Blockstore

A distributed key-value storage system built on top of blockchain technology™

About

The system is built on nodejs using TypeScript. The lower-level elements of the code such as the blockchain functions are implemented in C++17, thus we use packages that allow for an interface between the node event loop and executing C++ functions. src/app contains a demo application consisting of creating posts, and comments on those posts, which sends HTTP requests to instances of Blockstore server nodes located in src/bs/ts

Getting Started (Linux/Ubuntu)

Clone the repo

git clone git@github.com:FatihBAKIR/blockchain.git

Install the node packages

cd src/app
npm install
cd ../bs/cpp
npm install
cd ../ts
npm install

If not already installed, install cmake-js. NOTE: This will install it globally
```
sudo npm install -g cmake-js
```
If not already installed, install cmake version 3.9 or greater. NOTE: If your Linux version is a LTS version, the apt package may be too old. In this case, you'll need to download the latest stable version of cmake and build it from source
```
# Non-LTS Linux version
sudo apt-get install cmake
```

LTS Linux version

If you accidentaly installed the apt package of cmake but ended up needing to build it from source, remove the package

sudo apt remove cmake

Download the latest stable release (https://cmake.org/download/), unpack the file, and cd into it

./configure make -j8 sudo make install


5. Cmake will need a compiler supporting C++17 features. Check your `gcc` version, and if it isn't 7+, search for a package supporting `gcc-7`. If no results are found, Use a ppa to build it from source

Check your gcc version

gcc --version

If it isn't 7+, search to see if an apt package is available

apt search gcc-7

If no package was avaialble, use this PPA to discover and install 7+

sudo add-apt-repository ppa:ubuntu-toolchain-r/test -y sudo apt-get update apt search gcc-7 sudo apt install g++-7 -y export CXX=g++-7 export CC=gcc-7


6. Compile the C++ code. *NOTE: If you previously attempted to build it (and failed), you'll need to remove your build/ directory*

rm -rf build/ cmake-js build


7. Install TypeScript. *NOTE: This will install it globally*

sudo npm install -g typescript


8. Compile the TypeScript code to JavaScript

tsc


9. Use node to start the demo application server (app/build/index.js) or an instance of the Blockstore server (bs/ts/build/index.js)

node app/build/index.js node bs/ts/build/index.js

FatihBAKIR / blockstore

readme