Google Sheet / Google Apps Script

Job ID: 37206775

Budget: $30 – $250 USD

I am looking for a freelancer who is experienced in Google Sheets and Google Scripts to help me with an advanced automation and custom functions task. The ideal candidate should have the following skills and experience:

I need to do the following
Requirements:
1/ Have a "read" spreadsheet using a Google Apps script to encode UserEmailAddress&CellContent&TimeStamp, where UserEmailAddress is the email of the Google User opening the spreadsheet, and cell content the content of A1 in the spreadsheet, and TimeStamp can be the TimeStamp of when the user opened the Sheet;
2/ I need a spreadsheet where I can reverse the process and see UserEmailAddress&CellContent&TimeStamp uncoded;

3/ In the first point (1/) I need a function to be used that cannot be seen by the user of the spreadsheet so that they cannot reverse engineer it.

4/ The code must be commented in a clear way

Budget: $150
Deadline to get the project done: 21/09/2023 tomorrow
Related categories: Google Sheets Google Apps Scripts