# _get_hash_version · FT4 Rell API · Chromia Docs (concept)

> function _ get_ hash_ version(block_ header: block_header ): integer 

Source: https://docs.chromia.com/pages/ft4-rell/-f-t4-library/lib.iccf/_get_hash_version/

FUNCTION

# \_get\_hash\_version

```signature
function _get_hash_version(block_header: block_header): integer
```

[Source](https://gitlab.com/chromaway/ft4-lib/src/development/rell/src/lib/iccf/module.rell#lines-279)

[View this page on docs.chromia.com](https://docs.chromia.com/pages/ft4-rell/-f-t4%20-library/lib.iccf/_get_hash_version.html)Generated API reference, mirrored from the live docs