1. Account Inquiry

Brief Description:

• Query the balance of the account corresponding to the current business.

URL:

The currency is a path parameter, which should be replaced by the currency you want to query, for example, for USD: /usd/account/ledger.

Currencies use the international standard code, three-letter uppercase code, refer to: Wikipedia-ISO_4217

/{currency}/account/ledger

Parameters:

Parameter	Required	Type	Description
appId	Yes	Long	Business ID (obtained from the backend, must pass the corresponding business ID based on the currency in the URL)
sign	Yes	String	Signature

Response Data:

Parameter	Type	Description
bal	String	Account balance
availableBal	String	Available amount
frzBal	String	Frozen amount
unSettleBal	String	Amount awaiting settlement
sign	String	Signature

2. Asynchronous Notification

Brief Description:

• When the customer's collection is successful or failed, we will push the order status. If the first notification fails, it will retry every 5 minutes, up to 5 times.

URL: Your provided URL, Please configure it in HaiPay's backend or pass it in the request parameters.

Strongly Recommended

To ensure the extensibility and compatibility of the interface, please follow the callback parameters reception method outlined below:

1. Do not declare a specific POJO object to receive callback parameters.
2. Must use a generic data structure (like JSONObject, Map, etc.) to parse parameters.
3. This design ensures that if we later extend the callback fields, it will not affect your signature verification logic.

Reason: Keeping a loosely coupled design can prevent signature verification failures due to the addition or removal of fields.

Collection Callback Parameters:

Parameter	Type	Description
appId	Long	Business ID
currency	String	Currency
orderId	String	Merchant order ID
orderNo	String	Platform order ID
amount	String	Amount collected this time
fee	String	Fee amount
status	Integer	Status (2: Success(Final), 3: Failure(Final), 4: Partial Collection(Final), 5: Excess Collection(Final)). Status 4 and 5 only exist for Stablecoin
payTime	String	Payment success time (present when status=2, 4, 5) (Local time), format: yyyy-MM-dd HH:mm:ss
errorMsg	String	Payment failure reason (present when status=3)
originalCurrency	String	Original order currency, may be empty, only present when currency conversion is involved
originalAmount	String	Original order amount, may be empty, only present when currency conversion is involved
inBankCode	String	Payment method used by the user, refer to each region's documentation, may be empty
bankNo	String	Receiving account, may be empty
description	String	Payment note, may be empty
cardNo	String	Payment card number, credit card payments typically display the first six and last four digits, while ApplePay and GooglePay show only the last four digits, which may be blank
tokenID	String	Payment token, for MIT mode transactions, may be empty
name	String	User name, may be empty
email	String	User email, present for MIT mode transactions
expMonth	String	Payment card expiration month, may be empty
expYear	String	Payment card expiration year, may be empty
ip	String	User IP, may be empty
is3DS	String	Whether 3DS payment is required, true indicates yes, false indicates no, but it only represents whether the bank recommends 3DS payment, not whether 3DS payment was actually used, may be empty
sign	String	Signature,

Payout Callback Parameters:

Parameter	Type	Description
appId	Long	Business ID
currency	String	Currency
orderId	String	Merchant order ID
orderNo	String	Platform order ID
amount	String	Amount collected this time
fee	String	Fee amount
status	Integer	Status (2: Success(Final), 3: Failure(Final))
payTime	String	Payment success time (present when status=2)(Local time), format: yyyy-MM-dd HH:mm:ss
errorMsg	String	Payment failure reason (present when status=3)
hash	String	Transaction hash (present when using Stablecoin, e.g., USDT)
sign	String	Signature,

Collection Link Order Callback Parameters:

