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<?php |
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declare(strict_types=1); |
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namespace R3bers\BittrexApi\Middleware; |
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use Closure; |
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use Psr\Http\Message\RequestInterface; |
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class Authentication |
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{ |
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/** @var string */ |
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private $key; |
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/** @var string */ |
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private $secret; |
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/** @var string */ |
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private $subaccountId; |
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/** |
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* Authentication constructor. |
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* @param string $key |
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* @param string $secret |
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* @param string $subaccountId |
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*/ |
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public function __construct(string $key, string $secret, ?string $subaccountId = null) |
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{ |
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$this->key = $key; |
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$this->secret = $secret; |
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$this->subaccountId = $subaccountId; |
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} |
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/** |
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* @param callable $next |
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* @return Closure |
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*/ |
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public function __invoke(callable $next) |
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{ |
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return function (RequestInterface $request, array $options = []) use ($next) { |
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$timestamp = round(microtime(true) * 1000); |
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$contentHash = $this->generateContentHash($request->getBody()->__toString()); |
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$pre_sign = $timestamp . |
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$request->getUri()->__toString() . |
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$request->getMethod() . |
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$contentHash . |
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$this->subaccountId; |
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$sign = $this->generateSign($pre_sign); |
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$request = $request->withAddedHeader('Api-Key', $this->key); |
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$request = $request->withAddedHeader('Api-Timestamp', $timestamp); |
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$request = $request->withAddedHeader('Api-Content-Hash', $contentHash); |
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$request = $request->withAddedHeader('Api-Signature', $sign); |
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if (!is_null($this->subaccountId)) { |
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$request = $request->withAddedHeader('Api-Subaccount-Id', $this->subaccountId); |
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} |
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return $next($request, $options); |
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}; |
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} |
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/** |
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* @param string $content |
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* @return string |
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*/ |
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private function generateContentHash(string $content): string |
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{ |
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return hash('sha512', $content); |
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} |
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/** |
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* @param string $preSign |
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* @return string |
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*/ |
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private function generateSign(string $preSign): string |
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{ |
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return hash_hmac('sha512', $preSign, $this->secret); |
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} |
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} |
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r3bers /
bittrex-api
