/**
* @return bool
*/
public function isMultisig()
{
if (count($this->decoded) < 3) {
return false;
}
$final = end($this->decoded);
if (!$final || !$final->isPush()) {
return false;
}
$script = new Script($final->getData());
$decoded = $script->getScriptParser()->decode();
$count = count($decoded);
$mOp = $decoded[0];
$nOp = $decoded[$count - 2];
if ($mOp->isPush() || $nOp->isPush()) {
return false;
}
if ($mOp->getOp() < Opcodes::OP_0 || $nOp->getOp() > Opcodes::OP_16) {
return false;
}
/** @var Operation[] $keys */
$keys = array_slice($decoded, 1, -2);
$keysValid = true;
foreach ($keys as $key) {
$keysValid &= $key->isPush() && PublicKey::isCompressedOrUncompressed($key->getData());
}
return $keysValid;
}
/**
* @param BufferInterface $publicKey
* @param int $flags
* @return $this
* @throws \Exception
*/
public function checkPublicKeyEncoding(BufferInterface $publicKey, $flags)
{
if (($flags & Interpreter::VERIFY_STRICTENC) != 0 && !PublicKey::isCompressedOrUncompressed($publicKey)) {
throw new ScriptRuntimeException(Interpreter::VERIFY_STRICTENC, 'Public key with incorrect encoding');
}
return $this;
}
/**
* @param Buffer $publicKey
* @return $this
* @throws \Exception
*/
public function checkPublicKeyEncoding(Buffer $publicKey)
{
if ($this->flags->checkFlags(self::VERIFY_STRICTENC) && !PublicKey::isCompressedOrUncompressed($publicKey)) {
throw new ScriptRuntimeException(self::VERIFY_STRICTENC, 'Public key with incorrect encoding');
}
return $this;
}
/**
* @return bool
*/
public function isMultisig()
{
$count = count($this->decoded);
if ($count <= 3) {
return false;
}
$mOp = $this->decoded[0];
$nOp = $this->decoded[$count - 2];
$checksig = $this->decoded[$count - 1];
if ($mOp->isPush() || $nOp->isPush() || $checksig->isPush()) {
return false;
}
/** @var Operation[] $vKeys */
$vKeys = array_slice($this->decoded, 1, -2);
foreach ($vKeys as $key) {
if (!$key->isPush() || !PublicKey::isCompressedOrUncompressed($key->getData())) {
return false;
}
}
return $mOp->getOp() >= Opcodes::OP_0 && $nOp->getOp() <= Opcodes::OP_16 && $checksig->getOp() === Opcodes::OP_CHECKMULTISIG;
}
