Introduction

WeChat Pay, officially referred to as Weixin Pay in China, is a mobile payment and digital wallet service by WeChat based in China that allows users to make mobile payments and online transactions. As of March 2016, WeChat Pay had over 300 million users. WeChat Pay's main competitor in China and the market leader in online payments is Alibaba Group's Alipay.

Alibaba company founder Jack Ma considered the red envelope feature to be a "Pearl Harbor moment", as it began to erode Alipay's historic dominance in the online payments industry in China, especially in peer-to-peer money transfer. The success prompted Alibaba to launch its own version of virtual red envelopes in its competing Laiwang service. Other competitors, Baidu Wallet and Sina Weibo, also launched similar features.

Integrations

POST Request - Pre-/ Authorization
Account Parameters
request
required
Fixed Value: preauthorisation/authorization
mid
required
your merchant ID, 5-digit numeric
aid
required
your subaccount ID, 5-digit numeric
portalId
required
your Portal ID, 7-digit numeric
key
required
your key value, alpha-numeric
common Parameters
clearingtype
required
Fixed Value: wtl
mode
required
Fixed Value: test/live

Can be either test environment (test) or live environment (live)
reference
optional
Format CHAR(2..255)

A unique ID that will be displayed in your shop backend and for the customer
amount
required
Format NUMERIC(1..10)
Permitted values max. +/- 19 999 999 99

Specifies the total gross amount of a payment transaction.

Value is given in smallest currency unit, e.g. Cent of Euro.

The amount must be less than or equal to the amount of the corresponding booking.
currency
required
Format LIST
Permitted values ISO 4217 (currencies) 3-letter-codes
Samples

EUR

USD

GBP
param
optional
Format CHAR(1..255)

Individual parameter (per payment process)
narrative_text
optional
Format CHAR(1..81)

Dynamic text element on account statements (3 lines with 27 characters each) and credit card statements.
customer_is_present
optional
Format LIST
Permitted Values yes /no

Indicates whether customer is “present” and can enter their data in the shop (=yes). Or customer is not present and can not enter any data (=no).
PERSONAL DATA Parameters
customerid
optional
Format CHAR(1..20)
Permitted Symbols [0-9, a-z, A-Z, .,-,_,/]

Merchant's customer ID, defined by you / merchant to refer to the customer record.

"customerid" can be used to identify a customer record. 
If "customerid" is used then stored customer data are loaded automatically.
userid
optional
Format NUMERIC(6..12)

PAYONE User ID, defined by PAYONE
businessrelation
optional
Format LIST
Value Comment
b2c

Indicates business to private customer
b2b

indicates business to business customer (company)

Value specifies business relation between merchant and customer
salutation
optional
Format CHAR(1..10)

The customer's salutation
title
optional
Format CHAR(1..20)
Samples

Dr

Prof.

Dr.-Ing.

Title of the customer
firstname
optional
Format CHAR(1..50)

First name of customer; optional if company is used, i.e.: you may use "company" or "lastname" or "firstname" plus "lastname"
lastname
required
Format CHAR(2..50)

Last name of customer; optional if company is used, i.e.: you may use "company" or "lastname" or "firstname" plus "lastname"
company
optional
Format CHAR(2..50)

Comany name of customer; optional if company is used, i.e.: you may use "company" or "lastname" or "firstname" plus "lastname"
street
optional
Format CHAR(1..50)

Street number and name (required: at least one character)
addressaddition
optional
Format CHAR(1..50)
Samples

7th floor

c/o Maier

Specifies an additional address line for the invoice address of the customer.
zip
optional
Format CHAR(2..50)
Permitted Symbols [0-9][A-Z][a-z][_.-/ ]

Postcode
city
optional
Format CHAR(2..50)

City of customer
country
required
Fixed Value DE
state
required
Format LIST
Permitted values ISO 3166-2 States (regions) 2-letter-codes
Samples US Samples CA
AK

