Function add_contact_and_establish_session 

pub fn add_contact_and_establish_session(
    bridge: &mut SignalBridge,
    bundle_bytes: &[u8],
    user_alias: &str,
) -> Result<String, Box<dyn Error>>

Adds a contact from a bundle and establishes a session

Arguments

• bridge - Signal bridge instance
• bundle_bytes - Serialized prekey bundle
• user_alias - Optional user-assigned alias

Returns

RDX fingerprint of the added contact