X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=blobdiff_plain;f=lightning%2Fsrc%2Fln%2Fchannel.rs;h=f6767e8a7d46555cecb48592ee52200aa4b53ded;hb=0beaaa76dee796a367436518a734d7f4f3bd6f4b;hp=1cb7a689a21a1b710413e93afbba8e1881d48e90;hpb=dc8479a6202ea84489e51cba020a600f0a2b9695;p=rust-lightning diff --git a/lightning/src/ln/channel.rs b/lightning/src/ln/channel.rs index 1cb7a689..f6767e8a 100644 --- a/lightning/src/ln/channel.rs +++ b/lightning/src/ln/channel.rs @@ -39,7 +39,7 @@ use util::events::ClosureReason; use util::ser::{Readable, ReadableArgs, Writeable, Writer, VecWriter}; use util::logger::Logger; use util::errors::APIError; -use util::config::{UserConfig, ChannelConfig, ChannelHandshakeLimits}; +use util::config::{UserConfig, ChannelConfig, ChannelHandshakeConfig, ChannelHandshakeLimits}; use util::scid_utils::scid_from_parts; use io; @@ -745,6 +745,12 @@ pub const COMMITMENT_TX_WEIGHT_PER_HTLC: u64 = 172; pub const ANCHOR_OUTPUT_VALUE_SATOSHI: u64 = 330; +/// The percentage of the channel value `holder_max_htlc_value_in_flight_msat` used to be set to, +/// before this was made configurable. The percentage was made configurable in LDK 0.0.107, +/// although LDK 0.0.104+ enabled serialization of channels with a different value set for +/// `holder_max_htlc_value_in_flight_msat`. +pub const MAX_IN_FLIGHT_PERCENT_LEGACY: u8 = 10; + /// Maximum `funding_satoshis` value according to the BOLT #2 specification, if /// `option_support_large_channel` (aka wumbo channels) is not supported. /// It's 2^24 - 1. @@ -803,9 +809,22 @@ macro_rules! secp_check { } impl Channel { - // Convert constants + channel value to limits: - fn get_holder_max_htlc_value_in_flight_msat(channel_value_satoshis: u64) -> u64 { - channel_value_satoshis * 1000 / 10 //TODO + /// Returns the value to use for `holder_max_htlc_value_in_flight_msat` as a percentage of the + /// `channel_value_satoshis` in msat, set through + /// [`ChannelHandshakeConfig::max_inbound_htlc_value_in_flight_percent_of_channel`] + /// + /// The effective percentage is lower bounded by 1% and upper bounded by 100%. + /// + /// [`ChannelHandshakeConfig::max_inbound_htlc_value_in_flight_percent_of_channel`]: crate::util::config::ChannelHandshakeConfig::max_inbound_htlc_value_in_flight_percent_of_channel + fn get_holder_max_htlc_value_in_flight_msat(channel_value_satoshis: u64, config: &ChannelHandshakeConfig) -> u64 { + let configured_percent = if config.max_inbound_htlc_value_in_flight_percent_of_channel < 1 { + 1 + } else if config.max_inbound_htlc_value_in_flight_percent_of_channel > 100 { + 100 + } else { + config.max_inbound_htlc_value_in_flight_percent_of_channel as u64 + }; + channel_value_satoshis * 10 * configured_percent } /// Returns a minimum channel reserve value the remote needs to maintain, @@ -964,7 +983,7 @@ impl Channel { counterparty_dust_limit_satoshis: 0, holder_dust_limit_satoshis: MIN_CHAN_DUST_LIMIT_SATOSHIS, counterparty_max_htlc_value_in_flight_msat: 0, - holder_max_htlc_value_in_flight_msat: Self::get_holder_max_htlc_value_in_flight_msat(channel_value_satoshis), + holder_max_htlc_value_in_flight_msat: Self::get_holder_max_htlc_value_in_flight_msat(channel_value_satoshis, &config.own_channel_config), counterparty_selected_channel_reserve_satoshis: None, // Filled in in accept_channel holder_selected_channel_reserve_satoshis, counterparty_htlc_minimum_msat: 0, @@ -1282,7 +1301,7 @@ impl Channel { counterparty_dust_limit_satoshis: msg.dust_limit_satoshis, holder_dust_limit_satoshis: MIN_CHAN_DUST_LIMIT_SATOSHIS, counterparty_max_htlc_value_in_flight_msat: cmp::min(msg.max_htlc_value_in_flight_msat, msg.funding_satoshis * 1000), - holder_max_htlc_value_in_flight_msat: Self::get_holder_max_htlc_value_in_flight_msat(msg.funding_satoshis), + holder_max_htlc_value_in_flight_msat: Self::get_holder_max_htlc_value_in_flight_msat(msg.funding_satoshis, &config.own_channel_config), counterparty_selected_channel_reserve_satoshis: Some(msg.channel_reserve_satoshis), holder_selected_channel_reserve_satoshis, counterparty_htlc_minimum_msat: msg.htlc_minimum_msat, @@ -5877,13 +5896,18 @@ impl Writeable for Channel { let chan_type = if self.channel_type != ChannelTypeFeatures::only_static_remote_key() { Some(&self.channel_type) } else { None }; - // The same logic applies for `holder_selected_channel_reserve_satoshis` and - // `holder_max_htlc_value_in_flight_msat` values other than the defaults. + // The same logic applies for `holder_selected_channel_reserve_satoshis` values other than + // the default, and when `holder_max_htlc_value_in_flight_msat` is configured to be set to + // a different percentage of the channel value then 10%, which older versions of LDK used + // to set it to before the percentage was made configurable. let serialized_holder_selected_reserve = if self.holder_selected_channel_reserve_satoshis != Self::get_holder_selected_channel_reserve_satoshis(self.channel_value_satoshis) { Some(self.holder_selected_channel_reserve_satoshis) } else { None }; + + let mut old_max_in_flight_percent_config = UserConfig::default().own_channel_config; + old_max_in_flight_percent_config.max_inbound_htlc_value_in_flight_percent_of_channel = MAX_IN_FLIGHT_PERCENT_LEGACY; let serialized_holder_htlc_max_in_flight = - if self.holder_max_htlc_value_in_flight_msat != Self::get_holder_max_htlc_value_in_flight_msat(self.channel_value_satoshis) + if self.holder_max_htlc_value_in_flight_msat != Self::get_holder_max_htlc_value_in_flight_msat(self.channel_value_satoshis, &old_max_in_flight_percent_config) { Some(self.holder_max_htlc_value_in_flight_msat) } else { None }; write_tlv_fields!(writer, { @@ -6153,7 +6177,7 @@ impl<'a, Signer: Sign, K: Deref> ReadableArgs<(&'a K, u32)> for Channel let mut target_closing_feerate_sats_per_kw = None; let mut monitor_pending_finalized_fulfills = Some(Vec::new()); let mut holder_selected_channel_reserve_satoshis = Some(Self::get_holder_selected_channel_reserve_satoshis(channel_value_satoshis)); - let mut holder_max_htlc_value_in_flight_msat = Some(Self::get_holder_max_htlc_value_in_flight_msat(channel_value_satoshis)); + let mut holder_max_htlc_value_in_flight_msat = Some(Self::get_holder_max_htlc_value_in_flight_msat(channel_value_satoshis, &UserConfig::default().own_channel_config)); // Prior to supporting channel type negotiation, all of our channels were static_remotekey // only, so we default to that if none was written. let mut channel_type = Some(ChannelTypeFeatures::only_static_remote_key());