From a418477c3ee9bdd567cb1625f23abbd94758983d Mon Sep 17 00:00:00 2001
From: Adam Soltys <adam@coinos.io>
Date: Thu, 5 Feb 2026 23:05:32 -0800
Subject: use master seed for ark accounts

---
 src/components/Account.svelte                      |  50 ++++++-
 src/routes/(app)/account/[id]/+page.svelte         |   3 +-
 src/routes/(app)/account/ark/+page.svelte          | 158 ++++++++++++++++++++-
 src/routes/(app)/account/pass/+page.svelte         |  15 +-
 .../[amount]/[...feeRate]/+page.server.ts          |   2 +-
 .../[address]/[amount]/[...feeRate]/+page.svelte   |   6 +-
 .../lightning/[payreq]/[...memo]/+page.server.ts   |   2 +-
 7 files changed, 217 insertions(+), 19 deletions(-)

(limited to 'src')

diff --git a/src/components/Account.svelte b/src/components/Account.svelte
index aaef428b..b7ae58ee 100644
--- a/src/components/Account.svelte
+++ b/src/components/Account.svelte
@@ -1,10 +1,12 @@
 <script>
   import { hex } from "@scure/base";
+  import { bytesToHex } from "@noble/hashes/utils.js";
   import WalletPass from "$comp/WalletPass.svelte";
   import { run } from "svelte/legacy";
   import { onMount } from "svelte";
   import { goto } from "$app/navigation";  import Balance from "$comp/Balance.svelte";
   import { t } from "$lib/translations";
+  import { versions } from "$lib/utils";
   import { arkkey } from "$lib/ark";
   import {
     getRememberedWalletPassword,
@@ -36,7 +38,29 @@
     if (!cached) return false;
     try {
       const { decrypt } = await import("nostr-tools/nip49");
-      $arkkey = hex.encode(decrypt(seed, cached));
+      if (seed) {
+        // Legacy: per-account seed is raw hex key
+        $arkkey = hex.encode(decrypt(seed, cached));
+      } else if (user.seed) {
+        // Master seed: derive m/86'/0'/0'/0/0
+        const [
+          { HDKey },
+          { entropyToMnemonic, mnemonicToSeed },
+          { wordlist },
+        ] = await Promise.all([
+          import("@scure/bip32"),
+          import("@scure/bip39"),
+          import("@scure/bip39/wordlists/english.js"),
+        ]);
+        let entropy = await decrypt(user.seed, cached);
+        let mnemonic = entropyToMnemonic(entropy, wordlist);
+        let s = await mnemonicToSeed(mnemonic, cached);
+        let master = HDKey.fromMasterSeed(s, versions);
+        let arkChild = master.derive("m/86'/0'/0'/0/0");
+        $arkkey = bytesToHex(arkChild.privateKey);
+      } else {
+        return false;
+      }
       return true;
     } catch (e) {
       forgetWalletPassword();
@@ -65,7 +89,25 @@
 
   let submitPassword = async () => {
     const { decrypt } = await import("nostr-tools/nip49");
-    $arkkey = hex.encode(decrypt(seed, password));
+    if (seed) {
+      $arkkey = hex.encode(decrypt(seed, password));
+    } else if (user.seed) {
+      const [
+        { HDKey },
+        { entropyToMnemonic, mnemonicToSeed },
+        { wordlist },
+      ] = await Promise.all([
+        import("@scure/bip32"),
+        import("@scure/bip39"),
+        import("@scure/bip39/wordlists/english.js"),
+      ]);
+      let entropy = await decrypt(user.seed, password);
+      let mnemonic = entropyToMnemonic(entropy, wordlist);
+      let s = await mnemonicToSeed(mnemonic, password);
+      let master = HDKey.fromMasterSeed(s, versions);
+      let arkChild = master.derive("m/86'/0'/0'/0/0");
+      $arkkey = bytesToHex(arkChild.privateKey);
+    }
     passwordPrompt = false;
     if (pendingUrl) {
       goto(pendingUrl);
@@ -76,7 +118,7 @@
   let displayType = $derived(
     accountType === "ark"
       ? $t("accounts.ark")
-      : seed
+      : seed || (user.seed && accountType === "bitcoin")
         ? $t("accounts.bitcoin")
         : $t("accounts.custodial"),
   );
@@ -118,7 +160,7 @@
           class="w-8 h-8 rounded-full object-cover"
           alt="Ark"
         />
-      {:else if seed}
+      {:else if seed || (user.seed && accountType === "bitcoin")}
         <iconify-icon
           noobserver
           icon="cryptocurrency-color:btc"
diff --git a/src/routes/(app)/account/[id]/+page.svelte b/src/routes/(app)/account/[id]/+page.svelte
index db93a04d..897bbe62 100644
--- a/src/routes/(app)/account/[id]/+page.svelte
+++ b/src/routes/(app)/account/[id]/+page.svelte
@@ -15,7 +15,8 @@
 
