From e839a0241b2d216d59c242cecec8bd454fc338a9 Mon Sep 17 00:00:00 2001
From: greenart7c3 <greenart7c3@proton.me>
Date: Wed, 31 Jan 2024 08:57:21 -0300
Subject: [PATCH] Initial support for amber

---
 ui/noogle/package.json                        |  11 +-
 ui/noogle/src/components/Home.vue             |   1 -
 ui/noogle/src/components/Nip07.vue            |  53 ++++++++-
 .../android-signer/AndroidSigner.ts           | 106 ++++++++++++++++++
 .../android-signer/classes/deffered.ts        |  21 ++++
 .../android-signer/helpers/nip19.ts           |  23 ++++
 .../android-signer/types/nostr-event.ts       |  54 +++++++++
 7 files changed, 263 insertions(+), 6 deletions(-)
 create mode 100644 ui/noogle/src/components/android-signer/AndroidSigner.ts
 create mode 100644 ui/noogle/src/components/android-signer/classes/deffered.ts
 create mode 100644 ui/noogle/src/components/android-signer/helpers/nip19.ts
 create mode 100644 ui/noogle/src/components/android-signer/types/nostr-event.ts

diff --git a/ui/noogle/package.json b/ui/noogle/package.json
index 6800f29..d85feb6 100644
--- a/ui/noogle/package.json
+++ b/ui/noogle/package.json
@@ -5,15 +5,18 @@
   "type": "module",
   "scripts": {
     "dev": "vite",
-    "build": "vite build",
-    "preview": "vite preview"
+    "build": "run-p type-check \"build-only {@}\" --",
+    "preview": "vite preview",
+    "type-check": "vue-tsc --build --force"
   },
   "dependencies": {
     "@rust-nostr/nostr-sdk": "^0.10.0",
     "@vueuse/core": "^10.7.2",
+    "bech32": "^2.0.0",
     "bootstrap": "^5.3.2",
     "daisyui": "^4.6.0",
     "mini-toastr": "^0.8.1",
+    "nostr-tools": "^1.17.0",
     "vue": "^3.4.15",
     "vue-notifications": "^1.0.2",
     "vue3-easy-data-table": "^1.5.47",
@@ -26,8 +29,10 @@
     "postcss": "^8.4.33",
     "sass": "^1.70.0",
     "tailwindcss": "^3.4.1",
+    "typescript": "~5.3.0",
     "vite": "^5.0.10",
-    "vue-router": "^4.2.5"
+    "vue-router": "^4.2.5",
+    "vue-tsc": "^1.8.27"
   },
   "optionalDependencies": {
     "@rollup/rollup-linux-x64-gnu": "4.6.1"
diff --git a/ui/noogle/src/components/Home.vue b/ui/noogle/src/components/Home.vue
index b6593dc..98f506b 100644
--- a/ui/noogle/src/components/Home.vue
+++ b/ui/noogle/src/components/Home.vue
@@ -9,7 +9,6 @@ export default {
   components: {Donate, Nip07, ResultsTable, Search}
 }
 
-
 </script>
 
 <template>
diff --git a/ui/noogle/src/components/Nip07.vue b/ui/noogle/src/components/Nip07.vue
index 7ca869e..b509031 100644
--- a/ui/noogle/src/components/Nip07.vue
+++ b/ui/noogle/src/components/Nip07.vue
@@ -34,6 +34,9 @@
           <h3 className="card-title">Nip07 Login</h3>
           <p>Use a Browser Nip07 Extension like getalby or nos2x to login</p>
          <button className="btn" @click="sign_in_nip07()">Browser Extension</button>
+         <template v-if="supports_android_signer">
+          <button className="btn" @click="sign_in_amber()">Amber Sign in</button>
+        </template>
         </div>
       </div>
     </div>
@@ -51,13 +54,14 @@ import {
   Filter,
   initLogger,
   LogLevel,
-  Timestamp, Keys, NostrDatabase, ClientBuilder, ClientZapper, Alphabet, SingleLetterTag, Options, Duration
+  Timestamp, Keys, NostrDatabase, ClientBuilder, ClientZapper, Alphabet, SingleLetterTag, Options, Duration, PublicKey
 } from "@rust-nostr/nostr-sdk";
 import VueNotifications from "vue-notifications";
 import store from '../store';
 import Nip89 from "@/components/Nip89.vue";
