Blockchain

A Rust crate provides an interface for interacting with a blockchain.

Reference implementation

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.

Options

Option	Data type	Description
difficulty	f64	The initial mining difficulty level of the network.
reward	f64	The initial block reward for miners.
fee	f64	The transaction fee.

Safety

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

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 using axum: see more

Usage

use blockchain::Chain;

fn main() {
  // Initialise a new blockchain
  let mut chain = Chain::new(2, 100.0, 0.01);

  // Create a wallet for a sender
  let sender = chain.create_wallet(String::from("sender@mail.com"));
  
  // Create a wallet for a receiver
  let receiver = chain.create_wallet(String::from("receiver@mail.com"));

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

  // Get a transaction
  let transaction = chain.get_transaction(
    String::from("6e8c5dc01145016e5a979683ba7e13bafaf85e765490aa33c0bba1f41cf581ed")
  );

  match transaction {
    Some(trx) => println!("📦 Transaction: {:?}", trx),
    None => println!("❌ Transaction was not found"),
  }

  // Get all transactions
  let transactions = chain.get_transactions();
  println!("📦 Transactions: {:?}", transactions);

  // Others
}

Contributing

Build the application:

cargo build

Test the application:

cargo test

Run the application:

cargo run

Run clippy:

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

Run lint:

cargo fmt

Generate documentation in HTML format:

cargo doc --open