update readme

README.md

@@ -1,2 +1,63 @@
-# tripay-sdk-php
+<h1 align="center">tripay-sdk-php</h1>
-Unofficial TriPay.co.id Integration Kit for PHP
+<h6 align="center">Unofficial TriPay.co.id Integration Kit for PHP</h6>
+
+<p align="center">
+  <img src="https://img.shields.io/github/v/release/zerosdev/tripay-sdk-php?include_prereleases" alt="release"/>
+  <img src="https://img.shields.io/github/languages/top/zerosdev/tripay-sdk-php" alt="language"/>
+  <img src="https://img.shields.io/github/license/zerosdev/tripay-sdk-php" alt="license"/>
+  <img src="https://img.shields.io/github/languages/code-size/zerosdev/tripay-sdk-php" alt="size"/>
+  <img src="https://img.shields.io/github/downloads/zerosdev/tripay-sdk-php/total" alt="downloads"/>
+  <img src="https://img.shields.io/badge/PRs-welcome-brightgreen.svg" alt="pulls"/>
+</p>
+
+## Requirements
+- PHP v7.2+
+- PHP JSON Extension
+- PHP cURL Extension
+
+## Installation
+
+1. Run command
+```
+composer require zerosdev/tripay-sdk-php
+```
+
+## Usage
+
+```php
+<?php
+
+require 'path/to/your/vendor/autoload.php';
+
+use ZerosDev\TriPay\Client as TriPayClient;
+use ZerosDev\TriPay\Support\Constant;
+use ZerosDev\TriPay\Transaction;
+
+$merchantCode = 'T12345';
+$apiKey = 'd1cfd***********888ed3';
+$privateKey = 'd1cfd***********888ed3';
+$mode = Constant::MODE_DEVELOPMENT;
+$guzzleOptions = []; // Your additional Guzzle options (https://docs.guzzlephp.org/en/stable/request-options.html)
+
+$client = new TriPayClient($merchantCode, $apiKey, $privateKey, $mode, $guzzleOptions);
+$transaction = new Transaction($client);
+
+$result = $transaction
+    ->addOrderItem('Gula', 10000, 1)
+    ->addOrderItem('Kopi', 6000, 1)
+    ->create([
+        'method' => 'BRIVA',
+        'customer_name' => 'Nama Pelanggan',
+        'customer_email' => 'email@konsumen.id',
+    ]);
+
+echo $result->getBody()->getContents();
+
+/**
+* For debugging purpose
+*/
+$debugs = $client->debugs();
+echo json_encode($debugs, JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES);
+```
+
+Please check the `/examples` for the other examples