JeChain is a proof-of-work blockchain which has smart contract supports, created using Javascript, originally used in this series on dev.to. If you are here for that, consider checking out this repo.
To know how this code work properly, you can check out the tutorial series on dev.to:
- Part 1: Creating a blockchain in 60 lines of Javascript
- Part 2: Creating a cryptocurrency - Creating transactions, mining rewards, mint and gas fee
- Part 3: Build a p2p network and release your cryptocurrency
Although created mainly as an educational project, JeChain is still being actively developed and new features are still coming in. It might even be production-ready in the future.
- Good learning material.
- Simple, easy to configure.
- Open-source
- Smart contract support.
First, be sure to have Nodejs installed on your machine.
Next, install all the needed packages:
npm install
If you haven't had your keys, goto ./utils and type node keygen, it will generate a key pair for you.
Then, if you want to start a node, open the terminal, configure it first:
# PORT
PORT=Insert your port here
# Peers to connect when startup
PEERS=Address 1, address 2, address 3
# Set your address
MY_ADDRESS=ws://your.ip.and:port
# Set your private key
PRIVATE_KEY=your key
# Assign "true" if you want to setup a mining node
ENABLE_MINING=true
# Start the node
node .The equivalent of this on Windows is set PORT=Insert your port here
You can mine a block like this:
mine();You can broadcast a transaction like this:
sendTransaction(yourTransaction);You can request for a chain and chain's info with a handy dandy function called requestChain:
requestChain("An address you trust");If you just want to set up a node that mines continously (like most people would), use loopMine:
loopMine(optional_delay_time);You can manually connect to a node using connect:
connect("address");Check ./src/blockchain.js, have a look at the genesis block, change the receiver address to your public address (because you should be the one who holds all the coins initally). Change the amount of coins if you want, it is set to 100000000 by default.
You shouldn't care about the minting address though, it can be anything you want.
Just forward port, drop your public IP + the port you forwarded in and you are set! If you don't know how to forward port, just search it up online, I can't really put a link here because each router model has a different way to do port forwarding.
Just host a bootstrap node and a node that mines continously, and then ask people to connect to the bootstrap node, and you have technically had a working blockchain network!
This feature is very new, and is likely going to change in the future, but for now, you can read this document on creating smart contracts using a low-level language that I have created called jelscript.
Remember to only use it for experimental purposes, I can not guarantee that this feature will be changed or not in the future.
You can use it now, but wait until 1.0 to have the best experience.
- Improved security and performance.
- Proof-of-stake.
You can use the code in this project to build a chain on your own, but remember to mention me (and any other main contributors of the project) in the credit, thanks.
If you love the project or my tutorial series on dev.to, you can support me by:
- Leaving a star on this repo.
- Buying me a cup of latte through sending me some cryptos to:
- My Bitcoin address:
bc1qk329eh7ggwrx34qnkzkgsm50jjv3x7haydfzk6. - My Ethereum/BSC/Aurora address:
0x029B93211e7793759534452BDB1A74b58De22C9c. - My Near address:
freakdev095.near - My Solana address:
3tpbc8EXnUVqU3nkTSF3wm7NQsmJ2AW7syJGArFdJ9Yd.
- My Bitcoin address:
Thanks a lot for your help, I really appreciate it!
Copyrights © 2021 Nguyen Phu Minh.
This project is licensed under the MIT License.