# Fixed size 256-bit math library
This is a library specialized at replacing the `big.Int` library for math based on 256-bit types.
original repository: [uint256](<https://github.com/holiman/uint256/tree/master>)
Functions
not supported for pure packages by the node (vm/qfuncs)
Signatures reconstructed verbatim from vm/qfuncs — interface params keep their inline definitions.