   let { data } = $props();
   let { account, user } = data;
-  let { id, seed } = account;
+  let { id } = account;
+  let seed = $derived(account.seed || user.seed);
   let displayType = $derived(
     account.type === "ark"
       ? $t("accounts.ark")
diff --git a/src/routes/(app)/account/ark/+page.svelte b/src/routes/(app)/account/ark/+page.svelte
index aee80837..32dbfe13 100644
--- a/src/routes/(app)/account/ark/+page.svelte
+++ b/src/routes/(app)/account/ark/+page.svelte
@@ -5,19 +5,28 @@
   import Spinner from "$comp/Spinner.svelte";
   import { bytesToHex, randomBytes } from "@noble/hashes/utils.js";
   import { hex } from "@scure/base";
-  import { focus, fail, post, copy } from "$lib/utils";
+  import { focus, fail, post, copy, versions } from "$lib/utils";
   import { goto } from "$app/navigation";
   import { arkServerUrl } from "$lib/ark";
+  import { HDKey } from "@scure/bip32";
+  import {
+    entropyToMnemonic,
+    mnemonicToSeed,
+  } from "@scure/bip39";
+  import { wordlist } from "@scure/bip39/wordlists/english.js";
   import {
     rememberForOptions,
     defaultRememberForMs,
     rememberWalletPassword,
     forgetWalletPassword,
+    getRememberedWalletPassword,
   } from "$lib/passwordCache";
 
   let { data } = $props();
   let { user } = data;
 
+  let hasMasterSeed = $derived(!!user.seed);
+
   let privateKey = $state("");
   let arkAddress = $state("");
   let nsec = $state("");
@@ -34,10 +43,40 @@
   let name = "Ark Vault";
   let type = "ark";
 
-  onMount(() => {
-    generateKey();
+  onMount(async () => {
+    if (hasMasterSeed) {
+      // Try cached password first
+      const cached = getRememberedWalletPassword();
+      if (cached) {
+        password = cached;
+        confirm = cached;
+        await deriveFromMasterSeed(cached);
+      }
+    } else {
+      await generateKey();
+    }
   });
 
+  let deriveFromMasterSeed = async (pw) => {
+    try {
+      const { decrypt } = await import("nostr-tools/nip49");
+      const { SingleKey, Wallet } = await import("@arkade-os/sdk");
+      let entropy = await decrypt(user.seed, pw);
+      let mnemonic = entropyToMnemonic(entropy, wordlist);
+      let seed = await mnemonicToSeed(mnemonic, pw);
+      let master = HDKey.fromMasterSeed(seed, versions);
+      let arkChild = master.derive("m/86'/0'/0'/0/0");
+      let arkHex = bytesToHex(arkChild.privateKey);
+      const identity = SingleKey.fromHex(arkHex);
+      const wallet = await Wallet.create({ identity, arkServerUrl });
+      arkAddress = await wallet.getAddress();
+      confirmed = true;
+    } catch (e) {
+      console.log("master seed derivation failed", e);
+      fail("Invalid password");
+    }
+  };
+
   let generateKey = async () => {
     const { nip19 } = await import("nostr-tools");
     const { SingleKey, Wallet } = await import("@arkade-os/sdk");
@@ -46,7 +85,6 @@
     showNsec = false;
     confirmed = false;
 
