WLAN/LAN mode API list

Communication protocol

CodePay Register uses the WebSocket protocol to implement the server side. WebSocket is a technology used for arbitrary two-way data transfer between the client and the server. The WebSocket protocol is implemented based on the TCP protocol and consists of an initial handshake and subsequent two-way transfer of multiple data frames. Its purpose is in the WebSocket client and WebSocket server for frequent two-way communication, can make the server to avoid opening multiple HTTP connections to work to save resources, improve the efficiency and resource utilization.

Message structure

Field format

POS application and CodePay Register communicate in JSON format

Common data

Different aspects of each field are defined in this document according to the following conventions.

• M: Required parameters
• C: Required parameters when some conditions are met
• O: Optional parameters
• -: Not Present The common parameters is as follows:

Key	Parameter type	Request	Response	Description
topic	string	M	M	Message topic identifier. Please refer to the topic Example: ecrhub.pay.order
request_id	string	C	C	Transaction Request ID, used to receive the corresponding response. The caller needs to remain unique.This parameter must be present when using terminal confirmation mode.
timestamp	string	O	O	Timestamp Example: 1698302992263
version	string	O	O	The API version. fixed value:1.0 Example: 1.0
app_id	string	M	M	The payment app id registered in Codepay Gateway, Please refer to the Payment gateway integration guide
biz_data	JSONObject	M	M	Business Data. each transaction type has own business data
response_code	string	-	M	The order payment status code returned by CodePay Register, 000 means the transaction was successful, other means the transaction failed.Please refer to Response code
response_msg	String	-	C	Failed transaction error message returned by CodePay Register

Input parameter structure diagram

Output parameter structure diagram

Topic

Each transaction type has a message topic:

Key	Name
ecrhub.pay.order	Submit transaction
ecrhub.pay.query	Query transaction
ecrhub.pay.close	Close transaction

Transaction message

1. Submit transaction

Message Topic

ecrhub.pay.order

Parameter list

Name	Type	Request	Response	Description
trans_type	String	M	M	Transaction type. Please refer to Transaction type Example: 1
merchant_order_no	String	M	M	Merchant order number.This field represents the order number for the refund request when refunded, different from the order number of the original consumer transaction. No more than 32 alphanumeric characters. Example: 121775014073233018
orig_merchant_order_no	String	C	C	Original merchant order number. If the transaction type is Void, Refund, Completion, it must be required. (trans_type = 2,3,6) Example: 121775014073233368018
price_currency	String	O	O	Price Currency, compliant with ISO-4217 standard, described with a three-character code Example：USD
order_amount	String	M	M	Order amount. This field represents the transaction ordered amount, For example, one USD stands for one dollar, not one cent. Example: 34.50
tip_amount	String	O	O	Tip amount. This field represents the transaction tip amount. For example, 1 USD stands for one dollar, not one cent. Example: 34.50
on_screen_tip	boolean	O	O	Whether or not to enter tips on the CodePay Register page, default is false, when "trans_type=1, 3, 4", this parameter can be set Example: true
cashback_amount	String	O	O	Cashback amount. Expressed in the quoted currency, for example, One USD stands for one dollar, not one cent Example: 10.00
pay_method_id	String	O	O	Payment method id. Please Refer to Payment method If the TransType is 3, this parameter will not required Example:Visa
pay_scenario	String	O	O	Payment scene, please refer to PayScenario Example: SWIPE_CARD
card_type	String	O	O	Type of bank card,please refer to Card type
attach	String	O	O	Additional data.Allows merchants to submit additional data, which will be returned as is. Example: abc123
description	String	O	O	Description of ordered goods or services.A brief description of the goods or services purchased by the customer. Example: IPhone White X2
notify_url	String	O	O	Callback address for payment notification.Receive payment notifications from the CodePay gateway to call back the server address, and only when the transaction goes through the Codepay payment gateway will there be a callback. Example: http://www.abc.com/callback?id=12345
expires	String	O	O	Order expires time, after the expires time is not allowed to be paid, unit: seconds Example: 180
confirm_on_terminal	boolean	O	O	Do you need terminal confirmation before proceeding with payment operations? The default is false. When set to true, you need to confirm the order first, otherwise you will directly enter the card reading interface
required_terminal_authentication	boolean	O	O	When refund or void a transaction, does the store manager role need to authorize this operation on the terminal? default value: false
on_screen_signature	boolean	O	O	This parameter controls the display logic of electronic signatures: true: Display the electronic signature page and print the signature information on the purchase order false: The electronic signature page will not be displayed, but the signature area needs to be printed on the purchase order But even if this parameter is set, CodePay Register still processes electronic signatures according to the following logic in the following situations: Credit card network, APP does not display signature page, fixed on receipt to print signature column Pin debit transactions do not require a signature, the APP does not display a signature page, and the receipt is not printed either
trans_no	String	-	M	Transaction number of Codepay. which uniquely identifies a transaction. Example: 5021000010210602000003
trans_status	String	-	M	Transaction status, please refer to Transaction status
pay_channel_trans_no	String	-	O	Payment channel transaction serial number, If trans_status is 2, the returned data will include this parameters, such as Visa, Mastercard and other payment platforms. Example: 000000123
discount_bmopc	string	-	O	Payment channel merchant discount amount, If trans_status is 2, the returned data will include this parameters, The merchant gives the customer a preferential amount through the payment channel, and this part of the payment channel will not be settled to the merchant. Example: 3.00
discount_bpc	string	-	O	Payment channel discount amount,If trans_status is 2, the returned data will include this parameters. Discount the amount of the payment channel to the customer, and this part of the funds will be settled into the merchant account. Example: 5.00
trans_end_time	string	-	O	Transaction completed time. If trans_status is 2, the returned data will include this parameters. Timezone: Local time zone, the time zone set by the payment terminal, Format: YYYY-MM-DD HH:mm:ss Example: 2021-06-03 12:48:51

