txn.Begin

This method is supported by Operations starting from version 2.6.3.

This method begins the transaction. Use the txn.Commit method to commit the transaction or use the txn.Rollback method to rollback the transaction.

The method has the following input parameters:

Name	Type	Short Description
`[txn_id]`	string	Transaction ID. This is optional parameter. If it is omitted, parameter is generated by Operations.
`[timeout]`	int	Defines transaction timeout (in seconds). This is optional parameter. Timeout is unlimited by default.
`[request_id]`	string	Request ID. It is used to track the overall status of tasks scheduled by the transaction, if specified. Use the pem.getRequestStatus method to obtain the overall status of tasks scheduled after transaction commit.

The method has the following output parameters:

Name	Type	Short Description
`txn_id`	string	Transaction ID.

Important: If you want to call this method with no parameters specified, you should do the call with an empty parameters structure, like in the example below:

<?xml version='1.0'?>
<methodCall>
	<methodName>txn.Begin</methodName>

   <params>
	<param>
	    <value>
		<struct>
		</struct>
	    </value>
	</param>
   </params>
</methodCall>

Starting from version 7.0 of CloudBlue Commerce, the parameters structure is mandatory for this method call. Omitting it will result in error.