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Proof Generation and Submission Script

Generate unique proofs and submit them to zkVerify.

This project contains simple Multiplication examples for each supported proof type, accepting 2 numbers as inputs and returning a result.

Generated proofs are then sent to zkVerify for verification.

Pre-requisites

  1. Before you begin, ensure you have the following tools installed globally on your system:
  • snarkjs: This is a JavaScript library for generating and verifying zk-SNARK proofs.
npm install -g snarkjs
  • Rust: Ensure you have Rust and Cargo installed. If you don't have Rust installed, you can install it using the following command (change the .zshrc as required):
cd
curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
rustup self update
rustup update stable
echo 'export PATH="$HOME/.cargo/bin:$PATH"' >> ~/.zshrc
  • circom: Install circom on your machine, this is a circuit compiler for zk-SNARKs.
cd
git clone https://github.com/iden3/circom.git ~/circom
cd ~/circom
cargo build --release

Export the path:

cd
echo 'export PATH="$PATH:$HOME/circom/target/release"' >> ~/.zshrc 
source ~/.zshrc

Verify the installation:

circom --version

  1. Update the .env.testnet file values, in particular ensure you added your SEED PHRASE

  2. Get some zkVerify testnet tokens by asking in Discord

  3. View proof specific README e.g. src/risc0/README.md

Setup

  1. Install dependencies: Run the following command from the top-level directory of the project:
npm install

Types

Each proof type has a types.ts within its directory that shows the structure of the proof data and its handler for converting a proof into the required format.

Proof Specific Setup

From the root directory, run the necessary setup scripts for the proof type, e.g. the risc0 will generate the required target folder used in the risc0 handler:

./src/setup.sh risc0
./src/setup.sh groth16
./src/setup.sh fflonk
./src/setup.sh boojum

Generating and sending a single unique proof

  1. Via package.json (requires proofType arg. An optional skipWaitingForAttestationEventBoolean can be added and set to true which will not wait for the attestation emitted by zkVerify, useful if sending many proofs concurrently.) Default is false if not provided.
npm run generate:single:proof -- fflonk
  1. Run the file directly with ts-node
npx ts-node src/send-proof/index.ts <proofType> <skipWaitingForAttestationEventBoolean>

Proof Conversion - Making your proof compatible with zkVerify

The logic for converting proofs into a format accepted by zkVerify can be viewed in each of the proofs handler index.ts.

For example src/risc0/handler/index.ts

Notes

  • Ensure your .env file is set up with the required environment variables:

WEBSOCKET: The WebSocket endpoint of your Substrate node. SEED_PHRASE: The seed phrase of the account used for submitting transactions.