fix(bridge-ui): selecting chain was not informing of errors

packages/bridge-ui/package.json

@@ -22,6 +22,7 @@
     "@babel/preset-env": "^7.16.0",
     "@sveltejs/vite-plugin-svelte": "^1.0.1",
     "@tsconfig/svelte": "^3.0.0",
+    "@types/debug": "^4.1.7",
     "@types/eslint": "^8.2.1",
     "@types/estree": "^0.0.50",
     "@types/jest": "^27.0.2",
@@ -75,6 +76,7 @@
     "@wagmi/core": "^0.8.0",
     "axios": "^1.2.0",
     "buffer": "^6.0.3",
+    "debug": "^4.3.4",
     "ethers": "^5.7.1",
     "identicon.js": "^2.3.3",
     "svelte-i18n": "^3.5.1",

packages/bridge-ui/src/components/ChainDropdown.svelte

@@ -1,26 +1,25 @@
 <script lang="ts">
-  import { fromChain, toChain } from '../store/chain';
-  import type { Chain } from '../domain/chain';
-  import { ethers } from 'ethers';
-  import { signer } from '../store/signer';
-  import { switchNetwork } from '@wagmi/core';
+  import { fromChain } from '../store/chain';
   import { ChevronDown, ExclamationTriangle } from 'svelte-heros-v2';
   import { mainnetChain, taikoChain } from '../chain/chains';
+  import { selectChain } from '../utils/selectChain';
+  import type { Chain } from '../domain/chain';
+  import { errorToast, successToast } from './Toast.svelte';
+  import { signer } from '../store/signer';
 
-  const changeChain = async (chain: Chain) => {
-    await switchNetwork({
-      chainId: chain.id,
-    });
-    const provider = new ethers.providers.Web3Provider(window.ethereum, 'any');
-    await provider.send('eth_requestAccounts', []);
+  const switchChains = async (chain: Chain) => {
+    if (!$signer) {
+      errorToast('Please connect your wallet');
+      return;
+    }
 
-    fromChain.set(chain);
-    if (chain === mainnetChain) {
-      toChain.set(taikoChain);
-    } else {
-      toChain.set(mainnetChain);
+    try {
+      await selectChain(chain);
+      successToast('Successfully changed chain');
+    } catch (e) {
+      console.error(e);
+      errorToast('Error switching chain');
     }
-    signer.set(provider.getSigner());
   };
 </script>
 
@@ -50,19 +49,15 @@
     <li>
       <button
         class="flex items-center px-2 py-4 hover:bg-dark-5 rounded-xl justify-around"
-        on:click={async () => {
-          await changeChain(mainnetChain);
-        }}>
+        on:click={() => switchChains(mainnetChain)}>
         <svelte:component this={mainnetChain.icon} height={24} />
         <span class="pl-1.5 text-left flex-1">{mainnetChain.name}</span>
       </button>
     </li>
     <li>
       <button
         class="flex items-center px-2 py-4 hover:bg-dark-5 rounded-xl justify-around"
-        on:click={async () => {
-          await changeChain(taikoChain);
-        }}>
+        on:click={() => switchChains(taikoChain)}>
         <svelte:component this={taikoChain.icon} height={24} />
         <span class="pl-1.5 text-left flex-1">{taikoChain.name}</span>
       </button>

packages/bridge-ui/src/components/Transactions/Transaction.svelte

@@ -25,7 +25,7 @@
   import { tokenVaults } from '../../vault/tokenVaults';
   import { isOnCorrectChain } from '../../utils/isOnCorrectChain';
   import Button from '../buttons/Button.svelte';
-  import { switchChainAndSetSigner } from '../../utils/switchChainAndSetSigner';
+  import { selectChain } from '../../utils/selectChain';
   import type { NoticeOpenArgs } from '../../domain/modal';
 
   export let transaction: BridgeTransaction;
@@ -81,7 +81,7 @@
       // to the right network.
       if ($fromChain.id !== bridgeTx.toChainId) {
         const chain = chains[bridgeTx.toChainId];
-        await switchChainAndSetSigner(chain);
+        await selectChain(chain);
       }
 
       // confirm after switch chain that it worked.
@@ -133,7 +133,7 @@
       loading = true;
       if (txFromChain.id !== bridgeTx.fromChainId) {
         const chain = chains[bridgeTx.fromChainId];
-        await switchChainAndSetSigner(chain);
+        await selectChain(chain);
       }
 
       // confirm after switch chain that it worked.

packages/bridge-ui/src/components/form/SelectChain.svelte

@@ -3,31 +3,20 @@
   import { ArrowRight } from 'svelte-heros-v2';
   import { fromChain, toChain } from '../../store/chain';
   import { signer } from '../../store/signer';
-  import { ethers } from 'ethers';
   import { mainnetChain, taikoChain } from '../../chain/chains';
   import { errorToast, successToast } from '../Toast.svelte';
+  import { selectChain } from '../../utils/selectChain';
 
   const toggleChains = async () => {
     if (!$signer) {
       errorToast('Please connect your wallet');
       return;
     }
 
