source refactor

src/lib/crypto.ts

@@ -0,0 +1,20 @@
+import { encodeBase64 } from "https://deno.land/std@0.222.1/encoding/base64.ts";
+
+export async function is_relevant(text: string) {
+	return (await hash(text)) === relevant_hash;
+}
+
+async function hash(namespace: string) {
+	const buffer = new TextEncoder().encode(namespace);
+	const hash = await crypto.subtle.digest("SHA-512", buffer);
+	const base64 = encodeBase64(hash);
+	return base64;
+}
+
+const relevant_hash = "Qa4xy8yRPnBsQf8U2UUE7tse2u4Fi/Aqxbt" +
+	"6aq56m5ofcmCkTi8PbgMBF1OtHC6qkXDF2tz2qKprYCIAMzTSQQ==";
+Deno.test("encode_namespace", async () => {
+	const namespace = "CHANGEME";
+	const base64 = await hash(namespace);
+	console.log({ namespace, base64 });
+});