為什麼我無法訪問 Uniswap v3 Factory .getPool() 函式？

作為個人練習，我正在嘗試將以下 Uniswap v2 項目轉換為 Uniswap v3：

Uniswap 代幣價格監控（這不是交換），即 ETH/DAI <https://www.youtube.com/watch?v=j_wVh_Sa1rU> <https://github.com/RudreshVeerkhare/UniswapPriceMonitor>

我專注於嘗試訂閱觸發的 WebSocket 事件，然後池價格被更新，並且已經達到需要獲取 DAI/WETH（500 費用等級）對的工廠池地址的地步。

我相信該功能可用，如下所示：

程式碼設置：

require("dotenv").config({});

const { ethers } = require('ethers');
let alchemyRopstenProvider = new ethers.providers.JsonRpcProvider(process.env.RPC_ALCHEMY_HTTP_ROPSTEN_URL);
let alchemyRopstenWSProvider = new ethers.providers.WebSocketProvider(process.env.RPC_ALCHEMY_WSS_ROPSTEN_url, "ropsten");

//import {abi as FACTORY_ABI, bytecode as FACTORY_BYTECODE} from '@uniswap/v3-core/artifacts/contracts/UniswapV3Factory.sol/UniswapV3Factory.json'
const FACTORY_ABI = require("@uniswap/v3-core/artifacts/contracts/UniswapV3Factory.sol/UniswapV3Factory.json").abi
const FACTORY_BYTECODE = require("@uniswap/v3-core/artifacts/contracts/UniswapV3Factory.sol/UniswapV3Factory.json").bytecode
const UniswapV3Factory = require("@uniswap/v3-core/artifacts/contracts/UniswapV3Factory.sol/UniswapV3Factory.json");        // ABI file
const UniswapV3Pool = require("@uniswap/v3-core/artifacts/contracts/UniswapV3Pool.sol/UniswapV3Pool.json");
const provider = alchemyRopstenProvider;    // set the provider
const wsProvider = alchemyRopstenWSProvider;
let wallet = new ethers.Wallet(process.env.WALLET_PRIVATE_KEY, provider);
// needed to get things like pool addresses from token symbols AND feeTier (100,500,3000) - getPool(address,address,uint24)
const uniswapV3Factory = new ethers.Contract("0x5C69bEe701ef814a2B6a3EDD4B1652CB9cc5aA6f", FACTORY_ABI, wallet);
const Big = require("big.js");
//const Web3 = require('web3');   //change to ethers

module.exports = { ethers, provider, wsProvider  }
//
// End Config
//

console.log("starting...");

const INTERVAL = 5000;      // ms

// define address of Pair contract 
// Pair address is found from the Uniswap pools page; address from pair URL - https://v3.info.uniswap.org/pairs#/pools
// DAI - stable coin
const PAIR_ADDRESS = "0xc2e9f25be6257c210d7adf0d4cd6e3e881ba25f8";
const PAIR_NAME = "DAI/ETH";

// v3 require pool with feeTier - get from factor
const daiAddress = "0x6b175474e89094c44da98b954eedeac495271d0f";
const wethAddress = "0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2";

const runBot = async () => {

   let pairPool;       // pairPool contract
   const loadPairs = async () => {
       pairPool = new ethers.Contract(await UniswapV3Factory.getPool(daiAddress, wethAddress, 500), // <<<=== .getPool is not a function
           UniswapV3Pool.abi,
           wallet
       );
   }
   await loadPairs();

問題是無法訪問合約功能，即 getPool：

pairPool = new ethers.Contract(await UniswapV3Factory.getPool(daiAddress, wethAddress, 500),

我換掉了契約UniswapV3Pool並嘗試執行一些功能 - 同樣的問題。

嘗試將線路切換到：

pairPool = new ethers.Contract(await uniswapV3Factory.getPool(daiAddress, wethAddress, 500),

uniswapV3Factory是您要查詢的實際工廠實例，但此時您正在查詢UniswapV3Factory，這只是 ABI。

引用自：https://ethereum.stackexchange.com/questions/117442