Blink's Weekly Brief described seed-only recovery and an unswept amount as received

What the evidence shows

Technical and product details

1. Published description

   Blink's July 10 Weekly Brief said the exit was completed “using only the seed, with no operators online” and that 89,668 sats reached the destination. 1

   Supporting material shown on this page

   Blink Weekly BriefBlog or announcement · blink.sv · checked 2026-07-14
2. Recovery-state requirement

   The linked case study states that Operators must still be online when a complete, current recovery bundle is created; after they are offline, a seed alone cannot rediscover the current leaves. 2

   Supporting material shown on this page

   case-study recovery statePinned source code · github.com · checked 2026-07-14

   22leaves cannot be discovered from the seed alone. The exit needs a **recovery
   23bundle** — a JSON snapshot of the wallet's leaves and their ancestor
   24transactions — refreshed while operators are still online:
   25
   26```sh
   27make refresh-recovery-bundle SEED_FILE=../.spark-seed.txt BUNDLE=../recovery-bundle.json
   28```

3. Completion-status mismatch

   The Brief said 89,668 sats reached the destination. Step 6 of the linked case study said the four selected exits were still waiting for refund maturity and described refund broadcast and sweeping as future operations. 13

   Supporting material shown on this page

   Blink Weekly BriefBlog or announcement · blink.sv · checked 2026-07-14

   case-study Step 6Pinned source code · github.com · checked 2026-07-14

   189After the loop finishes, each economical leaf's refund waits out its CSV
   190timelock. Re-running the same `make recover` after maturity broadcasts the
   191refunds; once they confirm, `make sweep` builds and signs one-input Taproot
   192key-path spends from the refund outputs to any destination address, and
   193`broadcast-sweep` pushes them as ordinary transactions. At the time of
   194writing, this wallet's four economical exits are through their chains and
   195waiting on refund maturity.

4. Source inconsistency

   Earlier portions of the same case study use “confirmed,” “arrives,” and “reach” language. Its explicit “At the time of writing” checkpoint nevertheless records the refunds as unswept. This review uses that status checkpoint when distinguishing completed transactions from projections. 3

   Supporting material shown on this page

   case-study Step 6Pinned source code · github.com · checked 2026-07-14

   189After the loop finishes, each economical leaf's refund waits out its CSV
   190timelock. Re-running the same `make recover` after maturity broadcasts the
   191refunds; once they confirm, `make sweep` builds and signs one-input Taproot
   192key-path spends from the refund outputs to any destination address, and
   193`broadcast-sweep` pushes them as ordinary transactions. At the time of
   194writing, this wallet's four economical exits are through their chains and
   195waiting on refund maturity.

5. Accounting distinction

   Even as a projected destination output, 89,668 sats is not net economic recovery because 8,388 sats of CPFP fees came from separate on-chain bitcoin. 4

   Supporting material shown on this page

   case-study accountingPinned source code · github.com · checked 2026-07-14

   111| **arrives at the destination address** | **89,668** |
   112| dust in 18 uneconomical leaves, left behind in Spark | 9,888 |
   113
   114Spark exit and refund transactions are pre-signed with **zero fee** (fees ride
   115the CPFP anchors), so each refund output carries the full leaf value; the only
   116deduction from the wallet balance itself is the final sweep fee.

Scope control

What this does not establish

• Real mainnet exit packages were advanced without later Operator cooperation. The discrepancy concerns prior state acquisition, final-sweep completion, and economic accounting—not whether the package sequence began. 23

Sources and excerpts

Primary sources

The relevant details and available source-code excerpts appear alongside the claims above. This list preserves the complete original-source trail for independent verification.