bolt12 zaps: accept offers in send flow, show/publish user offer

- parse lno= from BIP-321 bitcoin: URIs; send page parses offers for
  preview now that /parse handles them
- settings/nostr shows the user's standing lno1 offer with copy/QR and a
  button to publish it as a kind 10058 offer list for NIP-177 zaps
- new locale strings translated

Co-Authored-By: Claude Fable 5 <[email protected]>

3 files changed, 84 insertions, 6 deletions

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 eb324775..2a30defa 100644
--- a/src/routes/(app)/send/lightning/[payreq]/[...memo]/+page.server.ts
+++ b/src/routes/(app)/send/lightning/[payreq]/[...memo]/+page.server.ts
@@ -6,9 +6,7 @@ export async function load({ cookies, params, parent }) {
 	const { user } = await parent();
 	let data = { ...params };
 	const rates = await getRates();
-	if (!params.payreq.startsWith("lno")) {
-		data = { ...data, ...(await post("/parse", params, auth(cookies))) };
-	}
+	data = { ...data, ...(await post("/parse", params, auth(cookies))) };
 
 	data.rate = rates[user.currency];
 	return data;
diff --git a/src/routes/(app)/settings/nostr/+page.server.ts b/src/routes/(app)/settings/nostr/+page.server.ts
index 1767ebaf..84b3fa27 100644
--- a/src/routes/(app)/settings/nostr/+page.server.ts
+++ b/src/routes/(app)/settings/nostr/+page.server.ts
@@ -4,7 +4,13 @@ import { auth, get } from "$lib/utils";
 export const load = async ({ cookies }) => {
 	const { challenge } = await get("/challenge");
 	const apps = await get("/apps", auth(cookies));
-	return { apps, challenge };
+
+	let offer;
+	try {
+		({ hash: offer } = await get("/offer", auth(cookies)));
+	} catch (e) {}
+
+	return { apps, challenge, offer };
 };
 
 export const actions = {
diff --git a/src/routes/(app)/settings/nostr/+page.svelte b/src/routes/(app)/settings/nostr/+page.svelte
index 7168f4f7..5ba5f636 100644
--- a/src/routes/(app)/settings/nostr/+page.svelte
+++ b/src/routes/(app)/settings/nostr/+page.svelte
@@ -1,7 +1,7 @@
 <script>
   import { untrack } from "svelte";
   import { browser } from "$app/environment";
-  import { getNsec } from "$lib/nostr";
+  import { getNsec, send, sign } from "$lib/nostr";
   import { page } from "$app/stores";
   import { tick } from "svelte";
   import { t } from "$lib/translations";
@@ -13,7 +13,7 @@
   import { signer, save } from "$lib/store";
 
   let { data } = $props();
-  let { apps, challenge, user } = $derived(data);
+  let { apps, challenge, offer, user } = $derived(data);
   let npub = $state(untrack(() => user.npub));
   let extensionAvailable = $derived(browser && window.nostr);
   let { locale } = $derived(user);
@@ -41,6 +41,33 @@
     await tick();
     $save.click();
   };
+
+  let publishing = $state(),
+    published = $state();
+
+  // Kind 10058 is the NIP-177 BOLT12 offer list — publishing it lets nostr
+  // clients (Amethyst v1.13+) zap this user over BOLT12. Replaceable event,
+  // so republishing just updates it.
+  let publishOffer = async () => {
+    try {
+      publishing = true;
+      let event = {
+        kind: 10058,
+        content: "",
+        created_at: Math.round(Date.now() / 1000),
+        tags: [["offer", offer]],
+      };
+
+      event = await sign(event, user);
+      await send(event);
+      published = true;
+    } catch (e) {
+      console.log(e);
+      fail($t("user.settings.offerPublishFailed"));
+    } finally {
+      publishing = false;
+    }
+  };
 </script>
 
 <input type="hidden" name="challenge" value={challenge} />
@@ -145,6 +172,53 @@
   </div>
 </div>
 
+{#if offer}
+  <div class="space-y-2">
+    <h2 class="text-2xl font-bold mb-2">
+      {$t("user.settings.bolt12Offer")}
+    </h2>
+    <p class="text-secondary mb-4">
+      {$t("user.settings.bolt12OfferDescription")}
+    </p>
+
+    <div class="break-all text-secondary">{offer}</div>
+
+    <div class="flex my-auto gap-1">
+      <button
+        type="button"
+        class="my-auto btn btn-circle !w-auto grow"
+        onclick={() => copy(offer)}
+        aria-label="Copy"
+        ><iconify-icon noobserver icon="ph:copy-bold" width="32"
+        ></iconify-icon> {$t("accounts.copy")}</button
+      >
+
+      <a
+        href={`/qr/${encodeURIComponent(offer)}`}
+        class="my-auto btn btn-circle !w-auto grow"
+        aria-label="QR"
+      >
+        <iconify-icon noobserver icon="ph:qr-code-bold" width="32"
+        ></iconify-icon>
+        {$t("accounts.qr")}
+      </a>
+
+      <button
+        type="button"
+        class="my-auto btn btn-circle !w-auto grow"
+        onclick={publishOffer}
+        disabled={publishing}
+        aria-label="Publish"
+        ><iconify-icon noobserver icon="ph:megaphone-bold" width="32"
+        ></iconify-icon>
+        {published
+          ? $t("user.settings.offerPublished")
+          : $t("user.settings.publishOffer")}</button
+      >
+    </div>
+  </div>
+{/if}
+
 {#if revealNwc}
   <div class="break-all grow">
     {nwc}