diff --git a/README.md b/README.md
index bd048a3c..c719f128 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@
 The official Xendit Go SDK provides a simple and convenient way to call Xendit's REST API
 in applications written in Go.
 
-* Package version: 4.0.0
+* Package version: 4.1.0
 
 # Getting Started
 
diff --git a/client.go b/client.go
index 73224f36..f8044064 100644
--- a/client.go
+++ b/client.go
@@ -154,7 +154,7 @@ func (c *APIClient) PrepareRequest(
 	headerParams["xendit-lib"] = "go"
 
 	// TODO: overwrite this line from buddy pipeline
-	headerParams["xendit-lib-ver"] = "4.0.0"
+	headerParams["xendit-lib-ver"] = "4.1.0"
 
 	var body *bytes.Buffer
 
diff --git a/configuration.go b/configuration.go
index fcd026b0..d0238dc8 100644
--- a/configuration.go
+++ b/configuration.go
@@ -78,7 +78,7 @@ var Default Configuration = *NewConfiguration()
 func NewConfiguration() *Configuration {
 	cfg := &Configuration{
 		DefaultHeader:    make(map[string]string),
-		UserAgent:        "OpenAPI-Generator/4.0.0/go",
+		UserAgent:        "OpenAPI-Generator/4.1.0/go",
 		Debug:            false,
 		Servers:          ServerConfigurations{
 			{
diff --git a/docs/InvoiceApi.md b/docs/InvoiceApi.md
index 2df7f445..4982bf6e 100644
--- a/docs/InvoiceApi.md
+++ b/docs/InvoiceApi.md
@@ -352,7 +352,7 @@ Use the following callback objects provided by Xendit to receive callbacks (also
 ### InvoiceCallback Object
 >Invoice Callback Object
 
-Model Documentation: [InvoiceCallback](/InvoiceCallback.md)
+Model Documentation: [InvoiceCallback](invoice/InvoiceCallback.md)
 #### Usage Example
 Note that the example is meant to illustrate the contents of the callback object -- you will not need to instantiate these objects in practice
 ```go
diff --git a/docs/PaymentMethodApi.md b/docs/PaymentMethodApi.md
index 5077a779..74391400 100644
--- a/docs/PaymentMethodApi.md
+++ b/docs/PaymentMethodApi.md
@@ -668,7 +668,7 @@ Use the following callback objects provided by Xendit to receive callbacks (also
 ### PaymentMethodCallback Object
 >Callback for active or expired E-Wallet or Direct Debit account linking, Virtual Accounts or QR strings
 
-Model Documentation: [PaymentMethodCallback](/PaymentMethodCallback.md)
+Model Documentation: [PaymentMethodCallback](payment_method/PaymentMethodCallback.md)
 #### Usage Example
 Note that the example is meant to illustrate the contents of the callback object -- you will not need to instantiate these objects in practice
 ```go
diff --git a/docs/PaymentRequestApi.md b/docs/PaymentRequestApi.md
index c06d43ea..2b92fa38 100644
--- a/docs/PaymentRequestApi.md
+++ b/docs/PaymentRequestApi.md
@@ -544,7 +544,7 @@ Use the following callback objects provided by Xendit to receive callbacks (also
 ### PaymentCallback Object
 >Callback for successful or failed payments made via the Payments API
 
