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Blockchain Task with JavaScript Class

Task You have three parameters, two arrays representing initialBalances and transactions and a third integer representing the blockSize. Create a blockchain that includes all valid pending transactions in the order in which they are given. Provide functionality to get the balance of a specific account on the blockchain.

Interface

  1. init(initialBalances, transactions, blockSize) => A function that initializes the blockchain.
  2. getAccountBalance(accountIndex) => returns the account balance of a specific account.

Activate Node REPL

node

Initialize Constructor

const Blockchain = require('./blockchain');

Instantiate Object

const blockchain = new Blockchain();

Initialize Object

blockchain.init(balances, transactions, blockSize);

Retrieve account balance

blockchain.getAccountBalance(index);

Run Test

npm test ./blockchain.test.js