feat: MetaMask Connect

.eslintrc.js

@@ -19,6 +19,7 @@ module.exports = {
     {
       files: ['src/**/*.js'],
       parserOptions: {
+        ecmaVersion: 2020,
         sourceType: 'module',
       },
     },

.gitignore

@@ -4,3 +4,4 @@ node_modules
 dist
 .eslintcache
 .DS_Store
+.worktrees

.nvmrc

@@ -1 +1 @@
-v18
+v20.19.1

README.md

@@ -22,7 +22,7 @@ It can be used by navigating to `/request.html?method=${METHOD}&params=${PARAMS}
 
 ### Setup
 
-- Install [Node.js](https://nodejs.org) version 16
+- Install [Node.js](https://nodejs.org) version 20.19.0 or later
   - If you are using [nvm](https://github.com/creationix/nvm#installation) (recommended) running `nvm use` will automatically choose the right node version for you.
 - Install [Yarn v1](https://yarnpkg.com/en/docs/install)
 - Run `yarn setup` to install dependencies and run any required post-install scripts

package.json

@@ -3,7 +3,7 @@
   "version": "9.9.0",
   "description": "A simple dapp used in MetaMask e2e tests.",
   "engines": {
-    "node": ">= 18.0.0"
+    "node": ">=20.19.0"
   },
   "scripts": {
     "setup": "yarn install && yarn allow-scripts",
@@ -42,6 +42,7 @@
     "@lavamoat/allow-scripts": "^2.5.1",
     "@lavamoat/preinstall-always-fail": "^2.0.0",
     "@metamask/auto-changelog": "^2.5.0",
+    "@metamask/connect-evm": "^1.4.0",
     "@metamask/eslint-config": "^6.0.0",
     "@metamask/eslint-config-nodejs": "^6.0.0",
     "@metamask/eth-sig-util": "^7.0.1",

src/components/connections/connections.js

@@ -31,6 +31,10 @@ export function connectionsComponent(parentContainer) {
           >
           SDK Connect
           </button>
+          <button
+            class="btn btn-primary btn-lg btn-block mb-3"
+            id="connectEvm"
+          >MetaMask Connect</button>
           <hr />
           <button
             class="btn btn-primary btn-lg btn-block mb-3"
@@ -51,6 +55,7 @@ export function connectionsComponent(parentContainer) {
   const onboardButton = document.getElementById('connectButton');
   const walletConnectBtn = document.getElementById('walletConnect');
   const sdkConnectBtn = document.getElementById('sdkConnect');
+  const connectEvmBtn = document.getElementById('connectEvm');
   */
   const getAccounts = document.getElementById('getAccounts');
   const getAccountsResult = document.getElementById('getAccountsResult');

