chore(release): 0.2.0 [skip ci]

# [0.2.0](https://git.lumeweb.com/LumeWeb/libweb/compare/v0.1.3...v0.2.0) (2023-06-21)

### Features

* add deriveChildKey function ([d7cdaaf](d7cdaaf316))

CHANGELOG.md

@@ -1,3 +1,10 @@
+# [0.2.0](https://git.lumeweb.com/LumeWeb/libweb/compare/v0.1.3...v0.2.0) (2023-06-21)
+
+
+### Features
+
+* add deriveChildKey function ([d7cdaaf](https://git.lumeweb.com/LumeWeb/libweb/commit/d7cdaaf316d4d26ed44860701376d18030030708))
+
 ## [0.1.3](https://git.lumeweb.com/LumeWeb/libweb/compare/v0.1.2...v0.1.3) (2023-06-21)
 
 

npm-shrinkwrap.json

@@ -1,12 +1,12 @@
 {
     "name": "@lumeweb/libweb",
-    "version": "0.1.3",
+    "version": "0.2.0",
     "lockfileVersion": 3,
     "requires": true,
     "packages": {
         "": {
             "name": "@lumeweb/libweb",
-            "version": "0.1.3",
+            "version": "0.2.0",
             "dependencies": {
                 "@lumeweb/libportal": "^0.1.0",
                 "@noble/curves": "^1.1.0",

package.json

@@ -1,6 +1,6 @@
 {
     "name": "@lumeweb/libweb",
-    "version": "0.1.3",
+    "version": "0.2.0",
     "main": "lib/index.js",
     "type": "module",
     "repository": {

src/index.ts

@@ -9,4 +9,5 @@ export * from "./stringifyJSON.js";
 export * from "./types.js";
 export * from "./cid.js";
 export * from "./encoding.js";
+export * from "./keys.js";
 export { ed25519, sha512 };

src/keys.ts

@@ -0,0 +1,11 @@
+import { blake3 } from "@noble/hashes/blake3";
+import { concatBytes } from "@noble/hashes/utils";
+
+export function deriveChildKey(
+  parentKey: Uint8Array,
+  tweak: string,
+): Uint8Array {
+  const tweakHash = blake3(tweak);
+
+  return blake3(concatBytes(parentKey, tweakHash));
+}