diff --git a/Model/Resolver/AbstractGetList.php b/Model/Resolver/AbstractGetList.php
index c6aa662..e1f597f 100755
--- a/Model/Resolver/AbstractGetList.php
+++ b/Model/Resolver/AbstractGetList.php
@@ -49,6 +49,7 @@ abstract class AbstractGetList implements ResolverInterface
 
     /**
      * AbstractGetList constructor.
+     *
      * @param SearchCriteriaBuilder $searchCriteriaBuilder
      */
     public function __construct(
@@ -100,7 +101,7 @@ abstract protected function getSearchResult($customer, $searchCriteria);
      * @return array
      * @throws GraphQlInputException
      */
-    private function getPageInfo($searchResult, $args)
+    protected function getPageInfo($searchResult, $args)
     {
         $totalPages  = ceil($searchResult->getTotalCount() / $args['pageSize']);
         $currentPage = $args['currentPage'];
diff --git a/Model/Resolver/Orders/MpReward.php b/Model/Resolver/Orders/MpReward.php
new file mode 100644
index 0000000..e5a64c2
--- /dev/null
+++ b/Model/Resolver/Orders/MpReward.php
@@ -0,0 +1,90 @@
+<?php
+/**
+ * Mageplaza
+ *
+ * NOTICE OF LICENSE
+ *
+ * This source file is subject to the Mageplaza.com license that is
+ * available through the world-wide-web at this URL:
+ * https://www.mageplaza.com/LICENSE.txt
+ *
+ * DISCLAIMER
+ *
+ * Do not edit or add to this file if you wish to upgrade this extension to newer
+ * version in the future.
+ *
+ * @category    Mageplaza
+ * @package     Mageplaza_RewardPointsGraphQl
+ * @copyright   Copyright (c) Mageplaza (https://www.mageplaza.com/)
+ * @license     https://www.mageplaza.com/LICENSE.txt
+ */
+
+declare(strict_types=1);
+
+namespace Mageplaza\RewardPointsGraphQl\Model\Resolver\Orders;
+
+use Exception;
+use Magento\Framework\Exception\LocalizedException;
+use Magento\Framework\GraphQl\Config\Element\Field;
+use Magento\Framework\GraphQl\Query\ResolverInterface;
+use Magento\Framework\GraphQl\Schema\Type\ResolveInfo;
+use Magento\Sales\Model\Order;
+use Magento\Sales\Model\OrderFactory;
+use Mageplaza\RewardPoints\Helper\Data;
+
+/**
+ * Class MpReward
+ * @package Mageplaza\RewardPointsGraphQl\Model\Resolver\Orders
+ */
+class MpReward implements ResolverInterface
+{
+    /**
+     * @var Data
+     */
+    protected $helperData;
+
+    /**
+     * @var OrderFactory
+     */
+    protected $orderFactory;
+
+    /**
+     * MpReward constructor.
+     *
+     * @param Data $helperData
+     * @param OrderFactory $orderFactory
+     */
+    public function __construct(
+        Data $helperData,
+        OrderFactory $orderFactory
+    ) {
+        $this->helperData   = $helperData;
+        $this->orderFactory = $orderFactory;
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function resolve(Field $field, $context, ResolveInfo $info, array $value = null, array $args = null)
+    {
+        if (!$this->helperData->isEnabled()) {
+            return null;
+        }
+
+        try {
+            if (isset($value['increment_id'])) {
+                $order = $this->orderFactory->create()->loadByIncrementId($value['increment_id']);
+
+                return [
+                    'earn'     => $order->getData('mp_reward_earn'),
+                    'spent'    => $order->getData('mp_reward_spent'),
+                    'discount' => abs($order->getData('mp_reward_discount'))
+                ];
+            }
+
+            return null;
+        } catch (Exception $e) {
+            return null;
+        }
+    }
+}
diff --git a/Model/Resolver/RewardCustomer/Account.php b/Model/Resolver/RewardCustomer/Account.php
index e1e0771..97fd7e8 100755
--- a/Model/Resolver/RewardCustomer/Account.php
+++ b/Model/Resolver/RewardCustomer/Account.php
@@ -29,6 +29,7 @@
 use Magento\Framework\GraphQl\Query\ResolverInterface;
 use Mageplaza\RewardPoints\Helper\Data;
 use Mageplaza\RewardPoints\Model\AccountFactory as RewardCustomerFactory;
+use Magento\Framework\Encryption\EncryptorInterface;
 
 /**
  * Class Account
@@ -46,17 +47,26 @@ class Account implements ResolverInterface
      */
     protected $helperData;
 
+    /**
+     * @var EncryptorInterface
+     */
+    protected $encryptor;
+
     /**
      * Account constructor.
