Get Jira Time Spent value from TimeTracker

[Gonza]

Hello,

I am creating a new field (Type --> Calculated Date/Time Field)  that get the value of Estimated that give the Time Tracker with the formula Option.

I will struggle to get the value and I can not achived.  I used this functions but it is not work for me in the formula of the field.

issue.getField("timespent").getValue();

or

getTimeTracking()

Now  I am stuck.

<!-- @@Formula:
if (issue.getField("timespent").getValue() != null {
return issue.getField("timespent").getValue();
} else {
return 0;
}
-->

I want to use variable but it is not working for me the type TimeTracking.

Also I need  to collect the timespent but it is related with this.

Can anyone help me?

Thanks in advanced.

[Gonza]

I tried to copy Time Spenf field to a custom_field in a postfuction but the system shows me an error of

Unable to copy value from field.