如何从 Hardhat 主网分叉获取 Uniswap 数据？

发布于 2025-01-11 23:46:00 字数 200 浏览 3 评论 0原文

我正在使用 Uniswap SDK 使用 Hardhat 的主网分叉从 Uniswap 获取 DAI/ETH 池中 ETH 的价格，但查询返回 ETH 的当前价格，而不是从挂钩区块中获取这是几个月前的事。

如何从 Hardhat 的主网分支获取 Uniswap 池信息？如果无法使用 Uniswap SDK，是否有任何解决方法？

提前致谢！

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神妖 2025-01-18 23:46:00

经过一番搜索，我认为 Uniswap SDK 无法连接到本地主网分支。然而，一个好的解决方法是直接从 Uniswap 合约调用方法。

例如，这将从挂钩区块中获取 ETH 的正确价格：

const UNISWAPV2_ROUTER02_ADDRESS = "0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D";
const UNISWAPV2_ROUTER02_ABI = [{ "inputs": [{ "internalType": "uint256", "name": "amountIn", "type": "uint256" }, { "internalType": "address[]", "name": "path", "type": "address[]" }], "name": "getAmountsOut", "outputs": [{ "internalType": "uint256[]", "name": "amounts", "type": "uint256[]" }], "stateMutability": "view", "type": "function" }]

const DAI_ADDRESS = "0x6b175474e89094c44da98b954eedeac495271d0f";
const WETH_ADDRESS = "0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2";

const uniswap = new ethers.Contract(
    UNISWAPV2_ROUTER02_ADDRESS,
    UNISWAPV2_ROUTER02_ABI,
    ethers.provider,
);

let amountEthFromContract = await uniswap.getAmountsOut(
    1, // 1 ETH
    [WETH_ADDRESS, DAI_ADDRESS]
)

console.log(`1 Eth = ${amountEthFromContract[1].toString()} USD`)

After some searching I don't think the Uniswap SDK can be connected to a local mainnet fork. However, a good workaround is to call methods directly from the Uniswap contract.

For example, this would fetch the correct price of ETH from a pegged block:

const UNISWAPV2_ROUTER02_ADDRESS = "0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D";
const UNISWAPV2_ROUTER02_ABI = [{ "inputs": [{ "internalType": "uint256", "name": "amountIn", "type": "uint256" }, { "internalType": "address[]", "name": "path", "type": "address[]" }], "name": "getAmountsOut", "outputs": [{ "internalType": "uint256[]", "name": "amounts", "type": "uint256[]" }], "stateMutability": "view", "type": "function" }]

const DAI_ADDRESS = "0x6b175474e89094c44da98b954eedeac495271d0f";
const WETH_ADDRESS = "0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2";

const uniswap = new ethers.Contract(
    UNISWAPV2_ROUTER02_ADDRESS,
    UNISWAPV2_ROUTER02_ABI,
    ethers.provider,
);

let amountEthFromContract = await uniswap.getAmountsOut(
    1, // 1 ETH
    [WETH_ADDRESS, DAI_ADDRESS]
)

console.log(`1 Eth = ${amountEthFromContract[1].toString()} USD`)

回复收藏 0 原文

把人绕傻吧 2025-01-18 23:46:00

https://github.com/defi- Wonderland/solidity-boilerplate/blob/main/test/utils/uniswap.ts

代码在这里

import UniswapV2FactoryContract from '@uniswap/v2-core/build/UniswapV2Factory.json';
import UniswapV2Router02Contract from '@uniswap/v2-periphery/build/UniswapV2Router02.json';
import IUniswapV2Pair from '@uniswap/v2-core/build/IUniswapV2Pair.json';
import WETHContract from '@uniswap/v2-periphery/build/WETH9.json';
import { deployContract } from 'ethereum-waffle';

uniswapV2Factory = await deployContract(owner, UniswapV2FactoryContract, [await owner.getAddress()]);
uniswapV2Router02 = await deployContract(owner, UniswapV2Router02Contract, [uniswapV2Factory.address, WETH.address], { gasLimit: 9500000 });

https://github.com/defi-wonderland/solidity-boilerplate/blob/main/test/utils/uniswap.ts

code here

import UniswapV2FactoryContract from '@uniswap/v2-core/build/UniswapV2Factory.json';
import UniswapV2Router02Contract from '@uniswap/v2-periphery/build/UniswapV2Router02.json';
import IUniswapV2Pair from '@uniswap/v2-core/build/IUniswapV2Pair.json';
import WETHContract from '@uniswap/v2-periphery/build/WETH9.json';
import { deployContract } from 'ethereum-waffle';

uniswapV2Factory = await deployContract(owner, UniswapV2FactoryContract, [await owner.getAddress()]);
uniswapV2Router02 = await deployContract(owner, UniswapV2Router02Contract, [uniswapV2Factory.address, WETH.address], { gasLimit: 9500000 });

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