+     *
      * @param RewardCustomerFactory $rewardCustomerFactory
      * @param Data $helperData
+     * @param EncryptorInterface $encryptor
      */
     public function __construct(
         RewardCustomerFactory $rewardCustomerFactory,
-        Data $helperData
+        Data $helperData,
+        EncryptorInterface $encryptor
     ) {
         $this->helperData            = $helperData;
         $this->rewardCustomerFactory = $rewardCustomerFactory;
+        $this->encryptor             = $encryptor;
     }
 
     /**
@@ -84,6 +94,7 @@ public function resolve(
         $data                 = $rewardCustomer->toArray();
         $data['point_spent']  = $rewardCustomer->getPointSpent();
         $data['point_earned'] = $rewardCustomer->getPointEarned();
+        $data['refer_code']   = $this->encrypt($customer->getId());
 
         $pointHelper = $this->helperData->getPointHelper();
         if ($this->helperData->getMaxPointPerCustomer()) {
@@ -105,4 +116,14 @@ public function resolve(
 
         return $data;
     }
+
+    /**
+     * @param string|int $data
+     *
+     * @return string
+     */
+    public function encrypt($data)
+    {
+        return base64_encode($this->encryptor->encrypt((string) $data));
+    }
 }
diff --git a/Model/Resolver/RewardCustomer/TransactionsByOrder.php b/Model/Resolver/RewardCustomer/TransactionsByOrder.php
new file mode 100644
index 0000000..2b7086d
--- /dev/null
+++ b/Model/Resolver/RewardCustomer/TransactionsByOrder.php
@@ -0,0 +1,132 @@
+<?php
+/**
+ * Mageplaza
+ *
+ * NOTICE OF LICENSE
+ *
+ * This source file is subject to the Mageplaza.com license that is
+ * available through the world-wide-web at this URL:
+ * https://www.mageplaza.com/LICENSE.txt
+ *
+ * DISCLAIMER
+ *
+ * Do not edit or add to this file if you wish to upgrade this extension to newer
+ * version in the future.
+ *
+ * @category    Mageplaza
+ * @package     Mageplaza_RewardPointsGraphQl
+ * @copyright   Copyright (c) Mageplaza (https://www.mageplaza.com/)
+ * @license     https://www.mageplaza.com/LICENSE.txt
+ */
+
+declare(strict_types=1);
+
+namespace Mageplaza\RewardPointsGraphQl\Model\Resolver\RewardCustomer;
+
+use Exception;
+use Magento\Framework\Api\Search\SearchCriteriaInterface;
+use Magento\Framework\Exception\LocalizedException;
+use Magento\Framework\GraphQl\Config\Element\Field;
+use Magento\Framework\GraphQl\Exception\GraphQlInputException;
+use Magento\Framework\GraphQl\Query\Resolver\Argument\SearchCriteria\Builder as SearchCriteriaBuilder;
+use Magento\Framework\GraphQl\Query\Resolver\ContextInterface;
+use Magento\Framework\GraphQl\Schema\Type\ResolveInfo;
+use Magento\Sales\Model\Order;
+use Mageplaza\RewardPointsGraphQl\Model\Resolver\AbstractGetList;
+use Mageplaza\RewardPoints\Model\TransactionRepository;
+
+/**
+ * Class TransactionsByOrder
+ * @package Mageplaza\RewardPointsGraphQl\Model\Resolver\RewardCustomer
+ */
+class TransactionsByOrder extends AbstractGetList
+{
+    /**
+     * @var string
+     */
+    protected $fieldName = 'mp_reward_transactions';
+
+    /**
+     * @var TransactionRepository
+     */
+    protected $transactionRepository;
+
+    /**
+     * @var Order
+     */
+    protected $order;
+
+    /**
+     * TransactionsByOrder constructor.
