# Class BSV::Wallet::Store::Models::SseCursor <a id="class-BSV-Wallet-Store-Models-SseCursor"></a>

**Inherits:** `Sequel::Model`

Persistence row for Arcade SSE listener cursors. The token (PK) is a
wallet-derived callbackToken (HMAC-from-WIF via
+BSV::Wallet::CallbackToken#derive+) that the wallet supplies to Arcade for
callback scoping; last_event_id is the SSE frame id (nanosecond timestamp) of
the most recently bus-pushed event. No FK -- the token is an external
identifier, not a row in any other wallet table. See
db/migrations/010_sse_cursors.rb and #251 / #262.