src/connect-evm.js

@@ -0,0 +1,130 @@
+import { createEVMClient } from '@metamask/connect-evm';
+import dappMetadata from './dapp-metadata';
+import globalContext, {
+  handleNewAccounts,
+  handleNewProviderDetail,
+  removeProviderDetail,
+  setActiveProviderDetail,
+  updateFormElements,
+} from '.';
+
+export const CONNECT_EVM_PROVIDER_NAME = 'connect-evm';
+export const CONNECT_EVM_PROVIDER_UUID = 'connect-evm';
+
+export const CONNECT_EVM_SUPPORTED_NETWORKS = {
+  '0x1': 'https://ethereum.publicnode.com',
+  '0xaa36a7': 'https://ethereum-sepolia.publicnode.com',
+  '0xa': 'https://optimism.publicnode.com',
+  '0x89': 'https://polygon-bor-rpc.publicnode.com',
+  '0x2105': 'https://base.publicnode.com',
+  '0xa4b1': 'https://arbitrum-one.publicnode.com',
+  '0xa86a': 'https://avalanche-c-chain-rpc.publicnode.com',
+  '0x38': 'https://bsc-dataseed.binance.org',
+  '0x539': 'http://127.0.0.1:8545',
+  '0x53a': 'http://127.0.0.1:8546',
+};
+
+export const CONNECT_EVM_CHAIN_IDS = Object.keys(
+  CONNECT_EVM_SUPPORTED_NETWORKS,
+);
+
+let connectEvmClientPromise;
+let connectEvmClient;
+let connectEvmProvider;
+
+const noop = () => undefined;
+
+async function getConnectEvmClient() {
+  if (!connectEvmClientPromise) {
+    connectEvmClientPromise = createEVMClient({
+      dapp: dappMetadata,
+      api: {
+        supportedNetworks: CONNECT_EVM_SUPPORTED_NETWORKS,
+      },
+    });
+  }
+
+  try {
+    connectEvmClient = await connectEvmClientPromise;
+    return connectEvmClient;
+  } catch (err) {
+    connectEvmClientPromise = undefined;
+    throw err;
+  }
+}
+
+function getConnectEvmProviderDetail(provider, name) {
+  return {
+    info: {
+      uuid: CONNECT_EVM_PROVIDER_UUID,
+      name,
+      icon: './sdk-connect.svg',
+      rdns: 'io.metamask',
+    },
+    provider,
+  };
+}
+
+function setConnectedButtonState(button) {
+  button.innerText = 'MetaMask Connect - Disconnect';
+  button.classList.remove('btn-primary');
+  button.classList.add('btn-danger');
+}
+
+function setDisconnectedButtonState(button) {
+  button.innerText = 'MetaMask Connect';
+  button.classList.add('btn-primary');
+  button.classList.remove('btn-danger');
+}
+
+export function isConnectEvmProvider(provider) {
+  return Boolean(provider && provider === connectEvmProvider);
+}
+
+export async function handleConnectEvm(
+  name,
+  button,
+  isConnected,
+  updateConnectionState = noop,
+) {
+  button.disabled = true;
+
+  try {
+    const client = await getConnectEvmClient();
+
+    if (isConnected) {
+      await client.disconnect();
+      updateConnectionState(false);
+      const activeProviderRemoved = removeProviderDetail(name);
+      setDisconnectedButtonState(button);
+      if (activeProviderRemoved) {
+        updateFormElements();
+      }
+      return;
+    }
+
+    const { accounts } = await client.connect({
+      chainIds: CONNECT_EVM_CHAIN_IDS,
+    });
+    const provider = client.getProvider();
+    connectEvmProvider = provider;
+
+    const providerDetail = getConnectEvmProviderDetail(provider, name);
+    await setActiveProviderDetail(providerDetail);
+    handleNewProviderDetail(providerDetail);
+    updateConnectionState(true);
+    setConnectedButtonState(button);
+    updateFormElements();
+    handleNewAccounts(accounts);
+    globalContext.connected = true;
+  } catch (err) {
+    console.error('Error connecting with MetaMask Connect EVM', err);
+    if (isConnected) {
+      setConnectedButtonState(button);
+    } else {
+      setDisconnectedButtonState(button);
+    }
+  } finally {
+    button.disabled = false;
+  }
+}

src/connections.js

@@ -1,4 +1,5 @@
 import { MetaMaskSDK } from '@metamask/sdk';
+import dappMetadata from './dapp-metadata';
 import globalContext, {
   handleNewAccounts,
   handleNewProviderDetail,
@@ -9,12 +10,6 @@ import globalContext, {
   updateWalletConnectState,
 } from '.';
 
-const dappMetadata = {
-  name: 'E2e Test Dapp',
-  description: 'This is the E2e Test Dapp',
-  url: 'https://metamask.github.io/test-dapp/',
-};
-
 const sdk = new MetaMaskSDK({ dappMetadata });
 
 export const initializeWeb3Modal = () => {
@@ -52,14 +47,15 @@ function _setProviderDetail(provider, name, uuid) {
 
 export async function handleSdkConnect(name, button, isConnected) {
   if (isConnected) {
-    handleNewAccounts([]);
-    updateFormElements();
     updateSdkConnectionState(false);
-    removeProviderDetail(name);
+    const activeProviderRemoved = removeProviderDetail(name);
     await sdk.terminate();
     button.innerText = 'Sdk Connect';
     button.classList.add('btn-primary');
     button.classList.remove('btn-danger');
+    if (activeProviderRemoved) {
+      updateFormElements();
+    }
   } else {
     await sdk.connect();
     const provider = sdk.getProvider();
@@ -87,14 +83,14 @@ export async function handleSdkConnect(name, button, isConnected) {
 
 export async function handleWalletConnect(name, button, isConnected) {
   if (isConnected) {
-    handleNewAccounts([]);
-    updateFormElements();
     updateWalletConnectState(false);
-    removeProviderDetail(name);
+    const activeProviderRemoved = removeProviderDetail(name);
     button.innerText = 'Wallet Connect';
     button.classList.add('btn-primary');
     button.classList.remove('btn-danger');
-    globalContext.connected = false;
+    if (activeProviderRemoved) {
+      updateFormElements();
+    }
   } else {
     const { provider } = walletConnect.getWalletProvider();
     const uuid = provider.signer.uri;
@@ -116,6 +112,6 @@ export async function handleWalletConnect(name, button, isConnected) {
     } catch (err) {
       console.error('Error on init when getting accounts', err);
     }
+    globalContext.connected = true;
   }
-  globalContext.connected = true;
 }

src/dapp-metadata.js

@@ -0,0 +1,7 @@
+const dappMetadata = {
+  name: 'E2e Test Dapp',
+  description: 'This is the E2e Test Dapp',
+  url: 'https://metamask.github.io/test-dapp/',
+};
+
+export default dappMetadata;