cryptopay.php

<?php

/* Class */
class Cryptopay
{
	const URL       = 'https://cryptopay.me/api/v1';
	const VERSION   = '1.0';
	private $api_key;

	function __construct($key)
	{
		$this->api_key = $key;
	}

	private function request ($method, $url, $data = array())
	{
		if (!empty($data))
		{
			if (isset($data['callback_params']))
			{
				foreach($data['callback_params'] AS $name => $value)
				{
					$data["callback_params[$name]"] = $value;
				}

				unset($data['callback_params']);
			}

			$data['api_key'] = $this->api_key;
			$data = http_build_query($data);
		}

		try
		{
			if (!$curl = curl_init())
			{
				throw new Exception('Module CURL is not initialized');
			}

			curl_setopt($curl, CURLOPT_URL, self::URL . $url);

			if ($method === 'POST')
			{
				curl_setopt($curl, CURLOPT_POST, true);
				curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
			}

			curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
			curl_setopt($curl, CURLOPT_USERAGENT, 'Cryptopay PHP API Client '. self::VERSION);

			if (!$out = curl_exec($curl))
			{
				$error = json_encode(curl_error($curl) .' ('. curl_errno($curl) .')');
				throw new Exception($error);
			}

			$response_code = curl_getinfo($curl, CURLINFO_HTTP_CODE);
			if (!($response_code >= 200 && $response_code < 300))
			{
				$errors['error_code'] = $response_code;
				if (is_object(json_decode($out)) && !empty($out))
				{
					foreach (json_decode($out) AS $error_name => $error_mess)
					{
						$errors[$error_name] = ($error_name != 'error') ? $error_mess[0] : $error_mess;
					}
				}
				throw new Exception(json_encode($errors));
			}

			curl_close($curl);
		}
		catch (Exception $e)
		{
			$out = $e->getMessage();
		}

		return json_decode($out, true);
	}

	public function invoice ($data)
	{
		return $this->request('POST', '/invoices', $data);
	}

	public function button ($data, $name = '')
	{
		$button_data = $this->request('POST', '/buttons', $data);

		if($name == '') $name = '<img src="https://cryptopay.me/assets/pay-btns/btn-sm-green.png">';

		$button = '<a data-cryptopay-token="'. $button_data['token'] .'" href="#">'. $name .'</a><script src="https://cryptopay.me/assets/button.js"></script>';

		return $button;
	}

	public function hosted ($data)
	{
		$hosted = $this->request('POST', '/hosted', $data);
		return $hosted['url'];
	}

	public function invoices ()
	{
		return $this->request('GET', '/invoices?api_key='. $this->api_key);
	}

	public function rate ()
	{
		return $this->request('GET', '/cryptopay_rate');
	}

	public function validate_hash ($data)
	{
		$required_parameters = array('uuid', 'price', 'currency');

		try
		{
			$errors = array();
			foreach($required_parameters AS $parameter)
			{
				if(!array_key_exists($parameter, $data))
				{
					$errors[] = 'Not passed as parameter: '. $parameter;
				}
			}

			if (!empty($errors)) throw new Exception(implode("\n", $errors));

			$price_cents = $data['price'] * 100;
			$validate_str = "{$this->api_key}_{$data['uuid']}_$price_cents{$data['currency']}";

			$result = sha1($validate_str);
		}
		catch (Exception $e)
		{
			$result = $e->getMessage();
		}
		return $result;
	}
}