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Simple C++ Blockchain

This project is a basic implementation of a blockchain in C++, demonstrating core blockchain principles such as data immutability, chaining via cryptographic hashes, and timestamping using SHA-256 (via OpenSSL).

Features

Creates a blockchain starting with a genesis block.
Each block contains:
- An index
- Timestamp
- Data
- Previous block's hash
- Its own current hash
SHA-256 hashing is performed using OpenSSL.
Outputs the entire blockchain to the console.

Requirements

C++ compiler (e.g., g++, clang++)
OpenSSL library installed
Windows users: Ensure MinGW/MSYS2 is configured with OpenSSL support

How to Build

Windows (MSYS2 example):

g++ blockchain.cpp -o blockchain -lssl -lcrypto