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priceFeedETH.ts
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priceFeedETH.ts
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import { ethers } from "ethers"
const provider = new ethers.providers.JsonRpcProvider("https://polygon-mumbai.g.alchemy.com/v2/tt4Ggo5DlHYUu_G-UxEPY3XawTl5i8WY")
const aggregatorV3InterfaceABI = [
{
inputs: [],
name: "decimals",
outputs: [{ internalType: "uint8", name: "", type: "uint8" }],
stateMutability: "view",
type: "function",
},
{
inputs: [],
name: "description",
outputs: [{ internalType: "string", name: "", type: "string" }],
stateMutability: "view",
type: "function",
},
{
inputs: [{ internalType: "uint80", name: "_roundId", type: "uint80" }],
name: "getRoundData",
outputs: [
{ internalType: "uint80", name: "roundId", type: "uint80" },
{ internalType: "int256", name: "answer", type: "int256" },
{ internalType: "uint256", name: "startedAt", type: "uint256" },
{ internalType: "uint256", name: "updatedAt", type: "uint256" },
{ internalType: "uint80", name: "answeredInRound", type: "uint80" },
],
stateMutability: "view",
type: "function",
},
{
inputs: [],
name: "latestRoundData",
outputs: [
{ internalType: "uint80", name: "roundId", type: "uint80" },
{ internalType: "int256", name: "answer", type: "int256" },
{ internalType: "uint256", name: "startedAt", type: "uint256" },
{ internalType: "uint256", name: "updatedAt", type: "uint256" },
{ internalType: "uint80", name: "answeredInRound", type: "uint80" },
],
stateMutability: "view",
type: "function",
},
{
inputs: [],
name: "version",
outputs: [{ internalType: "uint256", name: "", type: "uint256" }],
stateMutability: "view",
type: "function",
},
]
const addr: string = "0x0715A7794a1dc8e42615F059dD6e406A6594651A" // AggV3 for ETH/USD on mumbai
const priceFeed = new ethers.Contract(addr, aggregatorV3InterfaceABI, provider)
async function getPriceETH() {
const [, price, ,] = await priceFeed.latestRoundData()
console.log(price)
return price
}
export default getPriceETH