From 693081c7408b9894617ad62dfeccee54eeda4f36 Mon Sep 17 00:00:00 2001
From: Derrick Hammer <derrick@derrickhammer.com>
Date: Fri, 22 Jul 2022 19:49:39 -0400
Subject: [PATCH] *Move hashDataKey to a dedicated utility package

---
 package.json |  1 +
 src/dns.ts   |  3 ++-
 src/util.ts  | 27 ---------------------------
 3 files changed, 3 insertions(+), 28 deletions(-)

diff --git a/package.json b/package.json
index 6ff15e5..66ce3ae 100644
--- a/package.json
+++ b/package.json
@@ -11,6 +11,7 @@
     "dependencies": {
         "@hyperswarm/dht": "^6.0.1",
         "@hyperswarm/dht-relay": "^0.3.0",
+        "@lumeweb/kernel-utils": "https://github.com/LumeWeb/kernel-utils.git",
         "@pokt-network/pocket-js": "^0.8.0-rc",
         "@solana/web3.js": "^1.47.3",
         "@types/acme-client": "^3.3.0",
diff --git a/src/dns.ts b/src/dns.ts
index 90ae3d4..d64afad 100644
--- a/src/dns.ts
+++ b/src/dns.ts
@@ -5,9 +5,10 @@ import { overwriteRegistryEntry } from "libskynetnode";
 import { Buffer } from "buffer";
 import { Parser } from "xml2js";
 import { URL } from "url";
-import { errorExit, hashDataKey } from "./util.js";
+import { errorExit } from "./util.js";
 import { pack } from "msgpackr";
 import config from "./config.js";
+import { hashDataKey } from "@lumeweb/kernel-utils";
 
 const { createHash } = await import("crypto");
 
diff --git a/src/util.ts b/src/util.ts
index 90f4a96..a8b832f 100644
--- a/src/util.ts
+++ b/src/util.ts
@@ -1,6 +1,4 @@
 import * as chainNetworks from "./networks.json" assert { type: "json" };
-import { Buffer } from "buffer";
-import { blake2b } from "libskynet";
 
 type networks = { [net: string]: string };
 
@@ -39,28 +37,3 @@ export function isIp(ip: string) {
     ip
   );
 }
-
-export function hashDataKey(dataKey: string): Uint8Array {
-  return blake2b(encodeUtf8String(dataKey));
-}
-
-function encodeUtf8String(str: string): Uint8Array {
-  const byteArray = stringToUint8ArrayUtf8(str);
-  const encoded = new Uint8Array(8 + byteArray.length);
-  encoded.set(encodeNumber(byteArray.length));
-  encoded.set(byteArray, 8);
-  return encoded;
-}
-
-function stringToUint8ArrayUtf8(str: string): Uint8Array {
-  return Uint8Array.from(Buffer.from(str, "utf-8"));
-}
-
-function encodeNumber(num: number): Uint8Array {
-  const encoded = new Uint8Array(8);
-  for (let index = 0; index < encoded.length; index++) {
-    encoded[index] = num & 0xff;
-    num = num >> 8;
-  }
-  return encoded;
-}