The third custody tier keeps exits cheap by depth, not by date: "Keep my exit cheap" renews a coin once its history is four hops deep

Why: a unilateral exit publishes one on-chain transaction per off-chain hop, so depth — not age — is what makes an exit expensive, and a renewal a week before expiry flattens exactly the same history a renewal in the last hours does. The week-ahead "early" tier only guarded against the server being unreachable at the very end, which is not the case worth selling. (Adam, 2026-10-23.)

exit = self (last-hours renewal, free bracket + base, the same grid-snapped backstop) plus: any coin whose genesis chain is 4+ hops deep is renewed in the next round the app runs, paying the top bracket + base — but only when that fee is under a tenth of the coin (flattening a 21-sat coin for 300 sats helps nobody; its exit is uneconomic anyway). Deep coins ride along with an expiry renewal when one is due, or get a round of their own. The server-side backstop stays near-expiry only: depth changes only while the wallet transacts, i.e. while the app is open. A stored 'early' reads as 'exit'. Card copy says what the hop count means and what the two prices are for.

Co-Authored-By: Claude Fable 5.1 <[email protected]>

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