/**
* @param \BitWasp\Bitcoin\Script\Interpreter\Number $sequence
* @return bool
*/
private function checkSequence(Number $sequence)
{
$txSequence = $this->transaction->getInput($this->inputToSign)->getSequence();
if ($this->transaction->getVersion() < 2) {
return false;
}
if ($this->math->cmp($this->math->bitwiseAnd($txSequence, TransactionInputInterface::SEQUENCE_LOCKTIME_DISABLE_FLAG), 0) !== 0) {
return 0;
}
$mask = $this->math->bitwiseOr(TransactionInputInterface::SEQUENCE_LOCKTIME_TYPE_FLAG, TransactionInputInterface::SEQUENCE_LOCKTIME_MASK);
return $this->verifyLockTime($this->math->bitwiseAnd($txSequence, $mask), TransactionInputInterface::SEQUENCE_LOCKTIME_TYPE_FLAG, Number::int($this->math->bitwiseAnd($sequence->getInt(), $mask)));
}
/**
* @param Buffer $buffer
* @return int
*/
private function parseBuffer(Buffer $buffer)
{
$size = $buffer->getSize();
if ($size === 0) {
return '0';
}
$chars = array_map(function ($binary) {
return ord($binary);
}, str_split($buffer->flip()->getBinary(), 1));
$result = 0;
for ($i = 0; $i < $size; $i++) {
$mul = $this->math->mul($i, 8);
$byte = $this->math->leftShift($chars[$i], $mul);
$result = $this->math->bitwiseOr($result, $byte);
}
if ($chars[0] & 0x80) {
$mask = gmp_strval(gmp_com($this->math->leftShift(0x80, 8 * ($size - 1))), 10);
return $this->math->sub(0, $this->math->bitwiseAnd($result, $mask));
}
return $result;
}
