Function save_encrypted_config 

pub fn save_encrypted_config(
    config: &SerializableConfig,
    passphrase: &str,
) -> Result<(), String>

Saves the given configuration to an encrypted file using the provided passphrase.

Encrypts the config and writes it to both the primary file (secrets.enc) and a backup (backups/secrets.enc.backup). The backup directory is created automatically if it doesn’t exist. The backup is written first to ensure a valid copy exists even if the primary write fails.

Arguments

• config - The configuration to save.
• passphrase - The passphrase used to encrypt the configuration.

Returns

A Result indicating success or failure, with an error message as a String on failure.

Errors

Returns an error if:

• Serialization of the config fails
• Encryption fails
• The backups directory cannot be created
• Either the backup or primary file cannot be written

Example

let config = SerializableConfig { ... };
save_encrypted_config(&config, "my_secure_passphrase").expect("Failed to save encrypted config");