From d3f3f85a4d63b875dbd3c9c384bdd84ab21e211a Mon Sep 17 00:00:00 2001
From: Monadic Cat <greenmonadcat@gmail.com>
Date: Wed, 17 Apr 2024 19:44:37 -0500
Subject: [PATCH] change example to use twilight_util::signature_validation

---
 examples/Cargo.toml             |  3 +--
 examples/model-webhook-slash.rs | 18 +++++-------------
 twilight-util/Cargo.toml        |  2 +-
 3 files changed, 7 insertions(+), 16 deletions(-)

diff --git a/examples/Cargo.toml b/examples/Cargo.toml
index 0f7642470a2..75ed6b3ad2b 100644
--- a/examples/Cargo.toml
+++ b/examples/Cargo.toml
@@ -7,10 +7,8 @@ version = "0.0.0"
 
 [dev-dependencies]
 anyhow = { default-features = false, features = ["std"], version = "1" }
-ed25519-dalek = "2"
 futures-util = { default-features = false, version = "0.3" }
 tokio-stream = { default-features = false, version = "0.1" }
-hex = "0.4"
 http-body-util = "0.1"
 hyper = { features = ["server"], version = "1" }
 hyper-util = { features = ["http1", "client-legacy"], version = "0.1" }
@@ -27,6 +25,7 @@ twilight-http = { path = "../twilight-http" }
 twilight-lavalink = { path = "../twilight-lavalink" }
 twilight-model = { path = "../twilight-model" }
 twilight-standby = { path = "../twilight-standby" }
+twilight-util = { path = "../twilight-util", features = ["signature-validation"] }
 
 [[example]]
 name = "cache-optimization"
diff --git a/examples/model-webhook-slash.rs b/examples/model-webhook-slash.rs
index 96a9a42ba39..a96077ba193 100644
--- a/examples/model-webhook-slash.rs
+++ b/examples/model-webhook-slash.rs
@@ -1,5 +1,3 @@
-use ed25519_dalek::{Verifier, VerifyingKey, PUBLIC_KEY_LENGTH};
-use hex::FromHex;
 use http_body_util::{BodyExt, Full};
 use hyper::{
     body::{Bytes, Incoming},
@@ -19,12 +17,10 @@ use twilight_model::{
     },
     http::interaction::{InteractionResponse, InteractionResponseData, InteractionResponseType},
 };
+use twilight_util::signature_validation::Key;
 
 /// Public key given from Discord.
-static PUB_KEY: Lazy<VerifyingKey> = Lazy::new(|| {
-    VerifyingKey::from_bytes(&<[u8; PUBLIC_KEY_LENGTH] as FromHex>::from_hex("PUBLIC_KEY").unwrap())
-        .unwrap()
-});
+static PUB_KEY: Lazy<Key> = Lazy::new(|| Key::from_hex("PUBLIC_KEY".as_bytes()).unwrap());
 
 /// Main request handler which will handle checking the signature.
 ///
@@ -66,10 +62,9 @@ where
     // Extract the signature to check against.
     let signature = if let Some(hex_sig) = req
         .headers()
-        .get("x-signature-ed25519")
-        .and_then(|v| v.to_str().ok())
+        .get(twilight_util::signature_validation::SIGNATURE_HEADER)
     {
-        hex_sig.parse().unwrap()
+        hex_sig.to_owned()
     } else {
         return Ok(Response::builder()
             .status(StatusCode::BAD_REQUEST)
@@ -82,10 +77,7 @@ where
 
     // Check if the signature matches and else return a error response.
     if PUB_KEY
-        .verify(
-            [timestamp.as_bytes(), &whole_body].concat().as_ref(),
-            &signature,
-        )
+        .verify(signature.as_bytes(), timestamp.as_bytes(), &whole_body)
         .is_err()
     {
         return Ok(Response::builder()
diff --git a/twilight-util/Cargo.toml b/twilight-util/Cargo.toml
index 00e9c5926a8..468c761acda 100644
--- a/twilight-util/Cargo.toml
+++ b/twilight-util/Cargo.toml
@@ -17,7 +17,7 @@ twilight-model = { default-features = false, optional = true, path = "../twiligh
 twilight-validate = { default-features = false, optional = true, path = "../twilight-validate", version = "0.16.0-rc.1" }
 
 # Signature validation
-ed25519-dalek = { version = "2.1.0", optional = true, default-features = false }
+ed25519-dalek = { version = "2.1.0", optional = true, default-features = false, features = ["std"] }
 hex = { version = "0.4.3", optional = true, default-features = false, features = ["std"] }
 serde_json = { optional = true, version = "1.0.96", default-features = false, features = ["std"] }