From 7f7f375240794dbabab8663eef84e6fecfa69c37 Mon Sep 17 00:00:00 2001 From: Valentine Wallace Date: Fri, 10 Nov 2023 17:03:15 -0500 Subject: [PATCH] Add max path length knob to PaymentParameters. Will be used so the outbound_payment module can calculate the maximum path length with knowledge of any custom TLVs or payment metadata present. --- lightning/src/routing/router.rs | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/lightning/src/routing/router.rs b/lightning/src/routing/router.rs index 420f6d5d..4a4063f5 100644 --- a/lightning/src/routing/router.rs +++ b/lightning/src/routing/router.rs @@ -686,6 +686,10 @@ pub struct PaymentParameters { /// Defaults to [`DEFAULT_MAX_PATH_COUNT`]. pub max_path_count: u8, + /// The maximum number of [`Path::hops`] in any returned path. + /// Defaults to [`MAX_PATH_LENGTH_ESTIMATE`]. + pub max_path_length: u8, + /// Selects the maximum share of a channel's total capacity which will be sent over a channel, /// as a power of 1/2. A higher value prefers to send the payment using more MPP parts whereas /// a lower value prefers to send larger MPP parts, potentially saturating channels and @@ -732,6 +736,7 @@ impl Writeable for PaymentParameters { (8, *blinded_hints, optional_vec), (9, self.payee.final_cltv_expiry_delta(), option), (11, self.previously_failed_blinded_path_idxs, required_vec), + (13, self.max_path_length, required), }); Ok(()) } @@ -751,6 +756,7 @@ impl ReadableArgs for PaymentParameters { (8, blinded_route_hints, optional_vec), (9, final_cltv_expiry_delta, (default_value, default_final_cltv_expiry_delta)), (11, previously_failed_blinded_path_idxs, optional_vec), + (13, max_path_length, (default_value, MAX_PATH_LENGTH_ESTIMATE)), }); let blinded_route_hints = blinded_route_hints.unwrap_or(vec![]); let payee = if blinded_route_hints.len() != 0 { @@ -775,6 +781,7 @@ impl ReadableArgs for PaymentParameters { expiry_time, previously_failed_channels: previously_failed_channels.unwrap_or(Vec::new()), previously_failed_blinded_path_idxs: previously_failed_blinded_path_idxs.unwrap_or(Vec::new()), + max_path_length: _init_tlv_based_struct_field!(max_path_length, (default_value, unused)), }) } } @@ -791,6 +798,7 @@ impl PaymentParameters { expiry_time: None, max_total_cltv_expiry_delta: DEFAULT_MAX_TOTAL_CLTV_EXPIRY_DELTA, max_path_count: DEFAULT_MAX_PATH_COUNT, + max_path_length: MAX_PATH_LENGTH_ESTIMATE, max_channel_saturation_power_of_half: DEFAULT_MAX_CHANNEL_SATURATION_POW_HALF, previously_failed_channels: Vec::new(), previously_failed_blinded_path_idxs: Vec::new(), @@ -830,6 +838,7 @@ impl PaymentParameters { expiry_time: None, max_total_cltv_expiry_delta: DEFAULT_MAX_TOTAL_CLTV_EXPIRY_DELTA, max_path_count: DEFAULT_MAX_PATH_COUNT, + max_path_length: MAX_PATH_LENGTH_ESTIMATE, max_channel_saturation_power_of_half: DEFAULT_MAX_CHANNEL_SATURATION_POW_HALF, previously_failed_channels: Vec::new(), previously_failed_blinded_path_idxs: Vec::new(), -- 2.30.2