simpleblockchaingo

SimpleBlockchainGo

Go Blockchain Implementation for Education

Running the Go Blockchain Project

Follow these steps to run the Go blockchain project on your system:

1. Install Go: If you haven't already, you'll need to install the Go programming language on your system. You can download it from the official website: Go Downloads.

2. Create a Project Directory: Organize your project files by creating a directory. For example, you can create a directory named blockchain_project.

3. Create a Go File: Inside the project directory, create a Go file (e.g., main.go) and copy the entire code from the provided code snippet into this file.

4. Open a Terminal/Command Prompt: Open your terminal or command prompt.

5. Navigate to the Project Directory: Use the cd command to navigate to your project directory. For example, if you created the blockchain_project directory on your desktop, you would navigate to it like this:

   cd ~/Desktop/blockchain_project
   

6. Compile and Run run your Go blockchain project, use the following command:

   go run main.go
   

Implementation:

Block Structure

Each block is represented by a struct called Block. A block contains the following fields:

• transactions: A list of transactions stored in the block.
• prevPointer: A pointer to the previous block in the blockchain.
• prevHash: The hash of the previous block.
• currentHash: The hash of the current block.

CalculateHash Function

The CalculateHash function computes the SHA-256 hash of a block. It takes a Block as input and returns the hash as a hexadecimal string.

InsertBlock Function

The InsertBlock function adds a new block to the blockchain with the given transactions. It returns the updated head of the blockchain. The new block is linked to the previous block by setting the prevPointer and prevHash fields. The hash of the new block is calculated and set as currentHash.

ChangeBlock Function

The ChangeBlock function searches for a specific transaction within the blockchain and updates it with a new value. It iterates through blocks in reverse order, starting from the head of the blockchain. When a transaction is found and updated, the block's hash is recalculated.

ListBlocks Function

The ListBlocks function displays the contents of the blockchain. It iterates through blocks from the head to the genesis block and prints the block's hash, previous hash, and transactions.

VerifyChain Function

The VerifyChain function checks the integrity of the blockchain by comparing block hashes. It iterates through blocks from the head to the genesis block. If a block's previous hash doesn't match the calculated hash of the previous block, the blockchain is considered compromised.