OPay E-Wallet Payments API

                                    
                                        import com.google.gson.Gson;
                                        import org.apache.commons.codec.binary.Hex;
                                        import javax.crypto.Mac;
                                        import javax.crypto.spec.SecretKeySpec;
                                        import java.io.BufferedReader;
                                        import java.io.InputStreamReader;
                                        import java.io.OutputStream;
                                        import java.net.HttpURLConnection;
                                        import java.net.URL;
                                        import java.nio.charset.StandardCharsets;
                                        import java.util.TreeMap;
                                        import java.util.UUID;

                                        public class Mwallet {

                                            private static final String privateKey = "OPAYPRV*******0187828";

                                            private static final String endpoint = "https://sandboxapi.opaycheckout.com";

                                            private static final String merchantId = "256621051120756";

                                            public static void main(String[] args) throws Exception {
                                                String addr = endpoint + "/api/v1/international/payment/create";
                                                Gson gson = new Gson();
                                                TreeMap order = new TreeMap<>();
                                                TreeMap amount = new TreeMap<>();
                                                amount.put("currency","EGP");
                                                amount.put("total",new Integer(400));
                                                order.put("amount",amount);
                                                order.put("callbackUrl","https://your-call-back-url.com");
                                                order.put("country","EG");
                                                order.put("payMethod","MWALLET");
                                                TreeMap product = new TreeMap<>();
                                                product.put("description","description");
                                                product.put("name","name");
                                                order.put("product",product);
                                                order.put("reference", UUID.randomUUID().toString());
                                                TreeMap userInfo = new TreeMap<>();
                                                userInfo.put("userEmail","customer@email.com");
                                                userInfo.put("userMobile","201066668888");
                                                userInfo.put("userName","OPay Test Name");
                                                order.put("userInfo",userInfo);
                                                order.put("walletAccount","01066668888");

                                                String requestBody = gson.toJson(order);
                                                System.out.println("--request:");
                                                System.out.println(requestBody);
                                                String oPaySignature = hmacSHA512(requestBody, privateKey);
                                                System.out.println("--signature:");
                                                System.out.println(oPaySignature);

                                                URL url = new URL(addr);
                                                HttpURLConnection con = (HttpURLConnection)url.openConnection();
                                                con.setRequestMethod("POST");
                                                con.setRequestProperty("Content-Type", "application/json; utf-8");
                                                con.setRequestProperty("Authorization", "Bearer "+oPaySignature);
                                                con.setRequestProperty("MerchantId", merchantId);
                                                con.setDoOutput(true);
                                                OutputStream os = con.getOutputStream();
                                                byte[] input = requestBody.getBytes(StandardCharsets.UTF_8);
                                                os.write(input, 0, input.length);
                                                BufferedReader br = new BufferedReader(new InputStreamReader(con.getInputStream(), StandardCharsets.UTF_8));
                                                StringBuilder response = new StringBuilder();
                                                String responseLine = null;
                                                while ((responseLine = br.readLine()) != null) {
                                                    response.append(responseLine.trim());
                                                }

                                                System.out.println("--response:");
                                                System.out.println(response.toString());
                                                //close your stream and connection
                                            }

                                            public static String hmacSHA512(final String data, final String secureKey) throws Exception{
                                                byte[] bytesKey = secureKey.getBytes();
                                                final SecretKeySpec secretKey = new SecretKeySpec(bytesKey, "HmacSHA512");
                                                Mac mac = Mac.getInstance("HmacSHA512");
                                                mac.init(secretKey);
                                                final byte[] macData = mac.doFinal(data.getBytes());
                                                byte[] hex = new Hex().encode(macData);
                                                return new String(hex, StandardCharsets.UTF_8);
                                            }
                                        }

                                    
                                

                                    
                                        using System;
                                        using System.IO;
                                        using System.Linq;
                                        using System.Net;
                                        using System.Text;
                                        using Newtonsoft.Json;
                                        namespace OPayRequest
                                        {
                                            public class Program
                                            {
                                                static void Main(string[] args)
                                                {
                                                    PostJson("https://sandboxapi.opaycheckout.com/api/v1/international/payment/create", new opay_request
                                                    {
                                                        reference    = '12312321324',
                                                        amount= {
                                                            "total"= '400',
                                                            "currency"= 'EGP',
                                                        },
                                                        product= {
                                                            "name"= 'Iphone X',
                                                            "description"= 'xxxxxxxxxxxxxxxxx',
                                                        },
                                                        callbackUrl  = 'your callbackUrl',
                                                        country = 'EG';
                                                        expireAt = ':30';
                                                        merchantName = 'your merchant name';
                                                        payMethod = 'MWALLET';
                                                        walletAccount = '01066668888';
                                                        userInfo = {
                                                                    "userName": 'your customer name',
                                                                    "userMobile": '201312312xxx',
                                                                    "userEmail": 'xxx@xxx.com',
                                                            },
                                                    });
                                                }

                                                private static void PostJson(string uri, opay_request postParameters)
                                                {
                                                    string postData = JsonConvert.SerializeObject(postParameters);
                                                    byte[] bytes = Encoding.UTF8.GetBytes(postData);
                                                    var httpWebRequest = (HttpWebRequest) WebRequest.Create(uri);
                                                    httpWebRequest.Method = "POST";
                                                    httpWebRequest.ContentLength = bytes.Length;
                                                    httpWebRequest.ContentType = "text/json";
                                                    using (Stream requestStream = httpWebRequest.GetRequestStream())
                                                    {
                                                        requestStream.Write(bytes, 0, bytes.Count());
                                                    }
                                                    var httpWebResponse = (HttpWebResponse) httpWebRequest.GetResponse();
                                                    if (httpWebResponse.StatusCode != HttpStatusCode.OK)
                                                    {
                                                        string message = String.Format("GET failed. Received HTTP {0}", httpWebResponse.StatusCode);
                                                        throw new ApplicationException(message);
                                                    }
                                                }
                                            }

                                            public class opay_request
                                            {
                                                public string reference { get; set; }
                                                public string callbackUrl { get; set; }
                                                public string expireAt { get; set; }
                                                public string country { get; set; }
                                                public string expireAt { get; set; }
                                                public string merchantName { get; set; }
                                                public string payMethod { get; set; }
                                                public string walletAccount { get; set; }
                                                public product product;
                                                public amount amount;
                                                public userInfo userInfo;

                                            }
                                            public class amount
                                            {
                                                 public string total { get; set; }
                                                 public string currency { get; set; }
                                            }
                                        public class product
                                            {
                                                 public string name { get; set; }
                                                 public string description { get; set; }
                                            }
                                        public class userInfo
                                            {
                                                 public string userName { get; set; }
                                                 public string userEmail { get; set; }
                                                 public string userMobile { get; set; }
                                            }
                                        }