From: Matt Corallo <git@bluematt.me>
Date: Sat, 7 Sep 2024 13:26:36 +0000 (+0000)
Subject: Make ignoring duplicates `PackageTemplate` claims more robust
X-Git-Url: http://git.bitcoin.ninja/?a=commitdiff_plain;h=eec6ca9887d0359cc9e3fe45dbc430793efa2336;p=rust-lightning

Make ignoring duplicates `PackageTemplate` claims more robust

`update_claims_view_from_requests` assumes that any
`PackageTemplate`s passed to it will not be aggregated (i.e. have
only one input) and uses that assumption when skipping duplicates.

This is currently true, but dropping `PackateTemplate` claims
entirely based on only the first input is somewhat brittle so we
add a debug assertion here and update the logic to not spuriously
drop claims if they happen to come into the `OnChainTxHandler`
pre-aggregated.
---

diff --git a/lightning/src/chain/onchaintx.rs b/lightning/src/chain/onchaintx.rs
index 9ebf02252..791972467 100644
--- a/lightning/src/chain/onchaintx.rs
+++ b/lightning/src/chain/onchaintx.rs
@@ -739,7 +739,18 @@ impl<ChannelSigner: EcdsaChannelSigner> OnchainTxHandler<ChannelSigner> {
 
 		// First drop any claims which are duplicate
 		requests.retain(|req| {
-			if self.claimable_outpoints.get(req.outpoints()[0]).is_some() {
+			debug_assert_eq!(
+				req.outpoints().len(),
+				1,
+				"Claims passed to `update_claims_view_from_requests` should not be aggregated"
+			);
+			let mut all_outpoints_claiming = true;
+			for outpoint in req.outpoints() {
+				if self.claimable_outpoints.get(&outpoint).is_none() {
+					all_outpoints_claiming = false;
+				}
+			}
+			if all_outpoints_claiming {
 				log_info!(logger, "Ignoring second claim for outpoint {}:{}, already registered its claiming request", req.outpoints()[0].txid, req.outpoints()[0].vout);
 				false
 			} else {