import {CtorCoinTypes} from "../abstract/IPriceProvider";
import {ExchangePriceProvider} from "./abstract/ExchangePriceProvider";
import {MultiChain} from "../../swapper/Swapper";
import {httpGet} from "../../http/HttpUtils";

export type BinanceResponse = {
    symbol: string;
    price: string;
};

/**
 * Price provider using Binance exchange API
 *
 * @category Pricing
 */
export class BinancePriceProvider<T extends MultiChain> extends ExchangePriceProvider<T> {

    constructor(coinsMap: CtorCoinTypes<T>, url: string = "https://api.binance.com/api/v3", httpRequestTimeout?: number) {
        super(coinsMap, url, httpRequestTimeout);
    }

    /**
     * @inheritDoc
     */
    protected async fetchPair(pair: string, abortSignal?: AbortSignal) {
        const response = await httpGet<BinanceResponse>(
            this.url+"/ticker/price?symbol="+pair,
            this.httpRequestTimeout,
            abortSignal
        );

        return parseFloat(response.price);
    }

    /**
     * @inheritDoc
     */
    protected async fetchUsdPrice(abortSignal?: AbortSignal): Promise<number> {
        const response = await httpGet<BinanceResponse>(
            this.url+"/ticker/price?symbol=BTCUSDC",
            this.httpRequestTimeout,
            abortSignal
        );

        return parseFloat(response.price)/100000000;
    }

}