Collection Link

Process Flow

Explanation

• Step 1: Customers check out the order after shopping in-store/online
• Step 2: Merchant send request to MoMo for Collection Link (attach Merchant credential)
• Step 3: MoMo authenticates through the merchant profile and generates a collection link and returns it to the merchant.
• Step 4: There are 3 use cases:
  • Case 1: Merchant is an online sales channel, after receiving the link, the system will automatically navigate to MoMo's payment page
  • Case 2: Merchants are offline stores using POS machines, the system sends the link via Email/SMS of the buyer, then the buyer will open the link to go to the payment page of MoMo.
  • Case 3: Merchants are SaaS (Software as a Service) partners, they will send a direct link through the buyer's chat channel, then the buyer clicks the link to go to MoMo's payment page.
• Step 5: Depending on the device, MoMo will display the corresponding web or mobile web interface.
• Step 6: Customers check order information, then choose one of the following methods: pay by MoMo E-wallet, pay by ATM card or pay by Visa/Master/JCB card.
• Step 7: Depending on the payment method chosen, proceeds accordingly:
  • 7.1. Redirect to QRC payment page: Display the interface depending on the device that the customer is using. In case the device is a desktop or tablet, the payment information and QRC image will be displayed. In case the device is mobile, only payment information** will be displayed, if the customer has installed the MoMo app, the system will recognize it and go straight to the next step.
  • 7.2. Redirect to ATM payment page: Display order information and ask user to enters ATM card information before paying. The customer check order information, enter card information and confirm payment. Depending on the customer's device, it can display a desktop or webview interface.
  • 7.3. Redirect to Visa/Master/JCB payment page: Display order information and ask user to enter international card information before paying. The customer check order information, enter card information and confirm payment. Depending on the customer's device, it can display a desktop or webview interface.
• Step 8: After scanning the QRC on the desktop or opening it directly from Mobile, the customer is directed to a secure payment confirmation screen, then clicks 'Confirm payment'.
• Step 9: MoMo's Payment Gateway processes the payment, then returns the payment transaction result to Merchant

API Configuration

HTTP Information

Initiate Payment Method

On the merchant's payment page, after customers choose to pay with MoMo E-wallet, merchant server needs to call MoMo's API payWithMethod to get payment methods and then apply suitable ones to their platforms.

requestType: Identify the type of the request

HTTP Request

POST /v2/gateway/api/create

Attribute	Type	Required	Description
partnerCode	String		Integration information
storeId	String		Store ID
requestId	String(50)		Request ID, unique for each request, MoMo's partner uses the requestId field for idempotency control
amount	Long		Amount needs to be paid Min: 1.000 VND Max: 50.000.000 VND Currency: VND Data type: Long Note: The payment method for ATM cards and Credit cards is enabled for transactions with a minimum amount of 10,000 VND.
orderId	String		Partner Transaction ID Regex: ^[0-9a-zA-Z]([-_.]*[0-9a-zA-Z]+)*$
orderInfo	String		Order's information
redirectUrl	String		A partner's URL. This URL is used to redirect from MoMo page to partner's page after customer's payment. Support: AppLink and WebLink
ipnUrl	String		Partner API. Used by MoMo to submit payment results by IPN method (server-to-server) method
requestType	String		payWithMethod
extraData	String		Encode base64 follow Jsonformat: {"key": "value"} Example with data: {"email": "example@gmail.com"}=> data of extraData: eyJlbWFpbCI6ICJleGFtcGxlQGdtYWlsLmNvbSJ9
items	List		List of products displayed on the payment page. Example Data: [{"image": "https://momo.vn/uploads/product1.jpg", "name": "Product 1", "quantity": 1, "amount": 20000}, {"image": "https://momo.vn/uploads/product2.jpg", "name": "Product 2", "quantity": 2, "amount": 30000}]
userInfo	Object		User Info Example Data: {"phoneNumber": "0123456789", "email": "momo@momo.vn", "name": "momo" }
autoCapture	Boolean		If set to false, the payment will not be automatically captured. Note: autoCapture = 'false' only applies to payment methods via MoMo e-Wallet and Credit card
lang	String		Language of returned message (vi or en)
signature	String		Signature to confirm information. Secure transaction in Hmac_SHA256 with format: a String sort all key name of data field from a-z: accessKey=$accessKey&amount=$amount&extraData=$extraData &ipnUrl=$ipnUrl&orderId=$orderId&orderInfo=$orderInfo &partnerCode=$partnerCode&redirectUrl=$redirectUrl &requestId=$requestId&requestType=$requestType

