Blockchain

Javascript based blockchain

Prerequisite for blockchain project

1. NodeJS should be installed in the system
2. Should run following command to install the project dependencies

npm i

Command to start nodes

npm run node_1

or

nodemon --watch dev -js dev/networkNode.js 3001 http://localhost:3001

check package.json for complete details

APIs

Blockchain

Fetches complete Blockchain.

URL : http://localhost:3001/blockchain

Method : GET

Data

{
    "chain": [
        {
            "index": 1,
            "timestamp": <number>,
            "transactions": [],
            "nonce": 100,
            "hash": "0",
            "previousBlockHash": "0"
        },
        ...
    ],
    "pendingTransactions": [
    {
     "amount": <number>,
            "sender": <string>,
            "recipient": <string>,
            "transactionId": <string>
    },
    ...
    ],
    "currentNodeUrl": "http://localhost:3001",
    "networkNodes": 
    [
    <string>,
    ...
    ]
}

Transaction

To create and broadcast new Transactions.

URL : http://localhost:3001/transaction/broadcast

Method : POST

Data constraints

{
	"amount": <number>,
	"sender": <string>,
	"recipient": <string>
}

Mine

To mine a new block.

URL : http://localhost:3001/mine

Method : GET

Data

{
    "note": "New block mined & broadcast successfully",
    "block": {
       <block>
    }
}

Register Node

To register and broadcast new node URL.

URL : http://localhost:3001/register-and-broadcast-node

Method : POST

Data constraints

{
	"newNodeUrl":<string>
}

Consensus

To register and broadcast new node URL.

URL : http://localhost:3001/consensus

Method : GET

Data

{
    "note": "This chain has been replaced.",
    "chain": [
        <blockchain>
    ]
}