Anyswap Fetcher

The tool you can get a exchange rate of tokenA and tokenB just by putting their token addresses.

Install

yarn add anyswap-fetcher

or

npm i anyswap-fetcher

Exchange

• Uniswap V3
  • UNIV3
• Sushiswap
  • SUSHI
• Quickswap
  • QUICK

I only checked this library works fine on the test case in tests directory but I believe other combinations works well. (e.g. Uniswap on Polygon)

Usage

fetchExchangeRate

fetchExchangeRate(token0: string, token1: string, rpc: string, exchange: Exchange, amount: number = 1)

You can fetch the exchange rate of given tokens.

inputToken: token0 ourputToken: token1

fetchBidirectionalExchangeRate

fetchBidirectionalExchangeRate(token0: string, token1: string, rpc: string, exchange: Exchange, amount: number = 1 )

You can fetch the exchange rate of given tokens in bidirectional.

Examples

Fetch Exchange Price from V2Pool in Bidirectional

import { V2Fetcher } from "anyswap-fetcher";

const USDC_ADDRESS = "0x2791bca1f2de4661ed88a30c99a7a9449aa84174";

const JPYC_ADDRESS = "0x6ae7dfc73e0dde2aa99ac063dcf7e8a63265108c";

const RPC_NODE_POLYGON = "https://polygon-rpc.com/";

async function main() {
  const quick = new V2Fetcher(
    USDC_ADDRESS,
    JPYC_ADDRESS,
    RPC_NODE_POLYGON,
    "QUICK" // exchange
  ).fetchBidirectionalExchangeRate();

  console.log(await quick);
}

main();

Fetch Exchange Price from V3Pool in Bidirectional

import { ethers } from "ethers";
import { V3Fetcher } from "anyswap-fetcher";

const USDC_ADDRESS = "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48";
const ETH_ADDRESS = "0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2";

const RPC_NODE_MAINNET = "https://cloudflare-eth.com/";

async function main() {
  const quick = new V3Fetcher(
    USDC_ADDRESS,
    ETH_ADDRESS,
    RPC_NODE_MAINNET,
    // Don't have to write exchange since Uniswap is the only exchange which have V3 contracts for now.
  ).fetchBidirectionalExchangeRate();

  console.log(await quick);
}

main();

Fetch Exchange Price from V3AlphaAutoRouter in Bidirectional

import { ethers } from "ethers";
import { V3AutoRouterFetcher } from "anyswap-fetcher";

const USDC_ADDRESS = "0x2791bca1f2de4661ed88a30c99a7a9449aa84174";
const JPYC_ADDRESS = "0x6ae7dfc73e0dde2aa99ac063dcf7e8a63265108c";

const RPC_NODE_POLYGON = "https://polygon-rpc.com/";

async function main() {
  const uniAuto = new V3AutoRouterFetcher(
    USDC_ADDRESS,
    JPYC_ADDRESS,
    RPC_NODE_POLYGON,
    "UNIV3"
  ).fetchBidirectionalExchangeRate();

  console.log(await quick); // Output: [ 114.288142, 0.008731 ]
}

main();