Java is a powerful general-purpose programming language. It is used to develop desktop and mobile applications, big data processing, embedded systems, and so on. According to Oracle, the company that owns Java, Java runs on 3 billion devices worldwide, which makes Java one of the most popular programming languages.

You can easily integrate crypto payments into your own website or app with our UniPayment Java SDK, after installation you can start accepting crypto-payments.

UniPayment Java Client

GitHub license

A Java client for the UniPayment Client API.

This SDK provides a convenient abstraction of UniPayment's Gateway API and allows developers to focus on payment flow/e-commerce integration rather than on the specific details of client-server interaction using the raw API.

Getting Started

Before using the UniPayment API, sign up for your API key.

If you want to use the Sandbox, sign up here.

Installation

Manual

  1. Download the package and extract it into a local directory or clone the repo.
  2. Copy unipayment-client.

Initializing UniPayment client

import io.unipayment.client.Configuration;
import io.unipayment.client.UniPaymentClient;

configuration = new Configuration();
configuration.setAppId("appId");
configuration.setApiKey("apiKey");
configuration.setApiVersion("1.0");
configuration.setBaseUrl("https://api.unipayment.io");
configuration.setDebug(true);


client = UniPaymentClient.getInstance(configuration);

Sandbox is used in the same way with sandbox api host.

import io.unipayment.client.Configuration;
import io.unipayment.client.UniPaymentClient;

configuration = new Configuration();
configuration.setAppId("appId");
configuration.setApiKey("apiKey");
configuration.setApiVersion("1.0");
configuration.setBaseUrl("https://sandbox-api.unipayment.io");
configuration.setDebug(true);


client = UniPaymentClient.getInstance(configuration);

Create an invoice

Reference：https://unipayment.readme.io/reference/create_invoice

import io.unipayment.client.Configuration;
import io.unipayment.client.UniPaymentClient;
import io.unipayment.client.models.*;

CreateInvoiceRequest createInvoiceRequest = CreateInvoiceRequest.builder()
            .priceAmount(2d)
            .priceCurrency("USD")
            .payCurrency("USDT")
            .orderId("ORDER_123456")
            .redirectURL("https://example.com/redirect")
            .notifyURL("https://example.com/notify")
            .title("Test Invoice")
            .description("Test Desc")
            .lang("en-US")
            .build();

configuration = new Configuration();
configuration.setAppId("appId");
configuration.setApiKey("apiKey");
configuration.setApiVersion("1.0");
configuration.setBaseUrl("https://sandbox-api.unipayment.io");
configuration.setDebug(true);


client = UniPaymentClient.getInstance(configuration);

Response<InvoiceModel> response = client.createInvoice(configuration.getApiVersion(), createInvoiceRequest);

CreateInvoiceResponse

{
"code": "OK",
"msg": "",
    "data": {
        "app_id": "cee1b9e2-d90c-4b63-9824-d621edb38012",
        "invoice_id": "Dj2mNCXXWCGKT89kcU8NJn",
        "order_id": "ORDER_123456",
        "price_amount": 2.0,
        "price_currency": "USD",
        "network": null,
        "address": null,
        "pay_amount": 0.0,
        "pay_currency": null,
        "exchange_rate": 0.0,
        "paid_amount": 0.0,
        "create_time": "2022-09-14T06:31:57",
        "expiration_time": "2022-09-14T06:36:57",
        "confirm_speed": 2,
        "status": 1,
        "error_status": 0,
        "invoice_url": "https://sandbox-app.unipayment.io/i/Dj2mNCXXWCGKT89kcU8NJn"
    }
}

Handle IPN

Reference：https://unipayment.readme.io/reference/ipn-check

Invoice Status: https://unipayment.readme.io/reference/invoice-status

IPNs (Instant Payment Notifications) are sent to the notify_url when order status is changed to paid, confirmed and complete. 

import io.unipayment.client.Configuration;
import io.unipayment.client.UniPaymentClient;

configuration = new Configuration();
configuration.setAppId("appId");
configuration.setApiKey("apiKey");
configuration.setApiVersion("1.0");
configuration.setBaseUrl("https://sandbox-api.unipayment.io");
configuration.setDebug(true);


client = UniPaymentClient.getInstance(configuration);

String notify = "ipn notify from unipayment";
Response<CheckIPNResponse> response = uniPaymentClient.checkIPN(configuration.getApiVersion(), notify);

if(response.getCode().equals("OK"))
{
    // handle business logic
    return "SUCCESS"
}

IPN notify

{
    "ipn_type": "invoice",
    "event": "invoice_expired",
    "app_id": "cee1b9e2-d90c-4b63-9824-d621edb38012",
    "invoice_id": "3Q7fyLnB2YNhUDW1fFNyEz",
    "order_id": "20",
    "price_amount": 6.0,
    "price_currency": "SGD",
    "network": null,
    "address": null,
    "pay_currency": null,
    "pay_amount": 0.0,
    "exchange_rate": 0.0,
    "paid_amount": 0.0,
    "confirmed_amount": 0.0,
    "refunded_price_amount": 0.0,
    "create_time": "2022-09-12T03:36:03",
    "expiration_time": "2022-09-12T03:41:03",
    "status": "Expired",
    "error_status": "None",
    "ext_args": null,
    "transactions": null,
    "notify_id": "8ccd2b61-226b-48e5-99b8-acb1f350313e",
    "notify_time": "2022-09-12T03:56:10.5852752Z"
}

Run Example

1.Get source code form GitHub 

git clone https://github.com/UniCryptoLab/UniPaymentClient.Java.git

2.Run example in Intellij IDE