/**
* Set that this key should be compressed
*
* @param boolean $setting
* @return $this
* @throws \Exception
*/
public function setCompressed($setting)
{
$this->compressed = $setting;
$this->getPublicKey();
$this->publicKey->setCompressed($setting);
return $this;
}
/**
* @return bool
*/
public function isMultisig()
{
$opCodes = $this->script->getOpcodes();
$count = count($this->evalScript);
if ($count <= 3) {
return false;
}
$mOp = $this->evalScript[0];
$nOp = $this->evalScript[$count - 2];
$lastOp = $this->evalScript[$count - 1];
$keys = array_slice($this->evalScript, 1, -2);
$keysValid = function () use($keys) {
$valid = true;
foreach ($keys as $key) {
$valid &= $key instanceof Buffer && PublicKey::isCompressedOrUncompressed($key);
}
return $valid;
};
return $count >= 2 && is_string($mOp) && is_string($nOp) && is_string($lastOp) && $opCodes->cmp($opCodes->getOpByName($mOp), 'OP_0') >= 0 && $opCodes->cmp($opCodes->getOpByName($nOp), 'OP_16') <= 0 && $this->evalScript[$count - 1] == 'OP_CHECKMULTISIG' && $keysValid();
}
/**
* @return bool
*/
public function isMultisig()
{
if (count($this->evalScript) < 3) {
return false;
}
$final = end($this->evalScript);
if (!$final || !$final instanceof Buffer) {
return false;
}
$script = new Script($final);
$parsed = $script->getScriptParser()->parse();
$count = count($parsed);
$opCodes = $script->getOpCodes();
$mOp = $parsed[0];
$nOp = $parsed[$count - 2];
$keys = array_slice($parsed, 1, -2);
$keysValid = true;
foreach ($keys as $key) {
$keysValid &= $key instanceof Buffer && PublicKey::isCompressedOrUncompressed($key);
}
return $opCodes->cmp($opCodes->getOpByName($mOp), 'OP_0') >= 0 && $opCodes->cmp($opCodes->getOpByName($nOp), 'OP_16') <= 0 && $keysValid;
}
/**
* @param Buffer $publicKey
* @return bool
*/
public function validatePublicKey(Buffer $publicKey)
{
if (PublicKey::isCompressedOrUncompressed($publicKey)) {
try {
$this->publicKeyFromBuffer($publicKey);
return true;
} catch (\Exception $e) {
// Let the function finish and return false
}
}
return false;
}
/**
* @param Buffer $publicKey
* @return $this
* @throws \Exception
*/
public function checkPublicKeyEncoding(Buffer $publicKey)
{
if ($this->flags->checkFlags(InterpreterInterface::VERIFY_STRICTENC) && !PublicKey::isCompressedOrUncompressed($publicKey)) {
throw new ScriptRuntimeException(InterpreterInterface::VERIFY_STRICTENC, 'Public key with incorrect encoding');
}
return $this;
}