-Model Documentation: [PaymentCallback](/PaymentCallback.md)
+Model Documentation: [PaymentCallback](payment_request/PaymentCallback.md)
 #### Usage Example
 Note that the example is meant to illustrate the contents of the callback object -- you will not need to instantiate these objects in practice
 ```go
diff --git a/docs/RefundApi.md b/docs/RefundApi.md
index 378465fa..d73a26f3 100644
--- a/docs/RefundApi.md
+++ b/docs/RefundApi.md
@@ -329,7 +329,7 @@ Use the following callback objects provided by Xendit to receive callbacks (also
 ### RefundCallback Object
 >Callback for successful or failed Refunds made via the Payments API
 
-Model Documentation: [RefundCallback](/RefundCallback.md)
+Model Documentation: [RefundCallback](refund/RefundCallback.md)
 #### Usage Example
 Note that the example is meant to illustrate the contents of the callback object -- you will not need to instantiate these objects in practice
 ```go
diff --git a/docs/invoice/EwalletType.md b/docs/invoice/EwalletType.md
index bf507f98..cea88690 100644
--- a/docs/invoice/EwalletType.md
+++ b/docs/invoice/EwalletType.md
@@ -23,6 +23,16 @@ Representing the available eWallet channels used for invoice-related transaction
     
     * `JENIUSPAY` (value: `"JENIUSPAY"`)
     
+    * `MOMO` (value: `"MOMO"`)
+    
+    * `ZALOPAY` (value: `"ZALOPAY"`)
+    
+    * `VIETTELPAY` (value: `"VIETTELPAY"`)
+    
+    * `VNPTWALLET` (value: `"VNPTWALLET"`)
+    
+    * `APPOTA` (value: `"APPOTA"`)
+    
     * `XENDIT_ENUM_DEFAULT_FALLBACK` (value: `UNKNOWN_ENUM_VALUE`)
 
 If you encounter `UNKNOWN_ENUM_VALUE`, it means that this ENUM is unavailable in your current SDK version. Please upgrade to get the newest ENUM.
diff --git a/docs/payment_request/PaymentCallbackData.md b/docs/payment_request/PaymentCallbackData.md
index 3527ecdf..63350c55 100644
--- a/docs/payment_request/PaymentCallbackData.md
+++ b/docs/payment_request/PaymentCallbackData.md
@@ -15,7 +15,7 @@ Represents the actual funds transaction/attempt made to a payment method
 | **PaymentMethod** | [**PaymentMethod**](PaymentMethod.md) | ☑️ |  |  |
 | **ChannelProperties** | Pointer to [**NullablePaymentRequestChannelProperties**](PaymentRequestChannelProperties.md) |  |  |  |
 | **PaymentDetail** | Pointer to **map[string]interface{}** |  |  |  |
-| **FailureCode** | Pointer to **map[string]interface{}** |  |  |  |
+| **FailureCode** | Pointer to **NullableString** |  |  |  |
 | **Created** | **string** | ☑️ |  |  |
 | **Updated** | **string** | ☑️ |  |  |
 | **Metadata** | Pointer to **map[string]interface{}** |  |  |  |
@@ -321,20 +321,20 @@ HasPaymentDetail returns a boolean if a field has been set.
 UnsetPaymentDetail ensures that no value is present for PaymentDetail, not even an explicit nil
 ### GetFailureCode
 
-`func (o *PaymentCallbackData) GetFailureCode() map[string]interface{}`
+`func (o *PaymentCallbackData) GetFailureCode() string`
 
 GetFailureCode returns the FailureCode field if non-nil, zero value otherwise.
 
 ### GetFailureCodeOk
 
-`func (o *PaymentCallbackData) GetFailureCodeOk() (*map[string]interface{}, bool)`
+`func (o *PaymentCallbackData) GetFailureCodeOk() (*string, bool)`
 
 GetFailureCodeOk returns a tuple with the FailureCode field if it's non-nil, zero value otherwise
 and a boolean to check if the value has been set.
 
