Test that we do not fail-backwards HTLCs that the remote on-chained

[rust-lightning] / src / ln / channelmonitor.rs

diff --git a/src/ln/channelmonitor.rs b/src/ln/channelmonitor.rs
index f037c673079b2b0071697c012bbbac3d4d4d850d..ded2a99dc37cf2933150d8537ec31ecfaddc073e 100644 (file)
--- a/src/ln/channelmonitor.rs
+++ b/src/ln/channelmonitor.rs
@@ -63,6 +63,9 @@ pub trait ManyChannelMonitor: Send + Sync {
 /// If you're using this for local monitoring of your own channels, you probably want to use
 /// `OutPoint` as the key, which will give you a ManyChannelMonitor implementation.
 pub struct SimpleManyChannelMonitor<Key> {
+       #[cfg(test)] // Used in ChannelManager tests to manipulate channels directly
+       pub monitors: Mutex<HashMap<Key, ChannelMonitor>>,
+       #[cfg(not(test))]
        monitors: Mutex<HashMap<Key, ChannelMonitor>>,
        chain_monitor: Arc<ChainWatchInterface>,
        broadcaster: Arc<BroadcasterInterface>
@@ -1222,7 +1225,7 @@ impl ChannelMonitor {
                        };
                }
 
-               let secret = self.get_secret(commitment_number).unwrap();
+               let secret = ignore_error!(self.get_secret(commitment_number));
                let per_commitment_key = ignore_error!(SecretKey::from_slice(&self.secp_ctx, &secret));
                let per_commitment_point = PublicKey::from_secret_key(&self.secp_ctx, &per_commitment_key);
                let revocation_pubkey = match self.key_storage {
@@ -1269,7 +1272,6 @@ impl ChannelMonitor {
                                output: outputs,
                        };
 
-
                        let sighash_parts = bip143::SighashComponents::new(&spend_tx);
 
                        let sig = match self.key_storage {
@@ -1352,9 +1354,14 @@ impl ChannelMonitor {
        fn block_connected(&self, txn_matched: &[&Transaction], height: u32, broadcaster: &BroadcasterInterface)-> Vec<(Sha256dHash, Vec<TxOut>)> {
                let mut watch_outputs = Vec::new();
                for tx in txn_matched {
-                       let mut txn: Vec<Transaction> = Vec::new();
-                       for txin in tx.input.iter() {
-                               if self.funding_txo.is_none() || (txin.previous_output.txid == self.funding_txo.as_ref().unwrap().0.txid && txin.previous_output.vout == self.funding_txo.as_ref().unwrap().0.index as u32) {
+                       if tx.input.len() == 1 {
+                               // Assuming our keys were not leaked (in which case we're screwed no matter what),
+                               // commitment transactions and HTLC transactions will all only ever have one input,
+                               // which is an easy way to filter out any potential non-matching txn for lazy
+                               // filters.
+                               let prevout = &tx.input[0].previous_output;
+                               let mut txn: Vec<Transaction> = Vec::new();
+                               if self.funding_txo.is_none() || (prevout.txid == self.funding_txo.as_ref().unwrap().0.txid && prevout.vout == self.funding_txo.as_ref().unwrap().0.index as u32) {
                                        let (remote_txn, new_outputs) = self.check_spend_remote_transaction(tx, height);
                                        txn = remote_txn;
                                        if !new_outputs.1.is_empty() {