1 files changed, 20 insertions, 0 deletions
diff --git a/tools/receive-batch-fold-test.js b/tools/receive-batch-fold-test.js
new file mode 100644
index 0000000..8e38265
--- /dev/null
+++ b/tools/receive-batch-fold-test.js
@@ -0,0 +1,20 @@
+// One payment delivered as several coins — a gift whose 886 sats sat in two
+// (595 + 291, dust padding) swept in one claim — is one Received row.
+// sameDelivery decides which receive rows fold; nothing else does.
+// Run: bun tools/receive-batch-fold-test.js
+import { sameDelivery } from '../src/ark/manager.js';
+let ok = true;
+const check = (n, c) => { console.log(` ${c ? '✓' : '✗'} ${n}`); if (!c) ok = false; };
+const T = 1_790_000_000_000;
+const rcv = (id, sat, ts, extra = {}) => ({ id, type: 'receive', status: 'complete', amountSat: sat, ts, vtxoId: 'v-' + id, ...extra });
+check('two coins of one mailbox message fold', sameDelivery(rcv('a', 595, T, { batch: '7' }), rcv('b', 291, T, { batch: '7' })));
+check('...even when their instants differ (live, no checkpoint time)', sameDelivery(rcv('a', 595, T, { batch: '7' }), rcv('b', 291, T + 40, { batch: '7' })));
+check('two messages stay two rows, same instant or not', !sameDelivery(rcv('a', 595, T, { batch: '7' }), rcv('b', 291, T, { batch: '8' })));
+check('a stamped row never folds an unstamped one', !sameDelivery(rcv('a', 595, T, { batch: '7' }), rcv('b', 291, T)));
+check('older rows (no stamp) fold on the same delivery instant', sameDelivery(rcv('a', 595, T), rcv('b', 291, T)));
+check('...not a millisecond apart', !sameDelivery(rcv('a', 595, T), rcv('b', 291, T + 1)));
+check('a ⚡ receive is its own payment', !sameDelivery(rcv('a', 595, T, { batch: '7' }), rcv('b', 291, T, { batch: '7', viaLn: true })));
+check('a rejected coin is not part of the payment', !sameDelivery(rcv('a', 595, T, { batch: '7' }), rcv('b', 291, T, { batch: '7', status: 'rejected' })));
+check('only receives fold', !sameDelivery({ ...rcv('a', 595, T), type: 'send' }, rcv('b', 291, T)));
+console.log(ok ? '\n✅ one delivery, one row' : '\n❌ failed');
+process.exit(ok ? 0 : 1);