init backend api demo

.gitignore

@@ -33,4 +33,6 @@ coverage.json
 __pycache__/
 
 .npmrc
-.editorconfig
+.editorconfig
+
+*/.idea

backend-api-demo/README.md

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+# Pendle Limit Order API Demo
+
+This repository is designed for developers seeking to interact with Pendle Backend using TypeScript. 
+
+The demo project demonstrates how to 
+- Get list of pendle markets and assets
+- Get asset's price (spot prices, historical prices)
+- Get Swapping prices
+- Get market historical info
+
+## Getting Started
+To run examples:
+- Change directory to the demo project folder: `cd limit-order-api-demo`
+- Install required dependencies with `npm install`
+- Execute the index.ts file using `npm run start`
+
+## Api specifications
+* [Documentation](https://api-v2.pendle.finance/external/docs#/)
+
+## Additional Notes
+
+Please be aware that the code examples provided in this repository are for educational purposes and are not intended for production use. They serve as a starting point for integrating Pendle Backend functionality into your decentralized application (dApp).

backend-api-demo/package.json

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+{
+  "name": "backend-api-demo",
+  "version": "1.0.0",
+  "description": "Pendle Backend API Demo",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "start": "npx ts-node ./src/index.ts"
+  },
+  "author": "Manh Cao Duy",
+  "license": "ISC",
+  "dependencies": {
+    "axios": "^1.7.3"
+  }
+}

backend-api-demo/src/const.ts

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+export const EXTERNAL_DOMAIN = `https://api-v2.pendle.finance/api/external`;

backend-api-demo/src/get-asset-prices.ts

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+import { EXTERNAL_DOMAIN } from "./const";
+import axios from "axios";
+
+interface GetSpotPriceParam {
+  chainId: number;
+}
+
+interface GetSpotPriceQuery {
+  address?: string[];
+}
+
+interface GetSpotPriceResponse {
+  prices: Record<string, number>;
+}
+
+interface GetHistoricalPricesParam {
+  chainId: number;
+  address: string;
+}
+
+interface GetHistoricalPricesQuery {
+  timeFrame?: "hour" | "day" | "week";
+  timestampStart?: Date;
+  timestampEnd?: Date;
+}
+
+interface HistoricalPriceData {
+  timestamps: number[];
+  highs: number[];
+  lows: number[];
+  opens: number[];
+  closes: number[];
+}
+
+interface GetHistoricalPricesResponse {
+  total: number;
+  limit: number;
+  currency: string;
+  timestampStart: string;
+  timestampEnd: string;
+  data: HistoricalPriceData;
+}
+
+export async function getAssetPrices() {
+  // This is an example of how to get all spot prices of assets on Ethereum
+
+  const param: GetSpotPriceParam = {
+    chainId: 1, // Ethereum
+  };
+
+  const targetPath = `/v1/${param.chainId}/assets/prices`;
+
+  const { data } = await axios.get<GetSpotPriceResponse>(EXTERNAL_DOMAIN + targetPath);
+
+  const { prices } = data;
+
+  const key = Object.keys(prices)[0];
+  console.log(`prices of ${key} is ${prices[key]} USD`);
+}
+
+export async function getHistoricalAssetPrices() {
+  // This is an example of how to get daily historical prices from 2024 Aug 5th to Aug 11st of PT-USDO++ on Ethereum
+
+  const param: GetHistoricalPricesParam = {
+    chainId: 1, // Ethereum
+    address: '0x270d664d2fc7d962012a787aec8661ca83df24eb' // PT-USD0++ 31OCT 2024
+  };
+
+  const query: GetHistoricalPricesQuery = {
+    timeFrame: "day",
+    timestampStart: new Date("2024-08-05T00:00:00.000+00:00"),
+    timestampEnd: new Date("2024-08-11T00:00:00.000+00:00"),
+  };
+
+  const targetPath = `/v1/${param.chainId}/assets/${param.address}/historical-prices`;
+  const { data: response } = await axios.get<GetHistoricalPricesResponse>(EXTERNAL_DOMAIN + targetPath, { params: query });
+  console.log('response data', {total: response.total, limit: response.limit, currency: response.currency, timestampStart: response.timestampStart, timestampEnd: response.timestampEnd});
+
+  const {data} = response;
+  console.log('first data point info', {
+    timestamp: data.timestamps[0],
+    high: data.highs[0],
+    low: data.lows[0],
+    open: data.opens[0],
+    close: data.closes[0],
+  })
+}

