EthB.php

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<?php

namespace Ethereum\DataType;

use Math_BigInteger;

class EthB extends EthQ
{
    public function validate($val, array $params)
    {
        $params['abi'] = 'uint8';

        if (is_bool($val)) {
            $val = (int)$val;
        }

        $big_int = parent::validate($val, $params = ['abi' => 'uint8']);
        $int = (int)$big_int->toString();
        if (!($int === 1 || $int === 0)) {
            throw new \InvalidArgumentException('Can not decode bool value : ' . $val);
        }
        $this->abi = 'bool';

        return $big_int;
    }

    public function val()
    {
        return (bool)$this->value->toString();
    }
}