Blockchain

An interface for interacting with a blockchain.

Reference implementation

Documentation

For more in-depth details, please refer to the full documentation.

If you encounter any issues or have questions that are not addressed in the documentation, feel free to submit an issue.

Examples

Explore the capabilities of this blockchain implementation through a set of examples:

• CLI for interacting with the blockchain: see more
• API for interacting with the blockchain: see more

Usage

use blockchain::{ BlockchainError, ChainBuilder };

fn main() -> Result<(), BlockchainError> {
    // Initialise a new blockchain
    let mut chain = match ChainBuilder::default()
        .difficulty(2.0)
        .reward(100.0)
        .fee(0.01)
        .build()
    {
        Ok(chain) => chain,
        Err(e) => return Err(BlockchainError::InvalidConfiguration),
    };

    let sender = chain.create_wallet("sender@mail.com");
    let receiver = chain.create_wallet("receiver@mail.com");

    // Add a transaction
    chain.add_transaction(sender, receiver, 1.25)?;

    // Get a transaction
    let transaction = chain.get_transaction("6e8c5dc01145016e5a979683ba7e13bafaf85e765490aa33c0bba1f41cf581ed")?;

    println!("📦 Transaction: {:?}", transaction);

    Ok(())
}

Features

• new(difficulty, reward, fee): Initialize a new blockchain with the specified parameters.
• get_transactions(page, size): Get a list of current transactions in the blockchain using pagination details.
• get_transaction(hash): Get a transaction by its hash.
• add_transaction(from, to, amount): Add a new transaction to the blockchain.
• validate_transaction(from, amount): Validate a new transaction to the blockchain.
• create_wallet(email): Create a new wallet with a unique email and an initial balance.
• get_wallet_balance(address): Get a wallet's balance based on its address.
• get_wallet_transactions(address, page, size): Get a wallet's transaction history based on its address and using pagination details.
• get_last_hash(): Get the hash of the last block in the blockchain.
• update_difficulty(difficulty): Update the mining difficulty of the blockchain.
• update_reward(reward): Update the block reward.
• update_fee(fee): Update the transaction fee.
• generate_new_block(): Generate a new block and append it to the blockchain.
• get_merkle(transactions): Calculate the Merkle root hash for a list of transactions.
• proof_of_work(header): Perform the proof-of-work process to mine a block.
• hash(item): Calculate the SHA-256 hash of a serializable item.

Safety

This crate uses #![forbid(unsafe_code)] to ensure everything is implemented in 100% safe Rust.

Contributing

Contributions from the community are always welcome! Here are some ways you can contribute:

Reporting Bugs

If you encounter any bugs, please submit an issue with detailed information about the problem and steps to reproduce it.

Feature Requests

If you have ideas for new features, feel free to submit an issue with a detailed description of the feature and its potential use cases.

Build

To build the project, run:

cargo build

Test

To run the tests, use:

cargo test

Lint

Run clippy to lint the code:

cargo clippy --all-targets --all-features --no-deps -- -D warnings

Format

Run rustfmt to format the code:

cargo fmt

Documentation

Generate documentation in HTML format:

cargo doc --open