SingularityNetwork

Includes contracts, migrations, tests, user interface and webpack build pipeline.

Design Specifications

Smart Contracts Design

Requirements

• Node.js (7.6 +)
• Npm

Install

Dependencies

npm install

Test

Parity

Parity requires Rust version 1.19.0 to build

• Linux:

  $ curl https://sh.rustup.rs -sSf | sh

  Parity also requires gcc, g++, libssl-dev/openssl, libudev-dev and pkg-config packages to be installed.

• OSX:

  $ curl https://sh.rustup.rs -sSf | sh

Download and build Parity

# download Parity code
$ git clone https://github.com/paritytech/parity
$ cd parity

# build in release mode
$ cargo build --release

This will produce an executable in the ./target/release subdirectory. Note: if cargo fails to parse manifest try:

$ ~/.cargo/bin/cargo build --release

Start Parity

To start Parity manually, just run

$ ./target/release/parity

and Parity will begin syncing the Ethereum blockchain.

Hint

Add parity to your command list:

  cp /target/release/parity /usr/local/bin 

Usage

You can choose of using web3 with Python and Javascript

Python

Install web3

pip install web3

Using Web3

To use the web3 library you will need to instantiate an instance of the Web3 object.

>>> from web3 import Web3, HTTPProvider, IPCProvider

# Note that you should create only one RPCProvider per
# process, as it recycles underlying TCP/IP network connections between
# your process and Ethereum node
>>> web3 = Web3(HTTPProvider('http://localhost:8545'))

# or for an IPC based connection
>>> web3 = Web3(IPCProvider())
>>> web3.eth.blockNumber
4000000

This web3 instance will now allow you to interact with the Ethereum blockchain.

Javascript

npm i -s web3

Create in /app folder an index.js file

Use the web3 object directly from global namespace:

console.log(web3); // {eth: .., shh: ...} // it's here!

Set a provider (HttpProvider)

if (typeof web3 !== 'undefined') {
  web3 = new Web3(web3.currentProvider);
} else {
  // set the provider you want from Web3.providers
  web3 = new Web3(new Web3.providers.HttpProvider("http://localhost:8545"));
}

Set a provider (HttpProvider using HTTP Basic Authentication)

web3.setProvider(new web3.providers.HttpProvider('http://host.url', 0, BasicAuthUsername, BasicAuthPassword));

There you go, now you can use it:

var coinbase = web3.eth.coinbase;
var balance = web3.eth.getBalance(coinbase);

You can find more examples in example directory.