |
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if (!$key instanceof PublicKeyInterface) { |
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throw new \LogicException('Values in $keys[] must be a PublicKey'); |
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} |
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$new->push($key->getBuffer()); |
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} |
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return $new->int($n)->op('OP_CHECKMULTISIG')->getScript(); |
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} |
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/** |
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* @param BufferInterface $keyHash |
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* @return ScriptInterface |
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*/ |
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public function witnessKeyHash(BufferInterface $keyHash) |
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{ |
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if ($keyHash->getSize() !== 20) { |
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throw new \RuntimeException('witness key-hash should be 20 bytes'); |
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} |
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return ScriptFactory::sequence([Opcodes::OP_0, $keyHash]); |
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} |
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/** |
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* @param BufferInterface $scriptHash |
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* @return ScriptInterface |
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*/ |
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public function witnessScriptHash(BufferInterface $scriptHash) |
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{ |
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if ($scriptHash->getSize() !== 32) { |
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throw new \RuntimeException('witness script-hash should be 32 bytes'); |
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} |
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return ScriptFactory::sequence([Opcodes::OP_0, $scriptHash]); |
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} |
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/** |
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* @param BufferInterface $witnessMerkleRoot |
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* @return ScriptInterface |
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*/ |
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public function witnessCoinbaseCommitment(BufferInterface $witnessMerkleRoot) |
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{ |
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if ($witnessMerkleRoot->getSize() !== 32) { |
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throw new \RuntimeException('Witness Merkle Root must be exactly 32-bytes'); |
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} |
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static $reservedValue = null; |
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if ($reservedValue === null) { |
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$reservedValue = new Buffer('', 32); |
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} |
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return ScriptFactory::sequence([ |
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Opcodes::OP_RETURN, |
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new Buffer("\xaa\x21\xa9\xed" . Hash::sha256d(new Buffer($witnessMerkleRoot->getBinary() . $reservedValue->getBinary()))->getBinary()) |
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]); |
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} |
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} |
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Bit-Wasp /
bitcoin-php