AB
AL

BC

Specifies state / region of country for the customer.
"state" is required for these countries: US, CA, CN, JP, MX, BR, AR, ID, TH, IN and must not be used for all other countries.
email
optional
Format CHAR(5..254)

Mandatory if "add_paydata[shopping_cart_type]=DIGITAL"

Permitted Symbols RFC 5322

Special Remark email validation:

Max. length for email is 254 characters. Validation is set up in the following way:

Username = Max. 63 characters

Domain Name = Max. 63 characters
Domain Suffixes = Max. 4 suffixes with max. 124 characters
Example: username[63]@domain_name[63].suffix[60].suffix[60].suffix[4]

"@" and "." is counted as a character as well; in case of a total of three suffixes, this would allow a total of 254 characters.

email-address of customer
telephonenumber
optional
Format CHAR(1..30)

Phone number of customer
birthday
optional
Format DATE(8), YYYYMMDD
Samples

20190101

19991231

Date of birth of customer
language
optional
Format LIST
Permitted values ISO 639-1 (Language)2-letter-codes

Language indicator (ISO 639) to specify the language that should be presented to the customer (e.g. for error messages, frontend display).

If the language is not transferred, the browser language will be used. For a non-supported language English will be used.
vatid
optional
Format CHAR(1..50)

VAT identification number. Used for b2b transactions to indicate VAT number of customer.
gender
optional
Format LIST
Permitted values f / m / d

Gender of customer (female / male / diverse* )

* currently not in use
personalid
optional
Format CHAR(1..32)
Permitted Symbols [0-9][A-Z][a-z][+-./()]

Person specific numbers or characters, e.g. number of passport / ID card
ip
optional
Format CHAR(1..39)

Customer's IP-V4-address (123.123.123.123) or IP-V6-address
Delivery data Parameters
shipping_firstname
required
Format CHAR(1..50)

First name of delivery address
shipping_lastname
required
Format CHAR(1..50)

Surname of delivery address
shipping_company
optional
Format CHAR(2..50)

Company name of delivery address
shipping_street
optional
Format CHAR(2..50)

Street number and name of delivery address
shipping_zip
required
Format CHAR(2..50)

Postcode of delivery address
shipping_addressaddition
optional
Format CHAR(1..50)

Specifies an additional address line for the delivery address of the customer, e.g. "7th floor", "c/o Maier".
shipping_country
optional
Format LIST
Permitted values ISO 3166 2-letter-codes
Samples

DE

GB

US

Specifies country of address for the customer.

Some countries require additional information in parameter "state"
shipping_state
required (in CN)
Format LIST
Permitted values ISO 3166-2 States (regions) 2-letter-codes
Samples US Samples CA
AK AB
AL BC
Wallet PARAMETERS
wallettype
required
Fixed Value WCP
successurl
required
Format CHAR(2..255)

Scheme <scheme>://<host>/<path>
       <scheme>://<host>/<path>?<query>
       
scheme-pattern: [a-zA-Z]{1}[a-zA-Z0-9]{1,9}

URL for "payment successful"
errorurl
required
Format CHAR(2..255)

Scheme <scheme>://<host>/<path>
       <scheme>://<host>/<path>?<query>
       
scheme-pattern: [a-zA-Z]{1}[a-zA-Z0-9]{1,9}

URL for "faulty payment"
backurl
required
Format CHAR(2..255)

Scheme <scheme>://<host>/<path>
       <scheme>://<host>/<path>?<query>
       
scheme-pattern: [a-zA-Z]{1}[a-zA-Z0-9]{1,9}

URL for "Back" or "Cancel"
Article Parameters
it[n]
optional
Format LIST
it[n] Comments
goods Goods
shipment Shipping Charges
handling Handling fee
voucher Voucher / discount
id[n]
optional
Format CHAR(1..32)
Array elements [n] starting with [1]; serially numbered; max [400]
Permitted Symbols [0-9][a-z][A-Z], .,-,_,/

