Move the VAPID public key encoding into a serde-compatible encoding module.

The [Serde attribute docs][serde-attr] don't spell out that this will work, but experimentally, it looks like a module used with `#[serde(with)]` only needs to have the `encode`/`decode` functions if they're actually used, and can be "incomplete" if the missing ones are also unused in your code. That's the case here: we serialize VAPID keys, but never deserialize them.

[serde-attr]: https://serde.rs/field-attrs.html#with

This improves organization a bit in my view, but more importantly it also sets us up for a coming change where we _will_ start deserializing VAPID keys, and where I'd like to use the same logic: giving it its own module will make that easier to organize.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/vapid/mod.rs b/src/vapid/mod.rs
index 9798654..364f602 100644
--- a/src/vapid/mod.rs
+++ b/src/vapid/mod.rs
@@ -3,6 +3,7 @@ pub mod event;
 mod history;
 mod middleware;
 pub mod repo;
+pub mod ser;
 
 pub use event::Event;
 pub use history::History;