 ### SetFailureCode
 
-`func (o *PaymentCallbackData) SetFailureCode(v map[string]interface{})`
+`func (o *PaymentCallbackData) SetFailureCode(v string)`
 
 SetFailureCode sets FailureCode field to given value.
 
diff --git a/docs/payment_request/QRCodeChannelCode.md b/docs/payment_request/QRCodeChannelCode.md
index 2e89e061..c9d6375d 100644
--- a/docs/payment_request/QRCodeChannelCode.md
+++ b/docs/payment_request/QRCodeChannelCode.md
@@ -3,6 +3,8 @@ QR Code Channel Code
 
     ## Enum
     
+    * `QRIS` (value: `"QRIS"`)
+    
     * `DANA` (value: `"DANA"`)
     
     * `RCBC` (value: `"RCBC"`)
diff --git a/docs/payment_request/VirtualAccountChannelCode.md b/docs/payment_request/VirtualAccountChannelCode.md
index c5b806bf..6fa5a56e 100644
--- a/docs/payment_request/VirtualAccountChannelCode.md
+++ b/docs/payment_request/VirtualAccountChannelCode.md
@@ -35,6 +35,12 @@ Virtual Account Channel Code
     
     * `AMBANK` (value: `"AMBANK"`)
     
+    * `BNC` (value: `"BNC"`)
+    
+    * `HANA` (value: `"HANA"`)
+    
+    * `MUAMALAT` (value: `"MUAMALAT"`)
+    
     * `XENDIT_ENUM_DEFAULT_FALLBACK` (value: `UNKNOWN_ENUM_VALUE`)
 
 If you encounter `UNKNOWN_ENUM_VALUE`, it means that this ENUM is unavailable in your current SDK version. Please upgrade to get the newest ENUM.
diff --git a/invoice/model_address_object.go b/invoice/model_address_object.go
index d8411f4b..c042b0df 100644
--- a/invoice/model_address_object.go
+++ b/invoice/model_address_object.go
@@ -3,7 +3,7 @@ xendit-invoice-service
 
 xendit-invoice-service descriptions
 
-API version: 1.5.0
+API version: 1.6.0
 */
 
 
diff --git a/invoice/model_alternative_display_item.go b/invoice/model_alternative_display_item.go
index 15852fe1..6613a674 100644
--- a/invoice/model_alternative_display_item.go
+++ b/invoice/model_alternative_display_item.go
@@ -3,7 +3,7 @@ xendit-invoice-service
 
 xendit-invoice-service descriptions
 
-API version: 1.5.0
+API version: 1.6.0
 */
 
 
diff --git a/invoice/model_bad_request_error.go b/invoice/model_bad_request_error.go
index bc3209a8..20c5c5bb 100644
--- a/invoice/model_bad_request_error.go
+++ b/invoice/model_bad_request_error.go
@@ -3,7 +3,7 @@ xendit-invoice-service
 
 xendit-invoice-service descriptions
 
-API version: 1.5.0
+API version: 1.6.0
 */
 
 
diff --git a/invoice/model_bank.go b/invoice/model_bank.go
index 512759e1..cd8f4b31 100644
--- a/invoice/model_bank.go
+++ b/invoice/model_bank.go
@@ -3,7 +3,7 @@ xendit-invoice-service
 
 xendit-invoice-service descriptions
 
-API version: 1.5.0
+API version: 1.6.0
 */
 
 
diff --git a/invoice/model_bank_code.go b/invoice/model_bank_code.go
index decab1f2..2e33090b 100644
--- a/invoice/model_bank_code.go
+++ b/invoice/model_bank_code.go
@@ -3,7 +3,7 @@ xendit-invoice-service
 
 xendit-invoice-service descriptions
 
-API version: 1.5.0
+API version: 1.6.0
 */
 
 
diff --git a/invoice/model_create_invoice_request.go b/invoice/model_create_invoice_request.go
index db00edeb..11b4689e 100644
--- a/invoice/model_create_invoice_request.go
+++ b/invoice/model_create_invoice_request.go
@@ -3,7 +3,7 @@ xendit-invoice-service
 
 xendit-invoice-service descriptions
 
-API version: 1.5.0
+API version: 1.6.0
 */
 
 
diff --git a/invoice/model_customer_object.go b/invoice/model_customer_object.go
index 3c557c23..35480e73 100644
--- a/invoice/model_customer_object.go
+++ b/invoice/model_customer_object.go
@@ -3,7 +3,7 @@ xendit-invoice-service
 
