64 lines
1.5 KiB
TypeScript
64 lines
1.5 KiB
TypeScript
import { createContext, useContext } from "react";
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import useSWRImmutable from "swr/immutable";
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import { chainInfoURL } from "./url";
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import { OtterscanRuntime } from "./useRuntime";
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export type ChainInfo = {
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network: string | undefined;
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faucets: string[];
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nativeCurrency: {
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name: string;
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symbol: string;
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decimals: number;
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};
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};
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export const defaultChainInfo: ChainInfo = {
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network: undefined,
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faucets: [],
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nativeCurrency: {
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name: "Ether",
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symbol: "ETH",
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decimals: 18,
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},
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};
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export const ChainInfoContext = createContext<ChainInfo | undefined>(undefined);
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const chainInfoFetcher = async (assetsURLPrefix: string, chainId: number) => {
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const url = chainInfoURL(assetsURLPrefix, chainId);
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const res = await fetch(url);
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if (!res.ok) {
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return defaultChainInfo;
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}
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const info: ChainInfo = await res.json();
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return info;
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};
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export const useChainInfoFromMetadataFile = (
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runtime: OtterscanRuntime | undefined
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): ChainInfo | undefined => {
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const assetsURLPrefix = runtime?.config?.assetsURLPrefix;
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const chainId = runtime?.provider?.network.chainId;
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const { data, error } = useSWRImmutable(
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assetsURLPrefix !== undefined && chainId !== undefined
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? [assetsURLPrefix, chainId]
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: null,
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chainInfoFetcher
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);
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if (error) {
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return defaultChainInfo;
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}
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return data;
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};
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export const useChainInfo = (): ChainInfo => {
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const chainInfo = useContext(ChainInfoContext);
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if (chainInfo === undefined) {
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throw new Error("no chain info");
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}
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return chainInfo;
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};
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