So, let's talk about The chain. The chain its a npm package made for anyone interested to build a Node.JS Blockchain App.
How it started?
Some months ago, i've been looking for a blockchain package, something that can help me build a blockchain based social media.
So i have been searching the hole npm for one, that can create a simple blockchain database in less then 5 minutes, which can create new block at a custom time interval, and also provide a simple API to make my life easier.
Why The Chain instead of a simple database
The Chain its not only a sqlite3 database with some default table, The Chain its a package that comes with ways that must help the developer reduce the time to build his awesome blockchain application.
- Easy to integrate to existing apps
- A very customizable chain
- Custom block time
- Block verify function
- Local database
- Node system - this will let you sync the chain between multiple nodes
- Multiple extract data features
- Block confirmation system
- SocketIO API
The Chain requires Node.js v10 (only tested) to run.
Install The Chain...
$ npm install thechain --save
A simple demo
const Chain = require("thechain"); const blockchain = new Chain(path, port, blockTime); // or new Chain() for a fast blockchain const block_one = blockchain.getBlock(1); console.log(block_one); // this will print the genesis block
const path = "./chain/chain.db3"; const port = 4444; const blocktime = 60000; // 1 minute blocktime in ms
Verify the Chain
blockchain.verifyChain(); // No return
This method will be initially called to check every block, you can use it whenever you want, but warning, this method will stop your script until every block is checked.
Create new Block (WARNING! Better to set a block time and never use this method!)
blockchain.createNewBlock(); // No return
This method will create a new block when it is called, the block data will be the data contained in the data object at the block time.
const Object = ["test1", "test2"]; blockchain.push(Object); // No return
This method will push data into the block, and the block will be generated with the pushed data.
Get last 100 blocks
const last100blocks = blockchain.getLast100(); console.log(last100blocks);
This method will return the last 100 blocks.
Get x block
const blockNumber = 2; // Block number id const block = blockchain.getBlock(blockNumber); console.log(block); // This will print the block data
This method will return the block with x number.
Want to contribute? Great! Start by telling us your wishes!
The chain is licensed as MIT
Free Blockchain Software, DAM Yeah!
Top comments (4)
Hi Gabriel, I am on a new project that will use block chain and I would like to start using your node package. May be we can have a chat ? pmh.ghislain arobase gmail etc...
Of course, you can find me on Discord: Gabi#6896
Pierre#2055 I requested your friendship