adds readme

README.md

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+# PayUMoney Php
+
+
+Library for integrating payumoney easily to your laravel/php apps.
+
+## Installation
+
+Use the package manager [composer](https://getcomposer.org/) to install package.
+
+```bash
+composer install ajuchacko/payumoney
+```
+
+## Usage
+
+```php
+<?php
+
+use Ajuchacko\Payu\PayuGateway;
+
+
+$params = [
+    'txnid'       => '134',
+    'amount'      => 12.00,
+    'productinfo' => 'Iphone',
+    'firstname'   => 'Jon Doe',
+    'email'       => '[email protected]',
+    'phone'       => '9895309090',
+    'surl'        => 'https://example.com/success',
+    'furl'        => 'https://example.com/failure',
+    'udf1'        => 'Secret value',
+];
+
+$payu = new PayuGateway([
+    "secret_key"  => "testSecret",
+    "merchant_key"=> "testMerchantKey",
+    "merchant_id" => "7974556",
+    "test_mode"   => false,
+]);
+
+$payu->pay($params); // Redirects to PayUMoney
+
+// OR
+
+$hash = $payu->newChecksum($params);
+$payu->toArray(); // Returns array or parameters which can be submitted via web/mobile app.
+
+```
+
+## Payment Response
+
+```php
+use Ajuchacko\Payu\PayuGateway;
+
+$payu = new PayuGateway([
+    "secret_key"  => "testSecret",
+    "merchant_key"  => "testMerchantKey",
+    "merchant_id" => "7974556",
+    "test_mode"   => true,
+]);
+
+
+try {
+    $response = $payu->getPaymentResponse($request->all());
+    if ($response->getStatus() === PaymentStatusType::STATUS_COMPLETED) {
+        # code...
+    }
+
+    // OR
+
+    if ($response = $payu->paymentSuccess($request->all())) {
+        # code...
+    }
+} catch (InvalidChecksumException $e) {
+  // Checksum is tampered
+}
+```
+## Contributing
+Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.
+
+Please make sure to update tests as appropriate.

composer.json

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 {
+  "name": "ajuchacko/payumoney",
+  "description": "PayUMoney library for PHP",
+  "keywords": ["payu", "payuindia", "payumoney"],
+  "homepage": "http://github.com/ajuchacko91/payumoney-php",
+  "type": "library",
+  "version": "1.1",
+  "authors": [
+    {
+      "name": "Aju Chacko",
+      "email": "[email protected]",
+      "homepage": "http://github.com/ajuchacko91"
+    }
+  ],
     "require": {
         "phpunit/phpunit": "^8.5",
         "symfony/options-resolver": "^5.0",