业务对象

Field	Type	Desc
refund_id	string	Refund ID
trade_id	string	Trade ID
currency	string	Transaction currency corresponding to the amount, encoded according to ISO4217
callback_url	string	Webhook notification callback URL
reason	string	Refund reason
refund_amount	string	Refund amount
refund_status	string	Refund status pending: Processing failed: Refund failed succeeded: Refund successful
metadata	map[string]string	A set of key-value pairs that can be attached to an object, allowing you to store additional information in a structured format.
failure_reason	FailureReason	Refund failure reason
ref_arn	string	Refund credential returned by the issuing bank
finished_at	string	Refund completion time

FailureReason

Field	Type	Desc
code	string	System returned transaction return code
message	string	System returned transaction return description
channel_code	string	Channel return code
channel_message	string	Channel return description
raw_error	string	Raw error information