From cce4df351c1912654e31c51a11a1bc8950e60cc3 Mon Sep 17 00:00:00 2001
From: Bastien Teinturier <31281497+t-bast@users.noreply.github.com>
Date: Fri, 3 May 2024 17:23:07 +0200
Subject: [PATCH] Increase maximum `cltv_expiry_delta` (#635)

We allow `cltv_expiry_delta` up to two weeks, to align with other
implementations. This allows using a larger trampoline expiry delta,
which will reduce the frequency of force-closed channels because a
wallet doesn't come back online in time to settle one of their HTLCs.
---
 .../kotlin/fr/acinq/lightning/channel/states/Channel.kt         | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/commonMain/kotlin/fr/acinq/lightning/channel/states/Channel.kt b/src/commonMain/kotlin/fr/acinq/lightning/channel/states/Channel.kt
index b0f57c89b..50217a5f1 100644
--- a/src/commonMain/kotlin/fr/acinq/lightning/channel/states/Channel.kt
+++ b/src/commonMain/kotlin/fr/acinq/lightning/channel/states/Channel.kt
@@ -665,7 +665,7 @@ object Channel {
 
     // this is defined in BOLT 11
     val MIN_CLTV_EXPIRY_DELTA = CltvExpiryDelta(18)
-    val MAX_CLTV_EXPIRY_DELTA = CltvExpiryDelta(7 * 144) // one week
+    val MAX_CLTV_EXPIRY_DELTA = CltvExpiryDelta(2 * 7 * 144) // two weeks
 
     // since BOLT 1.1, there is a max value for the refund delay of the main commitment tx
     val MAX_TO_SELF_DELAY = CltvExpiryDelta(2016)