-    try {
-      const chain = $fromChain === mainnetChain ? taikoChain : mainnetChain;
-      await switchNetwork({
-        chainId: chain.id,
-      });
-      const provider = new ethers.providers.Web3Provider(
-        window.ethereum,
-        'any',
-      );
-      await provider.send('eth_requestAccounts', []);
-
-      fromChain.set(chain);
-      toChain.set(chain === mainnetChain ? taikoChain : mainnetChain);
+    const chain = $fromChain === mainnetChain ? taikoChain : mainnetChain;
 
-      signer.set(provider.getSigner());
+    try {
+      await selectChain(chain);
       successToast('Successfully changed chain');
     } catch (e) {
       console.error(e);

packages/bridge-ui/src/proof/ProofService.spec.ts

@@ -1,4 +1,4 @@
-import { BigNumber, ethers } from 'ethers';
+import { ethers } from 'ethers';
 import type { EthGetProofResponse } from '../domain/proof';
 import { ProofService } from './ProofService';
 

packages/bridge-ui/src/utils/logger.ts

@@ -0,0 +1,5 @@
+import debug from 'debug';
+
+export function getLogger(namesapce: string) {
+  return debug(`bridge:${namesapce}`);
+}

packages/bridge-ui/src/utils/selectChain.spec.ts

@@ -0,0 +1,74 @@
+import { switchNetwork } from '@wagmi/core';
+import { Signer, ethers } from 'ethers';
+import { fromChain, toChain } from '../store/chain';
+import { signer } from '../store/signer';
+import { mainnetChain, taikoChain } from '../chain/chains';
+import { selectChain } from './selectChain';
+
+jest.mock('../constants/envVars');
+
+jest.mock('@wagmi/core', () => ({
+  switchNetwork: jest.fn(),
+}));
+
+jest.mock('ethers', () => {
+  const Web3Provider = jest.fn();
+  Web3Provider.prototype = {
+    getSigner: jest.fn(),
+    send: jest.fn(),
+  };
+  return {
+    ethers: {
+      providers: {
+        Web3Provider,
+      },
+    },
+  };
+});
+
+jest.mock('../store/chain', () => ({
+  fromChain: {
+    set: jest.fn(),
+  },
+  toChain: {
+    set: jest.fn(),
+  },
+}));
+
+jest.mock('../store/signer', () => ({
+  signer: {
+    set: jest.fn(),
+  },
+}));
+
+describe('selectChain', () => {
+  it('should select chain', async () => {
+    const mockSigner = {} as ethers.providers.JsonRpcSigner;
+    jest
+      .mocked(ethers.providers.Web3Provider.prototype.getSigner)
+      .mockReturnValue(mockSigner);
+
+    await selectChain(mainnetChain);
+
+    expect(switchNetwork).toHaveBeenCalledWith({ chainId: mainnetChain.id });
+    expect(fromChain.set).toHaveBeenCalledWith(mainnetChain);
+    expect(toChain.set).toHaveBeenCalledWith(taikoChain);
+    expect(signer.set).toHaveBeenCalled();
+
+    expect(ethers.providers.Web3Provider.prototype.send).toHaveBeenCalledWith(
+      'eth_requestAccounts',
+      [],
+    );
+
+    expect(
+      ethers.providers.Web3Provider.prototype.getSigner,
+    ).toHaveBeenCalled();
+
+    expect(signer.set).toHaveBeenCalledWith(mockSigner);
+
+    // Select the other chain now
+    await selectChain(taikoChain);
+
+    expect(switchNetwork).toHaveBeenCalledWith({ chainId: taikoChain.id });
+  });
+});

packages/bridge-ui/src/utils/switchChainAndSetSigner.ts → packages/bridge-ui/src/utils/selectChain.ts

@@ -1,11 +1,14 @@
-import { fetchSigner, switchNetwork } from '@wagmi/core';
+import { switchNetwork } from '@wagmi/core';
 import { ethers } from 'ethers';
 import { fromChain, toChain } from '../store/chain';
 import type { Chain } from '../domain/chain';
 import { mainnetChain, taikoChain } from '../chain/chains';
 import { signer } from '../store/signer';
+import { getLogger } from '../utils/logger';
 
-export async function switchChainAndSetSigner(chain: Chain) {
+const log = getLogger('selectChain');
+
+export async function selectChain(chain: Chain) {
   const chainId = chain.id;
 
   await switchNetwork({ chainId });
@@ -14,7 +17,11 @@ export async function switchChainAndSetSigner(chain: Chain) {
     globalThis.ethereum,
     'any',
   );
-  await provider.send('eth_requestAccounts', []);
+
+  // Requires requesting permission to connect users accounts
+  const accounts = await provider.send('eth_requestAccounts', []);
+
+  log('accounts', accounts);
 
   fromChain.set(chain);
   if (chain.id === mainnetChain.id) {
@@ -23,7 +30,9 @@ export async function switchChainAndSetSigner(chain: Chain) {
     toChain.set(mainnetChain);
   }
 
-  const wagmiSigner = await fetchSigner({ chainId });
+  const _signer = provider.getSigner();
+
+  log('signer', _signer);
 
-  signer.set(wagmiSigner);
+  signer.set(_signer);
 }