README.md

Open Vote Network using zk-SNARKs

This is the proof of concept of our paper "Dispute-free Scalable Open Vote Network using zk-SNARKs"

Installation

1. Install Nodejs
2. Install Circom 2.0
3. Install Truffle Framework: npm install -g truffle
4. Install Ganache-cli: npm install -g ganache-cli
5. Clone this repository and change directory to its path
6. Install the required packages npm i

Execution

• cd build

• Run ./setup.sh -d [DESIGN_TO_BE_USED] -n [NUMBER_of_VOTERS] where [DESIGN_TO_BE_USED] could be:

  • original: Our original proposed design
  • sha256: The first enhancement using Sha256
  • progressiveSha256: The second enhancement using Sha256
  • progressivePoseidon: The second enhancement using Poseidon

  For example ./setup.sh -d "original" -n 3

• Check the test code in the file test/completeTest.js

• Run the local Ethereum node: ganache-cli -l 30e6 -a [[NUMBER_of_VOTERS + 2]]

• Run the command truffle test to view the result and the gas cost of each transaction

Notes

• You may need to update the variable powersOfTau in build/setup.sh based on the number of constraints generated by the circuits.
• You can find the suitable powerOfTau in https://github.com/iden3/snarkjs#7-prepare-phase-2(https://github.com/iden3/snarkjs#7-prepare-phase-2)