> For the complete documentation index, see [llms.txt](https://documentation.crossengage.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://documentation.crossengage.io/data-and-engagement-platform/messages/personalization/misc.-helper-functions.md).

# Misc. Helper Functions

- [Voucher Helper Function](https://documentation.crossengage.io/data-and-engagement-platform/messages/personalization/misc.-helper-functions/voucher-helper-function.md)
- [Vouchers: Use Case](https://documentation.crossengage.io/data-and-engagement-platform/messages/personalization/misc.-helper-functions/voucher-helper-function/vouchers-use-case.md)
- [Event Helper Functions](https://documentation.crossengage.io/data-and-engagement-platform/messages/personalization/misc.-helper-functions/event-helper-functions.md)
- [Opt Out Helper Functions](https://documentation.crossengage.io/data-and-engagement-platform/messages/personalization/misc.-helper-functions/opt-out-helper-functions.md)