Chain Rxn - Build Your Own Blockchain

Welcome to Project 1 of Chain Rxn (BIB Summer Bootcamp)!

In this project, you’ll build a simple blockchain from scratch to understand how blocks, hashes, and chain validation work under the hood. You’re free to use any programming language you’re comfortable with (C, Python, JavaScript, etc.).

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Getting Started

Follow these steps carefully. This guide assumes no prior experience with GitHub, so take it slow and read everything.

Step 1: Fork This Repository

1. Click the Fork button at the top-right of this page.
2. A copy of this repository will be created in your own GitHub account.
3. Clone it to your local system using this command (replace your-username):

git clone https://github.com/your-username/ChainRxn-Project1

🧩 Task Overview

This project involves writing code to simulate a basic blockchain.

Requirements:

• Create a Block structure/class with the following:

  • Index (block number)
  • Timestamp
  • Data (message or transaction)
  • Previous block’s hash
  • Current block’s hash (can use a simple/fake hash)

• Create a Blockchain class or logic that:

  • Starts with a Genesis block
  • Adds new blocks
  • Validates the integrity of the chain (check for tampering)

Optional:

• Add Proof of Work or mining mechanism for added complexity.

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🚀 How to Run

If using C:

gcc blockchain.c -o blockchain
./blockchain

If using another language:

• Follow the normal run commands for that language.

• You can submit you solution in ANY PROGRAMMING LANGUAGE

• Templates have been added for Python and C.

• Add instructions in your own README.md

🚀 Pushing Changes to GitHub

After completing your implementation:

git add .
git commit -m "Completed my blockchain implementation"
git push origin main

Replace main with master if your branch is named differently.

✅ Verify your changes are visible on your GitHub repository.

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📤 Submitting Your Solution

Once ready and pushed:

1. Fill out the submission Google Form.

2. Provide your:

   • Full Name
   • Email ID
   • GitHub repo link (e.g., https://github.com/your-username/ChainRxn-Project1)

3. Click Submit.

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🕒 Deadline

Submit your solution by: 18th June' 25 (EOD)

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🏁 Final Tips

• Keep your code simple and clear.
• Focus on understanding blockchain concepts, not just coding.
• Document your code with comments or add a small README.md inside your repo.
• Try not using AI.

We look forward to seeing your first blockchain! 🚀