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

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,