 xendit-invoice-service descriptions
 
-API version: 1.5.0
+API version: 1.6.0
 */
 
 
diff --git a/invoice/model_direct_debit.go b/invoice/model_direct_debit.go
index e779e93a..d60bca34 100644
--- a/invoice/model_direct_debit.go
+++ b/invoice/model_direct_debit.go
@@ -3,7 +3,7 @@ xendit-invoice-service
 
 xendit-invoice-service descriptions
 
-API version: 1.5.0
+API version: 1.6.0
 */
 
 
diff --git a/invoice/model_direct_debit_type.go b/invoice/model_direct_debit_type.go
index fb73d8d9..4e2c662a 100644
--- a/invoice/model_direct_debit_type.go
+++ b/invoice/model_direct_debit_type.go
@@ -3,7 +3,7 @@ xendit-invoice-service
 
 xendit-invoice-service descriptions
 
-API version: 1.5.0
+API version: 1.6.0
 */
 
 
diff --git a/invoice/model_ewallet.go b/invoice/model_ewallet.go
index c4919313..37d1938a 100644
--- a/invoice/model_ewallet.go
+++ b/invoice/model_ewallet.go
@@ -3,7 +3,7 @@ xendit-invoice-service
 
 xendit-invoice-service descriptions
 
-API version: 1.5.0
+API version: 1.6.0
 */
 
 
diff --git a/invoice/model_ewallet_type.go b/invoice/model_ewallet_type.go
index 1068e6f9..b072a43a 100644
--- a/invoice/model_ewallet_type.go
+++ b/invoice/model_ewallet_type.go
@@ -3,7 +3,7 @@ xendit-invoice-service
 
 xendit-invoice-service descriptions
 
-API version: 1.5.0
+API version: 1.6.0
 */
 
 
@@ -30,6 +30,11 @@ const (
 	EWALLETTYPE_ASTRAPAY EwalletType = "ASTRAPAY"
 	EWALLETTYPE_NEXCASH EwalletType = "NEXCASH"
 	EWALLETTYPE_JENIUSPAY EwalletType = "JENIUSPAY"
+	EWALLETTYPE_MOMO EwalletType = "MOMO"
+	EWALLETTYPE_ZALOPAY EwalletType = "ZALOPAY"
+	EWALLETTYPE_VIETTELPAY EwalletType = "VIETTELPAY"
+	EWALLETTYPE_VNPTWALLET EwalletType = "VNPTWALLET"
+	EWALLETTYPE_APPOTA EwalletType = "APPOTA"
     EWALLETTYPE_XENDIT_ENUM_DEFAULT_FALLBACK EwalletType = "UNKNOWN_ENUM_VALUE"
 )
 
@@ -45,6 +50,11 @@ var AllowedEwalletTypeEnumValues = []EwalletType{
 	"ASTRAPAY",
 	"NEXCASH",
 	"JENIUSPAY",
+	"MOMO",
+	"ZALOPAY",
+	"VIETTELPAY",
+	"VNPTWALLET",
+	"APPOTA",
     "UNKNOWN_ENUM_VALUE",
 }
 
diff --git a/invoice/model_forbidden_error.go b/invoice/model_forbidden_error.go
index 5e143bc1..d3379ef4 100644
--- a/invoice/model_forbidden_error.go
+++ b/invoice/model_forbidden_error.go
@@ -3,7 +3,7 @@ xendit-invoice-service
 
 xendit-invoice-service descriptions
 
-API version: 1.5.0
+API version: 1.6.0
 */
 
 
diff --git a/invoice/model_invoice.go b/invoice/model_invoice.go
index e8e166e9..94df83ae 100644
--- a/invoice/model_invoice.go
+++ b/invoice/model_invoice.go
@@ -3,7 +3,7 @@ xendit-invoice-service
 
