anychain

A blockchain data structure for Node.js! :rocket:

Quick Start (JavaScript)

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

const blockchain = new Blockchain();

const shipments = [
  {
    trackingId: 42,
    latitude: 40.758895,
    longitude: -73.985131
  }
];

blockchain.add(shipments);

Quick Start (TypeScript)

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

interface Shipment {
  trackingId: number;
  latitude: number;
  longitude: number;
}

const shipments: Shipment[] = [
  {
    trackingId: 42,
    latitude: 40.758895,
    longitude: -73.985131
  }
];

const blockchain: Blockchain<Shipment[]> = new Blockchain<Shipment[]>();

const latestBlock: Block<Shipment[]> = blockchain.add(shipments);

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,
    "parent": null,
    "data": "GENESIS",
    "time": 1522226975631,
    "hash": "2e465389daa2d20a41fcd12cb7cf2b59fbd04e72dcd5d21cb5c72c91fd83119b"
  },
  {
    "index": 1,
    "parent": "2e465389daa2d20a41fcd12cb7cf2b59fbd04e72dcd5d21cb5c72c91fd83119b",
    "data": [
      {
        "trackingId": 42,
        "latitude": 40.758895,
        "longitude": -73.985131
      }
    ],
    "time": 1522226975631,
    "hash": "9467452a7cdb8491d3b5c1cce93583bb2840e6c0b9e2612f6a915e1df207c52a"
  }
]

#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.

License

MIT