International Article Number (EAN bzw. GTIN)

Product number, SKU, etc. of this item
pr[n]
optional
Format NUMERIC(10) max. 19 999 999 99
Array elements [n] starting with [1]; serially numbered; max [400]

Unit gross price of the item in smallest unit! e.g. cent
no[n]
optional
Format NUMERIC(6)
Array elements [n] starting with [1]; serially numbered; max [400]

Quantity of this item
de[n]
optional
Format CHAR(1..255)
Array elements [n] starting with [1]; serially numbered; max [400]

Description of this item. Will be printed on documents to customer.
va[n]
optional
Format NUMERIC(4)

VAT rate (% or bp)

Array elements [n] starting with [1]; serially numbered; max [400]
Response Parameters
Permitted Values
APPROVED
ERROR
Response Parameter (approved)
txid
Format NUMERIC(9..12)

The txid specifies the payment process within the PAYONE platform
Format NUMERIC(6..12)

PAYONE User ID, defined by PAYONE
Response Parameter (Error)
Format NUMERIC(1..6)

In case of error the PAYONE Platform returns an error code for your internal usage.
Format CHAR(1..1024)

In case of error the PAYONE Platform returns an error message for your internal usage.
Format CHAR(1..1024)

The customermessage is returned to your system in order to be displayed to the customer.

(Language selection is based on the end customer's language, parameter "language")

 
Host: api.pay1.de
Content-Type: application/x-www-form-urlencoded
Payload               

https://api.pay1.de/post-gateway/
aid=52078
amount=100
api_version=3.10
backurl=https://www.yourdomain.com/backurl
clearingtype=wlt
country=DE
currency=EUR
encoding=UTF-8
errorurl=https://www.yourdomain.com/error
hash=7ebd46ee831b385a919dfd266f2771411a81878a07583782b30edb3e2d99da071ada7ca79f9ed1b5c8a63f4002273709
key=17031f73e2c6f9755788bddfff04169b
lastname=Test
mid=14648
mode=test
portalid=2037267
reference=3795667038580
request=preauthorization
successurl=https://www.yourdomain.com/success
wallettype=WCP                          
RESPONSE
                        
status=REDIRECT
redirecturl=https://r3.girogate.de/ti/dumbdummy?tx=2186661658&rs=60fJNpX4ci39JUDCqb0L7nv8e6e3ezZW&cs=04f3de9b4c5b9727aa42a3eeb3bf071fad6936f97386eaf5d79a4a0dbe9fa10a
txid=983037275
userid=6534498859   
POST Request - Capture
Account Parameters
request
required
Fixed Value: preauthorisation/authorization
mid
required
your merchant ID, 5-digit numeric
aid
required
your subaccount ID, 5-digit numeric
portalId
required
your Portal ID, 7-digit numeric
key
required
your key value, alpha-numeric
common Parameters
txid
required
Format NUMERIC(9..12)

The txid specifies the payment process within the PAYONE platform
sequencenumber
optional
Format NUMERIC(1..3)
Permitted values 0..127

Sequence number for this transaction within the payment process (1..n), e.g. PreAuthorization: 0, 1. Capture: 1, 2. Capture: 2

Required for multi partial capture (starting with the 2nd capture)
amount
required
Format NUMERIC(1..10)
Permitted values max. +/- 19 999 999 99

Specifies the total gross amount of a payment transaction.

Value is given in smallest currency unit, e.g. Cent of Euro; Pence of Pound sterling; Öre of Swedish krona.

The amount must be less than or equal to the amount of the corresponding booking.
currency
required
Fixed Value EUR
narrative_text
optional
Format CHAR(1..81)

Dynamic text element on account statements (3 lines with 27 characters each) and credit card statements.
Response Parameters
Permitted Values
APPROVED
PENDING
ERROR
Response Parameter (approved)
Format LIST
Value Comment
yes

Settlement of outstanding balances has been carried out.
no

Settlement of outstanding balances has not been carried out.

