problem.md

Problem: Datasource Connector Tool

Duration: You should not spend more than 4 hours on this problem.

Your solution shall use only Vanilla JavaScript.

Task: Implement a datasource connector to abstract away data retrieval and manipulation from the ViewControllers.
You are required to implement a Datasource utility class. How your implementation will be used:

let ds = new Datasource();
ds.getPrices()
    .then(prices => {
        prices.forEach(price => {
            console.log(`Mid price for ${ price.pair } is ${ price.mid() } ${ price.quote() }.`);
        });
    }).catch(error => {
        console.err(error);
    });

1. Datasource.getPrices() returns a Promise which provides fulfilment handler with an array of prices retrieved from a remote pricing engine.
2. The remote price data can be retrieved from this endpoint https://static.ngnrs.io/test/prices
3. price.mid() returns the mid-point value between price.buy and price.sell.
4. price.quote() returns the quote currency (counter currency) of the trade pair, e.g. for ETHSGD pair the quote currency is SGD.

Expected output:

Mid price for BTCSGD is 8925.7 SGD.
Mid price for LTCUSD is 65.92 USD.
Mid price for ETHSGD is 509.275 SGD.
Mid price for BCHSGD is 852.29 SGD.
Mid price for LTCSGD is 89.94 SGD.
Mid price for BTCUSD is 6529.6 USD.
Mid price for BCHUSD is 625.58 USD.
Mid price for ETHUSD is 373.555 USD.

Please submit your solution using the files provided in this folder
solution.js