Create Pay-in Order (/payin/create)

Description

The merchant invokes this endpoint to initiate a pay-in (collection/deposit) request. The platform creates the transaction and returns a cashier checkout URL (payUrl).

---

Request Information

• Endpoint: /payin/create
• Method: POST
• Content-Type: application/json; charset=utf-8

---

HTTP Headers

Header	Required	Type	Description
merchantNo	Yes	String	Merchant ID assigned by the platform
sign	Yes	String	Base64-encoded RSA digital signature of the request body

---

Request Body Parameters

Parameter	Required	Type	Example	Description
timestamp	Yes	Long	1772880000000	Current epoch timestamp in milliseconds
merchantOrderNo	Yes	String	202603070001	Unique order reference generated by the merchant system
amount	Yes	String	220.00	Transaction amount (maximum 2 decimal places)
payType	Yes	String	BKASH	Payment method channel; supported values: BKASH (bKash wallet), NAGAD (Nagad wallet)
notifyUrl	Yes	String	https://api.merchant.com/payin/notify	Asynchronous webhook callback URL
name	No	String	Rahim Uddin	Customer full name
mobile	No	String	01712345678	Customer mobile number (10-11 digits starting with 01)
email	No	String	user@example.com	Customer email address
remark	No	String	Test Order	Custom remarks (echoed back in callback)

Request Payload Example

{
  "timestamp": 1772880000000,
  "merchantOrderNo": "202603070001",
  "amount": "220.00",
  "payType": "BKASH",
  "notifyUrl": "https://api.merchant.com/payin/notify",
  "name": "Rahim Uddin",
  "mobile": "01712345678",
  "email": "user@example.com",
  "remark": "Test Order"
}

---

Response Parameters

Success Response

{
  "code": 1,
  "msg": "success",
  "data": {
    "merchantNo": "M1639466186292",
    "merchantOrderNo": "202603070001",
    "platOrderNo": "876324486452871168",
    "amount": "220.00",
    "fee": "0",
    "payUrl": "https://gateway.example.com/checkout/876324486452871168",
    "expireTime": "2026-05-05 11:11:11",
    "status": "1",
    "payAccountNo": "01666777888"
  }
}

Failure Response

{
  "code": 0,
  "msg": "param merchant error"
}

Response Fields Description

Field	Type	Description
code	Integer / String	Response code: 1 indicates success, 0 indicates failure
msg	String	Message description
data	Object	Payload data object (null if code is 0)
data.merchantNo	String	Merchant ID
data.merchantOrderNo	String	Merchant order number
data.platOrderNo	String	Platform transaction number
data.amount	String	Order transaction amount
data.fee	String	Service processing fee
data.payUrl	String	Cashier checkout page redirect URL
data.expireTime	String	Order expiration timestamp (yyyy-MM-dd HH:mm:ss)
data.status	String	Order status: 0: Created 1: Expired 2: Failed 3: Succeeded
data.payAccountNo	String	Receiving account number