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Serialize blinded path forwards in Trampoline onions.

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Arik Sosman 2024-04-18 14:52:29 -07:00
parent b2bcfca30e
commit 477216e7b1
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1 changed files with 36 additions and 5 deletions
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41
lightning/src/ln/msgs.rs
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@ -1746,9 +1746,9 @@ pub struct FinalOnionHopData {
mod fuzzy_internal_msgs {
use bitcoin::secp256k1::PublicKey;
use crate::blinded_path::payment::{PaymentConstraints, PaymentContext, PaymentRelay};
use crate::blinded_path::payment::{BlindedPaymentPath, PaymentConstraints, PaymentContext, PaymentRelay};
use crate::types::payment::{PaymentPreimage, PaymentSecret};
use crate::types::features::BlindedHopFeatures;
use crate::types::features::{BlindedHopFeatures, Bolt12InvoiceFeatures};
use super::{FinalOnionHopData, TrampolineOnionPacket};
#[allow(unused_imports)]
@ -1836,9 +1836,21 @@ mod fuzzy_internal_msgs {
/// The value, in msat, of the payment after this hop's fee is deducted.
amt_to_forward: u64,
outgoing_cltv_value: u32,
/// The node id to which the trampoline node must find a route
/// The node id to which the trampoline node must find a route.
outgoing_node_id: PublicKey,
}
},
#[allow(unused)]
/// This is the last Trampoline hop, whereupon the Trampoline forward mechanism is exited,
/// and payment data is relayed using non-Trampoline blinded hops
LegacyBlindedPathEntry {
/// The value, in msat, of the payment after this hop's fee is deducted.
amt_to_forward: u64,
outgoing_cltv_value: u32,
/// List of blinded path options the last trampoline hop may choose to route through.
payment_paths: Vec<BlindedPaymentPath>,
/// If applicable, features of the BOLT12 invoice being paid.
invoice_features: Option<Bolt12InvoiceFeatures>,
},
}
pub struct DecodedOnionErrorPacket {
@ -2763,7 +2775,26 @@ impl Writeable for OutboundTrampolinePayload {
(4, HighZeroBytesDroppedBigSize(*outgoing_cltv_value), required),
(14, outgoing_node_id, required)
});
}
},
Self::LegacyBlindedPathEntry { amt_to_forward, outgoing_cltv_value, payment_paths, invoice_features } => {
let mut blinded_path_serialization = [0u8; 2048]; // Fixed-length buffer on the stack
let serialization_length = {
let buffer_size = blinded_path_serialization.len();
let mut blinded_path_slice = &mut blinded_path_serialization[..];
for current_payment_path in payment_paths {
current_payment_path.inner_blinded_path().write(&mut blinded_path_slice)?;
current_payment_path.payinfo.write(&mut blinded_path_slice)?;
}
buffer_size - blinded_path_slice.len()
};
let blinded_path_serialization = &blinded_path_serialization[..serialization_length];
_encode_varint_length_prefixed_tlv!(w, {
(2, HighZeroBytesDroppedBigSize(*amt_to_forward), required),
(4, HighZeroBytesDroppedBigSize(*outgoing_cltv_value), required),
(21, invoice_features.as_ref().map(|m| WithoutLength(m)), option),
(22, WithoutLength(blinded_path_serialization), required)
});
},
}
Ok(())
}