43 lines
1.2 KiB
TypeScript
43 lines
1.2 KiB
TypeScript
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import { useEffect, useMemo, useState } from "react";
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import { JsonRpcProvider, BlockTag } from "@ethersproject/providers";
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import { Contract } from "@ethersproject/contracts";
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import { BigNumber } from "@ethersproject/bignumber";
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import AggregatorV3Interface from "@chainlink/contracts/abi/v0.8/AggregatorV3Interface.json";
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export const useETHUSDOracle = (
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provider: JsonRpcProvider | undefined,
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blockTag: BlockTag | undefined
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) => {
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const ethFeed = useMemo(() => {
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if (!provider || provider.network.chainId !== 1) {
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return undefined;
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}
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try {
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return new Contract("eth-usd.data.eth", AggregatorV3Interface, provider);
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} catch (err) {
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console.error(err);
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return undefined;
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}
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}, [provider]);
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const [latestPriceData, setLatestPriceData] = useState<BigNumber>();
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useEffect(() => {
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if (!ethFeed || !blockTag) {
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return;
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}
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const readData = async () => {
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try {
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const priceData = await ethFeed.latestRoundData({ blockTag });
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setLatestPriceData(BigNumber.from(priceData.answer));
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} catch (err) {
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console.error(err);
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}
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};
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readData();
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}, [ethFeed, blockTag]);
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return latestPriceData;
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};
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