Paya Gateway - JAVA Direct API Sample - Sale

Main.java

///*----------------------------------------------
//Author: Thomas Hagan
//Company: Paya
//Contact: sdksupport@paya.com
//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
//!!! Samples intended for educational use only!!!
//!!!        Not intended for production       !!!
//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
//-----------------------------------------------*/

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.nio.file.Path;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.nio.charset.StandardCharsets;
import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
import java.util.Base64;


public class Main {

	public static void main(String[] args) throws Exception {

	  try {

		//Set Variables
		String merchantID = "173859436515";
		String merchantKey = "P1J2V8P2Q3D8";
		String clientID = "W8yvKQ5XbvAn7dUDJeAnaWCEwA4yXEgd";
		String clientSecret = "iLzODV5AUsCGWGkr";
		String verb = "POST";
		String host = "https://api-cert.sagepayments.com/bankcard/v1/charges";
		String query = "?type=Sale";
    String endpoint = host + query;
		long epoch = System.currentTimeMillis()/1000;
		String timestamp = Long.toString(epoch);
		String nonce = timestamp;
		
		String body = new String(Files.readAllBytes(Paths.get("request.json")), StandardCharsets.UTF_8);
    System.out.println("Body:");
    System.out.println(body);
		
		// Build string to be hashed comprised of the verb, url, request body, Merchant ID, // nonce, and the timestamp.
		String authToken = verb + endpoint + body + merchantID + nonce + timestamp;
    System.out.println("authToken:");
    System.out.println(authToken);
		
		// Create authorization
    final String HMAC_SHA512 = "HmacSHA512";
		Mac hasher = Mac.getInstance(HMAC_SHA512);
		hasher.init(new SecretKeySpec(clientSecret.getBytes(), HMAC_SHA512));
		byte[] hash = hasher.doFinal((authToken.toString()).getBytes());
		//String hmac = Base64.encode(hash);
    String hmac = Base64.getEncoder().encodeToString(hash);
    System.out.println("HMAC:");
    System.out.println(hmac);
		
		
		URL url = new URL(endpoint);
		HttpURLConnection conn = (HttpURLConnection) url.openConnection();
		conn.setDoOutput(true);
		conn.setRequestMethod("POST");
		conn.setRequestProperty("authorization", hmac);
		conn.setRequestProperty("merchantid", merchantID);
    conn.setRequestProperty("merchantkey", merchantKey);
		conn.setRequestProperty("clientid", clientID);
		conn.setRequestProperty("nonce", nonce);
		conn.setRequestProperty("timestamp", timestamp);
		conn.setRequestProperty("cache-control", "no-cache");
		conn.setRequestProperty("Content-Type", "application/json");

		

		String input = body;

		OutputStream os = conn.getOutputStream();
		os.write(input.getBytes());
		os.flush();

		if (conn.getResponseCode() != HttpURLConnection.HTTP_CREATED) {
			throw new RuntimeException("Failed : HTTP error code : "
				+ conn.getResponseCode() + " Server Response: " + conn.getResponseMessage());
		}

		BufferedReader br = new BufferedReader(new InputStreamReader(
				(conn.getInputStream())));

		String output;
		System.out.println("Output from Server .... \n");
		while ((output = br.readLine()) != null) {
			System.out.println(output);
		}

		conn.disconnect();

	  } catch (MalformedURLException e) {

		e.printStackTrace();

	  } catch (IOException e) {

		e.printStackTrace();

	 }

	}

}

request.json

{
"eCommerce": {
  "amounts": {
    "total": 7.00,
    "tax": 0,
    "shipping": 0
  },
  "orderNumber": "SDK Invoice 123",
  "cardData": {
  "number": "5454545454545454",
  "expiration": "1230",
  "cvv": "123"
  },
  "customer": {
    "email": "kur@foo.com",
    "telephone": "8885555555",
    "fax": "8885555555"
  },
  "billing": {
    "name": "John Smith",
    "address": "123 Main St",
    "city": "Savannah",
    "state": "GA",
    "postalCode": "31405",
    "country": "USA"
  },
  "shipping": {
    "name": "John Smith",
    "address": "123 Main St",
    "city": "Savannah",
    "state": "GA",
    "postalCode": "31405",
    "country": "USA"
  }
},
"vault": {
  "operation": "create"
}
}