Persist previously failed blinded paths in RouteParameters.

Useful so we don't retry over these paths.

diff --git a/lightning/src/routing/router.rs b/lightning/src/routing/router.rs
index f79da5ee9ec2d5b4340837cd486b1f59678c74b7..44933d6746748b05f8f668a314e2e7bbed218acd 100644 (file)
--- a/lightning/src/routing/router.rs
+++ b/lightning/src/routing/router.rs
@@ -711,6 +711,11 @@ pub struct PaymentParameters {
        /// payment to fail. Future attempts for the same payment shouldn't be relayed through any of
        /// these SCIDs.
        pub previously_failed_channels: Vec<u64>,
+
+       /// A list of indices corresponding to blinded paths in [`Payee::Blinded::route_hints`] which this
+       /// payment was previously attempted over and which caused the payment to fail. Future attempts
+       /// for the same payment shouldn't be relayed through any of these blinded paths.
+       pub previously_failed_blinded_path_idxs: Vec<u64>,
 }
 
 impl Writeable for PaymentParameters {
@@ -732,6 +737,7 @@ impl Writeable for PaymentParameters {
                        (7, self.previously_failed_channels, required_vec),
                        (8, *blinded_hints, optional_vec),
                        (9, self.payee.final_cltv_expiry_delta(), option),
+                       (11, self.previously_failed_blinded_path_idxs, required_vec),
                });
                Ok(())
        }
@@ -750,6 +756,7 @@ impl ReadableArgs<u32> for PaymentParameters {
                        (7, previously_failed_channels, optional_vec),
                        (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),
                });
                let blinded_route_hints = blinded_route_hints.unwrap_or(vec![]);
                let payee = if blinded_route_hints.len() != 0 {
@@ -773,6 +780,7 @@ impl ReadableArgs<u32> for PaymentParameters {
                        max_channel_saturation_power_of_half: _init_tlv_based_struct_field!(max_channel_saturation_power_of_half, (default_value, unused)),
                        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()),
                })
        }
 }
@@ -791,6 +799,7 @@ impl PaymentParameters {
                        max_path_count: DEFAULT_MAX_PATH_COUNT,
                        max_channel_saturation_power_of_half: DEFAULT_MAX_CHANNEL_SATURATION_POW_HALF,
                        previously_failed_channels: Vec::new(),
+                       previously_failed_blinded_path_idxs: Vec::new(),
                }
        }
 
@@ -829,6 +838,7 @@ impl PaymentParameters {
                        max_path_count: DEFAULT_MAX_PATH_COUNT,
                        max_channel_saturation_power_of_half: DEFAULT_MAX_CHANNEL_SATURATION_POW_HALF,
                        previously_failed_channels: Vec::new(),
+                       previously_failed_blinded_path_idxs: Vec::new(),
                }
        }