Crate halo2_gadgets
source ·Expand description
This crate provides various common gadgets and chips for use with halo2_proofs
.
Gadgets
Gadgets are an abstraction for writing reusable and interoperable circuit logic. They do not create any circuit constraints or assignments themselves, instead interacting with the circuit through a defined “instruction set”. A circuit developer uses gadgets by instantiating them with a particular choice of chip.
Chips
Chips implement the low-level circuit constraints. The same instructions may be implemented by multiple chips, enabling different performance trade-offs to be made. Chips can be highly optimised by their developers, as long as they conform to the defined instructions.
Modules
- Elliptic curve operations.
- The Poseidon algebraic hash function.
- sha256
unstable-sha256-gadget
The SHA-256 hash function. - The Sinsemilla hash function.
- Utility gadgets.