/**
* Solves a certain challenge.
*
* Return false if not possible.
*
* @param Challenge $challenge
* @param array $payload
*
* @return bool
*/
public final function solve(Challenge $challenge, $payload = [])
{
$this->request = new Request(['solver' => __CLASS__, 'expires_at' => $challenge->getExpires(), 'hostname_id' => $challenge->getCertificate()->getIdentifier()]);
$this->request->save();
// forward the request to the extended class
$this->handle();
}
