Function signSIWxMessage

signSIWxMessage(
    message: string,
    signer: SIWxSigner,
    options?: {
        signatureScheme?: SignatureScheme;
        serverInfo?: SIWxExtensionInfo;
    },
): Promise<string>
Signs a SIWx message using the provided signer.
Parameters
- message: string
  CAIP-122 formatted message to sign
- signer: SIWxSigner
  Wallet/signer interface with signMessage
- Optionaloptions: { signatureScheme?: SignatureScheme; serverInfo?: SIWxExtensionInfo }
  Signing options
  - OptionalsignatureScheme?: SignatureScheme
    Signature scheme to use
  - OptionalserverInfo?: SIWxExtensionInfo
    Server info for verification
Returns Promise<string>
Hex-encoded signature
Example
```
const signature = await signSIWxMessage(message, wallet, {
  signatureScheme: 'eip191'
});
```
- Defined in extensions/src/sign-in-with-x/client.ts:153