Simple Blockchain Model Simulation

In the initial version, the full implementation of transactions is not yet complete.

This C++ code simulates a basic blockchain system with users, transactions, and mining. It uses a previously written C++ library for hash functions.

Dependencies

• iostream: Standard input/output stream.
• vector: Dynamic array container.
• ctime: Functions to work with time.
• cstdlib: C Standard General Utilities Library.
• algorithm: Provides a collection of functions for performing operations on ranges of elements.
• iomanip: Set width and formatting of output.
• sstream: Stream class to operate on strings.

Important Classes

• User: Represents a user with a name, public key, and balance.
• Transaction: Represents a transaction with a unique ID, sender, recipient, and amount.
• Block: Represents a block with transactions, the hash of the previous block, timestamp, nonce, and the block's hash.

Blockchain Operations

• printBlock: Displays information about the latest or specified block.
• mine_block: Mines a block with a specified difficulty.
• process_transactions: Updates user balances based on transactions.
• add_block_to_chain: Adds a mined block to the blockchain.
• run_simulation: Simulates a blockchain with random users and transactions.

How to Run

1. Ensure that the custom_hash.so library is in the same directory.
2. Compile and run:

g++ -o blockchain blockchain.cpp
./blockchain

Feel free to modify simulation parameters in the run_simulation function to observe different scenarios.

blockchain.run_simulation(100, 1000, 2, 3, 100000);

Code Explanation

The code includes a hash function customHash and three main classes: User, Transaction, and Block. The Blockchain class manages the blockchain operations, including mining and simulation. The main function initializes a blockchain and runs a simulation with specified parameters.

Note: Make sure to adapt the compilation and execution steps based on your specific C++ environment.