$bip44 = HierarchicalKeyFactory::fromExtended($result['masterPrivKey']);

$publicKey = $bip44->derivePath("m/44'/0'/0'")->toExtendedPublicKey();

$masterkey = HierarchicalKeyFactory::fromExtended($publicKey);

    $result['address'] = $masterkey->derivePath("m/0/1")->getPublicKey()->getAddress()->getAddress();