+     * @param SearchCriteriaBuilder $searchCriteriaBuilder
+     * @param TransactionRepository $transactionRepository
+     * @param Order $order
+     */
+    public function __construct(
+        SearchCriteriaBuilder $searchCriteriaBuilder,
+        TransactionRepository $transactionRepository,
+        Order $order
+    ) {
+        $this->transactionRepository = $transactionRepository;
+        $this->order                 = $order;
+
+        parent::__construct($searchCriteriaBuilder);
+    }
+
+    /**
+     * @param Field $field
+     * @param ContextInterface $context
+     * @param ResolveInfo $info
+     * @param array|null $value
+     * @param array|null $args
+     * @return array
+     */
+    public function resolve(Field $field, $context, ResolveInfo $info, array $value = null, array $args = null)
+    {
+        try {
+            /** @var Order $order */
+            $order = isset($value['model']) ? $value['model'] : null;
+            if (!$order) {
+                $order = $this->order->loadByIncrementId($value['increment_id']);
+            }
+
+            if (isset($args['currentPage']) && $args['currentPage'] < 1) {
+                throw new GraphQlInputException(__('currentPage value must be greater than 0.'));
+            }
+
+            if (isset($args['pageSize']) && $args['pageSize'] < 1) {
+                throw new GraphQlInputException(__('pageSize value must be greater than 0.'));
+            }
+
+            $searchCriteria = $this->searchCriteriaBuilder->build($this->fieldName, $args);
+            $searchCriteria->setCurrentPage($args['currentPage']);
+            $searchCriteria->setPageSize($args['pageSize']);
+            $searchResult = $this->getSearchResult($order->getId(), $searchCriteria);
+
+            return [
+                'total_count' => $searchResult->getTotalCount(),
+                'items'       => $searchResult->getItems(),
+                'page_info'   => $this->getPageInfo($searchResult, $args)
+            ];
+        } catch (Exception $e) {
+            return [];
+        }
+    }
+
+    /**
+     * @param int $orderId
+     * @param SearchCriteriaInterface $searchCriteria
+     *
+     * @return mixed
+     * @throws LocalizedException
+     */
+    public function getSearchResult($orderId, $searchCriteria)
+    {
+        $result = $this->transactionRepository->getListByOrderId($searchCriteria, $orderId);
+        foreach ($result->getItems() as $item) {
+            $item->setComment($item->getTitle());
+        }
+
+        return $result;
+    }
+}
diff --git a/Plugin/Model/Resolver/CreateCustomer.php b/Plugin/Model/Resolver/CreateCustomer.php
new file mode 100644
index 0000000..a12e4e1
--- /dev/null
+++ b/Plugin/Model/Resolver/CreateCustomer.php
@@ -0,0 +1,104 @@
+<?php
+/**
+ * Mageplaza
+ *
+ * NOTICE OF LICENSE
+ *
+ * This source file is subject to the Mageplaza.com license that is
+ * available through the world-wide-web at this URL:
+ * https://www.mageplaza.com/LICENSE.txt
+ *
+ * DISCLAIMER
+ *
+ * Do not edit or add to this file if you wish to upgrade this extension to newer
+ * version in the future.
+ *
+ * @category    Mageplaza
+ * @package     Mageplaza_RewardPointsGraphQl
+ * @copyright   Copyright (c) Mageplaza (https://www.mageplaza.com/)
+ * @license     https://www.mageplaza.com/LICENSE.txt
+ */
+
+namespace Mageplaza\RewardPointsGraphQl\Plugin\Model\Resolver;
+
+use Exception;
+use Magento\Customer\Api\CustomerRepositoryInterface;
+use Magento\CustomerGraphQl\Model\Resolver\CreateCustomer as CreateCustomerAbstract;
+use Magento\Framework\Exception\InputException;
+use Magento\Framework\GraphQl\Config\Element\Field;
+use Magento\Framework\GraphQl\Query\Resolver\ContextInterface;
+use Magento\Framework\GraphQl\Schema\Type\ResolveInfo;
+use Magento\Framework\Stdlib\Cookie\CookieSizeLimitReachedException;
+use Magento\Framework\Stdlib\Cookie\FailureToSendException;
+use Mageplaza\RewardPointsUltimate\Helper\Data as ultimateData;
+
+/**
+ * Class CreateCustomer
+ * @package Mageplaza\RewardPointsGraphQl\Model\Resolver
+ */
+class CreateCustomer
+{
+    /**
+     * @var ultimateData
+     */
+    protected $ultimateData;
+
+    /**
+     * @var CustomerRepositoryInterface
+     */
+    protected $customerRepository;
+
+    /**
+     * CreateCustomer constructor.
