add ability to complete 3DS 2 transaction, closes #28

readme.md

@@ -133,6 +133,7 @@ Spreedly::transaction()->purchase();
 Spreedly::transaction()->void();
 Spreedly::transaction()->credit();
 Spreedly::transaction()->capture();
+Spreedly::transaction()->complete();
 ```
 
 ## Changelog

spec/Tuurbo/Spreedly/TransactionSpec.php

@@ -144,6 +144,15 @@ public function it_captures_a_specific_authorized_amount($client)
         $this->capture($amount)->shouldReturnAnInstanceOf('Tuurbo\Spreedly\Client');
     }
 
+    public function it_completes_a_3ds2_transaction($client)
+    {
+        $client->post('v1/transactions/'.self::TRANSACTION_TOKEN.'/complete.json')
+            ->shouldBeCalled()
+            ->willReturn($client);
+
+        $this->complete()->shouldReturnAnInstanceOf('Tuurbo\Spreedly\Client');
+    }
+
     public function it_throws_invalid_method_exception()
     {
         $this->shouldThrow('Tuurbo\Spreedly\Exceptions\InvalidPaymentMethodException')

src/Transaction.php

@@ -278,6 +278,29 @@ public function void(array $data = [])
         return $this->client->post('v1/transactions/'.$this->transactionToken.'/void.json', $data);
     }
 
+    /**
+     * Can be used to Completes a 3DS 2 transaction in the device fingerprint stage
+     * See docs for more information.
+     *
+     * <code>
+     *		// Completes a 3DS 2 transaction in the device fingerprint stage.
+     *		Spreedly::transaction($transactionToken)->complete();
+     * </code>
+     *
+     *
+     * @return mixed
+     *
+     * @throws Exceptions\MissingTransactionTokenException
+     */
+    public function complete()
+    {
+        if (!$this->transactionToken) {
+            throw new Exceptions\MissingTransactionTokenException();
+        }
+
+        return $this->client->post('v1/transactions/'.$this->transactionToken.'/complete.json');
+    }
+
     /**
      * @param string $method
      * @param array  $parameters