Is there a way to access that balance ID programatically? Right now, it is a magic string and it isn't clear to me how I would get access to it in my program. P

Is there a way to access that balance ID programatically? Right now, it is a magic string and it isn't clear to me how I would get access to it in my program. Perhaps from a return value on decimals.transactions.create? Also, shouldn't decimals.transactions.create be asynchronous?