+     *
+     * @param ultimateData $ultimateData
+     * @param CustomerRepositoryInterface $customerRepository
+     */
+    public function __construct(
+        ultimateData $ultimateData,
+        CustomerRepositoryInterface $customerRepository
+    ) {
+        $this->ultimateData       = $ultimateData;
+        $this->customerRepository = $customerRepository;
+    }
+
+    /**
+     * @param CreateCustomerAbstract $subject
+     * @param Field $field
+     * @param ContextInterface $context
+     * @param ResolveInfo $info
+     * @param array|null $value
+     * @param array|null $args
+     *
+     * @return array
+     * @throws InputException
+     * @throws CookieSizeLimitReachedException
+     * @throws FailureToSendException
+     */
+    public function beforeResolve(
+        CreateCustomerAbstract $subject,
+        Field $field,
+        $context,
+        ResolveInfo $info,
+        array $value = null,
+        array $args = null
+    ) {
+
+        if (isset($args['input']['mp_refer'])) {
+            try {
+                $referCodeOrEmail = trim($args['input']['mp_refer']);
+                $referCode        = $this->ultimateData->getCryptHelper()->checkReferCodeOrEmail($referCodeOrEmail);
+            } catch (Exception $e) {
+                $referCode = false;
+            }
+
+            if ($referCode) {
+                $this->ultimateData->getCookieHelper()->set($referCode);
+            } else {
+                $this->ultimateData->getCookieHelper()->deleteMpRefererKeyFromCookie();
+            }
+        }
+
+        return [$field, $context, $info, $value, $args];
+    }
+}
diff --git a/Plugin/Model/Resolver/OrderTotal.php b/Plugin/Model/Resolver/OrderTotal.php
new file mode 100644
index 0000000..94070ba
--- /dev/null
+++ b/Plugin/Model/Resolver/OrderTotal.php
@@ -0,0 +1,79 @@
+<?php
+/**
+ * Mageplaza
+ *
+ * NOTICE OF LICENSE
+ *
+ * This source file is subject to the Mageplaza.com license that is
+ * available through the world-wide-web at this URL:
+ * https://www.mageplaza.com/LICENSE.txt
+ *
+ * DISCLAIMER
+ *
+ * Do not edit or add to this file if you wish to upgrade this extension to newer
+ * version in the future.
+ *
+ * @category    Mageplaza
+ * @package     Mageplaza_RewardPointsGraphQl
+ * @copyright   Copyright (c) Mageplaza (https://www.mageplaza.com/)
+ * @license     https://www.mageplaza.com/LICENSE.txt
+ */
+
+namespace Mageplaza\RewardPointsGraphQl\Plugin\Model\Resolver;
+
+use Magento\Framework\Exception\LocalizedException;
+use Magento\Sales\Api\Data\OrderInterface;
+use Magento\Sales\Model\Order;
+use Magento\SalesGraphQl\Model\Resolver\OrderTotal as SalesGraphQlOrderTotal;
+use Mageplaza\RewardPoints\Helper\Data;
+
+/**
+ * Class OrderTotal
+ * @package Mageplaza\RewardPointsGraphQl\Plugin\Model\Resolver
+ */
+class OrderTotal
+{
+    /**
+     * @var Data
+     */
+    protected $helperData;
+
+    /**
+     * OrderTotal constructor.
+     *
+     * @param Data $helperData
+     */
+    public function __construct(
+        Data $helperData
+    ) {
+        $this->helperData = $helperData;
+    }
+
+    /**
+     * @param SalesGraphQlOrderTotal $subject
+     * @param array $result
+     *
+     * @return mixed
+     * @throws LocalizedException
+     */
+    public function afterResolve(SalesGraphQlOrderTotal $subject, $result)
+    {
+        if (!$this->helperData->isEnabled()) {
+            return $result;
+        }
+
+        if (!(($result['model'] ?? null) instanceof OrderInterface)) {
+            throw new LocalizedException(__('"model" value should be specified'));
+        }
+
+        /** @var Order $order */
+        $order                      = $result['model'];
+        $result['mp_reward_points'] = [
+            'earn'     => $order->getData('mp_reward_earn'),
+            'spent'    => $order->getData('mp_reward_spent'),
+            'discount' => abs($order->getData('mp_reward_discount'))
+        ];
+
+        return $result;
+    }
+}
diff --git a/composer.json b/composer.json
index 89d31d5..3418261 100755
--- a/composer.json
+++ b/composer.json
@@ -1,23 +1,23 @@
-{
-  "name": "mageplaza/module-reward-points-graphql",
-  "description": "Magento 2 Reward Points Graphql Extension",
-  "type": "magento2-module",
-  "version": "1.1.0",
