1 files changed, 24 insertions, 0 deletions
diff --git a/packages/interactions/discord/verification.ts b/packages/interactions/discord/verification.ts
new file mode 100644
index 0000000..89d26db
--- /dev/null
+++ b/packages/interactions/discord/verification.ts
@@ -0,0 +1,24 @@
+import { verifyKey } from "discord-interactions";
+import type { Environment, DiscordInteraction } from "./interfaces.ts";
+
+export const verifyDiscordRequest = async (
+  request: Request,
+  environment: Environment,
+): Promise<{ isValid: boolean; interaction?: DiscordInteraction }> => {
+  const signature = request.headers.get("x-signature-ed25519");
+  const timestamp = request.headers.get("x-signature-timestamp");
+  const body = await request.text();
+  const isValidRequest =
+    signature &&
+    timestamp &&
+    (await verifyKey(
+      body,
+      signature,
+      timestamp,
+      environment.DISCORD_PUBLIC_KEY,
+    ));
+
+  if (!isValidRequest) return { isValid: false };
+
+  return { interaction: JSON.parse(body) as DiscordInteraction, isValid: true };
+};