 xendit-invoice-service descriptions
 
-API version: 1.5.0
+API version: 1.6.0
 */
 
 
diff --git a/invoice/model_invoice_callback.go b/invoice/model_invoice_callback.go
index 50cbd42b..94646f9d 100644
--- a/invoice/model_invoice_callback.go
+++ b/invoice/model_invoice_callback.go
@@ -3,7 +3,7 @@ xendit-invoice-service
 
 xendit-invoice-service descriptions
 
-API version: 1.5.0
+API version: 1.6.0
 */
 
 
diff --git a/invoice/model_invoice_callback_item.go b/invoice/model_invoice_callback_item.go
index cb570bf0..abbb8912 100644
--- a/invoice/model_invoice_callback_item.go
+++ b/invoice/model_invoice_callback_item.go
@@ -3,7 +3,7 @@ xendit-invoice-service
 
 xendit-invoice-service descriptions
 
-API version: 1.5.0
+API version: 1.6.0
 */
 
 
diff --git a/invoice/model_invoice_client_type.go b/invoice/model_invoice_client_type.go
index ae4745ee..a24d165b 100644
--- a/invoice/model_invoice_client_type.go
+++ b/invoice/model_invoice_client_type.go
@@ -3,7 +3,7 @@ xendit-invoice-service
 
 xendit-invoice-service descriptions
 
-API version: 1.5.0
+API version: 1.6.0
 */
 
 
diff --git a/invoice/model_invoice_currency.go b/invoice/model_invoice_currency.go
index 9a9b4439..af7732ac 100644
--- a/invoice/model_invoice_currency.go
+++ b/invoice/model_invoice_currency.go
@@ -3,7 +3,7 @@ xendit-invoice-service
 
 xendit-invoice-service descriptions
 
-API version: 1.5.0
+API version: 1.6.0
 */
 
 
diff --git a/invoice/model_invoice_error404_response_definition.go b/invoice/model_invoice_error404_response_definition.go
index f7a785fc..ff8f878c 100644
--- a/invoice/model_invoice_error404_response_definition.go
+++ b/invoice/model_invoice_error404_response_definition.go
@@ -3,7 +3,7 @@ xendit-invoice-service
 
 xendit-invoice-service descriptions
 
-API version: 1.5.0
+API version: 1.6.0
 */
 
 
diff --git a/invoice/model_invoice_fee.go b/invoice/model_invoice_fee.go
index 7805a3ac..f0604e1a 100644
--- a/invoice/model_invoice_fee.go
+++ b/invoice/model_invoice_fee.go
@@ -3,7 +3,7 @@ xendit-invoice-service
 
 xendit-invoice-service descriptions
 
-API version: 1.5.0
+API version: 1.6.0
 */
 
 
diff --git a/invoice/model_invoice_item.go b/invoice/model_invoice_item.go
index ef5fd25a..eee77d86 100644
--- a/invoice/model_invoice_item.go
+++ b/invoice/model_invoice_item.go
@@ -3,7 +3,7 @@ xendit-invoice-service
 
 xendit-invoice-service descriptions
 
-API version: 1.5.0
+API version: 1.6.0
 */
 
 
diff --git a/invoice/model_invoice_not_found_error.go b/invoice/model_invoice_not_found_error.go
index 3d386a93..8d2db12a 100644
--- a/invoice/model_invoice_not_found_error.go
+++ b/invoice/model_invoice_not_found_error.go
@@ -3,7 +3,7 @@ xendit-invoice-service
 
 xendit-invoice-service descriptions
 
-API version: 1.5.0
+API version: 1.6.0
 */
 
 
diff --git a/invoice/model_invoice_payment_method.go b/invoice/model_invoice_payment_method.go
index 2c6fcc22..1c633f5e 100644
--- a/invoice/model_invoice_payment_method.go
+++ b/invoice/model_invoice_payment_method.go
@@ -3,7 +3,7 @@ xendit-invoice-service
 
