otterscan/src/hooks.ts

import { useMemo } from "react";
import { JsonRpcProvider } from "@ethersproject/providers";
import { ChecksummedAddress } from "./types";
import { Metadata, useMultipleMetadata } from "./sourcify/useSourcify";
import { useAppConfigContext } from "./useAppConfig";
import { useAddressesWithCode } from "./useErigonHooks";

export const useDedupedAddresses = (
  addresses: ChecksummedAddress[]
): ChecksummedAddress[] => {
  return useMemo(() => {
    const deduped = new Set(addresses);
    return [...deduped];
  }, [addresses]);
};

export const useContractsMetadata = (
  addresses: ChecksummedAddress[],
  provider: JsonRpcProvider | undefined,
  baseMetadatas?: Record<string, Metadata | null>
) => {
  const deduped = useDedupedAddresses(addresses);
  const contracts = useAddressesWithCode(provider, deduped);
  const { sourcifySource } = useAppConfigContext();
  const metadatas = useMultipleMetadata(
    baseMetadatas,
    contracts,
    provider?.network.chainId,
    sourcifySource
  );

  return metadatas;
};