/**
* @param BufferInterface $vch
* @param bool $fRequireMinimal
* @param int $maxNumSize
* @param Math|null $math
* @return self
*/
public static function buffer(BufferInterface $vch, $fRequireMinimal, $maxNumSize = self::MAX_NUM_SIZE, Math $math = null)
{
$size = $vch->getSize();
if ($size > $maxNumSize) {
throw new \RuntimeException('Script number overflow');
}
if ($fRequireMinimal && $size > 0) {
$binary = $vch->getBinary();
if (ord($binary[$size - 1]) & 0x7f === 0) {
if ($size <= 1 || ord($binary[$size - 2]) & 0x80 === 0) {
throw new \RuntimeException('Non-minimally encoded script number');
}
}
}
$math = $math ?: Bitcoin::getMath();
$number = new self(0, $math);
$number->number = $number->parseBuffer($vch);
return $number;
}
