How do I install ZoKrates and create my first zkSNARK proof?

The tutorial uses Docker to run ZoKrates, with steps like 'docker build -t zokrates' and commands such as 'compile' for programs and 'generate-proof' for proofs. Follow the exact commands in the README, but note that ZoKrates may have updated installation methods since 2018.

What are the main differences between zkSNARKs and zkSTARKs?

zkSNARKs require a trusted setup and offer smaller proof sizes, while zkSTARKs are trustless but have larger proofs. This tutorial focuses on zkSNARKs via ZoKrates, which simplifies the trusted setup but may not cover newer alternatives like zkSTARKs.

Is this tutorial still relevant for current Ethereum development?

It provides a foundational understanding, but tools like ZoKrates and Solidity versions have evolved since 2018. Check the official ZoKrates repository for updates, as some commands or best practices may have changed.

How can I reduce the gas costs of verifying zkSNARK proofs?

The tutorial notes high gas usage and suggests setting a high gas limit initially. For production, consider optimizing the circuit in ZoKrates or using layer-2 solutions, but this example doesn't cover advanced gas-saving techniques.

ZoKrates vs. circom: which is better for Ethereum zkSNARKs?

ZoKrates offers a higher-level language and integrated tooling, as shown in this tutorial, while circom provides more flexibility and is newer. ZoKrates is easier for beginners, but circom might be preferred for complex circuits or current projects.

What are the security implications of the trusted setup in zkSNARKs?

If toxic waste parameters are not properly destroyed, attackers could forge proofs. The tutorial assumes a trusted party handles this, but in practice, projects often use ceremonial setups or alternatives like zkSTARKs to mitigate risks.

A practical beginner's guide to creating, proving, and verifying zkSNARKs — Beginner's Guide to zkSNARKs

What is A practical beginner's guide to creating, proving, and verifying zkSNARKs?

zkSNARKs Example is a tutorial project that demonstrates how to implement zero-knowledge proofs on the Ethereum blockchain. It provides a practical guide for developers who want to create, prove, and verify zkSNARKs in smart contracts without needing deep cryptographic knowledge. The project uses the ZoKrates toolbox to simplify the process and includes complete code examples.

Target Audience

Ethereum developers and blockchain engineers who want to add privacy features to their smart contracts using zero-knowledge proofs. It's particularly suitable for beginners who need a practical, hands-on introduction to zkSNARKs implementation.

Value Proposition

This tutorial stands out by providing a complete, working example that abstracts away the complex mathematics of zkSNARKs. Unlike theoretical explanations, it offers copy-paste-ready code and a clear workflow that developers can immediately apply to their projects.

Overview

zkSNARKS tutorial

Use Cases

Best For

Learning zkSNARKs implementation from scratch
Adding privacy features to Ethereum smart contracts
Creating confidential transactions on blockchain
Understanding zero-knowledge proof workflows
Building trustless verification systems
Experimenting with ZoKrates toolbox

Not Ideal For

Projects requiring up-to-date, production-ready zkSNARK integrations with modern Ethereum tooling
Developers seeking in-depth theoretical explanations of cryptographic mathematics behind zero-knowledge proofs
Applications needing complex, interactive zkSNARK systems beyond basic proof-of-knowledge examples

Pros & Cons

Pros

Clear Step-by-Step Tutorial

Walks through the entire workflow from writing a ZoKrates program to deploying a verifier contract, with specific commands like 'compile' and 'export-verifier' for hands-on learning.

ZoKrates Abstraction Layer

Uses the ZoKrates toolbox to abstract complex zkSNARK mathematics, allowing developers to implement proofs without deep cryptographic knowledge, as emphasized in the 'driver's ed' philosophy.

End-to-End Code Examples

Provides complete Solidity contracts (e.g., Verifier.sol) and Python web3 scripts for verification, enabling copy-paste implementation and immediate testing.

Practical, Role-Based Workflow

Explains the process through entities like Charlie (trusted party), Alice (prover), and Bob (observer), clarifying real-world roles and making the concept accessible.

Cons

Potentially Outdated Tooling

Based on a 2018 version of ZoKrates and Ethereum, with the author noting ZoKrates is a 'WIP' and details may change, risking deprecated methods or unsupported dependencies.

Limited Application Scope

Focuses on a simple summing example and acknowledges challenges in interactive applications (e.g., games being brute-forceable), restricting utility for advanced use cases.

High Gas Costs

Verification requires state-changing transactions with high gas limits, as noted in the tutorial, making it expensive for frequent use on mainnet Ethereum.

Trusted Setup Dependency

The workflow depends on a trusted third party to generate and destroy toxic waste parameters, introducing centralization and security concerns for decentralized applications.

A practical beginner's guide to creating, proving, and verifying zkSNARKs

What is A practical beginner's guide to creating, proving, and verifying zkSNARKs?

Overview

Use Cases

Best For

Not Ideal For

Pros & Cons

Pros

Cons

Frequently Asked Questions

Related Projects

Found a gem we're missing?

A practical beginner's guide to creating, proving, and verifying zkSNARKs

What is A practical beginner's guide to creating, proving, and verifying zkSNARKs?

Overview

Use Cases

Best For

Not Ideal For

Pros & Cons

Pros

Cons

Frequently Asked Questions

Related Projects

Found a gem we're missing?