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

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

SDK Tutorial

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

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

Installation

Manual

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

Initializing UniPayment client

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

configuration = new Configuration();
configuration.setClientId("client id");
configuration.setClientSecret("client secret");
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.setClientId("client id");
configuration.setClientSecret("client secret");
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()
            .appId("payment app id")
            .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.setClientId("client id");
configuration.setClientSecret("client secret");
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.setClientId("client id");
configuration.setClientSecret("client secret");
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

License

MIT License

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Resource

GitHub