feat(connectors): filter mipd by connector rdns

.changeset/curly-yaks-sin.md

@@ -0,0 +1,6 @@
+---
+"@wagmi/connectors": minor
+"@wagmi/core": minor
+---
+
+Added `rdns` property to connector interface. This is used to filter out duplicate [EIP-6963](https://eips.ethereum.org/EIPS/eip-6963) injected providers when [`createConfig#multiInjectedProviderDiscovery`](https://wagmi.sh/core/api/createConfig#multiinjectedproviderdiscovery) is enabled and `createConfig#connectors` already matches EIP-6963 providers' `rdns` property.

packages/connectors/src/coinbaseWallet.ts

@@ -89,6 +89,7 @@ function version4(parameters: Version4Parameters) {
   return createConnector<Provider>((config) => ({
     id: 'coinbaseWalletSDK',
     name: 'Coinbase Wallet',
+    rdns: 'com.coinbase.wallet',
     supportsSimulation: true,
     type: coinbaseWallet.type,
     async connect({ chainId } = {}) {

packages/connectors/src/metaMask.ts

@@ -93,12 +93,22 @@ export function metaMask(parameters: MetaMaskParameters = {}) {
   return createConnector<Provider, Properties>((config) => ({
     id: 'metaMaskSDK',
     name: 'MetaMask',
+    rdns: 'io.metamask',
     type: metaMask.type,
     async setup() {
       const provider = await this.getProvider()
-      if (provider && !connect) {
-        connect = this.onConnect.bind(this)
-        provider.on('connect', connect as Listener)
+      if (provider?.on) {
+        if (!connect) {
+          connect = this.onConnect.bind(this)
+          provider.on('connect', connect as Listener)
+        }
+
+        // We shouldn't need to listen for `'accountsChanged'` here since the `'connect'` event should suffice (and wallet shouldn't be connected yet).
+        // Some wallets, like MetaMask, do not implement the `'connect'` event and overload `'accountsChanged'` instead.
+        if (!accountsChanged) {
+          accountsChanged = this.onAccountsChanged.bind(this)
+          provider.on('accountsChanged', accountsChanged as Listener)
+        }
       }
     },
     async connect({ chainId, isReconnecting } = {}) {
@@ -193,10 +203,6 @@ export function metaMask(parameters: MetaMaskParameters = {}) {
       const provider = await this.getProvider()
 
       // Manage EIP-1193 event listeners
-      if (accountsChanged) {
-        provider.removeListener('accountsChanged', accountsChanged)
-        accountsChanged = undefined
-      }
       if (chainChanged) {
         provider.removeListener('chainChanged', chainChanged)
         chainChanged = undefined
@@ -257,7 +263,7 @@ export function metaMask(parameters: MetaMaskParameters = {}) {
             parameters.dappMetadata ??
             (typeof window !== 'undefined'
               ? { url: window.location.origin }
-              : { name: 'wagmi' }),
+              : { name: 'wagmi', url: 'https://wagmi.sh' }),
           useDeeplink: parameters.useDeeplink ?? true,
         })
         await sdk.init()
@@ -440,10 +446,6 @@ export function metaMask(parameters: MetaMaskParameters = {}) {
       config.emitter.emit('disconnect')
 
       // Manage EIP-1193 event listeners
-      if (!accountsChanged) {
-        accountsChanged = this.onAccountsChanged.bind(this)
-        provider.on('accountsChanged', accountsChanged as Listener)
-      }
       if (chainChanged) {
         provider.removeListener('chainChanged', chainChanged)
         chainChanged = undefined

packages/core/src/connectors/createConnector.ts

@@ -37,6 +37,7 @@ export type CreateConnectorFn<
     readonly icon?: string | undefined
     readonly id: string
     readonly name: string
+    readonly rdns?: string | undefined
     readonly supportsSimulation?: boolean | undefined
     readonly type: string
 

