src/FintechFab/QiwiSdk/Gateway.php
private function checkAuth($requestParams)
	{
		$sign = $this->getSignForAuth();

		if ($sign != '' && $sign != null) {
			return $this->isCorrectSign($sign, $requestParams);
		}

		$providerData = $this->getProviderForAuth();

		if ($providerData) {

			if (self::getConfig('provider.id') == $providerData['login']
				&& self::getConfig('provider.password') == $providerData['password']
			) {
				return true;
			}
		}

		return false;
	}
private function checkAuth($requestParams)
	{
		$sign = $this->getSignForAuth();

		if ($sign != '' && $sign != null) {
			return $this->isCorrectSign($sign, $requestParams);
		}

		$providerData = $this->getProviderForAuth();

		if ($providerData) {

			if (self::getConfig('provider.id') == $providerData['login']
				&& self::getConfig('provider.password') == $providerData['password']
			) {
				return true;
			}
		}

		return false;
	}
Проверка авторизации

@param $requestParams

@return bool