Panic on txn with value > 21mill in ChannelMonitor::block_connected

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

diff --git a/lightning/src/ln/channelmonitor.rs b/lightning/src/ln/channelmonitor.rs
index 70f11405d0cb8399beb1c540acbe84ff20955982..c96c30cbeee448f0c8067eef0561b51b3a8b0455 100644 (file)
--- a/lightning/src/ln/channelmonitor.rs
+++ b/lightning/src/ln/channelmonitor.rs
@@ -2334,6 +2334,15 @@ impl ChannelMonitor {
        }
 
        fn block_connected(&mut self, txn_matched: &[&Transaction], height: u32, block_hash: &Sha256dHash, broadcaster: &BroadcasterInterface, fee_estimator: &FeeEstimator)-> (Vec<(Sha256dHash, Vec<TxOut>)>, Vec<SpendableOutputDescriptor>, Vec<(HTLCSource, Option<PaymentPreimage>, PaymentHash)>) {
+               for tx in txn_matched {
+                       let mut output_val = 0;
+                       for out in tx.output.iter() {
+                               if out.value > 21_000_000_0000_0000 { panic!("Value-overflowing transaction provided to block connected"); }
+                               output_val += out.value;
+                               if output_val > 21_000_000_0000_0000 { panic!("Value-overflowing transaction provided to block connected"); }
+                       }
+               }
+
                log_trace!(self, "Block {} at height {} connected with {} txn matched", block_hash, height, txn_matched.len());
                let mut watch_outputs = Vec::new();
                let mut spendable_outputs = Vec::new();