# Payment of arrears

WeChat background to the owner to notify the user payment success (payment failure without notification).

# 1, request parameters

Parameter Name	type	Required	Remarks
appid	string	And	Mini Programs appid
mch_id	string	And	Payment Merchant Number
nuncio_st	string	And	Random string
encrypted_data	string	And	Using AESCBCPKCS7PADDING
iv	string	And	IV for decryption(base64)
sign	string	And	1Signature of field 5

encrypted_Data decryption data

Parameter Name	type	Required	Remarks
out_user_id	string	And	The owner of the background of the user's identity, set the registration callback interface exists
openid	string	And	User openid
bank_type	string	And	Payment type, using string type bank identifier
total_fee	int	And	Payment of expenses
transaction_id	string	And	WeChat Payment Voucher
time_end	string	And	Format for yyyy MMddHHmmss, such as December 25, 2009 9: 10: 10 seconds that is 20091225091010
repay_No	string	And	Arrearage bill number
order_No	array	And	The train code number associated with this bill number (there is a case of paying more than one bill), the content of each item is string
order	array	And	Details of the Ride Code Number associated with this Arrears Ticket Number

Where each item of order has the following content

Parameter Name	type	Required	Remarks
order_No	string	And	Bus Code Single
attach	string	And	Additional information uploaded without secret withholding
base64_qrcode	string	And	Bus code information after base64
out_order_No	string	And	External single number

# 2. Return parameters

Parameter Name	type	Required	Remarks
Errcode	int	And	0 for success
errmsg	string	N	Error message
nuncio_st	string	And	Unaltered bring back

# 3. Examples

Request:

{"appid":"test","mch_id":"123456","nonce_str":"abcdefg","encrypted_data":"jfiwajeofjiefef","iv":"afweifwefe"}

encrypted_The data is decrypted as:

{
    "out_user_id":"xxx", 
    "openid":"1234",
    "bank_type":"LQT",
    "total_fee":123,
    "transaction_id":"12312312",
    "time_end":"2020030319551111",
    "repay_no":"2020202202020",
    "order_no":[
        "123",
        "456"]
}

Return:

{"errcode":0,"nonce_str":"abcdefg","encrypted_data":"jfiwajeofjiefef","iv":"afweifwefe"}