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Scorex - The modular blockchain framework Build Status

Motivation

There are two huge problems around cryptocurrencies development project Scorex aims to weaken:

  • Bitcoin Core source code contains more 100K lines of code(80K of C++ only), Nxt is more than 45K line of Java code. All parts of the design(network/transactional/consensus protocols) are mixed in a hard way. So researchers and developers are not in good start positions to make experiments.

In opposite, Scorex is less than 4K lines of Scala code. Transactional layer is as simple as that. Consensus algo could be switched easily(with two consensus algos out of the box, one could be replaced with an another with just one line of code edited!)

  • New coins are trying to make money immediately, often having just one or two pretty controversial feature. Scorex is the free and open tool aiming to make other systems development easier.

Features

  • Compact, functional code
  • Modular design
  • Scala language
  • Two 100% Proof-of-Stake consensus algos out of the box, Nxt-like and Qora-like. One algo could be replaced with an another with just one line of code edited (in PermaConstants.scala)
  • Simplest transactional model
  • Asynchronous network layer on top of TCP
  • JSON API
  • Command line client for the JSON API
  • Cryptographic primitives externalized into separate scrypto framework

This is the pretty buggy initial release version! Please report bugs found, and contribute with fixes, if possible.

Lagonaki

Scorex is modular framework for developers and since version 1.2.2 we have removed runnables from it(except of some fake runnables needed for integration tests). If you want to run something built on top of Scorex, take a look to Lagonaki, our first application with public testnet. It is in another repo: https://github.com/ScorexProject/Lagonaki.

Installation

  • Ubuntu Server

Install Oracle Java8 JDK:

echo "deb http://ppa.launchpad.net/webupd8team/java/ubuntu precise main" | tee -a /etc/apt/sources.list

echo "deb-src http://ppa.launchpad.net/webupd8team/java/ubuntu precise main" | tee -a /etc/apt/sources.list

apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys EEA14886

apt-get update

apt-get install oracle-java8-installer

and agree with license terms

Install SBT(Scala Build Tool):

echo "deb http://dl.bintray.com/sbt/debian /" | sudo tee -a /etc/apt/sources.list.d/sbt.list

apt-get update

apt-get install sbt

Command-Line Client

Run ./cli.sh after launching server to issue API requests to it via command-line client. See API section below. Some examples of CLI commands:

  • GET blocks/first
  • POST payment {"amount":400, "fee":1, "sender":"2kx3DyWJpYYfLErWpRMLHwkL1ZGyKHAPNKr","recipient":"Y2BXLjiAhPUMSo8iBbDEhv81VwKnytTXsH"}

Tests

Run sbt test to run tests. Read more about testing with sbt at http://www.scala-sbt.org/0.13/docs/Testing.html

API

There's separate API.md file with API description

Current Limitations

todo: current glitches / limitations list

Documentation and Resources

Articles:

The Architecture Of A Cryptocurrency

On the Way to a Modular Cryptocurrency, Part 1: Generic Block Structure

On the Way to a Modular Cryptocurrency, Part 2: Stackable API

On Private Blockchains, Technically

Readmes:

Scorex-Basics Sub-Module

Others:

API Description

Please join our mail-list: https://groups.io/g/scorex-dev .

Contributions

Contributions are welcome! Please take a look into issues. Testing codebase is very small at the moment, so writing a test is not just good for start, but useful as well.

License

To the extent possible under law, the authors have dedicated all copyright and related and neighboring rights to this software to the public domain worldwide. This software is distributed without any warranty. You can find applied CC0 license legalcode in the COPYING

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