A Guide to Building and Running snarkOS for Zero-Knowledge Applications

Jul 18, 2021 | Blockchain

Welcome to the world of snarkOS! This decentralized operating system is designed specifically for zero-knowledge applications, forming the backbone of the Aleo network. With snarkOS, you can verify transactions and store encrypted states in a publicly-verifiable way. Let’s dive into how you can build and run your own Aleo node, ensuring you meet all the requirements and troubleshoot any issues that might arise along the way!

Table of Contents

1. Overview

snarkOS is a decentralized operating system designed for zero-knowledge applications. It operates within the Aleo network, verifying transactions and securely storing encrypted states that can be publicly verified.

2. Build Guide

2.1 Requirements

Before we get started, make sure your machine meets the following **minimum** requirements to run an Aleo node:

  • OS: 64-bit architectures only (Ubuntu 22.04, macOS Sonoma or later, Windows 11 or later).
  • CPU: 64-bit architectures with at least 32 cores (64 cores preferred).
  • RAM: 32GB (64GB preferred for Provers), and 64GB (128GB preferred for Validators).
  • Storage: NVME SSD with at least 300GB for Clients, 32GB for Provers, and 2TB (4TB preferred) for Validators.
  • Network: Always-on connection with specific upload/download bandwidth requirements.

2.2 Installation

To begin, ensure your machine has Rust v1.79+ installed. You can find installation instructions here.

Next, clone the GitHub repository:

git clone --branch mainnet --single-branch https://github.com/AleoNetsnarkOS.git

Move into the snarkOS directory:

cd snarkOS

Check out the testnet release:

git checkout tags/testnet-beta

For Ubuntu users, use the helper script to install dependencies:

./build_ubuntu.sh

Lastly, install snarkOS:

cargo install --locked --path .

Ensure that ports 4130/tcp and 3030/tcp are open on your router and the OS firewall.

3. Run an Aleo Node

3.1 Run an Aleo Client

Once you’ve followed the Build Guide, you can start a client node with the following command:

./run-client.sh

3.2 Run an Aleo Prover

First, generate an Aleo account address:

snarkos account new

This will output your new Aleo account in the terminal. Make sure to save your private key and view key!

To start a proving node, run:

./run-prover.sh

Once prompted, input your private key:

Enter the Aleo Prover account private key: APrivateKey1xxxxxxxxx

4. FAQs

Here are some common issues you might encounter, along with solutions:

  • My node is unable to compile. Ensure Rust v1.66+ is installed, and try running cargo clean to resolve large errors.
  • My node is unable to connect to peers on the network. Check that ports 4130/tcp and 3030/tcp are open.
  • I can’t generate a new address. Make sure you run source ~/.bashrc and check your directory’s spelling of snarkOS.
  • How do I use the CLI to sign and verify a message?
    1. Generate an account with snarkos account new.
    2. Sign a message with snarkos account sign --raw -m Message --private-key-file=PRIVATE_KEY_FILE.
    3. Verify the signature with snarkos account verify --raw -m Message -s sign1SignatureHere -a aleo1YourAccountAddress.

5. Command Line Interface

For custom configurations, you can use the command line options. To list all options, use:

snarkos --help

6. Development Guide

6.1 Quick Start

To start multiple validators, open different terminals and run:

cargo run --release -- start --nodisplay --dev [NODE_ID] --validator

Remember to replace [NODE_ID] with a unique number (0, 1, 2, etc.). Start Clients in the same way.

6.2 Operations

Node initialization follows the pattern: cargo run --release -- start --nodisplay --dev NODE_ID --[node type]. The default type is --client if none is specified.

7. Contributors

Thanks to all contributors who help improve snarkOS!

8. License

For terms regarding contributions, please refer to the Contributors section.

Troubleshooting

If you encounter issues while building or running snarkOS, here are some troubleshooting ideas:

  • Always ensure your dependencies are correctly installed by following the steps in the installation guide.
  • If you face port issues, verify that your firewall settings allow traffic through the necessary ports.
  • If you’re getting compilation errors, double-check that your Rust version matches the required version.

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