harkal / severance

Severance is a privacy contract for EOS/Antelope powered blockchains that was build to prove the implementation feasibility of a zkSNARKs system running entirely on-chain, written in C++.

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Severance Smart Contract

Severance is a privacy contract for EOS powered blockchains that was build to prove the implementation feasibility of a zkSNARKs system running entirely on-chain, writen in C++.

The system implements zero knownledge proofs verifier utilizing zkSNARKS to provide anonymization services to any token on EOS/Antelope blockchains. In this repo you can find all the verifier code along with specific circuits for the token implementation.

The code implements the PLONK protocol, that requires no special trusted setup. This is the main reason that it was selected over the more simple and less CPU intensive Groth16 that requires a separate trusted setup for each circuit.

The contract was compiled with cdt-4.0.0-1 and is deployed at pboxpboxpbox on the EOS mainnet.

Table of Contents

Usage

You can use the code in parts or as a whole according to the license agreement below.

Contributing

Create PRs on this repository

License

Copyright (c) 2023 Harry Kalogirou

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

About

Severance is a privacy contract for EOS/Antelope powered blockchains that was build to prove the implementation feasibility of a zkSNARKs system running entirely on-chain, written in C++.


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