Registrar: a migrated legacy name is claimable

takenByCoinosUser now reads the account it finds: a live one still
blocks the name, but one flagged migrated has handed receiving over, so
v3 may claim it.

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

1 files changed, 5 insertions, 1 deletions

diff --git a/names/server.js b/names/server.js
index 74bcb9b..3ebfa48 100644
--- a/names/server.js
+++ b/names/server.js
@@ -376,7 +376,11 @@ async function takenByCoinosUser(domain, name) {
   if (domain !== 'coinos.io') return false;
   try {
     const r = await fetch(`https://coinos.io/api/users/${encodeURIComponent(name)}`);
-    return r.status === 200;
+    if (r.status !== 200) return false;
+    // A migrated account has handed its name over: the old site keeps the
+    // account and its history, but receiving belongs to us now.
+    const u = await r.json().catch(() => null);
+    return !(u && u.migrated);
   } catch { return true; } // can't verify → refuse rather than squat
 }