Parameter	Type	Description
appId	Long	Business ID
currency	String	Currency
orderId	String	Merchant order ID
orderNo	String	Platform order ID
amount	String	Amount collected this time
fee	String	Fee amount
status	Integer	Status (2: Success(Final), 3: Failure(Final), 4: Partial Collection(Final), 5: Excess Collection(Final)). Currently, status codes 4 and 5 are exclusive to Stablecoin transactions.
payTime	String	Payment success time (present when status=2, 4, 5), format: yyyy-MM-dd HH:mm:ss
errorMsg	String	Payment failure reason (present when status=3)
originalCurrency	String	Original order currency, may be empty, only present when currency conversion is involved
originalAmount	String	Original order amount, may be empty, only present when currency conversion is involved
inBankCode	String	Payment method used by the user, refer to each region's documentation, may be empty
bankNo	String	Receiving account, may be empty
description	String	Payment note, may be empty
cardNo	String	Last four digits of the payment card number , may be empty
createTime	String	Order creation time (Local time), format: yyyy-MM-dd HH:mm:ss
linkNo	String	Collection link number
linkName	String	Collection link name
agentId	Long	Agent ID (empty if there's no agent)
email	String	Payer's email (from the collection link page, random email if not filled)
name	String	Payer's nickname (from the collection link page)
subject	String	Note (filled in the collection link page, randomly generated if not filled)
sign	String	Signature,

Note:

After receiving the callback notification, please return SUCCESS (in uppercase) in the response body without surrounding quotation marks. Otherwise, the notification will continue for 5 more times.

3. Statement File Link Retrieval

Description:

• The file format is the same as the one exported from the merchant backend. The data for the day will be generated the next day after 1:00 PM.

URL:

/common/document/download

Parameters:

Parameter	Required	Type	Description
appId	Yes	Long	Business ID (obtained from the backend)
type	Yes	Long	Type: 15 for payout orders, 20 for collection orders, 40 for fund flow data
date	Yes	String	Date, format: yyyyMMdd
sign	Yes	String	Signature

Response Data:

Parameter	Type	Description
appId	Long	Business ID (obtained from the backend)
type	Long	Type: 15 for payout orders, 20 for collection orders, 40 for fund flow data
date	String	Date, format: yyyyMMdd
fileUrl	String	File download URL
expired	String	Expiry time, 1 hour
sign	String	Signature

Field Descriptions

Collection

• Error: Collection exception
• Not Started: Not started
• Paying: Collecting
• Success: Collection successful
• Failed: Collection failed
• Payment Part Success: Partial collection
• Payment Excess Success: Excess collection

Payout

• Submit Error: Submission exception
• Error: Payout exception
• Not Started: Not started
• Pending: Payout in progress
• Success: Payout successful
• Failed: Payout failed

Notification Status

• Not Start: Not notified
• Success: Notification successful
• Failed: Notification failed
• Error: Notification exception

Settlement Status

• Error: Exception pending confirmation
• Not Start: Not started
• Settling: Settling
• Success: Settlement successful
• Settlement Failed (Reversed): Settlement failed (reversed)

4. Payout Order Voucher

URL:

/common/voucher

Parameters:

Parameter	Required	Type	Description
appId	Yes	Long	Business ID (obtained from the backend)
orderNo	Yes	Long	Platform order ID
sign	Yes	String	Signature

Response Data:

• The base64 encoded image of the voucher.

5. Real-Time Exchange Rate Query

Description:

• Query exchange rates for converting USD to other currencies, only USD settlement payment methods are supported

URL:

/common/quote/v1/exchange-rate

Parameters:

Parameter Name	Required	Type	Description
appId	Yes	Long	Business ID (obtained from the admin console)
sourceCurrency	Yes	String	Source currency (USD)
targetCurrency	Yes	String	Target currency
payType	No	String	Payment type
inBankCode	No	String	Payment method
sign	Yes	String	Signature

Return data parameter description

Parameter Name	Type	Description
sourceCurrency	String	Source currency (USD)
targetCurrency	String	Target currency
payType	String	Payment type
inBankCode	String	Payment method
exchangeRate	String	Exchange rate
sign	String	Signature