Use FunC Hash 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.

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.

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.

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 to derive item indexes for TON DNS domains and Telemint tokens.

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Use FunC Hash Functions

cell_hash

slice_hash

string_hash

​cell_hash

​slice_hash

​string_hash

cell_hash

slice_hash

string_hash