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<?php |
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namespace BitWasp\Bitcoin\Script\ScriptInfo; |
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use BitWasp\Bitcoin\Bitcoin; |
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use BitWasp\Bitcoin\Crypto\EcAdapter\EcSerializer; |
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use BitWasp\Bitcoin\Crypto\EcAdapter\Impl\PhpEcc\Key\PublicKey; |
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use BitWasp\Bitcoin\Crypto\EcAdapter\Key\PublicKeyInterface; |
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use BitWasp\Bitcoin\Crypto\EcAdapter\Serializer\Key\PublicKeySerializerInterface; |
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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 Multisig |
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{ |
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/** |
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* @var int |
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*/ |
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private $m; |
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/** |
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* @var int |
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*/ |
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private $n; |
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/** |
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* @var bool |
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*/ |
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private $verify = false; |
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/** |
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* @var BufferInterface[] |
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*/ |
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private $keyBuffers = []; |
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/** |
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* @var PublicKeySerializerInterface |
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*/ |
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private $pubKeySerializer; |
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/** |
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* Multisig constructor. |
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* @param int $requiredSigs |
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* @param BufferInterface[] $keys |
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* @param int $opcode |
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* @param bool $allowVerify |
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* @param PublicKeySerializerInterface|null $pubKeySerializer |
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*/ |
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public function __construct($requiredSigs, array $keys, $opcode, $allowVerify = false, PublicKeySerializerInterface $pubKeySerializer = null) |
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{ |
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if ($opcode === Opcodes::OP_CHECKMULTISIG) { |
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$verify = false; |
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} else if ($allowVerify && $opcode === Opcodes::OP_CHECKMULTISIGVERIFY) { |
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$verify = true; |
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} else { |
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throw new \InvalidArgumentException('Malformed multisig script'); |
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} |
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foreach ($keys as $key) { |
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if (!PublicKey::isCompressedOrUncompressed($key)) { |
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throw new \RuntimeException("Malformed public key"); |
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} |
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} |
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$keyCount = count($keys); |
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if ($requiredSigs < 0 || $requiredSigs > $keyCount) { |
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throw new \RuntimeException("Invalid number of required signatures"); |
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} |
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if ($keyCount < 1 || $keyCount > 16) { |
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throw new \RuntimeException("Invalid number of public keys"); |
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} |
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if (null === $pubKeySerializer) { |
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$pubKeySerializer = EcSerializer::getSerializer(PublicKeySerializerInterface::class, false, Bitcoin::getEcAdapter()); |
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} |
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$this->verify = $verify; |
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$this->m = $requiredSigs; |
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$this->n = $keyCount; |
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$this->keyBuffers = $keys; |
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$this->pubKeySerializer = $pubKeySerializer; |
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} |
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/** |
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* @param Operation[] $decoded |
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* @param PublicKeySerializerInterface|null $pubKeySerializer |
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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 $decoded, PublicKeySerializerInterface $pubKeySerializer = null, $allowVerify = false) |
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{ |
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if (count($decoded) < 4) { |
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throw new \InvalidArgumentException('Malformed multisig script'); |
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} |
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2 |
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$mCode = $decoded[0]->getOp(); |
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$nCode = $decoded[count($decoded) - 2]->getOp(); |
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$opCode = end($decoded)->getOp(); |
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$requiredSigs = \BitWasp\Bitcoin\Script\decodeOpN($mCode); |
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$publicKeyBuffers = []; |
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foreach (array_slice($decoded, 1, -2) as $key) { |
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/** @var \BitWasp\Bitcoin\Script\Parser\Operation $key */ |
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if (!$key->isPush()) { |
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throw new \RuntimeException('Malformed multisig script'); |
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} |
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$buffer = $key->getData(); |
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$publicKeyBuffers[] = $buffer; |
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} |
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$keyCount = \BitWasp\Bitcoin\Script\decodeOpN($nCode); |
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if ($keyCount !== count($publicKeyBuffers)) { |
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throw new \LogicException('No public keys found in script'); |
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} |
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return new static($requiredSigs, $publicKeyBuffers, $opCode, $allowVerify, $pubKeySerializer); |
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} |
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/** |
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* @param ScriptInterface $script |
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* @param PublicKeySerializerInterface|null $pubKeySerializer |
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* @param bool $allowVerify |
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* @return Multisig |
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*/ |
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public static function fromScript(ScriptInterface $script, PublicKeySerializerInterface $pubKeySerializer = null, $allowVerify = false) |
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{ |
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return static::fromDecodedScript($script->getScriptParser()->decode(), $pubKeySerializer, $allowVerify); |
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} |
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/** |
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* @return string |
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*/ |
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public function getType() |
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{ |
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return ScriptType::MULTISIG; |
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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 $this->m; |
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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 $this->n; |
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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 $publicKey) |
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{ |
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$buffer = $this->pubKeySerializer->serialize($publicKey); |
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foreach ($this->keyBuffers as $key) { |
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if ($key->equals($buffer)) { |
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return true; |
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} |
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} |
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return false; |
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} |
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/** |
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* @return array|BufferInterface[] |
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*/ |
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public function getKeyBuffers() |
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{ |
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return $this->keyBuffers; |
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} |
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} |
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Bit-Wasp /
bitcoin-php