backend-api-demo/src/get-list-assets.ts

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+import axios from "axios";
+import { EXTERNAL_DOMAIN } from "./const";
+
+interface Param {
+  chainId: number;
+}
+
+interface AssetInfo {
+  name: string;
+  decimals: number;
+  address: string;
+  symbol: string;
+  tags: string[];
+  expiry: string;
+}
+
+interface Response {
+  assets: AssetInfo[];
+}
+
+export async function getAssetList() {
+  // This is an example of how to get list of Pendle assets on Ethereum
+
+  const param: Param = {
+    chainId: 1, // Ethereum
+  }
+
+  const targetPath = `/v1/${param.chainId}/assets/all`;
+
+  const { data } = await axios.get<Response>(EXTERNAL_DOMAIN + targetPath);
+
+  const { assets } = data;
+
+  const {name, address, decimals, expiry, symbol, tags} = assets[0];
+
+  console.log('first asset', {name, address, decimals, expiry, symbol, tags});
+}

backend-api-demo/src/get-list-markets.ts

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+import axios from "axios";
+import { EXTERNAL_DOMAIN } from "./const";
+
+interface Param {
+  chainId: number;
+}
+
+interface MarketInfo {
+  name: string;
+  address: string;
+  expiry: string;
+  pt: string;
+  yt: string;
+  sy: string;
+}
+
+interface Response {
+  markets: MarketInfo[];
+}
+
+export async function getActiveMarkets() {
+  // This is an example of how to get list of active Pendle markets on Ethereum
+
+  const param: Param = {
+    chainId: 1, // Ethereum
+  }
+
+  const targetPath = `/v1/${param.chainId}/markets/active`;
+
+  const { data } = await axios.get<Response>(EXTERNAL_DOMAIN + targetPath);
+
+  const { markets } = data;
+
+  const {name, address, expiry, pt, sy, yt} = markets[0];
+
+  console.log('first active market', {name, address, expiry, pt, sy, yt});
+}
+
+export async function getInactiveMarkets() {
+  // This is an example of how to get list of inactive Pendle markets on Ethereum
+
+  const param: Param = {
+    chainId: 1, // Ethereum
+  }
+
+  const targetPath = `/v1/${param.chainId}/markets/inactive`;
+
+  const { data } = await axios.get<Response>(EXTERNAL_DOMAIN + targetPath);
+
+  const { markets } = data;
+
+  const {name, address, expiry, pt, sy, yt} = markets[0];
+
+  console.log('first inactive market', {name, address, expiry, pt, sy, yt});
+}

backend-api-demo/src/get-market-historical-data.ts

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+import { EXTERNAL_DOMAIN } from "./const";
+import axios from "axios";
+
+interface Param {
+  chainId: number;
+  address: string;
+}
+
+interface Query {
+  timeFrame?: "hour" | "day" | "week";
+  timestampStart?: Date;
+  timestampEnd?: Date;
+}
+
+interface MarketHistoricalData {
+  timestamps: number[];
+  underlyingApys: number[];
+  impliedApys: number[];
+}
+
+interface Response {
+  total: number;
+  limit: number;
+  currency: string;
+  timestampStart: string;
+  timestampEnd: string;
+  data: MarketHistoricalData;
+}
+
+export async function getMarketHistoricalData() {
+  // This is an example of how to get daily historical data from 2024 Aug 5th to Aug 11st of USDO++ market on Ethereum
+
+  const param: Param = {
+    chainId: 1, // Ethereum
+    address: '0x00b321d89a8c36b3929f20b7955080baed706d1b', // USDO++
+  }
+
+  const query: Query = {
+    timeFrame: 'day',
+    timestampStart: new Date("2024-08-05T00:00:00.000+00:00"),
+    timestampEnd: new Date("2024-08-11T00:00:00.000+00:00"),
+  }
+
+  const targetPath = `/v1/${param.chainId}/markets/${param.address}/historical-data`;
+
+  const { data: response } = await axios.get<Response>(EXTERNAL_DOMAIN + targetPath, {params: query});
+  console.log('response data', {total: response.total, limit: response.limit, timestampStart: response.timestampStart, timestampEnd: response.timestampEnd});
+
+  const {data} = response;
+  console.log('first data point info', {
+    timestamp: data.timestamps[0],
+    underlyingApy: data.underlyingApys[0],
+    impliedApy: data.impliedApys[0],
+  })
+}