Generic struct or specialised struct implementing trait?

help
1

I'm working on my first Rust project, which will include a library.
In this library, I'm currently defining traits (eg AsfaloadSecretKey), and the goal is to have multiple structs (eg MinisignSecretKey) implement these traits (eg impl AsfaloadSecretKey for MinisignSecretKey).

I'm wondering if I should replace

struct MinisignSecretKey {
    key: minisign::SecretKey,
}

by

// Define generic struct at same level as trait
struct AsfaloadSecretKey<K> {
    key: K,
}
// Implement the trait for the specialised struct
impl AsfaloadSecretKey for AsfaloadSecretKey<minisign::SecretKey> {
//...
}

What are the up/downsides of my each approach? Does my current approach have limitations?
Could anyone share their experience?

Thanks in advance!

2

In the end I made the change in this commit.
Seems a positive change as code will now only manipulate the generic structs, and not structs specific to the implementation.