X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=blobdiff_plain;f=lightning%2Fsrc%2Futil%2Fconfig.rs;h=3868d29aab49f66789c49c970a662cba19000e2e;hb=132b07239784749dcadfc2959a9487107789df56;hp=bd8b40b66567e8a5346e8e551568aaf1d539eae5;hpb=7671ae54522197dbca495c4c7b3fec5c814a1841;p=rust-lightning

diff --git a/lightning/src/util/config.rs b/lightning/src/util/config.rs
index bd8b40b6..3868d29a 100644
--- a/lightning/src/util/config.rs
+++ b/lightning/src/util/config.rs
@@ -10,6 +10,7 @@
 //! Various user-configurable channel limits and settings which ChannelManager
 //! applies for you.
 
+use ln::channel::MAX_FUNDING_SATOSHIS_NO_WUMBO;
 use ln::channelmanager::{BREAKDOWN_TIMEOUT, MAX_LOCAL_BREAKDOWN_TIMEOUT};
 
 /// Configuration we set when applicable.
@@ -47,6 +48,30 @@ pub struct ChannelHandshakeConfig {
 	/// Default value: 1. If the value is less than 1, it is ignored and set to 1, as is required
 	/// by the protocol.
 	pub our_htlc_minimum_msat: u64,
+	/// Sets the percentage of the channel value we will cap the total value of outstanding inbound
+	/// HTLCs to.
+	///
+	/// This can be set to a value between 1-100, where the value corresponds to the percent of the
+	/// channel value in whole percentages.
+	///
+	/// Note that:
+	/// * If configured to another value than the default value 10, any new channels created with
+	/// the non default value will cause versions of LDK prior to 0.0.104 to refuse to read the
+	/// `ChannelManager`.
+	///
+	/// * This caps the total value for inbound HTLCs in-flight only, and there's currently
+	/// no way to configure the cap for the total value of outbound HTLCs in-flight.
+	///
+	/// * The requirements for your node being online to ensure the safety of HTLC-encumbered funds
+	/// are different from the non-HTLC-encumbered funds. This makes this an important knob to
+	/// restrict exposure to loss due to being offline for too long.
+	/// See [`ChannelHandshakeConfig::our_to_self_delay`] and [`ChannelConfig::cltv_expiry_delta`]
+	/// for more information.
+	///
+	/// Default value: 10.
+	/// Minimum value: 1, any values less than 1 will be treated as 1 instead.
+	/// Maximum value: 100, any values larger than 100 will be treated as 100 instead.
+	pub max_inbound_htlc_value_in_flight_percent_of_channel: u8,
 	/// If set, we attempt to negotiate the `scid_privacy` (referred to as `scid_alias` in the
 	/// BOLTs) option for outbound private channels. This provides better privacy by not including
 	/// our real on-chain channel UTXO in each invoice and requiring that our counterparty only
@@ -77,6 +102,7 @@ impl Default for ChannelHandshakeConfig {
 			minimum_depth: 6,
 			our_to_self_delay: BREAKDOWN_TIMEOUT,
 			our_htlc_minimum_msat: 1,
+			max_inbound_htlc_value_in_flight_percent_of_channel: 10,
 			negotiate_scid_privacy: false,
 		}
 	}
@@ -95,11 +121,16 @@ impl Default for ChannelHandshakeConfig {
 /// are applied mostly only to incoming channels that's not much of a problem.
 #[derive(Copy, Clone, Debug)]
 pub struct ChannelHandshakeLimits {
-	/// Minimum allowed satoshis when a channel is funded, this is supplied by the sender and so
+	/// Minimum allowed satoshis when a channel is funded. This is supplied by the sender and so
 	/// only applies to inbound channels.
 	///
 	/// Default value: 0.
 	pub min_funding_satoshis: u64,
+	/// Maximum allowed satoshis when a channel is funded. This is supplied by the sender and so
+	/// only applies to inbound channels.
+	///
+	/// Default value: 2^24 - 1.
+	pub max_funding_satoshis: u64,
 	/// The remote node sets a limit on the minimum size of HTLCs we can send to them. This allows
 	/// you to limit the maximum minimum-size they can require.
 	///
@@ -151,6 +182,7 @@ impl Default for ChannelHandshakeLimits {
 	fn default() -> Self {
 		ChannelHandshakeLimits {
 			min_funding_satoshis: 0,
+			max_funding_satoshis: MAX_FUNDING_SATOSHIS_NO_WUMBO,
 			max_htlc_minimum_msat: <u64>::max_value(),
 			min_max_htlc_value_in_flight_msat: 0,
 			max_channel_reserve_satoshis: <u64>::max_value(),