> ## Documentation Index
> Fetch the complete documentation index at: https://tonutils.ness.uz/llms.txt
> Use this file to discover all available pages before exploring further.

# Use FunC Hash Functions

> Compute cell, slice, and string hashes matching the FunC stdlib functions.

The `ton_core` package provides Python equivalents of the FunC stdlib hash functions `cell_hash`, `slice_hash`, and `string_hash`. Use them to reproduce on-chain hash computations off-chain, for example when signing or verifying data structured as cells.

## cell\_hash

Calculates the representation hash of the given cell `c` and returns it as a 256-bit unsigned integer `x`. This function is handy for signing and verifying signatures of arbitrary entities structured as a tree of cells.

```python theme={"theme":{"light":"github-light-default","dark":"dark-plus"}}
from ton_core import begin_cell, cell_hash


def main() -> None:
    c = begin_cell().store_string("ness").end_cell()
    x = cell_hash(c)
    print(x)


if __name__ == "__main__":
    main()
```

## slice\_hash

Computes the hash of the given slice `s` and returns it as a 256-bit unsigned integer `x`. The result is equivalent to creating a standard cell containing only the data and references from `s` and then computing its hash using `cell_hash`.

```python theme={"theme":{"light":"github-light-default","dark":"dark-plus"}}
from ton_core import begin_cell, slice_hash


def main() -> None:
    s = begin_cell().store_string("ness").to_slice()
    x = slice_hash(s)
    print(x)


if __name__ == "__main__":
    main()
```

## string\_hash

Calculates the SHA-256 hash of the UTF-8 bytes of the given string `s` and returns it as a 256-bit unsigned integer `x`.

```python theme={"theme":{"light":"github-light-default","dark":"dark-plus"}}
from ton_core import string_hash


def main() -> None:
    s = "ness"
    x = string_hash(s)
    print(x)


if __name__ == "__main__":
    main()
```

These helpers are used by [Get NFT Item Address](/how-to/get-nft-item-address) to derive item indexes for TON DNS domains and Telemint tokens.