What is sample error code of payload in jwt in case of payment error?

Example of payload:

{ 
"result": "declined", 
"aud": "a_b68ihhBlqR", 
"iss": "paypay.ne.jp", 
"exp": 1648705655, 
"nonce": "string", 
"referenceId": "string"
} 

parameter for ”result” will be either "declined" or "bad_request".