Phragmen Leaderboard

Nodejs implementation of Phragmén Method for Substrate-base Networks (without edges reduce optimisations).

Check wiki about method here

Install

npm i phragmen-substrate

Use

const { ApiPromise, WsProvider } = require('@polkadot/api')
const phragmen = require('phragmen-substrate')

const provider = new WsProvider('wss://cc1-1.polkadot.network');
ApiPromise.create({ provider }).then(api => {
    phragmen.getLeaderboard(20, api).then(result => {
        console.log(JSON.stringify(result))
    })
})

Examples

The example applications runs a simple web server on port 3000, on which you can get the top 20 winners of the election. Also create winners json files in results folder.

To run example

npm install

node ./examples/polkadot/main.js

or

node ./examples/kusama/main.js

To change network

You can set ws uri in env parameters

export NODE_WS=ws://127.0.0.1:9944/

To change port

You can also set web server port in env parameters

export SERVER_PORT=3000