feat: Slash Commands (#337)

* feat: add discord interactions worker

* feat(interactions): update CI/CD and terraform to add interactions

* chore: fix lint issues

* chore: fix build & emulation

* fix(interactions): deployment + handler

* chore: remove worker-dist via gitignore

* feat: add /pickable-roles and /pick-role basis

* feat: add pick, remove, and update the general /roleypoly command

* fix: lint missing Member import

packages/interactions/utils/interactions.ts

@@ -0,0 +1,27 @@
+import { publicKey } from '@roleypoly/interactions/utils/config';
+import { InteractionRequest } from '@roleypoly/types';
+import nacl from 'tweetnacl';
+
+export const verifyRequest = (
+  request: Request,
+  interaction: InteractionRequest
+): boolean => {
+  const timestamp = request.headers.get('x-signature-timestamp');
+  const signature = request.headers.get('x-signature-ed25519');
+
+  if (!timestamp || !signature) {
+    return false;
+  }
+
+  if (
+    !nacl.sign.detached.verify(
+      Buffer.from(timestamp + JSON.stringify(interaction)),
+      Buffer.from(signature, 'hex'),
+      Buffer.from(publicKey, 'hex')
+    )
+  ) {
+    return false;
+  }
+
+  return true;
+};