# Raw code

WeChat backstage requests the source data of the QR code from the business side, and the front end can generate the bus code according to the source.

# 1、 Request parameters

Parameter Name	type	Required	Remarks
appid	string	And	Mini Programs
appidmch_id	string	And	Payment Merchant Number
nuncio_st	string	And	Random string
encrypted_data	string	And	Using AESCBCPKCS7PADDING
iv	string	And	IV for decryption(After base 64)
sign	string	And	1Signature of field 5

encrypted_Data decryption data

Parameter Name	type	Required	Remarks
openid	string	And	user
idcard_id	string	And	Third Party User ID (if there is a registration link)
user_public_key	string	And	User public key in hexadecimal format, 130 bytes total

Parameter Name	type	Required	Remarks
Errcode	int	And	0 for success
errmsg	string	N	Error message
nuncio_st	string	And	Unaltered bring back
encrypted_data	string	And	Using AESCBCPKCS7PADDING

encrypted_Data decryption data

Parameter Name	type	Required	Remarks
base64_svr_data	string	And	Transportation Code Standard 115 field splicing binary stream, base64 easy to network transmission

Request:

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

encrypted_After decryption of data:

{"openid":"1234","user_public_key":"123123","card_id":"2342343"}

Returns:

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

encrypted_Data after decryption:

{"base64_svr_data":"xxafdafd"}