add migrate doc

CHANGELOG.md

@@ -15,7 +15,7 @@
 
 ### Changed
 
-- Class structure - now the implementation is not merged into one class but divided into each product class
+- Class structure
 - Request to HTTP Client now use Guzzle Client instead of cURL
 
 ### Removed

MIGRATE.md

@@ -0,0 +1,147 @@
+# Migrations
+
+## v1.4.0 to v2.0.0
+
+### Instantiate API Key
+
+In the v1.4.0, secret API key is instantiated inside the config file. However in v2.0.0, secret API key is instantiated
+with:
+
+```php
+Xendit::loadApiKey('secretKey');
+```
+
+or secret API key can be stored inside `.env` file and be instantiated with following:
+
+```php
+Xendit::loadApiKey();
+```
+
+### Calling methods
+
+In v2.0.0, we restructured classes based on product, so it will impact on how the method is called.
+
+#### Create Invoice
+
+In v1.4.0, we used the following command to create an invoice:
+
+```php
+$external_id = 'demo_147580196270';
+$payer_email = '[email protected]';
+$description = 'Trip to Bali';
+$amount = 32000;
+
+$response = $xenditPHPClient->createInvoice($external_id, $amount, $payer_email, $description);
+```
+
+In v2.0.0, we will use this command to create an invoice:
+
+```php
+$params = ['external_id' => 'demo_147580196270',
+    'payer_email' => '[email protected]',
+    'description' => 'Trip to Bali',
+    'amount' => 32000
+];
+
+$response = \Xendit\Invoice::create($params);
+```
+
+#### Get Invoice
+
+In v1.4.0, to get an invoice:
+
+```php
+$response = $xenditPHPClient->getInvoice($invoice_id);
+```
+
+In v2.0.0, to get an invoice:
+
+```php
+$response = \Xendit\Invoice::retrieve($id);
+```
+
+#### Create Disbursement
+
+In v1.4.0, to create a disbursement:
+
+```php
+$external_id = 'disb-12345678';
+$amount = 15000;
+$bank_code = 'BCA';
+$account_holder_name = 'Joe';
+$account_number = '1234567890';
+
+$response = $xenditPHPClient->createDisbursement($external_id, $amount, $bank_code, $account_holder_name, $account_number);
+```
+
+In v2.0.0, to create a disbursement:
+
+```php
+$params = [
+    'external_id'=> 'disb-12345678',
+    'amount'=> 15000,
+    'bank_code'=> 'BCA',
+    'account_holder_name'=> 'Joe',
+    'account_number'=> '1234567890',
+    'description'=>'Disbursement from Example'
+];
+
+$response = \Xendit\Disbursements::create($params);
+```
+
+#### Get Balance
+
+In v1.4.0, to get current balance:
+
+```php
+$response = $xenditPHPClient->getBalance();
+```
+
+In v2.0.0, to get current balance:
+
+```php
+$response = \Xendit\Balance::getBalance('CASH');
+```
+
+#### Capture Credit Card Payment
+
+In v1.4.0, to capture a credit card payment:
+
+```php
+$external_id = 'ext-id';
+$token_id = 'token-id';
+$amount = 100000;
+
+$response = $xenditPHPClient->captureCreditCardPayment($external_id, $token_id, $amount);
+```
+
+In v2.0.0, to capture a credit card payment:
+
+```php
+$captureParams = ['amount' => 100000];
+
+$response = \Xendit\Cards::capture($id, $captureParams);
+```
+
+#### Refund Credit Card Payment
+
+In v1.4.0, to refund credit card payment:
+
+```php
+$id = 'id';
+$amount = 20000;
+$external_id = 'ext-id';
+
+$response = $xenditPHPClient->issueCreditCardRefund($id, $amount, $external_id);
+```
+
+In v2.0.0, to refund credit card payment:
+
+```php
+$refundParams = [
+    'external_id' => 'ext-id',
+    'amount' => 20000
+];
+
+$response = \Xendit\Cards::createRefund($id, $refundParams);
+```

src/Xendit.php

@@ -104,9 +104,7 @@ public static function loadApiKey($apiKey = null)
     public static function getLibVersion()
     {
         if (self::$libVersion === null) {
-            $content = file_get_contents('./composer.json');
-            $content = json_decode($content, true);
-            self::$libVersion = $content['version'];
+            self::$libVersion = self::VERSION;
         }
         return self::$libVersion;
     }