OptionalchainsWalletConnect only: numeric chain ids offered to the wallet. Defaults to [1] (Ethereum mainnet).
'injected' for an EIP-6963 browser-extension wallet; 'walletconnect' for WalletConnect v2 (QR / deep link).
OptionalrdnsInjected only: the EIP-6963 rdns of the wallet to use. Defaults to 'io.metamask'.
Options for
UpbondClient.connectExternal().