 xendit-invoice-service descriptions
 
-API version: 1.5.0
+API version: 1.6.0
 */
 
 
diff --git a/invoice/model_invoice_status.go b/invoice/model_invoice_status.go
index 93e9da9e..76725c32 100644
--- a/invoice/model_invoice_status.go
+++ b/invoice/model_invoice_status.go
@@ -3,7 +3,7 @@ xendit-invoice-service
 
 xendit-invoice-service descriptions
 
-API version: 1.5.0
+API version: 1.6.0
 */
 
 
diff --git a/invoice/model_notification_channel.go b/invoice/model_notification_channel.go
index ba5c6488..b536a9d2 100644
--- a/invoice/model_notification_channel.go
+++ b/invoice/model_notification_channel.go
@@ -3,7 +3,7 @@ xendit-invoice-service
 
 xendit-invoice-service descriptions
 
-API version: 1.5.0
+API version: 1.6.0
 */
 
 
diff --git a/invoice/model_notification_preference.go b/invoice/model_notification_preference.go
index ab331ae5..67a9aeba 100644
--- a/invoice/model_notification_preference.go
+++ b/invoice/model_notification_preference.go
@@ -3,7 +3,7 @@ xendit-invoice-service
 
 xendit-invoice-service descriptions
 
-API version: 1.5.0
+API version: 1.6.0
 */
 
 
diff --git a/invoice/model_paylater.go b/invoice/model_paylater.go
index 31eb390b..c1ce0252 100644
--- a/invoice/model_paylater.go
+++ b/invoice/model_paylater.go
@@ -3,7 +3,7 @@ xendit-invoice-service
 
 xendit-invoice-service descriptions
 
-API version: 1.5.0
+API version: 1.6.0
 */
 
 
diff --git a/invoice/model_paylater_type.go b/invoice/model_paylater_type.go
index a66482ce..2cc23032 100644
--- a/invoice/model_paylater_type.go
+++ b/invoice/model_paylater_type.go
@@ -3,7 +3,7 @@ xendit-invoice-service
 
 xendit-invoice-service descriptions
 
-API version: 1.5.0
+API version: 1.6.0
 */
 
 
diff --git a/invoice/model_payment_details.go b/invoice/model_payment_details.go
index ef0472d3..d78027fc 100644
--- a/invoice/model_payment_details.go
+++ b/invoice/model_payment_details.go
@@ -3,7 +3,7 @@ xendit-invoice-service
 
 xendit-invoice-service descriptions
 
-API version: 1.5.0
+API version: 1.6.0
 */
 
 
diff --git a/invoice/model_qr_code.go b/invoice/model_qr_code.go
index bc3fa134..9708a6b9 100644
--- a/invoice/model_qr_code.go
+++ b/invoice/model_qr_code.go
@@ -3,7 +3,7 @@ xendit-invoice-service
 
 xendit-invoice-service descriptions
 
-API version: 1.5.0
+API version: 1.6.0
 */
 
 
diff --git a/invoice/model_qr_code_type.go b/invoice/model_qr_code_type.go
index 9452849f..dec26368 100644
--- a/invoice/model_qr_code_type.go
+++ b/invoice/model_qr_code_type.go
@@ -3,7 +3,7 @@ xendit-invoice-service
 
 xendit-invoice-service descriptions
 
-API version: 1.5.0
+API version: 1.6.0
 */
 
 
diff --git a/invoice/model_retail_outlet.go b/invoice/model_retail_outlet.go
index 37c777dc..e6a7a7b8 100644
--- a/invoice/model_retail_outlet.go
+++ b/invoice/model_retail_outlet.go
@@ -3,7 +3,7 @@ xendit-invoice-service
 
 xendit-invoice-service descriptions
 
-API version: 1.5.0
+API version: 1.6.0
 */
 
 
diff --git a/invoice/model_retail_outlet_name.go b/invoice/model_retail_outlet_name.go
index 8d1c4a13..ec192077 100644
--- a/invoice/model_retail_outlet_name.go
+++ b/invoice/model_retail_outlet_name.go
@@ -3,7 +3,7 @@ xendit-invoice-service
 
