Function add_contact_and_establish_session_from_base64 

pub fn add_contact_and_establish_session_from_base64(
    bridge: &mut SignalBridge,
    bundle_base64: &str,
    user_alias: &str,
) -> Result<String, Box<dyn Error>>

Adds a contact from a base64-encoded bundle and establishes a session

Arguments

• bridge - Signal bridge instance
• bundle_base64 - Base64-encoded prekey bundle
• user_alias - Optional user-assigned alias

Returns

RDX fingerprint of the added contact