/// An opaque pointer which is passed to your function implementations as an argument.
/// This has no meaning in the LDK, and can be NULL or any other value.
pub this_arg: *mut c_void,
- /// Get node secret key (aka node_id or network_key) based on the provided [`Recipient`].
+ /// Get node secret key based on the provided [`Recipient`].
+ ///
+ /// The node_id/network_key is the public key that corresponds to this secret key.
///
/// This method must return the same value each time it is called with a given `Recipient`
/// parameter.