Simple Blockchain in C++ using OpenSSL

This is a basic implementation of a blockchain system written in C++. It uses SHA-256 hashing via OpenSSL to simulate block creation and proof-of-work mining.

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Features

• Block structure with:
  • Index
  • Timestamp
  • Previous hash
  • Data (transaction info)
  • Nonce
  • Current hash
• SHA-256 hashing using OpenSSL
• Proof-of-Work mining with adjustable difficulty
• Genesis block creation
• Simple linear blockchain with data immutability

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Dependencies

• C++11 or later
• OpenSSL (for SHA-256)

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Compilation

To compile the code, ensure OpenSSL is installed, then use:

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

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Note

Mining time may vary based on the system and difficulty level.

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