public function findNextTxId()
{
$uid = \Auth::user()->getAuthIdentifier();
$transfers = count(Transaction::query()->where('buyer_id', $uid)->where('provider', $this->getName())->get('txid'));
return "U{$uid}TX{$transfers}A0";
}
/**
* @param Authenticatable $user
* @return string|null
*/
public static function getUserTier(Authenticatable $user)
{
$tx = Transaction::where('buyer_id', $user->getAuthIdentifier())->first();
return isset($tx) ? $tx->product : null;
}
