Merge pull request #2330 from wvanlint/partial_config_updates

[rust-lightning] / lightning / src / util / config.rs

diff --git a/lightning/src/util/config.rs b/lightning/src/util/config.rs
index 1e678152cccd9d3cfa4bdcc1d40dd441b739913e..758306c002d1a031199b0ca38b43a5decddca4ac 100644 (file)
--- a/lightning/src/util/config.rs
+++ b/lightning/src/util/config.rs
@@ -399,6 +399,27 @@ pub struct ChannelConfig {
        pub force_close_avoidance_max_fee_satoshis: u64,
 }
 
+impl ChannelConfig {
+       /// Applies the given [`ChannelConfigUpdate`] as a partial update to the [`ChannelConfig`].
+       pub fn apply(&mut self, update: &ChannelConfigUpdate) {
+               if let Some(forwarding_fee_proportional_millionths) = update.forwarding_fee_proportional_millionths {
+                       self.forwarding_fee_proportional_millionths = forwarding_fee_proportional_millionths;
+               }
+               if let Some(forwarding_fee_base_msat) = update.forwarding_fee_base_msat {
+                       self.forwarding_fee_base_msat = forwarding_fee_base_msat;
+               }
+               if let Some(cltv_expiry_delta) = update.cltv_expiry_delta {
+                       self.cltv_expiry_delta = cltv_expiry_delta;
+               }
+               if let Some(max_dust_htlc_exposure_msat) = update.max_dust_htlc_exposure_msat {
+                       self.max_dust_htlc_exposure_msat = max_dust_htlc_exposure_msat;
+               }
+               if let Some(force_close_avoidance_max_fee_satoshis) = update.force_close_avoidance_max_fee_satoshis {
+                       self.force_close_avoidance_max_fee_satoshis = force_close_avoidance_max_fee_satoshis;
+               }
+       }
+}
+
 impl Default for ChannelConfig {
        /// Provides sane defaults for most configurations (but with zero relay fees!).
        fn default() -> Self {
@@ -423,6 +444,40 @@ impl_writeable_tlv_based!(ChannelConfig, {
        (10, force_close_avoidance_max_fee_satoshis, required),
 });
 
+/// A parallel struct to [`ChannelConfig`] to define partial updates.
+#[allow(missing_docs)]
+pub struct ChannelConfigUpdate {
+       pub forwarding_fee_proportional_millionths: Option<u32>,
+       pub forwarding_fee_base_msat: Option<u32>,
+       pub cltv_expiry_delta: Option<u16>,
+       pub max_dust_htlc_exposure_msat: Option<u64>,
+       pub force_close_avoidance_max_fee_satoshis: Option<u64>,
+}
+
+impl Default for ChannelConfigUpdate {
+       fn default() -> ChannelConfigUpdate {
+               ChannelConfigUpdate {
+                       forwarding_fee_proportional_millionths: None,
+                       forwarding_fee_base_msat: None,
+                       cltv_expiry_delta: None,
+                       max_dust_htlc_exposure_msat: None,
+                       force_close_avoidance_max_fee_satoshis: None,
+               }
+       }
+}
+
+impl From<ChannelConfig> for ChannelConfigUpdate {
+       fn from(config: ChannelConfig) -> ChannelConfigUpdate {
+               ChannelConfigUpdate {
+                       forwarding_fee_proportional_millionths: Some(config.forwarding_fee_proportional_millionths),
+                       forwarding_fee_base_msat: Some(config.forwarding_fee_base_msat),
+                       cltv_expiry_delta: Some(config.cltv_expiry_delta),
+                       max_dust_htlc_exposure_msat: Some(config.max_dust_htlc_exposure_msat),
+                       force_close_avoidance_max_fee_satoshis: Some(config.force_close_avoidance_max_fee_satoshis),
+               }
+       }
+}
+
 /// Legacy version of [`ChannelConfig`] that stored the static
 /// [`ChannelHandshakeConfig::announced_channel`] and
 /// [`ChannelHandshakeConfig::commit_upfront_shutdown_pubkey`] fields.