update README.md

README.md

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 <h1 align="center">teikun86/tripay-laravel</h1>
 
-###### Unofficial TriPay Payment Gateway & PPOB integration for Laravel. <br> Inspired from [zerosdev/tripay-sdk-php](https://github.com/zerosdev/tripay-sdk-php)
+<h6 align="center"> Unofficial TriPay Payment Gateway & PPOB integration for Laravel.</h6>
+
+<p align="center">
+    <img src="https://img.shields.io/github/v/release/teikun-86/tripay-laravel?include_prereleases" alt="release"/>
+    <img src="https://img.shields.io/github/languages/top/teikun-86/tripay-laravel" alt="languages"/>
+    <img alt="Packagist Downloads" src="https://img.shields.io/packagist/dt/teikun-86/tripay-laravel">
+    <img alt="GitHub code size in bytes" src="https://img.shields.io/github/languages/code-size/teikun-86/tripay-laravel">
+    <img alt="GitHub License" src="https://img.shields.io/github/license/teikun-86/tripay-laravel">
+    <img alt="PR Welcome" src="https://img.shields.io/badge/PRs-Welcome-blue">
+</p>
+
+<p align="center">~Under Development. More Docs soon~</p>
+
+### Table Of Contents
+- [Requirements](#requirements)
+- [Instalation](#instalation)
+- [Usage](#usage)
+  - [Basic Usage](#basic-usage)
+    - [1. Creating Tripay Client](#1-creating-tripay-client)
+  - [Payment Gateway](#payment-gateway)
+    - [1. Getting Payment Instruction](#1-getting-payment-instruction)
 
-<p align="center">~Under Development 😉~</p>
 
 ## Requirements
-- PHP v8.1+
-- PHP JSON Extension
-- PHP cURL Extension
-- Laravel v10+
+
+-   PHP v8.1+
+-   PHP JSON Extension
+-   PHP cURL Extension
+-   Laravel v10+
 
 ## Instalation
-Run composer require command
-```bash
-composer require teikun-86/tripay-laravel
-```
+
+1. Run composer require command
+
+    ```bash
+    composer require teikun-86/tripay-laravel
+    ```
+
+2. Publish Configuration file
+
+    ```bash
+    php artisan vendor:publish --provider=Teikun86\Tripay\Providers\TripayServiceProvider --tag=tripay-config
+    ```
+
+3. Add these config to your `.env` file
+    ```conf
+     TRIPAY_MERCHANT_CODE=""
+     TRIPAY_API_KEY=""
+     TRIPAY_PPOB_API_KEY=""
+     TRIPAY_PRIVATE_KEY=""
+     TRIPAY_PPOB_PIN=""
+    ```
+4. Happy Coding~
 
 ## Usage
-Soon~
+
+### Basic Usage
+
+#### 1. Creating Tripay Client
+    ```php
+    <?php
+    ...
+    $client = tripayClient();
+    ```
+
+### Payment Gateway
+
+#### 1. Getting Payment Instruction
+
+    <b>Parameters<b>
+
+    | Parameter      | Example    | Type    | Required | Description                                                                         |
+    | -------------- | ---------- | ------- | -------- | ----------------------------------------------------------------------------------- |
+    | `code`         | BRIVA      | string  | YES      | Payment Method Code ([See more](https://tripay.co.id/developer?tab=channels))       |
+    | `payment_code` | 1234567890 | string  | NO       | Payment Code, example for VA code                                                   |
+    | `amount`       | 10000      | int     | NO       | Amount to pay                                                                       |
+    | `allowHtml`    | false      | boolean | NO       | To allow HTML tag insertions on the instruction. Allow = 1, Disallow = 0, Default 0 |
+
+    ```php
+    <?php
+    ... // rest of your codes
+    $code = "BRIVA"; // Payment method code
+    $payment_code = "1234567890"; // optional
+    $amount = 10000; // optional
+    $allowHtml = false;
+    $instructions = $client->createPayment()->instruction($code, $payment_code, $amount, $allowHtml);
+    ```
+
+    The code above will return:
+
+    ```
+    Illuminate\Support\Collection {#6396
+    all: [
+      Teikun86\Tripay\Entities\PaymentInstruction {#6384},
+      Teikun86\Tripay\Entities\PaymentInstruction {#6411},
+      Teikun86\Tripay\Entities\PaymentInstruction {#6410},
+    ],
+    }
+    ```
+
+<p align="center">
+    Made with 💓 by <a href="https://github.com/teikun-86">teikun-86</a>
+</p>