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Introduction

This repository contrain Assessment Submission of task given by HogoByte.

Blockchain Ledger

This is a simple implementation of a blockchain ledger in C++. It allows you to add transactions, create blocks, validate the ledger, and print the ledger.

Prerequisites

To compile and run this code, you need to have the following installed on your system:

  • C++ compiler (supporting C++11 or later)
  • OpenSSL library

Compilation

To compile the code, follow these steps:

  1. Clone the repository or download the source code files.
  2. Open a terminal or command prompt.
  3. Navigate to the directory where the source code files are located.
  4. Run the following command to compile the code:
  • g++ blockchain.cpp -o program -lssl -lcrypto (This command uses the g++ compiler, sets the C++ version to C++11, and links against the OpenSSL library.)

Execution

  1. Open a terminal or command prompt.
  2. If there are no compilation errors, an executable file named program will be generated in the same directory. Navigate to the directory where the program executable is located.
    • ./program

Usage

Here's a brief description of the available operations:

  1. Add Transaction: Allows you to add a transaction to the transaction pool.
  2. Add Block: Creates a new block with the transactions in the transaction pool and adds it to the blockchain.
  3. Validate Ledger: Checks the integrity and validity of the blockchain.
  4. Print Ledger: Displays the entire blockchain with block details and transactions.
  5. Exit: Quits the program.

Example

Starting Blockchain Ledger...

Enter a number to perform an operation: 1: Add Transaction 2: Add Block 3: Validate Ledger 4: Print Ledger 5: Exit

1

Enter Transaction: Abhishek to Rajat, 50 INR Transaction Successfully added..

Enter a number to perform an operation: 1: Add Transaction 2: Add Block 3: Validate Ledger 4: Print Ledger 5: Exit

1

Enter Transaction: Abhishek to Swapnil, 40 INR Transaction Successfully added..

Enter a number to perform an operation: 1: Add Transaction 2: Add Block 3: Validate Ledger 4: Print Ledger 5: Exit

2

Block successfully added to Blockchain...

Enter a number to perform an operation: 1: Add Transaction 2: Add Block 3: Validate Ledger 4: Print Ledger 5: Exit

4

Block Index: 1 Block Hash: 2f64366f6d4433eaf48293313f1f82668afcee78f5f0394042dda4327a20cc8e Previous Hash: e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855 Transactions:

  • Abhishek to Swapnil, 40 INR
  • Abhishek to Rajat, 50 INR

Block Index: 0 Block Hash: e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855 Previous Hash: Transactions:

Enter a number to perform an operation: 1: Add Transaction 2: Add Block 3: Validate Ledger 4: Print Ledger 5: Exit

3

Blockchain is valid.

Enter a number to perform an operation: 1: Add Transaction 2: Add Block 3: Validate Ledger 4: Print Ledger 5: Exit