> For the complete documentation index, see [llms.txt](https://gl-docs.gitbook.io/zkpass/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://gl-docs.gitbook.io/zkpass/zkpass-developers-guide/api-reference/typescript/functions.md).

# Functions

- [Functions: ffiHelper](https://gl-docs.gitbook.io/zkpass/zkpass-developers-guide/api-reference/typescript/functions/functions-ffihelper.md): Helper functions for transforming data into FFI-compatible format
- [Functions: jwtHelper](https://gl-docs.gitbook.io/zkpass/zkpass-developers-guide/api-reference/typescript/functions/functions-jwthelper.md): Helper functions for extracting and validating JWT payloads
- [Functions: publicKeyOptionUtils](https://gl-docs.gitbook.io/zkpass/zkpass-developers-guide/api-reference/typescript/functions/functions-publickeyoptionutils.md): A collection of utility functions for converting between PublicKey and KeysetEndpoint