Bump default CSV delay on counterparty states to 3 days of blocks

Author: Antoine Riard

lightning/src/util/config.rs

@@ -45,8 +45,11 @@ pub struct ChannelHandshakeConfig {
 	/// case of an honest unilateral channel close, which implicitly decrease the economic value of
 	/// our channel.
 	///
-	/// Default value: [`BREAKDOWN_TIMEOUT`], we enforce it as a minimum at channel opening so you
-	/// can tweak config to ask for more security, not less.
+	/// Default value: [`BREAKDOWN_TIMEOUT`] * 3, we enforce it as a minimum at channel opening so you
+	/// can tweak config to ask for more security, not less. The value has been bumped to 3 days of blocks
+	/// in 0.0.113 as the maturity of LN security infrastructure and incident response human reactivity across
+	/// the Bitcoin ecosystem, especially in case of needed coordination across layers, are still evaluated as
+	/// both young.
 	pub our_to_self_delay: u16,
 	/// Set to the smallest value HTLC we will accept to process.
 	///
@@ -156,7 +159,7 @@ impl Default for ChannelHandshakeConfig {
 	fn default() -> ChannelHandshakeConfig {
 		ChannelHandshakeConfig {
 			minimum_depth: 6,
-			our_to_self_delay: BREAKDOWN_TIMEOUT,
+			our_to_self_delay: BREAKDOWN_TIMEOUT * 3,
 			our_htlc_minimum_msat: 1,
 			max_inbound_htlc_value_in_flight_percent_of_channel: 10,
 			negotiate_scid_privacy: false,