packages/core/src/createConfig.test.ts

@@ -1,10 +1,16 @@
 import { accounts, chain, wait } from '@wagmi/test'
+import {
+  type EIP1193Provider,
+  type EIP6963ProviderDetail,
+  announceProvider,
+} from 'mipd'
 import { http } from 'viem'
 import { expect, test, vi } from 'vitest'
 
 import { connect } from './actions/connect.js'
 import { disconnect } from './actions/disconnect.js'
 import { switchChain } from './actions/switchChain.js'
+import { createConnector } from './connectors/createConnector.js'
 import { mock } from './connectors/mock.js'
 import { createConfig } from './createConfig.js'
 import { createStorage } from './createStorage.js'
@@ -346,10 +352,86 @@ test('behavior: setup connector', async () => {
 
   await connect(config, {
     chainId: mainnet.id,
-    connector: config.connectors[0]!,
+    connector: config.connectors.find((x) => x.uid === connector.uid)!,
   })
 
   expect(config.state.current).toBe(connector.uid)
 
   await disconnect(config)
 })
+
+test('behavior: eip 6963 providers', async () => {
+  const detail_1 = getProviderDetail({ name: 'Foo Wallet', rdns: 'com.foo' })
+  const detail_2 = getProviderDetail({ name: 'Bar Wallet', rdns: 'com.bar' })
+  const detail_3 = getProviderDetail({ name: 'Mock', rdns: 'com.mock' })
+
+  const config = createConfig({
+    chains: [mainnet],
+    connectors: [
+      createConnector((c) => {
+        return {
+          ...mock({ accounts })(c),
+          rdns: 'com.mock',
+        }
+      }),
+    ],
+    transports: {
+      [mainnet.id]: http(),
+    },
+  })
+
+  await wait(100)
+  announceProvider(detail_1)()
+  await wait(100)
+  announceProvider(detail_1)()
+  await wait(100)
+  announceProvider(detail_2)()
+  await wait(100)
+  announceProvider(detail_3)()
+  await wait(100)
+
+  expect(config.connectors.map((x) => x.rdns ?? x.id)).toMatchInlineSnapshot(`
+    [
+      "com.mock",
+      "com.example",
+      "com.foo",
+      "com.bar",
+    ]
+  `)
+})
+
+function getProviderDetail(
+  info: Pick<EIP6963ProviderDetail['info'], 'name' | 'rdns'>,
+): EIP6963ProviderDetail {
+  return {
+    info: {
+      icon: 'data:image/svg+xml,<svg width="32px" height="32px" viewBox="0 0 32 32"/>',
+      uuid: crypto.randomUUID(),
+      ...info,
+    },
+    provider: `<EIP1193Provider_${info.rdns}>` as unknown as EIP1193Provider,
+  }
+}
+
+vi.mock(import('mipd'), async (importOriginal) => {
+  const mod = await importOriginal()
+
+  let _cache: typeof mod | undefined
+  if (!_cache)
+    _cache = {
+      ...mod,
+      createStore() {
+        const store = mod.createStore()
+        return {
+          ...store,
+          getProviders() {
+            return [
+              getProviderDetail({ name: 'Example', rdns: 'com.example' }),
+              getProviderDetail({ name: 'Mock', rdns: 'com.mock' }),
+            ]
+          },
+        }
+      },
+    }
+  return _cache
+})

