Time-driven triggers scope in Google Script - google-apps-script

Question

UPD:
I have a published application as Spreadsheets addon and a few spreadsheets, that use this addon and execute time driven trigger:
ScriptApp.newTrigger("myFunction")
.timeBased()
.everyHours(1)
.create();
All works fine, but I'm a little confused, in what scope does this trigger work?
Since this is a published addon, the script is one and the time driven function is also one, right? As Diego said: "It works with the user scopes of the user who initiated the trigger". Okay, but what about spreadsheets?
I need to write (if trigger sees only this spreadsheet):
function myFunction(){
var ss = SpreadsheetApp.getActive();
}
Or (if it runs without binding to a specific spreadsheet):
function myFunction(){
var ss = SpreadsheetApp.openById('<some id>');
}
In other words, when I set the trigger, do I set it only for the current document or for all?
Thanks!

Answer 1

It works with the user scopes of the user who initiated the trigger. Here's how you can check:
Create a User property value i and set it to zero
In a new function, get the user property i, write it to a sheet, increment i and save it back to the property.
Create a trigger so that function runs every minute.
View the spreadsheet as a different user.
As the different user, repeat steps 1 & 2 to see that now i has started again from zero, but the 1-minute trigger is still iterating the original i value (because the different user can't access the first user's properties).
Here's the code:
function getAndPrintUserProperty() {
var userProperties = PropertiesService.getUserProperties();
var i = userProperties.getProperty("i");
i++;
SpreadsheetApp.getActive().getSheetByName("Sheet1").appendRow([i]);
userProperties.setProperty("i", i);
}
function addUserProperty() {
PropertiesService.getUserProperties().setProperty("i", 0);
}