pub trait CertManager: Send + Sync {
// Required methods
fn get_ca_cert(&self) -> Result<Vec<u8>>;
fn get_ca_key(&self) -> Result<SecretKey>;
fn get_ca_public_key(&self) -> Result<Vec<u8>>;
fn get_user_cert(&self, id: u64) -> Result<Vec<u8>>;
fn get_user_key(&self, id: u64) -> Result<SecretKey>;
fn get_fabric_id(&self) -> u64;
}