migrate: flag the account instead of renaming it

Renaming to <name>v2 was a hack for freeing the username, and v3/v4/v9
fallbacks made it worse. The page now sweeps the balance and sets the
new `migrated` flag: the registrar takes over receiving for the name
while the old account keeps working here, unchanged.

Co-Authored-By: Claude Fable 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01Wvj4aoeMZwA7VUGdJP9Swi

2 files changed, 12 insertions, 38 deletions

diff --git a/src/routes/(app)/migrate/+page.server.ts b/src/routes/(app)/migrate/+page.server.ts
index 5182e8a0..f1964d1b 100644
--- a/src/routes/(app)/migrate/+page.server.ts
+++ b/src/routes/(app)/migrate/+page.server.ts
@@ -20,26 +20,12 @@ async function invoiceFor(address: string, sats: number) {
 	return inv.pr as string;
 }
 
-// The server only accepts letters and numbers, 2–24 of them, so the retired
-// name can't carry a separator. Candidates are <name>v2, <name>v3, … each
-// trimmed to fit, so a long username still lands inside the limit.
-function retiredNames(username: string) {
-	const base = String(username).replace(/[^\p{L}\p{N}]/gu, "");
-	const out: string[] = [];
-	for (let n = 2; n <= 9; n++) {
-		const suffix = `v${n}`;
-		out.push(base.slice(0, 24 - suffix.length) + suffix);
-	}
-	return out;
-}
-
 export async function load({ parent, url }) {
 	const { user } = await parent();
 	if (!user) redirect(307, `/login?redirect=${encodeURIComponent(url.pathname + url.search)}`);
 	return {
 		to: url.searchParams.get("to") || "",
 		back: url.searchParams.get("back") || "",
-		newName: retiredNames(user.username)[0],
 	};
 }
 
@@ -76,23 +62,11 @@ export const actions = {
 				}
 				if (!sent) throw lastErr;
 			}
-			// Releasing the username is what lets them keep it on v3. If the
-			// retired name is itself taken, step to the next candidate.
-			let renamed = "";
-			let renameErr;
-			for (const candidate of retiredNames(username)) {
-				try {
-					await post("/user", { username: candidate, ...(pin ? { pin } : {}) }, auth(cookies));
-					renamed = candidate;
-					break;
-				} catch (e) {
-					renameErr = e;
-					const msg = String((e as any)?.message || e);
-					if (!/taken/i.test(msg)) throw e;
-				}
-			}
-			if (!renamed) throw renameErr;
-			return { ok: true, sent, released: username, renamed };
+			// Hand the name over for receiving. The account itself stays exactly
+			// as it is — same username, same history, still usable here; the
+			// registrar just becomes the answer for incoming payments.
+			await post("/user", { migrated: true, ...(pin ? { pin } : {}) }, auth(cookies));
+			return { ok: true, sent, released: username };
 		} catch (e) {
 			const msg = e && typeof e === "object" && "message" in e ? String(e.message) : String(e);
 			return { error: msg, sent };
diff --git a/src/routes/(app)/migrate/+page.svelte b/src/routes/(app)/migrate/+page.svelte
index e1e4a79d..0853c15b 100644
--- a/src/routes/(app)/migrate/+page.svelte
+++ b/src/routes/(app)/migrate/+page.svelte
@@ -9,7 +9,7 @@
   import { enhance } from "$app/forms";
 
   let { data, form } = $props();
-  let { user, to, back, newName } = $derived(data);
+  let { user, to, back } = $derived(data);
 
   let working = $state(false);
   let balance = $derived(user?.balance || 0);
@@ -36,16 +36,16 @@
         <p>{form.sent.toLocaleString()} sats are on their way to your new wallet.</p>
       {/if}
       <p>
-        Your username was released, so <strong>{form.released}</strong> can be yours again on
-        coinos v3.
+        <strong>{form.released}@coinos.io</strong> now receives into your coinos v3 wallet.
       </p>
       <a class="btn btn-primary w-full" href={backUrl}>Back to coinos v3</a>
     </div>
   {:else}
     <p>
-      This sends your balance to your new wallet and frees up your username so you can keep
-      it there. Your old account stays, renamed to <strong>{newName}</strong>, and stops
-      receiving payments.
+      This sends your balance to your new wallet and points
+      <strong>{user.username}@coinos.io</strong> at it, so payments to your address arrive
+      there from now on. This account stays exactly as it is — same name, same history —
+      you just receive on coinos v3.
     </p>
 
     <div class="rounded-xl border p-3 space-y-1">
@@ -76,7 +76,7 @@
           name="pin" placeholder="Your PIN" />
       {/if}
       <button class="btn btn-primary w-full" disabled={working}>
-        {#if working}Moving…{:else}Move {balance.toLocaleString()} sats and release {user.username}{/if}
+        {#if working}Moving…{:else}Move my balance and address to coinos v3{/if}
       </button>
     </form>