Details of items content

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: VND
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

Example Item

{
  "id": "204727",  
  "name": "YOMOST Bac Ha&Viet Quat 170ml",  
  "description": "YOMOST Sua Chua Uong Bac Ha&Viet Quat 170ml/1 Hop",
  "category": "beverage",
  "imageUrl":"https://momo.vn/uploads/product1.jpg",
  "manufacturer":"Vinamilk",
  "price": 11000,               
  "quantity": 5,
  "unit":"hộp",
  "totalPrice": 55000,
  "taxAmount":"200"
}

Details of userInfo content

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

Example UserInfo

{
    "name": "Nguyen Van A",
    "phoneNumber": "0999888999",
    "email": "email_add@domain.com"
}

Redirecting information (redirectUrl)

WebLink: Link to open website.

AppLink: Link to open mobile application.

Learn more about AppLink

• Android: https://developer.android.com/training/app-links
• IOS: https://developer.apple.com/documentation/uikit/core_app/..

Example Request

{
  "partnerCode": "MOMO",
  "partnerName" : "Test",
  "storeId" : "MoMoTestStore",
  "requestType": "payWithMethod",
  "ipnUrl": "https://momo.vn",
  "redirectUrl": "https://momo.vn",
  "orderId": "MM1540456472575",
  "amount": 150000,
  "lang":  "vi",
  "orderInfo": "SDK team.",
  "orderExpireTime" : 30,
  "requestId": "MM1540456472575",
  "extraData": "eyJ1c2VybmFtZSI6ICJtb21vIn0=",
  "signature": "fd37abbee777e13eaa0d0690d184e4d7e2fb43977281ab0e20701721f07a0e07"
}

HTTP Response

List of payment methods that MoMo provides:

Attribute	Type	Required	Description
partnerCode	String		Integration information
requestId	String		Same as the original request
orderId	String		Partner Transaction ID Regex: ^[0-9a-zA-Z]([-_.]*[0-9a-zA-Z]+)*$
amount	Long		Same as the original payment amount
responseTime	Long		Time to respond payment results to partner Format: timestamp
message	String		Error description, error language is based on lang
resultCode	Integer		Result Code
payUrl	String		URL for switching from the partner's page to the MoMo payment page
shortLink	String		A short URL represents a payUrl containing parameters in a smaller and simpler format

Example response

{
  "partnerCode": "MOMO",
  "requestId": "MM1540456472575",
  "orderId": "MM1540456472575",
  "amount": 150000,
  "responseTime": 145256987,
  "message": "Thành công",
  "resultCode": 0,
  "payUrl": "https://test-payment.momo.vn/v2/gateway/pay?t=TU9NT1NKSTEyMDE5MDgyM3wxNjEzNTMyMDk3OTIyOjAxMjM0NTY3Nzg="
  "shortLink": "https://test-payment.momo.vn/shortlink/smTZN2oL2s"
}

Payment

You need to install MoMo Test app and use MoMo TEST Account to process payment.

Payment guideline: Login > Home screen > Scan QR.

Processing payment result

For more information, see Payment Notification.

Parameter description

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

Attribute	Type	Required	Description
partnerCode	String		Integration Information
orderId	String		Partner Transaction ID Regex: ^[0-9a-zA-Z]([-_.]*[0-9a-zA-Z]+)*$
requestId	String		Partner's requestId
amount	Long		Payment amount
orderInfo	String		Order's information
partnerUserId	String		MoMo's unique identifier for each MoMo eWallet account.
orderType	String		momo_wallet
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: qr, webApp, credit or napas
responseTime	Long		Time to respond payment results to partner Format: timestamp
extraData	String		extraData. 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

See also

• Check Transaction Status
• Reverse & Refund
• Confirm Payment