From 3f6315242a7ceb160c12f6997f5c020362424877 Mon Sep 17 00:00:00 2001
From: yyforyongyu <yy2452@columbia.edu>
Date: Fri, 24 Feb 2023 01:25:53 +0800
Subject: [PATCH] funding: fix itest flake with pending channels

---
 funding/manager.go | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/funding/manager.go b/funding/manager.go
index 0f65e920e..2d702ba48 100644
--- a/funding/manager.go
+++ b/funding/manager.go
@@ -108,6 +108,11 @@ const (
 	// for the funding transaction to be confirmed before forgetting
 	// channels that aren't initiated by us. 2016 blocks is ~2 weeks.
 	maxWaitNumBlocksFundingConf = 2016
+
+	// pendingChansLimit is the maximum number of pending channels that we
+	// can have. After this point, pending channel opens will start to be
+	// rejected.
+	pendingChansLimit = 1_000
 )
 
 var (
@@ -1320,6 +1325,25 @@ func (f *Manager) handleFundingOpen(peer lnpeer.Peer,
 		return
 	}
 
+	// Ensure that the pendingChansLimit is respected.
+	pendingChans, err := f.cfg.Wallet.Cfg.Database.FetchPendingChannels()
+	if err != nil {
+		f.failFundingFlow(
+			peer, msg.PendingChannelID, err,
+		)
+
+		return
+	}
+
+	if len(pendingChans) > pendingChansLimit {
+		f.failFundingFlow(
+			peer, msg.PendingChannelID,
+			lnwire.ErrMaxPendingChannels,
+		)
+
+		return
+	}
+
 	// We'll also reject any requests to create channels until we're fully
 	// synced to the network as we won't be able to properly validate the
 	// confirmation of the funding transaction.