 xendit-invoice-service descriptions
 
-API version: 1.5.0
+API version: 1.6.0
 */
 
 
diff --git a/invoice/model_server_error.go b/invoice/model_server_error.go
index d93b0ad2..1dcc7117 100644
--- a/invoice/model_server_error.go
+++ b/invoice/model_server_error.go
@@ -3,7 +3,7 @@ xendit-invoice-service
 
 xendit-invoice-service descriptions
 
-API version: 1.5.0
+API version: 1.6.0
 */
 
 
diff --git a/invoice/model_unauthorized_error.go b/invoice/model_unauthorized_error.go
index 9fcca82c..300e7739 100644
--- a/invoice/model_unauthorized_error.go
+++ b/invoice/model_unauthorized_error.go
@@ -3,7 +3,7 @@ xendit-invoice-service
 
 xendit-invoice-service descriptions
 
-API version: 1.5.0
+API version: 1.6.0
 */
 
 
diff --git a/payment_request/model_payment_callback_data.go b/payment_request/model_payment_callback_data.go
index 7104d9f0..655874cb 100644
--- a/payment_request/model_payment_callback_data.go
+++ b/payment_request/model_payment_callback_data.go
@@ -31,7 +31,7 @@ type PaymentCallbackData struct {
 	PaymentMethod PaymentMethod `json:"payment_method"`
 	ChannelProperties NullablePaymentRequestChannelProperties `json:"channel_properties,omitempty"`
 	PaymentDetail map[string]interface{} `json:"payment_detail,omitempty"`
-	FailureCode map[string]interface{} `json:"failure_code,omitempty"`
+	FailureCode NullableString `json:"failure_code,omitempty"`
 	Created string `json:"created"`
 	Updated string `json:"updated"`
 	Metadata map[string]interface{} `json:"metadata,omitempty"`
@@ -391,36 +391,45 @@ func (o *PaymentCallbackData) SetPaymentDetail(v map[string]interface{}) {
 }
 
 // GetFailureCode returns the FailureCode field value if set, zero value otherwise (both if not set or set to explicit null).
-func (o *PaymentCallbackData) GetFailureCode() map[string]interface{} {
-	if o == nil {
-		var ret map[string]interface{}
+func (o *PaymentCallbackData) GetFailureCode() string {
+	if o == nil || utils.IsNil(o.FailureCode.Get()) {
+		var ret string
 		return ret
 	}
-	return o.FailureCode
+	return *o.FailureCode.Get()
 }
 
 // GetFailureCodeOk returns a tuple with the FailureCode field value if set, nil otherwise
 // and a boolean to check if the value has been set.
 // NOTE: If the value is an explicit nil, `nil, true` will be returned
-func (o *PaymentCallbackData) GetFailureCodeOk() (map[string]interface{}, bool) {
-	if o == nil || utils.IsNil(o.FailureCode) {
-		return map[string]interface{}{}, false
+func (o *PaymentCallbackData) GetFailureCodeOk() (*string, bool) {
+	if o == nil {
+		return nil, false
 	}
-	return o.FailureCode, true
+	return o.FailureCode.Get(), o.FailureCode.IsSet()
 }
 