 import miniToastr from "mini-toastr";
 import deadnip89s from "@/components/data/deadnip89s.json";
+import amberSignerService from "./android-signer/AndroidSigner";
 import {useDark, useToggle} from "@vueuse/core";
 const isDark = useDark();
 //const toggleDark = useToggle(isDark);
@@ -72,12 +76,16 @@ export default {
       current_user: "",
       avatar: "",
       signer: "",
-
+      supports_android_signer: false,
     };
   },
 
   async mounted() {
      try{
+        if (amberSignerService.supported) {
+          this.supports_android_signer = true;
+        }
+        
         if (localStorage.getItem('nostr-key-method') === 'nip07')
         {
            await this.sign_in_nip07()
@@ -214,6 +222,47 @@ export default {
         console.log(error);
       }
     },
+    async sign_in_amber() {
+      try {
+
+        await loadWasmAsync();
+
+        if(logger){
+            try {
+                initLogger(LogLevel.debug());
+            } catch (error) {
+                console.log(error);
+            }
+        }
+
+        if (!amberSignerService.supported) {
+          alert("android signer not supported")
+          return;
+        }
+
+        const hexKey = await amberSignerService.getPublicKey();
+        let publicKey = PublicKey.fromHex(hexKey);
+        let keys = Keys.fromPublicKey(publicKey)
+        this.signer = ClientSigner.keys(keys)
+        let opts = new Options().waitForSend(false).connectionTimeout(Duration.fromSecs(5));
+        let client = new ClientBuilder().signer(this.signer).opts(opts).build()
+        for (const relay of store.state.relays){
+          await client.addRelay(relay);
+        }
+        await client.connect();
+        store.commit('set_client', client)
+        store.commit('set_pubkey', publicKey)
+        store.commit('set_hasEventListener', false)
+        localStorage.setItem('nostr-key-method', "android-signer")
+        localStorage.setItem('nostr-key', "")
+        await this.get_user_info(publicKey)
+
+        miniToastr.showMessage("Login successful!", "Logged in as " + publicKey.toHex(), VueNotifications.types.success)
+
+      } catch (error) {
+        alert(error);
+      }
+    },
     async getnip89s(){
 
         //let keys = Keys.generate()
diff --git a/ui/noogle/src/components/android-signer/AndroidSigner.ts b/ui/noogle/src/components/android-signer/AndroidSigner.ts
new file mode 100644
index 0000000..c4355ee
--- /dev/null
+++ b/ui/noogle/src/components/android-signer/AndroidSigner.ts
@@ -0,0 +1,106 @@
+import { getEventHash, nip19, verifySignature } from "nostr-tools";
+import createDefer, { Deferred } from "./classes/deffered";
+import { getPubkeyFromDecodeResult, isHex, isHexKey } from "./helpers/nip19";
+import { DraftNostrEvent, NostrEvent } from "./types/nostr-event";
+
+export function createGetPublicKeyIntent() {
+  return `intent:#Intent;scheme=nostrsigner;S.compressionType=none;S.returnType=signature;S.type=get_public_key;end`;
+}
+export function createSignEventIntent(draft: DraftNostrEvent) {
+  return `intent:${encodeURIComponent(
+    JSON.stringify(draft),
+  )}#Intent;scheme=nostrsigner;S.compressionType=none;S.returnType=signature;S.type=sign_event;end`;
+}
+export function createNip04EncryptIntent(pubkey: string, plainText: string) {
+  return `intent:${encodeURIComponent(
+    plainText,
+  )}#Intent;scheme=nostrsigner;S.pubKey=${pubkey};S.compressionType=none;S.returnType=signature;S.type=nip04_encrypt;end`;
+}
