# \[Archive\] Wallet connect v2 Unable addChain or switchChain

**URL:** <https://builder.metamask.io/t/archive-wallet-connect-v2-unable-addchain-or-switchchain/1666>\
**Category:** Embedded Wallets (Web3Auth)\
**Created:** [December 14, 2023, 6:39am UTC](https://builder.metamask.io/t/archive-wallet-connect-v2-unable-addchain-or-switchchain/1666 "2023-12-14T06:39:35Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![Abigail](https://avatars.discourse-cdn.com/v4/letter/a/a587f6/32.png) [@Abigail](https://builder.metamask.io/u/Abigail)\
**Post date:** [December 14, 2023, 6:39am UTC](https://builder.metamask.io/t/archive-wallet-connect-v2-unable-addchain-or-switchchain/1666/1 "2023-12-14T06:39:35Z")

</div>

> **🏛 Archived Content from Web3Auth Community**
> 
> This topic was originally posted by **Abigail** on 12/14/2023.  
> This content has been migrated from our previous community forum to preserve valuable discussions.

* * *

- SDK Version: “@web3auth/base”: “^7.1.0”, “@web3auth/wallet-connect-v2-adapter”: “^7.1.1”, “@walletconnect/modal”: “^2.6.2”
- Platform: Mobile Chrome/Safari（PWA）

Unable to addChain or switchChain, is it supported?  
`connectTo(WALLET_ADAPTERS.WALLET_CONNECT_V2, {})` is fine, but addChain or switchChain,all unable open wallet, how do i?

Also web3auth.authenticateUser(), unable open wallet to sign, any ideas?

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<div class="post-metadata">

**Author:** ![vjgee](https://avatars.discourse-cdn.com/v4/letter/v/b5e925/32.png) [@vjgee](https://builder.metamask.io/u/vjgee)\
**Post date:** [December 14, 2023, 7:26am UTC](https://builder.metamask.io/t/archive-wallet-connect-v2-unable-addchain-or-switchchain/1666/2 "2023-12-14T07:26:24Z")

</div>

@Abigail Welcome Aboard!

Could you share your implementation code and which example you are using to guide your code?

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<div class="post-metadata">

**Author:** ![Abigail](https://avatars.discourse-cdn.com/v4/letter/a/a587f6/32.png) [@Abigail](https://builder.metamask.io/u/Abigail)\
**Post date:** [December 15, 2023, 6:57am UTC](https://builder.metamask.io/t/archive-wallet-connect-v2-unable-addchain-or-switchchain/1666/3 "2023-12-15T06:57:49Z")

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Hello it is my code.

Init

```auto
// VITE_CHAIN_ID='0xaa37dc'
// VITE_RPC_TARGET='https://sepolia.optimism.io'
// VITE_DISPLAY_NAME='OP Sepolia'
// VITE_BLOCK_EXPLORER='https://sepolia-optimistic.etherscan.io'
// VITE_TICKER='ETH'
// VITE_TICKER_NAME='OP Sepolia'
const web3AuthNetwork = config.VITE_WEB3AUTH_NETWORK
const chainConfig = {
chainNamespace: CHAIN_NAMESPACES.EIP155,
chainId: config.VITE_CHAIN_ID,
rpcTarget: config.VITE_RPC_TARGET,
displayName: config.VITE_DISPLAY_NAME,
blockExplorer: config.VITE_BLOCK_EXPLORER,
ticker: config.VITE_TICKER,
tickerName: config.VITE_TICKER_NAME,
}
const w3a = new Web3AuthNoModal({
clientId,
web3AuthNetwork,
chainConfig,
sessionTime: 86400, // 24 hours
})
const defaultWcSettings = await getWalletConnectV2Settings(
CHAIN_NAMESPACES.EIP155,
[parseInt(config.VITE_CHAIN_ID, 16)],
config.VITE_WALLETCONNECT_PROJECT_ID
)
const walletConnectModal = new WalletConnectModal({
projectId: config.VITE_WALLETCONNECT_PROJECT_ID,
})
const walletConnectV2Adapter = new WalletConnectV2Adapter({
adapterSettings: {
qrcodeModal: walletConnectModal,
…defaultWcSettings.adapterSettings,
},
loginSettings: { …defaultWcSettings.loginSettings },
})

```

Connect.

```auto
   async walletConnectV2Login() {
      await w3a.connectTo(WALLET_ADAPTERS.WALLET_CONNECT_V2, {})
      await w3a.addChain({
          decimals: 18,
          chainNamespace: CHAIN_NAMESPACES.EIP155,
          chainId: config.VITE_CHAIN_ID,
          rpcTarget: config.VITE_RPC_TARGET,
          displayName: config.VITE_DISPLAY_NAME,
          blockExplorer: config.VITE_BLOCK_EXPLORER,
          ticker: config.VITE_TICKER,
          tickerName: config.VITE_TICKER_NAME,
       })
      // await w3a.switchChain({chainId: config.VITE_CHAIN_ID})
      // await w3a.authenticateUser()
    }

```

I connect to metamask(connectTo). It’s fine.But w3a.addChain() not switch to the metamask and nothing happens. Did I write something wrong somewhere?

---

<div class="post-metadata">

**Author:** ![vjgee](https://avatars.discourse-cdn.com/v4/letter/v/b5e925/32.png) [@vjgee](https://builder.metamask.io/u/vjgee)\
**Post date:** [December 15, 2023, 7:40am UTC](https://builder.metamask.io/t/archive-wallet-connect-v2-unable-addchain-or-switchchain/1666/4 "2023-12-15T07:40:10Z")

</div>

Your issue has been forwarded to our team and we will get back with an update.