Prevent the crate to be used by accident

Cargo.toml

@@ -13,7 +13,7 @@ categories = ["cryptography"]
 
 [features]
 default = []
-hazardous-materials = []
+i-understand-and-accept-the-risks = []
 
 [dependencies]
 base64ct = { version = "1.6.0", default-features = false, features = ["std"] }

src/lib.rs

@@ -8,3 +8,6 @@ pub use scheme::Scheme;
 
 const DEFAULT_IKM_DURATION: u64 = 60 * 60 * 24 * 365; // In seconds
 const DEFAULT_SCHEME: Scheme = Scheme::XChaCha20Poly1305WithBlake3;
+
+#[cfg(not(feature = "i-understand-and-accept-the-risks"))]
+compile_error!("This crate is experimental and therefore comes with absolutely no security guaranty. To use it anyway, enable the \"i-understand-and-accept-the-risks\" feature.");