Spending: one coin, one "Received" row — across devices. The Daniel still saw four "Received 1,000" rows and "Payment received! 4,000" for what the ASP shows is a single 1,000 sat coin (and two rows for his 1,005). A receive movement is recorded by every device or tab that sees the coin arrive, each under its own id, and the cross-device merge unions movements by id — so each kept its own row, and the registrar-receipt tagging marked some ⚡. lnFoldedIds now also folds receives of the same coin: the ⚡-tagged one stays (its icon is right), else the earliest. Same read-time derivation as the claim twins (history, celebration, arkMovements, LN tagging), so nothing is deleted and no synced copy brings a twin back.

Co-Authored-By: Claude Opus 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01Vps2H27rhbG9ZqseGfMrc3

1 files changed, 8 insertions, 0 deletions

diff --git a/tools/ln-receive-twin-test.js b/tools/ln-receive-twin-test.js
index bbec971..20d4f48 100644
--- a/tools/ln-receive-twin-test.js
+++ b/tools/ln-receive-twin-test.js
@@ -27,5 +27,13 @@ f = lnFoldedIds([ln('L1', 500, T), ln('L2', 500, T + 5000), rcv('R1', 500, T + 1
 check('two claims of one amount fold one receive each', f.has('R1') && f.has('R2') && f.size === 2);
 f = lnFoldedIds([rcv('R', 1005, T), rcv('S', 2000, T)]);
 check('plain receives with no claim stay', f.size === 0);
+// the same coin recorded by two devices (each its own movement id), one of
+// them tagged ⚡ by the registrar's receipts: one row, the tagged one
+f = lnFoldedIds([rcv('A', 1000, T), { ...rcv('B', 1000, T + 2000), vtxoId: 'v-A', viaLn: true }, { ...rcv('C', 1000, T + 3000), vtxoId: 'v-A' }, { ...rcv('D', 1000, T + 4000), vtxoId: 'v-A', viaLn: true }]);
+check('one coin recorded four times shows once, the ⚡ copy', f.size === 3 && !f.has('B'), [...f].join(','));
+f = lnFoldedIds([rcv('A', 1000, T), { ...rcv('B', 1000, T + 2000), vtxoId: 'v-A' }]);
+check('...or the earliest when none is tagged', f.size === 1 && f.has('B'));
+f = lnFoldedIds([rcv('A', 1000, T), rcv('B', 1000, T + 2000)]);
+check('two coins of the same amount stay two rows', f.size === 0);
 console.log(ok ? '\n✅ a claimed LN receive is told once' : '\n❌ failed');
 process.exit(ok ? 0 : 1);