import { fetchAsync, logUtils } from '@0x/utils'; const DDEX_BASE_URL = 'https://api.ddex.io/v2'; const ACTIVE_MARKETS_URL = `${DDEX_BASE_URL}/markets`; const NO_AGGREGATION_LEVEL = 3; // See https://docs.ddex.io/#get-orderbook const ORDERBOOK_ENDPOINT = `/orderbook?level=${NO_AGGREGATION_LEVEL}`; export const DDEX_SOURCE = 'ddex'; export interface DdexActiveMarketsResponse { status: number; desc: string; data: { markets: DdexMarket[]; }; } export interface DdexMarket { id: string; quoteToken: string; quoteTokenDecimals: number; quoteTokenAddress: string; baseToken: string; baseTokenDecimals: number; baseTokenAddress: string; minOrderSize: string; maxOrderSize: string; pricePrecision: number; priceDecimals: number; amountDecimals: number; } export interface DdexOrderbookResponse { status: number; desc: string; data: { orderBook: DdexOrderbook; }; } export interface DdexOrderbook { marketId: string; bids: DdexOrder[]; asks: DdexOrder[]; } export interface DdexOrder { price: string; amount: string; orderId: string; } // tslint:disable:prefer-function-over-method // ^ Keep consistency with other sources and help logical organization export class DdexSource { /** * Call Ddex API to find out which markets they are maintaining orderbooks for. */ public async getActiveMarketsAsync(): Promise<DdexMarket[]> { logUtils.log('Getting all active DDEX markets'); const resp = await fetchAsync(ACTIVE_MARKETS_URL); const respJson: DdexActiveMarketsResponse = await resp.json(); const markets = respJson.data.markets; logUtils.log(`Got ${markets.length} markets.`); return markets; } /** * Retrieve orderbook from Ddex API for a given market. * @param marketId String identifying the market we want data for. Eg. 'REP/AUG' */ public async getMarketOrderbookAsync(marketId: string): Promise<DdexOrderbook> { logUtils.log(`${marketId}: Retrieving orderbook.`); const marketOrderbookUrl = `${ACTIVE_MARKETS_URL}/${marketId}${ORDERBOOK_ENDPOINT}`; const resp = await fetchAsync(marketOrderbookUrl); const respJson: DdexOrderbookResponse = await resp.json(); return respJson.data.orderBook; } } n value='2020Q2'>2020Q2</option> <option value='2020Q3'>2020Q3</option> <option value='2020Q4'>2020Q4</option> <option value='2021Q1'>2021Q1</option> <option value='2021Q2'>2021Q2</option> <option value='2021Q3'>2021Q3</option> <option value='2021Q4'>2021Q4</option> <option value='2022Q1'>2022Q1</option> <option value='2022Q2'>2022Q2</option> <option value='2022Q3'>2022Q3</option> <option value='2022Q4'>2022Q4</option> <option value='2023Q1'>2023Q1</option> <option value='2023Q2'>2023Q2</option> <option value='2023Q3'>2023Q3</option> <option value='2023Q4'>2023Q4</option> <option value='2024Q1'>2024Q1</option> 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