chore(release): 0.2.0-develop.1 [skip ci]

# [0.2.0-develop.1](https://git.lumeweb.com/LumeWeb/libweb/compare/v0.1.3...v0.2.0-develop.1) (2023-06-23)

### Bug Fixes

* need to add dom support to TS ([738c3f1](738c3f12cf))

### Features

* add deriveChildKey function ([d7cdaaf](d7cdaaf316))
* add portal management apis ([d340447](d340447aba))
* implement initial download method ([7c07211](7c07211356))

.presetterrc.json

@@ -4,7 +4,8 @@
         "tsconfig": {
             "compilerOptions": {
                 "lib": [
-                    "ES2021"
+                    "ES2021",
+                    "dom"
                 ]
             }
         },

CHANGELOG.md

@@ -1,3 +1,17 @@
+# [0.2.0-develop.1](https://git.lumeweb.com/LumeWeb/libweb/compare/v0.1.3...v0.2.0-develop.1) (2023-06-23)
+
+
+### Bug Fixes
+
+* need to add dom support to TS ([738c3f1](https://git.lumeweb.com/LumeWeb/libweb/commit/738c3f12cfb49456fbcdd433b3f4bd30daa031b7))
+
+
+### Features
+
+* add deriveChildKey function ([d7cdaaf](https://git.lumeweb.com/LumeWeb/libweb/commit/d7cdaaf316d4d26ed44860701376d18030030708))
+* add portal management apis ([d340447](https://git.lumeweb.com/LumeWeb/libweb/commit/d340447aba098dbac6163bfbacca0429323e6e45))
+* implement initial download method ([7c07211](https://git.lumeweb.com/LumeWeb/libweb/commit/7c07211356497ed36119d32943c46cb2e268b30f))
+
 ## [0.1.3](https://git.lumeweb.com/LumeWeb/libweb/compare/v0.1.2...v0.1.3) (2023-06-21)
 
 

package.json

@@ -1,6 +1,6 @@
 {
     "name": "@lumeweb/libweb",
-    "version": "0.1.3",
+    "version": "0.2.0-develop.1",
     "main": "lib/index.js",
     "type": "module",
     "repository": {
@@ -21,7 +21,7 @@
         "semantic-release": "semantic-release"
     },
     "dependencies": {
-        "@lumeweb/libportal": "^0.1.0",
+        "@lumeweb/libportal": "^0.2.0-develop.2",
         "@noble/curves": "^1.1.0",
         "@noble/hashes": "^1.3.1"
     },

src/download.ts

@@ -1 +1,41 @@
-export function downloadObject(cid: string) {}
+import { getActivePortals } from "#portal.js";
+import { ErrTuple } from "#types.js";
+import { decodeCid, getVerifiableStream } from "@lumeweb/libportal";
+
+const NO_PORTALS_ERROR = [null, "no active portals"] as ErrTuple;
+
+export async function downloadObject(cid: string): Promise<ErrTuple> {
+  const activePortals = getActivePortals();
+
+  if (!activePortals.size) {
+    return NO_PORTALS_ERROR;
+  }
+
+  for (const portal of activePortals) {
+    if (!(await portal.isLoggedIn())) {
+      try {
+        await portal.register();
+      } catch {
+        continue;
+      }
+
+      await portal.login();
+    }
+
+    let stream, proof;
+
+    try {
+      stream = await portal.downloadFile(cid);
+      proof = await portal.downloadProof(cid);
+    } catch {
+      continue;
+    }
+
+    return [
+      await getVerifiableStream(decodeCid(cid).hash, proof, stream),
+      null,
+    ];
+  }
+
+  return NO_PORTALS_ERROR;
+}

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));
+}

src/portal.ts

@@ -0,0 +1,78 @@
+import { ErrTuple, KeyPair, Portal } from "#types.js";
+import { Client } from "@lumeweb/libportal";
+import { deriveChildKey } from "#keys.js";
+import { ed25519 } from "@noble/curves/ed25519";
+import { bytesToHex } from "@noble/hashes/utils.js";
+
+let activePortalMasterKey;
+
+export const DEFAULT_PORTAL_LIST: Portal[] = [
+  { id: "lumeweb", url: "https://web3portal.com", name: "web3portal.com" },
+];
+
+const ACTIVE_PORTALS = new Set<Client>();
+
+type PortalSessionsStore = { [id: string]: string };
+
+export function maybeInitDefaultPortals(): ErrTuple {
+  if (!activePortalMasterKey) {
+    return [null, "activePortalMasterKey not set"];
+  }
+
+  let portalSessionsData = window.localStorage.getItem("portals");
+  let portalSessions: PortalSessionsStore = {};
+  if (portalSessions) {
+    portalSessions = JSON.parse(
+      portalSessionsData as string,
+    ) as PortalSessionsStore;
+  }
+
+  for (const portal of DEFAULT_PORTAL_LIST) {
+    let jwt: string | null = null;
+
+    if (portalSessions) {
+      if (portal.id in portalSessions) {
+        jwt = portalSessions[portal.id];
+      }
+    }
+
+    const client = new Client({
+      email: generatePortalEmail(portal),
+      portalUrl: portal.url,
+      privateKey: generatePortalKeyPair(portal).privateKey,
+      jwt: jwt as string,
+    });
+
+    ACTIVE_PORTALS.add(client);
+  }
+
+  return [null, null];
+}
+
+export function setActivePortalMasterKey(key: Uint8Array) {
+  activePortalMasterKey = key;
+}
+
+export function generatePortalEmail(portal: Portal) {
+  const keyPair = generatePortalKeyPair(portal);
+
+  const userId = bytesToHex(keyPair.publicKey.slice(0, 12));
+
+  return `${userId}@example.com`;
+}
+
+export function generatePortalKeyPair(portal: Portal): KeyPair {
+  const privateKey = deriveChildKey(
+    activePortalMasterKey,
+    `portal-account:${portal.id}`,
+  );
+
+  return {
+    privateKey,
+    publicKey: ed25519.getPublicKey(privateKey),
+  };
+}
+
+export function getActivePortals(): Set<Client> {
+  return ACTIVE_PORTALS;
+}

src/types.ts

@@ -71,6 +71,11 @@ interface RequestOverrideResponse {
   body?: Uint8Array;
 }
 
+export interface KeyPair {
+  publicKey: Uint8Array;
+  privateKey: Uint8Array;
+}
+
 export {
   DataFn,
   ErrFn,