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https://github.com/luckychain/lucky

Proof of luck Intel SGX and IPFS based blockchain.
https://github.com/luckychain/lucky

blockchain ipfs proof-of-luck sgx

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Proof of luck Intel SGX and IPFS based blockchain.

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README 

        
# Luckychain



Luckychain is a blockchain [layered on top](http://mitar.tnode.com/post/146227562556/towards-layered-re-decentralized-web)

of [IPFS](https://ipfs.io/). It uses [Intel SGX](https://software.intel.com/en-us/sgx)

capabilities of modern CPUs for Proof of Luck consensus algorithm which allows energy efficient mining.

Transactions can reference arbitrary data of practically unlimited size. A new block is mined on

average every 13 seconds. It is written in JavaScript and uses a [NPM package which allows running JavaScript in SGX enclaves](https://github.com/luckychain/node-secureworker).



**Warning: This is a prototype. Do not use it yet for anything important.**



Current implementation uses mock SGX implementation without any of the security assurances of the SGX platform.

Help finalizing the [NPM package with full SGX support is welcome](https://github.com/luckychain/node-secureworker).



## Build guide



This library has the following system dependencies:



* [node.js](https://nodejs.org/) (tested with v6.10.0): 

  * You can install it from [nodejs.org](https://nodejs.org/en/),

  * or use your system's package,

  * or [Node Version Manager](https://github.com/creationix/nvm).

* [IPFS](https://ipfs.io/)

  * Download the [prebuilt package](https://ipfs.io/docs/install/),

  * then untar the package `tar xvfz go-ipfs.tar.gz`

  * and run `ln -s "$(pwd)/go-ipfs/ipfs" /usr/local/bin/ipfs`.



After installing the aforementioned system dependencies, install the node dependencies in the root of this repository:



```

$ npm install

```



## Start



Initialize IPFS the first time:



```

$ ipfs init

```



Start the IPFS daemon:



```

$ ipfs daemon --enable-pubsub-experiment

```



Lastly, start the application:

```

$ npm start

```



Open the web interface at [http://localhost:8000](http://localhost:8000).



## Docker



You can use [Docker to run Luckychain](https://hub.docker.com/r/luckychain/luckychain/):



```

docker run -d -p 4001:4001/tcp -p 4002:4002/udp -p 8000:8000/tcp --name luckychain luckychain/luckychain:master

```



## Whitepaper



The whitepaper describing Proof of luck consensus protocol and Luckychain blockchain was published in

SysTEX '16 Proceedings of the 1st Workshop on System Software for Trusted Execution,

[DOI 10.1145/3007788.3007790](http://dx.doi.org/10.1145/3007788.3007790).



Available at:



* https://dl.acm.org/citation.cfm?id=3007790

* https://arxiv.org/abs/1703.05435

* https://eprint.iacr.org/2017/249



Abstract:



> In the paper, we present designs for multiple blockchain consensus primitives and a novel blockchain

> system, all based on the use of trusted execution environments (TEEs), such as Intel SGX-enabled CPUs.

> First, we show how using TEEs for existing proof of work schemes can make mining equitably distributed

> by preventing the use of ASICs. Next, we extend the design with proof of time and proof of ownership

> consensus primitives to make mining energy- and time-efficient. Further improving on these designs,

> we present a blockchain using a proof of luck consensus protocol. Our proof of luck blockchain uses

> a TEE platform's random number generation to choose a consensus leader, which offers low-latency

> transaction validation, deterministic confirmation time, negligible energy consumption, and equitably

> distributed mining. Lastly, we discuss a potential protection against up to a constant number of

> compromised TEEs.



You can cite it as:



```

@inproceedings{Milutinovic2016,

 author = {Milutinovic, Mitar and He, Warren and Wu, Howard and Kanwal, Maxinder},

 title = {Proof of Luck: An Efficient Blockchain Consensus Protocol},

 booktitle = {Proceedings of the 1st Workshop on System Software for Trusted Execution},

 series = {SysTEX '16},

 year = {2016},

 isbn = {978-1-4503-4670-2},

 location = {Trento, Italy},

 pages = {2:1--2:6},

 articleno = {2},

 numpages = {6},

 url = {http://doi.acm.org/10.1145/3007788.3007790},

 doi = {10.1145/3007788.3007790},

 acmid = {3007790},

 publisher = {ACM},

 address = {New York, NY, USA},

 keywords = {Blockchain, Consensus Protocol, Intel SGX, Trusted Execution Environments},

} 

```