Eighteen of twenty-two leaves were uneconomic even at 1 sat/vB

What the evidence shows

Technical and product details

1. Documented behavior

   In the same 100,000-sat case, 18 leaves holding 9,888 sats cost more to exit than their value at 1 sat/vB. 1

   Supporting material shown on this page

   Blink mainnet case studyPinned source code · github.com · checked 2026-07-14

   1# Case study: a real Spark unilateral exit on Bitcoin mainnet

2. Technical details

   Only four leaves holding 90,112 sats were selected; a complete exit was estimated at about 77,500 sats in fees. 1

   Supporting material shown on this page

   Blink mainnet case studyPinned source code · github.com · checked 2026-07-14

   1# Case study: a real Spark unilateral exit on Bitcoin mainnet

3. Projected selected result

   The plan left 9,888 sats behind and projected 89,668 sats at the destination. Because 8,388 sats of CPFP fees came from separate L1 bitcoin, projected net economic recovery was only 81,280 sats before the funding transaction's fee. 1

   Supporting material shown on this page

   Blink mainnet case studyPinned source code · github.com · checked 2026-07-14

   1# Case study: a real Spark unilateral exit on Bitcoin mainnet

Scope control

What this does not establish

• Large leaves can be economical at low fees; the fact is that a wallet's displayed balance can include many practically stranded fragments. 1

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.