Blockchain

Project description:

• In this project, you will create a basic C implementation of the blockchain data structure.

The user interface of your program should look something like this:

Choose an option:
1. Add a new block to the chain
2. View the chain
3. Check chain validity
4. Search for a block
5. Mine new block

Enter your choice:

1.Specific Requirements:

R1: Create a function for generating hashes
R2: Create a Block data structure
R3: Create a Blockchain data structure
R4. Create a program that adds blocks to your blockchain
R5: Print out the blockchain (view the chain)
R6: Create an algorithm that tests the validity of the blockchain
R7: Create a function that searches the blockchain for a particular hash
R8: Implement a function to "mine" a new block

R1: Create a "Block"

Assumptions:

• All blocks hold string data
• The string data is maximum 50 characters long.

A block is composed of the following properties:

• Data you want to put in the block
• Hash of the current block

The parameters for hashing is:

• Current block data
• Previous hash
• Current date and time

R2: Create a hash for the block

Create the algorithm for generating a hash for the current block.

The formula for hashing a block is:

String dataToHash = (hash of previous block) + (current time) + (data in the current block)

R3: Create a Block data structure

The block has the following properties:

R3: Create a Blockchain data structure

Create a blockchain data structure. see image.

Implement the chain with the data structure of your choice (array, linked list, doubly linked list, stack, queue, etc)

R4. Create a program that adds blocks to your blockchain

Write a program that adds blocks to the blockchain.

Your program should:

• Ask user what data they want to store (string data, maximum 20 characters)
• Create a new block to store the user data
• Add the block to the blockchain

R5. Print out the blockchain

Add an option to your program so the user can print out the entire blockchain.

The visual output should be something like this:
(Note: these are fake hashes)

Block 1: 192333101
Data = “Jenelle”
Previous Hash: 0

Block 2: 144000332
Data = “Peter”
Previous hash = 192333101

Block 3: 993811091
Data = “Roy”
Previous hash = 144000332

etc
etc

R6: Create an algorithm that tests the validity of the blockchain

Given a blockchain data structure, write a function to verify that every block in the chain is valid.
If the entire chain is valid, output: "Chain is valid" to the screen
Else, output the block(s) that are invalid + the reason why.

R8: Write a program to mine blocks

Program that can mine new blocks. You do not need to add data to your new blokc. Just use

(previous hash + x) ---> and solve for x

Note - this mining process might take a long time (and it may never complete, but that's okay!)