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.

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Requirements

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

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How to Build

Windows (MSYS2 example):

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

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