Class XChatSession

Whether the identity key required for conversation-key recovery is loaded.

Decrypt messages and recover conversation keys from key-change events.

Permanently release the session and its key material.

Clear private and cached key material while keeping the session reusable.

Replace the public signing keys used to verify incoming events.

Recover the account's private XChat keys from secure backup.

Create a locked session with identity, verification, and versioned caching configured.