+export function createNip04DecryptIntent(pubkey: string, data: string) {
+  return `intent:${encodeURIComponent(
+    data,
+  )}#Intent;scheme=nostrsigner;S.pubKey=${pubkey};S.compressionType=none;S.returnType=signature;S.type=nip04_decrypt;end`;
+}
+
+let pendingRequest: Deferred<string> | null = null;
+
+function rejectPending() {
+  if (pendingRequest) {
+    pendingRequest.reject("Canceled");
+    pendingRequest = null;
+  }
+}
+
+function onVisibilityChange() {
+  if (document.visibilityState === "visible") {
+    if (!pendingRequest || !navigator.clipboard) return;
+
+    // read the result from the clipboard
+    setTimeout(() => {
+      navigator.clipboard
+        .readText()
+        .then((result) => pendingRequest?.resolve(result))
+        .catch((e) => pendingRequest?.reject(e));
+    }, 200);
+  }
+}
+document.addEventListener("visibilitychange", onVisibilityChange);
+
+async function intentRequest(intent: string) {
+  rejectPending();
+  const request = createDefer<string>();
+  window.open(intent, "_blank");
+  // NOTE: wait 500ms before setting the pending request since the visibilitychange event fires as soon as window.open is called
+  setTimeout(() => {
+    pendingRequest = request;
+  }, 500);
+  const result = await request;
+  if (result.length === 0) throw new Error("Empty clipboard");
+  return result;
+}
+
+async function getPublicKey() {
+  const result = await intentRequest(createGetPublicKeyIntent());
+  if (isHexKey(result)) return result;
+  else if (result.startsWith("npub") || result.startsWith("nprofile")) {
+    const decode = nip19.decode(result);
+    const pubkey = getPubkeyFromDecodeResult(decode);
+    if (!pubkey) throw new Error("Expected npub from clipboard");
+    return pubkey;
+  }
+  throw new Error("Expected clipboard to have pubkey");
+}
+
+async function signEvent(draft: DraftNostrEvent & { pubkey: string }): Promise<NostrEvent> {
+  const draftWithId = { ...draft, id: draft.id || getEventHash(draft) };
+  const sig = await intentRequest(createSignEventIntent(draftWithId));
+  if (!isHex(sig)) throw new Error("Expected hex signature");
+
+  const event: NostrEvent = { ...draftWithId, sig };
+  if (!verifySignature(event)) throw new Error("Invalid signature");
+  return event;
+}
+
+async function nip04Encrypt(pubkey: string, plaintext: string): Promise<string> {
+  const data = await intentRequest(createNip04EncryptIntent(pubkey, plaintext));
+  return data;
+}
+async function nip04Decrypt(pubkey: string, data: string): Promise<string> {
+  const plaintext = await intentRequest(createNip04DecryptIntent(pubkey, data));
+  return plaintext;
+}
+
+const amberSignerService = {
+  supported: navigator.userAgent.includes("Android") && navigator.clipboard,
+  getPublicKey,
+  signEvent,
+  nip04Encrypt,
+  nip04Decrypt,
+};
+
+// if (import.meta.env.DEV) {
+//   // @ts-ignore
+//   window.amberSignerService = amberSignerService;
+// }
+
+export default amberSignerService;
diff --git a/ui/noogle/src/components/android-signer/classes/deffered.ts b/ui/noogle/src/components/android-signer/classes/deffered.ts
new file mode 100644
index 0000000..937ee4b
--- /dev/null
+++ b/ui/noogle/src/components/android-signer/classes/deffered.ts
@@ -0,0 +1,21 @@
+export type Deferred<T> = Promise<T> & {
+    resolve: (value?: T | PromiseLike<T>) => void;
+    reject: (reason?: any) => void;
+  };
+  
+  export default function createDefer<T>() {
+    let _resolve: (value?: T | PromiseLike<T>) => void;