 // HasFailureCode returns a boolean if a field has been set.
 func (o *PaymentCallbackData) HasFailureCode() bool {
-	if o != nil && utils.IsNil(o.FailureCode) {
+	if o != nil && o.FailureCode.IsSet() {
 		return true
 	}
 
 	return false
 }
 
-// SetFailureCode gets a reference to the given map[string]interface{} and assigns it to the FailureCode field.
-func (o *PaymentCallbackData) SetFailureCode(v map[string]interface{}) {
-	o.FailureCode = v
+// SetFailureCode gets a reference to the given NullableString and assigns it to the FailureCode field.
+func (o *PaymentCallbackData) SetFailureCode(v string) {
+	o.FailureCode.Set(&v)
+}
+// SetFailureCodeNil sets the value for FailureCode to be an explicit nil
+func (o *PaymentCallbackData) SetFailureCodeNil() {
+	o.FailureCode.Set(nil)
+}
+
+// UnsetFailureCode ensures that no value is present for FailureCode, not even an explicit nil
+func (o *PaymentCallbackData) UnsetFailureCode() {
+	o.FailureCode.Unset()
 }
 
 // GetCreated returns the Created field value
@@ -533,8 +542,8 @@ func (o PaymentCallbackData) ToMap() (map[string]interface{}, error) {
 	if o.PaymentDetail != nil {
 		toSerialize["payment_detail"] = o.PaymentDetail
     }
-	if o.FailureCode != nil {
-		toSerialize["failure_code"] = o.FailureCode
+	if o.FailureCode.IsSet() {
+		toSerialize["failure_code"] = o.FailureCode.Get()
     }
 	toSerialize["created"] = o.Created
 	toSerialize["updated"] = o.Updated
diff --git a/payment_request/model_qr_code_channel_code.go b/payment_request/model_qr_code_channel_code.go
index 84ee19c0..15ecd9ad 100644
--- a/payment_request/model_qr_code_channel_code.go
+++ b/payment_request/model_qr_code_channel_code.go
@@ -20,6 +20,7 @@ type QRCodeChannelCode string
 
 // List of QRCodeChannelCode
 const (
+	QRCODECHANNELCODE_QRIS QRCodeChannelCode = "QRIS"
 	QRCODECHANNELCODE_DANA QRCodeChannelCode = "DANA"
 	QRCODECHANNELCODE_RCBC QRCodeChannelCode = "RCBC"
 	QRCODECHANNELCODE_LINKAJA QRCodeChannelCode = "LINKAJA"
@@ -29,6 +30,7 @@ const (
 
 // All allowed values of QRCodeChannelCode enum
 var AllowedQRCodeChannelCodeEnumValues = []QRCodeChannelCode{
+	"QRIS",
 	"DANA",
 	"RCBC",
 	"LINKAJA",
diff --git a/payment_request/model_virtual_account_channel_code.go b/payment_request/model_virtual_account_channel_code.go
index 189670ae..b001858e 100644
--- a/payment_request/model_virtual_account_channel_code.go
+++ b/payment_request/model_virtual_account_channel_code.go
@@ -36,6 +36,9 @@ const (
 	VIRTUALACCOUNTCHANNELCODE_MSB VirtualAccountChannelCode = "MSB"
 	VIRTUALACCOUNTCHANNELCODE_STANDARD_CHARTERED VirtualAccountChannelCode = "STANDARD_CHARTERED"
 	VIRTUALACCOUNTCHANNELCODE_AMBANK VirtualAccountChannelCode = "AMBANK"
+	VIRTUALACCOUNTCHANNELCODE_BNC VirtualAccountChannelCode = "BNC"
+	VIRTUALACCOUNTCHANNELCODE_HANA VirtualAccountChannelCode = "HANA"
+	VIRTUALACCOUNTCHANNELCODE_MUAMALAT VirtualAccountChannelCode = "MUAMALAT"
     VIRTUALACCOUNTCHANNELCODE_XENDIT_ENUM_DEFAULT_FALLBACK VirtualAccountChannelCode = "UNKNOWN_ENUM_VALUE"
 )
 
@@ -57,6 +60,9 @@ var AllowedVirtualAccountChannelCodeEnumValues = []VirtualAccountChannelCode{
 	"MSB",
 	"STANDARD_CHARTERED",
 	"AMBANK",
+	"BNC",
+	"HANA",
+	"MUAMALAT",
     "UNKNOWN_ENUM_VALUE",
 }