RustyChain

This project is a simple educational blockchain implementation in Rust, designed for demonstration purposes. It allows you to create and validate blocks with transactions, simulate Proof-of-Work mining, and persist the blockchain state to a JSON file.

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Features

• Transactions with from, to, and amount
• Proof-of-Work with adjustable difficulty
• Blockchain validation
• Persistent storage to blockchain.json (for simplicity)
• Interactive CLI for adding transactions

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How It Works

Each time the program runs:

1. It loads the blockchain from blockchain.json if it exists.
2. Prompts the user to enter transaction details.
3. Creates a new block containing the transaction.
4. Mines the block using a basic Proof-of-Work mechanism (hash must start with 0000).
5. Adds the block to the chain and saves it back to disk.

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Prerequisites

• Install Rust and Cargo

Getting Started

1. Clone the repository

2. Build the project and install dependencies

cargo build

3. Run the project

cargo run

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Example Interaction

--- New Transaction ---
From: Abdulelah
To: Sarah
Amount: 10
✅ Block added and mined.
Blockchain valid? true

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Files

• main.rs – main blockchain logic and CLI.
• blockchain.json – saved blockchain state. (Generated after first transaction)