Provides information about whether a settlement of balances has been carried out.
Response parameters (pending)
Format NUMERIC(9..12)

The txid specifies the payment process within the PAYONE platform
Format NUMERIC(6..12)

PAYONE User ID, defined by PAYONE
Response parameters (error)
Format NUMERIC(1..6)

In case of error the PAYONE Platform returns an error code for your internal usage.
Format CHAR(1..1024)

In case of error the PAYONE Platform returns an error message for your internal usage.

 
Host: api.pay1.de
Content-Type: application/x-www-form-urlencoded
Payload

mid=23456
portalid=12345123
key=abcdefghijklmn123456789
api_version=3.10
mode=test
request=capture
encoding=UTF-8
txid=345678901
amount=300
currency=EUR
RESPONSE

status=APPROVED
txid=345678901
settleaccount=no                    
POST Request - Debit
Account Parameters
request
required
Fixed Value: preauthorisation/authorization
mid
required
your merchant ID, 5-digit numeric
aid
required
your subaccount ID, 5-digit numeric
portalId
required
your Portal ID, 7-digit numeric
key
required
your key value, alpha-numeric
Common Parameters
txid
required
Format NUMERIC(9..12)

The txid specifies the payment process within the PAYONE platform
sequencenumber
required
Format NUMERIC(1..3)

Permitted values 0..127

Sequence number for this transaction within the payment process (1..n), e.g. PreAuthorization: 0, 1. Capture: 1, 2. Capture: 2

Required for multi partial capture (starting with the 2nd capture)
amount
required
Format NUMERIC(1..10)
Permitted values max. +/- 19 999 999 99

Specifies the total gross amount of a payment transaction.

Value is given in smallest currency unit, e.g. Cent of Euro; Pence of Pound sterling; Öre of Swedish krona.

The amount must be less than or equal to the amount of the corresponding booking.
currency
required
Fixed Value EUR
narrative_text
optional
Format CHAR(1..81)

Dynamic text element on account statements (3 lines with 27 characters each) and credit card statements.
clearingtype
optional
Fixed Value wlt
use_customerdata
optional
Format LIST
Value Comment
yes

Uses current account details from debtor's master data (default)
no

Uses the last known account details in the payment process

Use account details from debtor's master data
transaction_param
optional
Format CHAR(1..50)
Permitted Symbols [0-9][A-Z][a-z][.-_/]

Optional parameter for merchant information (per payment request)
Response Parameters
status
Permitted Values
APPROVED
ERROR
Response Parameter (approved)
txid
Format NUMERIC(9..12)

The txid specifies the payment process within the PAYONE platform
settleaccount
Format LIST 
Value Comment
yes

Settlement of outstanding balances has been carried out.
no

Settlement of outstanding balances has not been carried out.

Provides information about whether a settlement of balances has been carried out.
Response Parameter (error)
errorcode
Format NUMERIC(1..6)

In case of error the PAYONE Platform returns an error code for your internal usage.
errormessage
Format CHAR(1..1024)

In case of error the PAYONE Platform returns an error message for your internal usage.
customermessage
Format CHAR(1..1024)

The customermessage is returned to your system in order to be displayed to the customer.

(Language selection is based on the end customer's language, parameter "language")

 
Host: api.pay1.de
Content-Type: application/x-www-form-urlencoded
Payload
                    
mid=23456
portalid=12345123
key=abcdefghijklmn123456789
api_version=3.10
mode=test
request=capture
encoding=UTF-8
txid=345678901
sequencenumber=1
amount=1000
currency=EUR
RESPONSE

status=APPROVED
txid=345678901
settleaccount=no

Specials

Partial Captures are supported but the account of the customer will be debit with the Preauthorization
Reversal is not supported

Sequence Diagrams

Sale

Order & Delivery

Returns