/**
* @param Buffer $bits
* @return string
*/
public function getDifficulty(Buffer $bits)
{
$target = $this->getTarget($bits);
$lowest = $this->getMaxTarget();
$lowest = $this->math->mul($lowest, $this->math->pow(10, self::DIFF_PRECISION));
$difficulty = str_pad($this->math->div($lowest, $target), self::DIFF_PRECISION + 1, '0', STR_PAD_LEFT);
$intPart = substr($difficulty, 0, 0 - self::DIFF_PRECISION);
$decPart = substr($difficulty, 0 - self::DIFF_PRECISION, self::DIFF_PRECISION);
return $intPart . '.' . $decPart;
}
/**
* @param BufferInterface $buffer
* @return int
*/
private function parseBuffer(BufferInterface $buffer)
{
$size = $buffer->getSize();
if ($size === 0) {
return '0';
}
$chars = array_map(function ($binary) {
return ord($binary);
}, str_split($buffer->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[count($chars) - 1] & 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;
}
/**
* @param int|string $amount
* @return bool
*/
public function checkAmount($amount)
{
return $this->math->cmp($amount, $this->math->mul($this->params->maxMoney(), Amount::COIN)) < 0;
}
