When switchChain fails (user rejection, network error, RPC timeout), the change event listener registered on the connector's emitter is never removed.
What's happening
In packages/connectors/src/walletConnect.ts, the implementation registers a listener to wait for the chain-changed confirmation:
```typescript
config.emitter.on('change', listener)
```
This runs concurrently with the wallet_switchEthereumChain request inside Promise.all. When the request rejects, Promise.all propagates the rejection to the catch block, but the listener stays attached. There's no cleanup on the error path.
Why it matters
Every failed switch attempt adds one orphaned listener to the connector's emitter. With mobile wallets via WalletConnect, rejections are common: user dismisses the prompt, wallet is backgrounded, connection drops. These pile up.
Reproduction
```typescript
// WalletConnect connector, any chain that prompts a switch
for (let i = 0; i < 5; i++) {
await connector.switchChain({ chainId: 1 }).catch(() => {})
}
console.log(connector.emitter.listenerCount('change')) // 5, not 0
```
Environment
@wagmi/connectors: 8.x- WalletConnect v2, mobile wallet (iOS/Android)
When
switchChainfails (user rejection, network error, RPC timeout), thechangeevent listener registered on the connector's emitter is never removed.What's happening
In
packages/connectors/src/walletConnect.ts, the implementation registers a listener to wait for the chain-changed confirmation:```typescript
config.emitter.on('change', listener)
```
This runs concurrently with the
wallet_switchEthereumChainrequest insidePromise.all. When the request rejects,Promise.allpropagates the rejection to thecatchblock, but the listener stays attached. There's no cleanup on the error path.Why it matters
Every failed switch attempt adds one orphaned listener to the connector's emitter. With mobile wallets via WalletConnect, rejections are common: user dismisses the prompt, wallet is backgrounded, connection drops. These pile up.
Reproduction
```typescript
// WalletConnect connector, any chain that prompts a switch
for (let i = 0; i < 5; i++) {
await connector.switchChain({ chainId: 1 }).catch(() => {})
}
console.log(connector.emitter.listenerCount('change')) // 5, not 0
```
Environment
@wagmi/connectors: 8.x