Quick Pay - POS Scanner

Process Flow

Flow diagram

Explanation

• Step 1: User logs in MoMo app, selects MÃ THANH TOÁN (Payment Code) to create a payment code (paymentCode).
• Step 2: Cashier scans Bar code (or QR code) on the user’s screen to get paymentCode, and the information will be sent to partner’s POS server.
• Step 3: POS Server packs and sends received transaction information to MoMo’s server for authorization.
• Step 4: MoMo’s Server processes the request and returns the authorization result to POS server. If failed (cannot make authorization), transaction ends here. If succeed, MoMo’s server will call ipnUrl if have config (API provided by partner in MoMo’s format, view detail to notify order payment status.
• Step 5: (Not necessary if autoCapture=true in step 3) POS Server receives result returned from MoMo’s Server, processes and send corresponding request to MoMo’s server to confirm the transaction (capture or cancel) depending on the result of the processing.
• Step 6: MoMo’s Server processes the confirm request and returns result to POS server.

API Configuration

HTTP Information

Payment Processing

Describe data the POS server sends through the MoMo server to authorization.

Minimum timeout when call this API must be 30s to ensure receive response from MoMo.

HTTP Request

POST /v2/gateway/api/pos

Parameter	Type	Required	Description
partnerCode	String		Integration information
subPartnerCode	String		Sub partner Id
storeId	String		Store ID
storeName	String		Partner store name
orderId	String		Partner Transaction ID Regex: ^[0-9a-zA-Z]([-_.]*[0-9a-zA-Z]+)*$
amount	Long		Payment amount Min: 1.000 VND Max: 5.000.000 VND Currency: VND.
requestId	String(50)		Request ID, unique for each request, MoMo's partner uses the requestId field for idempotency control
paymentCode	String		Encrypt a String Payment code created from MoMo app that is scanned by cashier by RSA using public Key RSA Encryption
orderInfo	String		Short information
orderGroupId	Long		The orderGroupId will be provided by MoMo to classify groups of orders for further operational activities. Please contact MoMo to use this field.
autoCapture	Boolean		If set to false, the payment will not be automatically captured.
ipnUrl	String		Merchant’s API Endpoint. Used by MoMo to send payment results via IPN method (server-to-server)
extraData	String		Default value is empty "" Encode base64 follow Jsonformat: {"key": "value"} Example with data: {"username": "momo"}=> data of extraData: eyJ1c2VybmFtZSI6ICJtb21vIn0=
items	List		List of products displayed on the payment page. Maximum: 50 items
userInfo	Object		Info of the customer
requestTime	Long		Time partner send request to MoMo. Format: timestamp Example: 1692783998394
lang	String		Language of returned message (vi or en)
signature	String		Signature to confirm information. Secure transaction in Hmac_SHA256  algorithm with format, a String sort all key name of data field from a-z: accessKey=$accessKey&amount=$amount&extraData=$extraData &orderId=$orderId&orderInfo=$orderInfo&partnerCode=$partnerCode &paymentCode=$paymentCode&requestId=$requestId

Details of an items

It is not required to add items. Howvever, each item added must have these fixed keys:

Attribute	Type	Required	Description
id	String		SKU number
name	String		Name of the product
description	String		Description of the product
category	String		Product classification/Product category
imageUrl	String		Link image of product
manufacturer	String		Name of manufacturer
price	Long		Unit price
currency	String		VND
quantity	Integer		Quantity number of the product. It must be greater than 0
unit	String		The units of measurement used for products
totalPrice	Long		Total price = price x quantity
taxAmount	Long		Total amount of tax

Details of userInfo content

If this is provided, customer as MoMo user will be receive a notification or email (by choices).

Attribute	Type	Required	Description
name	String		Name of the customer as registered on merchant site
phoneNumber	String		Phone number of the customer as registered on merchant site
email	String		Email address of the customer as registered on merchant site

HTTP Response

Attribute	Type	Required	Description
partnerCode	String		Integration information
orderId	String		Partner Transaction ID Regex: ^[0-9a-zA-Z]([-_.]*[0-9a-zA-Z]+)*$entification
requestId	String		Each Request’s Identification
amount	Long		Payment amount Min: 1.000 VND Max: 5.000.000 VND Currency: VND.
transId	Long		MoMo's transaction ID
responseTime	Long		Time to respond payment results to partner. Format: timestamp
resultCode	Integer		Order status
message	String		Result description, language is based on lang

Processing payment result

For more information, see Payment Notification.

Parameter description

Description for parameters which are used by MoMo in the body content of ipnUrl.

Attribute	Type	Required	Description
partnerCode	String		Integration Information
orderId	String		Partner Transaction ID
requestId	String		Partner's requestId
amount	Long		Payment amount
orderInfo	String		Order's information
orderType	String		momo_wallet
partnerUserId	String		MoMo's unique identifier for each MoMo eWallet account.
transId	Long		MoMo's transaction ID
resultCode	Integer		Transaction status of the order Result Code
message	String		Error description, languague is based on lang
payType	String		Payment type: pos
responseTime	Long		Time to respond payment results to partner Format: timestamp
extraData	String		Extra Data. Default: ""
signature	String		Signature to confirm information. Secure transaction in Hmac_SHA256  algorithm with format: a String sort all key name of data field from a-z: accessKey=$accessKey&amount=$amount&extraData=$extraData &message=$message&orderId=$orderId&orderInfo=$orderInfo &orderType=$orderType&partnerCode=$partnerCode&payType= $payType&requestId=$requestId&responseTime= $responseTime&resultCode=$resultCode&transId=$transId

Result Codes & Messages

These result codes and messages are exclusively assigned for Quick Pay - POS Scanner. Additionally, kindly locate other result codes and messages in the comprehensive list of result codes provided here.

Result code	Description	Final Status	Recommended actions	Type
0	Successful.	Yes
44	Transaction rejected due to invalid paymentCode.	No	The payment code format is incorrect. Please check if user does not use MoMo Payment QR, or strange characters has been added accidentally during scanning due to POS problem. A valid payment code should follow 1 of these formats: "MM"" + "18 digit" => example: MM561918531775222861 "mm"" + "18 digit" => example: mm561918531775222861 "18 digit" => example: 561918531775222861	User error
4005	Transantion rejected due to consumer's QR Code has expired or invalid.	Yes	Please ask the consumer to refresh their personal QR Code.	User error

See also

• Check Transaction Status
• Reverse & Refund
• Confirm Payment