-    // Derive the ARK address from the private key
     const identity = SingleKey.fromHex(privateKey);
     const wallet = await Wallet.create({ identity, arkServerUrl });
     arkAddress = await wallet.getAddress();
@@ -61,6 +99,33 @@
   };
 
   let submit = async () => {
+    if (hasMasterSeed) {
+      if (!password) {
+        fail("Password required");
+        return;
+      }
+
+      submitting = true;
+      await tick();
+
+      try {
+        if (!arkAddress) await deriveFromMasterSeed(password);
+        await post("/account", { name, type, arkAddress });
+        if (rememberForMs) {
+          rememberWalletPassword(password, rememberForMs);
+        } else {
+          forgetWalletPassword();
+        }
+        goto(`/${user.username}`);
+      } catch (e) {
+        console.log(e);
+        fail(e.message);
+      }
+
+      submitting = false;
+      return;
+    }
+
     if (!confirmed) {
       fail("Please backup your key first");
       return;
@@ -75,7 +140,6 @@
     await tick();
 
     try {
-      // Encrypt the private key using NIP-49
       const { encrypt } = await import("nostr-tools/nip49");
       let seed = await encrypt(hex.decode(privateKey), password);
 
@@ -101,7 +165,89 @@
   </div>
 
   <div class="container w-full mx-auto text-lg px-4 max-w-xl space-y-5">
-    {#if !confirmed}
+    {#if hasMasterSeed}
+      <form onsubmit={preventDefault(submit)} class="space-y-5">
+        <p class="text-secondary">
+          Your Ark wallet will be derived from your master seed. Enter your wallet password to continue.
+        </p>
+
+        <label
+          for="password"
+          class="input flex items-center justify-center gap-2 w-full"
+        >
+          {#if revealPassword}
+            <input
+              name="password"
+              type="text"
+              required
+              bind:value={password}
+              autocapitalize="none"
+              class="clean"
+              placeholder="Wallet password"
+            />
+          {:else}
+            <input
+              use:focus
+              name="password"
+              type="password"
+              placeholder="Wallet password"
+              required
+              bind:value={password}
+              autocapitalize="none"
+              class="clean"
+            />
+          {/if}
+
+          <button
+            type="button"
+            class="ml-auto"
+            aria-label="Toggle password visibility"
+            onclick={() => (revealPassword = !revealPassword)}
+          >
+            <iconify-icon
+              noobserver
+              icon={revealPassword ? "ph:eye-bold" : "ph:eye-slash-bold"}
+              width="32"
+            ></iconify-icon>
+          </button>
+        </label>
+
+        <div class="space-y-2">
+          <label for="rememberFor" class="text-sm text-secondary">
+            Remember for
+          </label>
+          <select
+            id="rememberFor"
+            class="w-full"
+            value={rememberForMs}
+            onchange={(e) => (rememberForMs = Number(e.target.value))}
+          >
+            {#each rememberForOptions as option}
+              <option value={option.ms}>{option.label}</option>
+            {/each}
+          </select>
+        </div>
+
+        <div class="flex gap-2">
+          <a href={`/${user.username}`} class="contents">
+            <button type="button" class="btn !w-auto grow">
+              Back
+            </button>
+          </a>
+          <button
+            disabled={submitting}
+            type="submit"
+            class="btn btn-accent !w-auto grow"
+          >
+            {#if submitting}
+              <Spinner />
+            {:else}
+              Create Wallet
+            {/if}
+          </button>
+        </div>
+      </form>
+    {:else if !confirmed}
       <div class="space-y-4">
         <p class="text-secondary">
           Your Ark wallet is secured by a private key. Please copy it down somewhere safe.
diff --git a/src/routes/(app)/account/pass/+page.svelte b/src/routes/(app)/account/pass/+page.svelte
index 74e45f17..a64d95ee 100644
--- a/src/routes/(app)/account/pass/+page.svelte
+++ b/src/routes/(app)/account/pass/+page.svelte
@@ -31,8 +31,6 @@
     revealPassword = $state(),
     revealConfirm = $state();
   let rememberForMs = $state(defaultRememberForMs);
-  let type = "bitcoin";
-  let name = $t("accounts.savings");
 
   onMount(() => {
     if (!$mnemonic) goto("/account/new");
@@ -53,15 +51,26 @@
         password,
       );
 
