Web3Modal uses wrong session when selecting a different chain

[marctatham]

Describe the bug
Web3Modal determines the session by simply grabbing the first available session from getSessions(). This works when the only session is the connected wallet, it does NOT work when we are managing multiple sessions (such as in the case when you are using both Web3Modal to connect a wallet and connecting dApps as well)

SDK Version

• Client: iOS-Swift
• Version All versions, including latest version 1.5.2

To Reproduce

1. Connect a wallet using web3modal
2. Connect a dApp to the same application using Pair.instance.pair(...)
3. Attempt to change network using Web3Modal.selectChain() , this will fail as the requests are being routed to the wrong session

Expected behaviour
The change network request should be sent to the wallet session. The web3Modal should manage its connected wallet session correctly.

Screenshots
N/A

Device:

• Device: iPhoneXR
• OS: iOS 17.5.1
• Browser N/A
• Version: 1.3.1 web3modal SDK, however this issue can be found in the latest version as well

Additional context
The exact problem can be found in how the session is determined here:

web3modal-swift/Sources/Web3Modal/Core/Web3Modal.swift

Lines 37 to 48 in 2d94ebc

	if let session = client.getSessions().first {
	store.session = session
	store.connectedWith = .wc
	store.account = .init(from: session)
	} else if CoinbaseWalletSDK.shared.isConnected() {
	let storedAccount = AccountStorage.read()
	store.connectedWith = .cb
	store.account = storedAccount
	} else {
	AccountStorage.clear()
	}

[mrktrace]

Good morning,

I'm experiencing the same issue, I think it would be super useful to be able to perform web3 options sending a the sessionId.

Maybe it could be an optional string with a default nil value, and if the topicId is nil it could use the first session.

WDYT?

Thank you!