From: Matt Corallo <git@bluematt.me>
Date: Wed, 6 Nov 2024 15:41:47 +0000 (+0000)
Subject: Limit `full_stack` fuzz runtime by limiting block connection ops
X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=commitdiff_plain;h=ea12e77b1c26fac1b2dafb99a32805a0b5ae6b7a;p=rust-lightning

Limit `full_stack` fuzz runtime by limiting block connection ops
---

diff --git a/fuzz/src/full_stack.rs b/fuzz/src/full_stack.rs
index be40af501..6fd444c2b 100644
--- a/fuzz/src/full_stack.rs
+++ b/fuzz/src/full_stack.rs
@@ -309,6 +309,14 @@ impl<'a> MoneyLossDetector<'a> {
 	}
 
 	fn connect_block(&mut self, all_txn: &[Transaction]) {
+		if self.blocks_connected > 100_000 {
+			// Connecting blocks is relatively slow, and some commands can connect many blocks.
+			// This can inflate the total runtime substantially, leading to spurious timeouts.
+			// Instead, because block connection rate is expected to be limited by PoW, simply
+			// start ignoring blocks after the first 100k.
+			return;
+		}
+
 		let mut txdata = Vec::with_capacity(all_txn.len());
 		for (idx, tx) in all_txn.iter().enumerate() {
 			let txid = tx.compute_txid();