Weather-Forecast

A blockchain for weather forecast based on Substrate. We use off-chain worker to fetch data from OpenWeather and automatically submit on-chain transactions of weather proposals to the chain. With an intuitive governance mechanism, a group of selected vote authorities will vote for and confirm the valid proposals through transactions. Meanwhile, they can also cast votes to kick out mis-behavior proposal/vote authorities, if the number of votes pass the threshold.

Available features

The current version has the following features implemented:

• Use off-chain worker to send HTTP request
• Parse JSON data using non-std JSON parser
• Fetch weather data from OpenWeather via off-chain worker
• Submit signed transaction in off-chain worker
• Sudo account adds/removes proposal/vote authorities
• Proposal authorities send on-chain transactions of weather proposals
• Vote authorities vote for valid weather proposals
• Vote authorities cast votes to kick out proposal/vote authorities
• Use PolkadotJS to fetch/parse data from the chain
• UI demonstrates the on-chain weather data via PolkadotJS

How to build the chain:

• Run git clone https://github.com/jiayaoqijia/Weather-Forecast.git.

• Go into the chain folder and run:

• Run

  ./scripts/init.sh
  cargo build --release
  ./target/release/weather-forecast --dev
  

  The above process may take 30 minuites or so, depending on your hardware. This should start your node, and you should see blocks being created.

How to build the Weather UI:

• Go into the ui folder and run:

  yarn 
  yarn build
  yarn start
  

  This should start a web server on localhost:8080 where you can see the weather fetched from the chain as shown below.

How to build the PolkadotJS apps:

• Go into the apps folder and run:

  yarn 
  yarn run start
  

  This should start a web server on localhost:3000 where you can interact with the chain as shown below.

How to build the tests:

• Go into the scripts/tests folder and run:

  yarn 
  yarn start
  

  This should use PolkadotJS apis to connect to/interact with the chain.

How to interact with the chain:

• Please follow the steps in the wiki.

License

Weather Forecast is GPL 3.0 licensed.