Add supported quic versions.

Author: dvc94ch

README.md

@@ -62,6 +62,13 @@ Data:
   | responder-next-1rtt-key = SqueezeKey(32)
 ```
 
+## QUIC version
+
+Reserved versions for `quinn-noise` are `0xf0f0f2f[0-f]` [0]. Currently only `0xf0f0f2f0` is a
+valid `quinn-noise` version.
+
+- [0] https://github.com/quicwg/base-drafts/wiki/QUIC-Versions
+
 ## License
 
 MIT OR Apache-2.0

src/lib.rs

@@ -4,3 +4,8 @@ mod session;
 
 pub use crate::session::{NoiseConfig, NoiseSession};
 pub use ed25519_dalek::{Keypair, PublicKey};
+
+// https://github.com/quicwg/base-drafts/wiki/QUIC-Versions
+// reserved versions for quinn-noise 0xf0f0f2f[0-f]
+pub const SUPPORTED_QUIC_VERSIONS: &[u32] = &[0xf0f0f2f0];
+pub const DEFAULT_QUIC_VERSION: u32 = 0xf0f0f2f0;