anychain

A blockchain data structure for Node.js! 🚀

Quick Start (JavaScript)

const { Blockchain } = require("@anychain/core");

const blockchain = new Blockchain();

blockchain.add({
  id: 42,
  firstName: "Elon",
  lastName: "Musk"
});

Quick Start (TypeScript)

import { Block, Blockchain } from "@anychain/core";

interface User {
  id: number;
  firstName: string;
  lastName: string;
}

const blockchain: Blockchain<User> = new Blockchain<User>();

const newBlock: Block<User> = blockchain.add({
  id: 42,
  firstName: "Elon",
  lastName: "Musk"
});

Installation

yarn add @anychain/core
# or
npm install --save @anychain/core

API

constructor(chain?: Block<T>[])

Pass an optional existing chain to the constructor.

#add(data: T): Block<T>

Adds a new block with the given data to the blockchain.

#update(chain: Block<T>[]): boolean

Overwrite the current chain with a more recent one. Returns true when the update was successful.

#toJSON(): string

Returns the following JSON for the example above:

[
  {
    "index": 0,
    "predecessor": null,
    "data": "GENESIS",
    "time": 1522053753184,
    "hash": "42eb51b086fadc504ca3f494e6332788a008c8aff7b7369d22268540e55f1854"
  },
  {
    "index": 1,
    "predecessor": "42eb51b086fadc504ca3f494e6332788a008c8aff7b7369d22268540e55f1854",
    "data": {
      "id": 42,
      "firstName": "Elon",
      "lastName": "Musk"
    },
    "time": 1522053753184,
    "hash": "45c102b6b73fcab0f1396079c94a863640d0927205b3f0803702f047155412f8"
  }
]

#getChain(): Block<T>[]

Returns the full chain as array.

#getGenesisBlock(): Block<T>

Returns the first block in the chain (genesis).

#getLatestBlock(): Block<T>

Returns the latest block in the chain.