Learn Blockchain Programming with JavaScript

Creating the proofOfWork method

Let's build out the proofOfWork method, which we discussed in the preceding section:

1. After the hashBlock method, define the proofOfWork method as follows: 

Blockchain.prototype.proofOfWork = function() {}

2. This method takes in two parameters: previousBlockHash and currentBlockData: 

Blockchain.prototype.proofOfWork = function( previousBlockHash, currentBlockData) { }

3. The first thing that we want to do inside of our method is define a nonce:

Blockchain.prototype.proofOfWork = function( previousBlockHash, currentBlockData) {     let nonce = 0;}

4. Next, we want to hash all of our data for the first time, so type in the following highlighted line of code: 

Blockchain.prototype.proofOfWork = function( previousBlockHash, ...