2. Query transaction

Message Topic

ecrhub.pay.query

Parameter list

Name	Type	Request	Response	Description
merchant_order_no	String	M	M	Merchant order number.This field represents the order number for the refund request when refunded, different from the order number of the original consumer transaction. No more than 32 alphanumeric characters. Example: 121775014073233018
trans_type	String	-	M	Transaction type. Please refer to Transaction type Example: 1
price_currency	String	-	M	Price Currency, compliant with ISO-4217 standard, described with a three-character code Example：USD
order_amount	String	-	M	Order amount. This field represents the transaction ordered amount, For example, one USD stands for one dollar, not one cent. Example: 34.50
tip_amount	String	-	O	Tip amount. This field represents the transaction tip amount. For example, 1 USD stands for one dollar, not one cent. Example: 34.50
cashback_amount	String	-	O	Cashback amount. Expressed in the quoted currency, for example, One USD stands for one dollar, not one cent Example: 10.00
attach	String	-	O	Additional data.Allows merchants to submit additional data, which will be returned as is. Example: abc123
trans_no	String	-	M	Transaction number of Codepay. which uniquely identifies a transaction. Example: 5021000010210602000003
trans_status	String	-	M	Transaction status, please refer to Transaction status
pay_scenario	String	-	O	Payment scene, If trans_status is 2, the returned data will include the following parameters, please refer to Please Refer to PayScenario Example: SWIPE_CARD
pay_method_id	String	-	O	Payment method id. If trans_status is 2, the returned data will include the following parameters. Please Refer to Payment method If the TransType is 3, this parameter will not required Example:Visa
pay_channel_trans_no	String	-	O	Payment channel transaction serial number, If trans_status is 2, the returned data will include the following parameters, such as Visa, Mastercard and other payment platforms. Example: 000000123
discount_bmopc	string	-	O	Payment channel merchant discount amount,If trans_status is 2, the returned data will include the following parameters. The merchant gives the customer a preferential amount through the payment channel, and this part of the payment channel will not be settled to the merchant. Example: 3.00
discount_bpc	string	-	O	Payment channel discount amount, If trans_status is 2, the returned data will include the following parameters. Discount the amount of the payment channel to the customer, and this part of the funds will be settled into the merchant account. Example: 5.00
trans_end_time	string	-	O	Transaction completed time. If trans_status is 2, the returned data will include the following parameters. Timezone: Local time zone, the time zone set by the payment terminal, Format: YYYY-MM-DD HH:mm:ss Example: 2021-06-03 12:48:51

3. Close transaction

Message Topic

ecrhub.pay.close

Parameter list

Name	Type	Request	Response	Description
merchant_order_no	String	C	C	Merchant order number.This field represents the order number for the refund request when refunded, different from the order number of the original consumer transaction. No more than 32 alphanumeric characters. Example: 121775014073233018 .This parameter must be present when using terminal confirmation mode.