+      // Save master seed on user
+      await post("/post/user", { seed });
+
       let master = HDKey.fromMasterSeed(
         await mnemonicToSeed($mnemonic, password),
         versions,
       );
 
+      // Bitcoin account at m/84'/0'/0'
       let child = master.derive("m/84'/0'/0'");
       let pubkey = child.publicExtendedKey;
       let fingerprint = child.fingerprint.toString(16).padStart(8, "0");
-      await post("/account", { fingerprint, pubkey, name, seed, type });
+      await post("/account", {
+        fingerprint,
+        pubkey,
+        name: $t("accounts.savings"),
+        type: "bitcoin",
+        accountIndex: 0,
+      });
+
       if (rememberForMs) {
         rememberWalletPassword(password, rememberForMs);
       } else {
diff --git a/src/routes/(app)/send/ark/[address]/[amount]/[...feeRate]/+page.server.ts b/src/routes/(app)/send/ark/[address]/[amount]/[...feeRate]/+page.server.ts
index acdd77a4..309d75fa 100644
--- a/src/routes/(app)/send/ark/[address]/[amount]/[...feeRate]/+page.server.ts
+++ b/src/routes/(app)/send/ark/[address]/[amount]/[...feeRate]/+page.server.ts
@@ -9,7 +9,7 @@ export async function load({ params: { address, amount }, cookies, parent }) {
 
 	const account = await get(`/account/${aid}`, auth(cookies));
 
-	if (account.seed) {
+	if (account.type === "bitcoin") {
 		const inv = await post(
 			"/invoice",
 			{ invoice: { type: "bitcoin", amount: parseInt(amount), forward: address }, user },
diff --git a/src/routes/(app)/send/bitcoin/[address]/[amount]/[...feeRate]/+page.svelte b/src/routes/(app)/send/bitcoin/[address]/[amount]/[...feeRate]/+page.svelte
index acbaf3f9..ed225d00 100644
--- a/src/routes/(app)/send/bitcoin/[address]/[amount]/[...feeRate]/+page.svelte
+++ b/src/routes/(app)/send/bitcoin/[address]/[amount]/[...feeRate]/+page.svelte
@@ -87,7 +87,7 @@
       return;
     }
 
-    if (account.seed && !signed) cancel(), void togglePassword();
+    if ((account.seed || data.user.seed) && !signed) cancel(), void togglePassword();
     return async ({ result }) => {
       if (result.type === "redirect") {
         goto(result.location);
@@ -111,11 +111,11 @@
       import("@scure/bip39"),
       import("@scure/bip39/wordlists/english.js"),
     ]);
-    let entropy = await decrypt(account.seed, password);
+    let entropy = await decrypt(account.seed || data.user.seed, password);
     let mnemonic = entropyToMnemonic(entropy, wordlist);
     let seed = await mnemonicToSeed(mnemonic, password);
     let master = HDKey.fromMasterSeed(seed, network);
-    let child = master.derive("m/84'/0'/0'");
+    let child = master.derive(`m/84'/0'/${account.accountIndex ?? 0}'`);
 
     let raw = decode(hex);
     let isPSBT = raw[0] === 0x70 && raw[1] === 0x73 && raw[2] === 0x62 && raw[3] === 0x74;
diff --git a/src/routes/(app)/send/lightning/[payreq]/[...memo]/+page.server.ts b/src/routes/(app)/send/lightning/[payreq]/[...memo]/+page.server.ts
index 52f767f0..fef0a359 100644
--- a/src/routes/(app)/send/lightning/[payreq]/[...memo]/+page.server.ts
+++ b/src/routes/(app)/send/lightning/[payreq]/[...memo]/+page.server.ts
@@ -18,7 +18,7 @@ export async function load({ cookies, params, parent }) {
 		if (account.type === "ark") {
 			data.account = account;
 			data.serverArkAddress = await get("/ark/address");
-		} else if (account.seed) {
+		} else if (account.type === "bitcoin") {
 			data.account = account;
 		}
 	}
-- 
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