A lightweight blockchain core written in Rust.
Designed to demonstrate blockchain fundamentals in a clear, hands-on way.

Note: This is just a very lightweight demo of the full project.
We'll keep improving it over time, and contributions are always welcome — they might even lead to some exciting opportunities!

Key concepts explored:

• Blocks and Proof-of-Work (PoW) mining
• Merkle trees for transaction integrity
• Wallets with public/private keys (Ed25519)
• Signed transactions
• Full chain validation

• Index, timestamp, previous hash
• Proof-of-Work difficulty & nonce
• Merkle root of transactions

• Adjustable difficulty
• Mining loop that finds a hash target beginning with 0000...
• Block hash includes:
  • index
  • timestamp
  • merkle root
  • previous hash
  • nonce
  • difficulty

• Multiple transactions per block
• Includes sender, recipient, amount
• Signed using Ed25519 private keys
• Signature verification included

• Generate public/private keypairs
• SHA-256–based address creation
• Sign and verify transaction messages

• Rust (stable)

# Clone the repository
git clone https://github.com/stunkki/arcnova-chain.git
cd arcnova-chain

# Build and run
cargo run --release

ArcNova Chain includes build metadata in the binary, so you can see for example the **Git commit SHA** and **build timestamp**.