packages/core/src/createConfig.ts

@@ -92,14 +92,23 @@ export function createConfig<
       : undefined
 
   const chains = createStore(() => rest.chains)
-  const connectors = createStore(() =>
-    [
-      ...(rest.connectors ?? []),
-      ...(!ssr
-        ? (mipd?.getProviders().map(providerDetailToConnector) ?? [])
-        : []),
-    ].map(setup),
-  )
+  const connectors = createStore(() => {
+    const collection = []
+    const rdnsSet = new Set<string>()
+    for (const connectorFns of rest.connectors ?? []) {
+      const connector = setup(connectorFns)
+      collection.push(connector)
+      if (!ssr && connector.rdns) rdnsSet.add(connector.rdns)
+    }
+    if (!ssr && mipd) {
+      const providers = mipd.getProviders()
+      for (const provider of providers) {
+        if (rdnsSet.has(provider.info.rdns)) continue
+        collection.push(setup(providerDetailToConnector(provider)))
+      }
+    }
+    return collection
+  })
   function setup(connectorFn: CreateConnectorFn): Connector {
     // Set up emitter with uid and add to connector so they are "linked" together.
     const emitter = createEmitter<ConnectorEventMap>(uid())
@@ -313,15 +322,18 @@ export function createConfig<
 
   // EIP-6963 subscribe for new wallet providers
   mipd?.subscribe((providerDetails) => {
-    const currentConnectorIds = new Map()
+    const connectorIdSet = new Set()
+    const connectorRdnsSet = new Set()
     for (const connector of connectors.getState()) {
-      currentConnectorIds.set(connector.id, true)
+      connectorIdSet.add(connector.id)
+      if (connector.rdns) connectorRdnsSet.add(connector.rdns)
     }
 
     const newConnectors: Connector[] = []
     for (const providerDetail of providerDetails) {
+      if (connectorRdnsSet.has(providerDetail.info.rdns)) continue
       const connector = setup(providerDetailToConnector(providerDetail))
-      if (currentConnectorIds.has(connector.id)) continue
+      if (connectorIdSet.has(connector.id)) continue
       newConnectors.push(connector)
     }
 

packages/core/src/hydrate.ts

@@ -23,14 +23,24 @@ export function hydrate(config: Config, parameters: HydrateParameters) {
     async onMount() {
       if (config._internal.ssr) {
         await config._internal.store.persist.rehydrate()
-        const mipdConnectors = config._internal.mipd
-          ?.getProviders()
-          .map(config._internal.connectors.providerDetailToConnector)
-          .map(config._internal.connectors.setup)
-        config._internal.connectors.setState((connectors) => [
-          ...connectors,
-          ...(mipdConnectors ?? []),
-        ])
+        if (config._internal.mipd) {
+          config._internal.connectors.setState((connectors) => {
+            const rdnsSet = new Set<string>()
+            for (const connector of connectors ?? []) {
+              if (connector.rdns) rdnsSet.add(connector.rdns)
+            }
+            const mipdConnectors = []
+            const providers = config._internal.mipd?.getProviders() ?? []
+            for (const provider of providers) {
+              if (rdnsSet.has(provider.info.rdns)) continue
+              const connectorFn =
+                config._internal.connectors.providerDetailToConnector(provider)
+              const connector = config._internal.connectors.setup(connectorFn)
+              mipdConnectors.push(connector)
+            }
+            return [...connectors, ...mipdConnectors]
+          })
+        }
       }
 
       if (reconnectOnMount) reconnect(config)

playgrounds/next/src/app/page.tsx

@@ -78,7 +78,7 @@ function Account() {
         status: {account.status}
       </div>
 
-      {account.status !== 'disconnected' && (
+      {account.status === 'connected' && (
         <button type="button" onClick={() => disconnect()}>
           Disconnect
         </button>

site/dev/creating-connectors.md

@@ -54,6 +54,7 @@ The type error tells you what properties are missing from `createConnector`'s re
 - `icon`: Optional icon URL for the connector.
 - `id`: The ID for the connector. This should be camel-cased and as short as possible. Example: `fooBarBaz`.
 - `name`: Human-readable name for the connector. Example: `'Foo Bar Baz'`.
+- `rdns`: Optional reverse DNS for the connector. This is used to filter out duplicate [EIP-6963](https://eips.ethereum.org/EIPS/eip-6963) injected providers when `createConfig#multiInjectedProviderDiscovery` is enabled.
 - `supportsSimulation`: Whether the connector supports contract simulation. This should be disabled if a connector's wallet cannot accurately simulate contract writes or display contract revert messages. Defaults to `false`.
 
 #### Methods