-  "license": "proprietary",
-  "authors": [
-    {
-      "name": "Mageplaza",
-      "email": "support@mageplaza.com",
-      "homepage": "https://www.mageplaza.com",
-      "role": "Technical Support"
-    }
-  ],
-  "autoload": {
-    "files": [
-      "registration.php"
-    ],
-    "psr-4": {
-      "Mageplaza\\RewardPointsGraphQl\\": ""
-    }
-  }
-}
\ No newline at end of file
+{
+  "name": "mageplaza/module-reward-points-graphql",
+  "description": "Magento 2 Reward Points Graphql Extension",
+  "type": "magento2-module",
+  "version": "1.2.0",
+  "license": "proprietary",
+  "authors": [
+    {
+      "name": "Mageplaza",
+      "email": "support@mageplaza.com",
+      "homepage": "https://www.mageplaza.com",
+      "role": "Technical Support"
+    }
+  ],
+  "autoload": {
+    "files": [
+      "registration.php"
+    ],
+    "psr-4": {
+      "Mageplaza\\RewardPointsGraphQl\\": ""
+    }
+  }
+}
diff --git a/etc/di.xml b/etc/di.xml
index 9aa03d7..d83aadc 100755
--- a/etc/di.xml
+++ b/etc/di.xml
@@ -33,4 +33,10 @@
             </argument>
         </arguments>
     </type>
+    <type name="Magento\CustomerGraphQl\Model\Resolver\CreateCustomer">
+        <plugin name="mp_reward_refer_code" type="Mageplaza\RewardPointsGraphQl\Plugin\Model\Resolver\CreateCustomer"/>
+    </type>
+    <type name="Magento\SalesGraphQl\Model\Resolver\OrderTotal">
+        <plugin name="mp_reward_order_total" type="Mageplaza\RewardPointsGraphQl\Plugin\Model\Resolver\OrderTotal"/>
+    </type>
 </config>
diff --git a/etc/schema.graphqls b/etc/schema.graphqls
index 82ac4f6..0ef1868 100755
--- a/etc/schema.graphqls
+++ b/etc/schema.graphqls
@@ -8,7 +8,7 @@ type Query {
 }
 
 ## ======================================== Customer ===================================================================
-type Customer {
+    type Customer {
     mp_reward:MpRewardCustomersOutput @doc(description: "Reward customer") @resolver(class: "Mageplaza\\RewardPointsGraphQl\\Model\\Resolver\\RewardCustomer\\Account")
 }
 
@@ -107,6 +107,7 @@ type MpRewardCustomersOutput {
     notification_expire : String @doc(description: "Notification of expire")
     balance_limitation : String @doc(description: "Balance limitation")
     earn_point_expire: String @doc(description: "Earn point expire")
+    refer_code: String @doc(description: "Refer code")
     current_exchange_rates: RewardExchangeRate @doc(description: "Current exchange rates") @resolver(class: "Mageplaza\\RewardPointsGraphQl\\Model\\Resolver\\RewardCustomer\\Rate")
     transactions(
             filter: MpRewardTransactionsFilterInput @doc(description: "Identifies which reward customer transaction attributes to search for and return.")
@@ -273,4 +274,28 @@ type MpRewardInvitations {
   invited_discount: Float @doc(description: "Invited discount")
   store_id: String @doc(description: "Store id")
   created_at: String @doc(description: "Created at")
-}
\ No newline at end of file
+}
+
+## ========================================= Refer Code ==============================================================
+input CustomerInput {
+    mp_refer: String @doc(description: "Refer Code")
+}
+
+type CustomerOrder {
+    mp_reward_points: MpRewardPointsOutput @doc(description: "GetMageplaza Reward Points Information(compatible with 2.3.x).") @resolver(class: "Mageplaza\\RewardPointsGraphQl\\Model\\Resolver\\Orders\\MpReward")
+    transactions(
+        filter: MpRewardTransactionsFilterInput @doc(description: "Identifies which reward customer transaction attributes to search for and return.")
+        pageSize: Int = 5 @doc(description: "How many items should be shown on the page?")
+        currentPage: Int = 1 @doc(description: "Allow page number to start from page 1.")
+    ):MpRewardTransactionsListOutput @resolver(class: "Mageplaza\\RewardPointsGraphQl\\Model\\Resolver\\RewardCustomer\\TransactionsByOrder") @doc(description: "The query searches for reward customer.")
+}
+
+type OrderTotal {
+    mp_reward_points: MpRewardPointsOutput @doc(description: "Mageplaza Reward Points Information.")
+}
+
+type MpRewardPointsOutput {
+    earn: Int @doc(description: "Points earned.")
+    spent: Int @doc(description: "Points spent.")
+    discount: Float @doc(description: "Discount for reward.")
+}