+    let _reject: (reason?: any) => void;
+    const promise = new Promise<T>((resolve, reject) => {
+      // @ts-ignore
+      _resolve = resolve;
+      _reject = reject;
+    }) as Deferred<T>;
+  
+    // @ts-ignore
+    promise.resolve = _resolve;
+    // @ts-ignore
+    promise.reject = _reject;
+  
+    return promise;
+  }
\ No newline at end of file
diff --git a/ui/noogle/src/components/android-signer/helpers/nip19.ts b/ui/noogle/src/components/android-signer/helpers/nip19.ts
new file mode 100644
index 0000000..c50e045
--- /dev/null
+++ b/ui/noogle/src/components/android-signer/helpers/nip19.ts
@@ -0,0 +1,23 @@
+import { getPublicKey, nip19 } from "nostr-tools";
+
+export function isHex(str?: string) {
+  if (str?.match(/^[0-9a-f]+$/i)) return true;
+  return false;
+}
+export function isHexKey(key?: string) {
+  if (key?.toLowerCase()?.match(/^[0-9a-f]{64}$/)) return true;
+  return false;
+}
+
+export function getPubkeyFromDecodeResult(result?: nip19.DecodeResult) {
+  if (!result) return;
+  switch (result.type) {
+    case "naddr":
+    case "nprofile":
+      return result.data.pubkey;
+    case "npub":
+      return result.data;
+    case "nsec":
+      return getPublicKey(result.data);
+  }
+}
\ No newline at end of file
diff --git a/ui/noogle/src/components/android-signer/types/nostr-event.ts b/ui/noogle/src/components/android-signer/types/nostr-event.ts
new file mode 100644
index 0000000..b5ba887
--- /dev/null
+++ b/ui/noogle/src/components/android-signer/types/nostr-event.ts
@@ -0,0 +1,54 @@
+export type ETag = ["e", string] | ["e", string, string] | ["e", string, string, string];
+export type ATag = ["a", string] | ["a", string, string];
+export type PTag = ["p", string] | ["p", string, string] | ["p", string, string, string];
+export type RTag = ["r", string] | ["r", string, string];
+export type DTag = ["d"] | ["d", string];
+export type EmojiTag = ["emoji", string, string];
+export type Tag = string[] | ETag | PTag | RTag | DTag | ATag;
+
+export type NostrEvent = {
+  id: string;
+  pubkey: string;
+  created_at: number;
+  kind: number;
+  tags: Tag[];
+  content: string;
+  sig: string;
+};
+export type CountResponse = {
+  count: number;
+  approximate?: boolean;
+};
+
+export type DraftNostrEvent = Omit<NostrEvent, "pubkey" | "id" | "sig"> & { pubkey?: string; id?: string };
+
+export type RawIncomingEvent = ["EVENT", string, NostrEvent];
+export type RawIncomingNotice = ["NOTICE", string];
+export type RawIncomingCount = ["COUNT", string, CountResponse];
+export type RawIncomingEOSE = ["EOSE", string];
+export type RawIncomingCommandResult = ["OK", string, boolean, string];
+export type RawIncomingNostrEvent =
+  | RawIncomingEvent
+  | RawIncomingNotice
+  | RawIncomingCount
+  | RawIncomingEOSE
+  | RawIncomingCommandResult;
+
+export function isETag(tag: Tag): tag is ETag {
+  return tag[0] === "e" && tag[1] !== undefined;
+}
+export function isPTag(tag: Tag): tag is PTag {
+  return tag[0] === "p" && tag[1] !== undefined;
+}
+export function isRTag(tag: Tag): tag is RTag {
+  return tag[0] === "r" && tag[1] !== undefined;
+}
+export function isDTag(tag: Tag): tag is DTag {
+  return tag[0] === "d";
+}
+export function isATag(tag: Tag): tag is ATag {
+  return tag[0] === "a" && tag[1] !== undefined;
+}
+export function isEmojiTag(tag: Tag): tag is EmojiTag {
+  return tag[0] === "emoji" && tag[1] !== undefined && tag[2] !== undefined;
+}
\ No newline at end of file