https://github.com/tarunbatra/naivecoin
Crypto-currency implementation on top of naivechain
https://github.com/tarunbatra/naivecoin
bitcoin blockchain cryptocurrency demo proof-of-concept
Last synced: 8 months ago
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Crypto-currency implementation on top of naivechain
- Host: GitHub
- URL: https://github.com/tarunbatra/naivecoin
- Owner: tarunbatra
- License: apache-2.0
- Created: 2017-03-09T08:48:59.000Z (over 8 years ago)
- Default Branch: master
- Last Pushed: 2017-03-13T07:54:25.000Z (over 8 years ago)
- Last Synced: 2025-01-12T10:27:05.503Z (9 months ago)
- Topics: bitcoin, blockchain, cryptocurrency, demo, proof-of-concept
- Language: JavaScript
- Size: 89.8 KB
- Stars: 0
- Watchers: 2
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: License.txt
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README
# Naivechain - a blockchain implementation in 200 lines of code
### Motivation
All the current implementations of blockchains are tightly coupled with the larger context and problems they (e.g. Bitcoin or Ethereum) are trying to solve. This makes understanding blockchains a necessarily harder task, than it must be. Especially source-code-wisely. This project is an attempt to provide as concise and simple implementation of a blockchain as possible.
### What is blockchain
[From Wikipedia](https://en.wikipedia.org/wiki/Blockchain_(database)) : Blockchain is a distributed database that maintains a continuously-growing list of records called blocks secured from tampering and revision.
### Key concepts of Naivechain
Check also [this blog post](https://medium.com/@lhartikk/a-blockchain-in-200-lines-of-code-963cc1cc0e54#.dttbm9afr5) for a more detailed overview of the key concepts
* HTTP interface to control the node
* Use Websockets to communicate with other nodes (P2P)
* Super simple "protocols" in P2P communication
* Data is not persisted in nodes
* No proof-of-work or proof-of-stake: a block can be added to the blockchain without competition
### Quick start
(set up two connected nodes and mine 1 block)
```
npm install
HTTP_PORT=3001 P2P_PORT=6001 npm start
HTTP_PORT=3002 P2P_PORT=6002 PEERS=ws://localhost:6001 npm start
curl -H "Content-type:application/json" --data '{"data" : "Some data to the first block"}' http://localhost:3001/mineBlock
```
### Quick start with Docker
(set up three connected nodes and mine a block)
###
```sh
docker-compose up
curl -H "Content-type:application/json" --data '{"data" : "Some data to the first block"}' http://localhost:3001/mineBlock
```
### HTTP API
##### Get blockchain
```sh
curl http://localhost:3001/blocks
```
##### Get single block
```sh
curl http://localhost:3001/block/:id
```
##### Get transactions
```sh
curl http://localhost:3001/transactions
```
##### Get single transaction
```sh
curl http://localhost:3001/transaction/:id
```
##### Get accounts
```sh
curl http://localhost:3001/accounts
```
##### Get single account
```sh
curl http://localhost:3001/account/:id
```
##### Get node's account
```sh
curl http://localhost:3001/my-account
```
##### Create transaction
```sh
curl -H "Content-type:application/json" --data '{ \
"from": "", \
"to": "receiver-address", \
"value": 12 \
}' http://localhost:3001/transact
```
##### Add peer
```sh
curl -H "Content-type:application/json" --data '{"peer" : "ws://localhost:6001"}' http://localhost:3001/addPeer
```
#### Query connected peers
```sh
curl http://localhost:3001/peers
```
#### Try to modify data in blockchain
```sh
curl -H "Content-type:application/json" --data '{"index": "2", "data": "malicious data"}' http://localhost:3001/turnMalicious
```