:Preventing Double Transactions Billing
For a programmer who works with token billing - it is recommended to transmit
an additional parameter in order to avoid double transactions
The name of the parameter is
The unique ID of the transaction in your system must be transferred, if we receive the same ID again the system will return - a double transaction. And will not bind the transaction.
String of up to 25 characters. (It is recommended to do an advanced runner number)
For programmers working with "thread", it is recommended to wait a few seconds for an answer and only then send a request again to prevent fast sending in parallel before processing the server, usually a 1 second client, but can take up to 7 seconds in case of transaction delays with credit card companies.
The unique ID will be valid until the system responds that a "correct response code" has been received from the credit card companies.
These answer codes include codes for >> Billing (code 0), test J2 (code 701), and confirmation J5 (code 700).