Block Structure

Each block in our implementation contains:

• Index - Position in the chain
• Timestamp - When the block was created
• Transactions - Array of transaction data (max 10 per block)
• Previous Hash - Hash of the previous block
• Hash - Current block's hash using SHA256
• Nonce - Used for mining
• Fee - Transaction fee for the block

Mining Process

Our blockchain uses a proof-of-work consensus mechanism with a difficulty-based mining system. Blocks are mined when:

• 10 transactions are pending
• Manual mining is triggered
• The target hash must start with a specific number of zeros based on difficulty

Transaction System

The transaction system includes:

• Dynamic fee calculation based on network load
• Double-spending prevention
• Balance validation before transaction execution
• Automatic block creation when transaction limit is reached

Security Features

Security is ensured through:

• SHA256 hashing for block integrity
• Chain validation checking previous hashes
• Transaction verification system
• Immutable block structure

Installation

Download the repository from GitHub

Install the blockchain implementation using npm:

1npm install
2npm run dev

Dependencies

• Next.js 14
• shadcn/ui
• Typescript
• crypto-js
• react-copy-to-clipboard
• hamburger-react

Start coding!

Create the first file, main.ts.