Support ENS names (#159)

* Add ENS support

config.ts

@@ -1,6 +1,6 @@
-import { goerli, optimismGoerli } from 'wagmi/chains';
+import { goerli, optimismGoerli, mainnet } from 'wagmi/chains';
 
-export const chains = [goerli, optimismGoerli];
+export const chains = [goerli, optimismGoerli, mainnet];
 
 export enum DaoId {
   PoolTogether = 'pool-together',

hooks/useL2Delegate.ts

@@ -6,9 +6,10 @@ import { parseAbi } from 'viem';
 
 type Props = {
   delegatorAddress?: `0x${string}`;
+  enabled?: boolean;
 };
 
-export const useL2Delegate = ({ delegatorAddress }: Props) => {
+export const useL2Delegate = ({ delegatorAddress, enabled }: Props) => {
   let { address } = useAccount();
   if (delegatorAddress !== undefined) {
     address = delegatorAddress;
@@ -23,6 +24,8 @@ export const useL2Delegate = ({ delegatorAddress }: Props) => {
     functionName: 'delegates',
     args: [address],
     chainId: l2.chain.id,
+    watch: true,
+    enabled: enabled,
   });
   return { data, error, isLoading };
 };

pages/[id]/delegate.tsx

@@ -5,7 +5,7 @@ import { InformationCircleIcon } from '@heroicons/react/24/outline';
 import type { NextPage } from 'next';
 import Head from 'next/head';
 import Image from 'next/image';
-import { useAccount, useNetwork, useWalletClient } from 'wagmi';
+import { useAccount, useEnsAvatar, useEnsName, useNetwork, useWalletClient } from 'wagmi';
 import { isAddress, formatUnits } from 'viem';
 import { useForm } from 'react-hook-form';
 import { useBalances } from '@/hooks/useBalances';
@@ -18,6 +18,7 @@ import { ZERO_ADDRESS } from '@/util/constants';
 import CardWithHeader from '@/components/CardWithHeader';
 import Spinner from '@/components/Spinner';
 import { switchChain } from '@/util';
+import { getEnsAddress } from '@/util/ens';
 import { Tooltip } from 'react-tooltip';
 import { useTokenInfo } from '@/hooks/useTokenInfo';
 import { ConnectButton } from '@rainbow-me/rainbowkit';
@@ -35,7 +36,6 @@ const Delegate: NextPage = () => {
   const { data: walletClient, isLoading: walletIsLoading } = useWalletClient();
   const { chain } = useNetwork();
   const [delegateAddress, setDelegateAddress] = useState(address);
-  const { data: delegatee } = useL2Delegate({});
   const { data: l2VotingWeight } = useL2CurrentVotingWeight({
     voterAddress: address || ZERO_ADDRESS,
   });
@@ -47,8 +47,11 @@ const Delegate: NextPage = () => {
   const {
     register,
     handleSubmit,
-    formState: { errors },
+    formState: { errors, isValid },
   } = useForm<FormData>({ mode: 'onChange' });
+  const { data: delegatee } = useL2Delegate({ enabled: isValid });
+  const { data: delegateEnsName } = useEnsName({ address: delegatee, chainId: 1 });
+  const { data: delegateEnsAvatar } = useEnsAvatar({ name: delegateEnsName, chainId: 1 });
 
   const l2VotingWeightFormatted = formatUnits(
     l2VotingWeight || BigInt(0),
@@ -147,7 +150,14 @@ const Delegate: NextPage = () => {
                     <div className="self-center font-mono">
                       {mounted && delegatee !== ZERO_ADDRESS ? (
                         <div className="flex items-start gap-1">
-                          {delegatee}{' '}
+                          {delegateEnsAvatar && (
+                            <img
+                              className="inline-block h-6 w-6 rounded-full"
+                              src={delegateEnsAvatar}
+                              alt=""
+                            />
+                          )}
+                          {delegateEnsName || delegatee}{' '}
                           <InformationCircleIcon
                             id="delegate-address-information"
                             className="h-4"
@@ -179,10 +189,18 @@ const Delegate: NextPage = () => {
                       aria-invalid="true"
                       aria-describedby="address-error"
                       {...register('delegateAddress', {
-                        onChange: (e) => {
-                          setDelegateAddress(e.target.value);
+                        onChange: async (e) => {
+                          const val = await getEnsAddress(e.target.value);
+                          setDelegateAddress(val || e.target.value);
                         },
                         validate: async (value) => {
+                          if (value?.includes('.eth')) {
+                            const val = await getEnsAddress(value);
+                            if (val !== null) {
+                              value = val;
+                            }
+                          }
+
                           const validAddress = isAddress(value);
                           const isBalanceNonzero = (l2.token?.value || BigInt(0)) > BigInt(0);
                           if (validAddress && isBalanceNonzero) return true;

util/ens.ts

@@ -0,0 +1,20 @@
+import { normalize } from 'viem/ens';
+import { createPublicClient, http } from 'viem';
+import { mainnet } from 'viem/chains';
+
+export const getEnsAddress = async (name: string) => {
+  const client = createPublicClient({
+    chain: mainnet,
+    transport: http(),
+  });
+  try {
+    const ensAddress = await client.getEnsAddress({
+      name: normalize(name),
+    });
+    return ensAddress;
+  } catch (e) {
+    const err = e as Error;
+    console.error(err.message);
+  }
+  return null;
+};