DepthManager.ts

export class DepthManager {
    private market : string;
    private bids : {
        [key : string] :string;
    };
    private asks : {
        [key : string] :string;
    };

    constructor(market : string,){
        this.market = market;
        this.bids = {} ;
        this.asks = {} ;
        setInterval(() => {
            this.pollMarket();
        },3000)
    }
    async pollMarket() {
        const res = await fetch(`https://public.coindcx.com/market_data/orderbook?pair=${this.market}`)
        const depth = await res.json();
        this.bids = depth.bids;
        this.asks = depth.asks;
    }
    getRelevantDepth() {
        let highestBid = -100;
        let lowestAsk = 10000000;
        Object.keys(this.bids).map(x => {
            if (parseFloat(x) > highestBid) {
                highestBid = parseFloat(x);
            }
        })
        Object.keys(this.asks).map(x => {
            if (parseFloat(x) < lowestAsk) {
                lowestAsk = parseFloat(x)
            }
        })
        return {
            highestBid,
            lowestAsk
        }
    }
}