First Cryptocurrency

This project is implemented to explore the basic concept of blockchain and cryptocurrency.I have created the 'needcoin' cryptocurrency using blockchain. It is very basic implementation where I explore the concept of :

1. Blockchain

2. Transactions

3. Consensus

4. Proof of work

5. Decentralized the app

Project cointains 4 files that needs to be run as python program , it will run as a flask application on port 5000,5001,5002,5003

1. User can call follwoing url to connect the nodes to the blockchain network

Request Url : http://127.0.0.1:5003/connect_node

Request Type : POST

Request Example: { "nodes": ["http://127.0.0.1:5000", "http://127.0.0.1:5001", "http://127.0.0.1:5002", "http://127.0.0.1:5003"]

}

2. User can get the existing blockchain on the node through the url:

node_port :[5000,5001,5002,5003]

Request Url : http://127.0.0.1:{{node_port}}/get_chain

Request Type : GET

3)User can apply the consensus on the node by hitting the following url:

node_port :[5000,5001,5002,5003]

Request Url : http://127.0.0.1:{{node}}/replace_chain

Request Type : GET

4. User can add the transaction by hitting the url on any node :

Request Url : http://127.0.0.1:{{node_port}}/add_transaction

Request Type : POST

Request Example: { "sender": "Mr A", "receiver": "Mr B", "amount": "10" }

5. User can mine the block by hitting the url:

Request Url : http://127.0.0.1:{{node_port}}/mine_block

Request Type : POST