From: Valentine Wallace Date: Fri, 24 Mar 2023 18:35:52 +0000 (-0400) Subject: Replace OnionHopData with OutboundPayload for outbound onions X-Git-Tag: v0.0.117-alpha1~67^2~1 X-Git-Url: http://git.bitcoin.ninja/?a=commitdiff_plain;h=67868aec721b38c993ce0e48ecc46549092963f6;p=rust-lightning Replace OnionHopData with OutboundPayload for outbound onions Follows on from the previous commit, see its message --- diff --git a/lightning/src/ln/functional_tests.rs b/lightning/src/ln/functional_tests.rs index 271ff541a..474735f25 100644 --- a/lightning/src/ln/functional_tests.rs +++ b/lightning/src/ln/functional_tests.rs @@ -8039,7 +8039,9 @@ fn test_onion_value_mpp_set_calculation() { RecipientOnionFields::secret_only(our_payment_secret), height + 1, &None).unwrap(); // Edit amt_to_forward to simulate the sender having set // the final amount and the routing node taking less fee - onion_payloads[1].amt_to_forward = 99_000; + if let msgs::OutboundOnionPayload::Receive { ref mut amt_msat, .. } = onion_payloads[1] { + *amt_msat = 99_000; + } else { panic!() } let new_onion_packet = onion_utils::construct_onion_packet(onion_payloads, onion_keys, [0; 32], &our_payment_hash).unwrap(); payment_event.msgs[0].onion_routing_packet = new_onion_packet; } diff --git a/lightning/src/ln/msgs.rs b/lightning/src/ln/msgs.rs index 590b26632..0635dafd7 100644 --- a/lightning/src/ln/msgs.rs +++ b/lightning/src/ln/msgs.rs @@ -1442,24 +1442,22 @@ mod fuzzy_internal_msgs { }, } - pub(crate) enum OnionHopDataFormat { - NonFinalNode { + pub(crate) enum OutboundOnionPayload { + Forward { short_channel_id: u64, + /// The value, in msat, of the payment after this hop's fee is deducted. + amt_to_forward: u64, + outgoing_cltv_value: u32, }, - FinalNode { + Receive { payment_data: Option, payment_metadata: Option>, keysend_preimage: Option, + amt_msat: u64, + outgoing_cltv_value: u32, }, } - pub struct OnionHopData { - pub(crate) format: OnionHopDataFormat, - /// The value, in msat, of the payment after this hop's fee is deducted. - pub(crate) amt_to_forward: u64, - pub(crate) outgoing_cltv_value: u32, - } - pub struct DecodedOnionErrorPacket { pub(crate) hmac: [u8; 32], pub(crate) failuremsg: Vec, @@ -1966,20 +1964,22 @@ impl Readable for FinalOnionHopData { } } -impl Writeable for OnionHopData { +impl Writeable for OutboundOnionPayload { fn write(&self, w: &mut W) -> Result<(), io::Error> { - match self.format { - OnionHopDataFormat::NonFinalNode { short_channel_id } => { + match self { + Self::Forward { short_channel_id, amt_to_forward, outgoing_cltv_value } => { _encode_varint_length_prefixed_tlv!(w, { - (2, HighZeroBytesDroppedBigSize(self.amt_to_forward), required), - (4, HighZeroBytesDroppedBigSize(self.outgoing_cltv_value), required), + (2, HighZeroBytesDroppedBigSize(*amt_to_forward), required), + (4, HighZeroBytesDroppedBigSize(*outgoing_cltv_value), required), (6, short_channel_id, required) }); }, - OnionHopDataFormat::FinalNode { ref payment_data, ref payment_metadata, ref keysend_preimage } => { + Self::Receive { + ref payment_data, ref payment_metadata, ref keysend_preimage, amt_msat, outgoing_cltv_value + } => { _encode_varint_length_prefixed_tlv!(w, { - (2, HighZeroBytesDroppedBigSize(self.amt_to_forward), required), - (4, HighZeroBytesDroppedBigSize(self.outgoing_cltv_value), required), + (2, HighZeroBytesDroppedBigSize(*amt_msat), required), + (4, HighZeroBytesDroppedBigSize(*outgoing_cltv_value), required), (8, payment_data, option), (16, payment_metadata.as_ref().map(|m| WithoutLength(m)), option), (5482373484, keysend_preimage, option) @@ -2454,7 +2454,7 @@ mod tests { use hex; use crate::ln::{PaymentPreimage, PaymentHash, PaymentSecret}; use crate::ln::features::{ChannelFeatures, ChannelTypeFeatures, InitFeatures, NodeFeatures}; - use crate::ln::msgs::{self, FinalOnionHopData, OnionErrorPacket, OnionHopDataFormat}; + use crate::ln::msgs::{self, FinalOnionHopData, OnionErrorPacket}; use crate::routing::gossip::{NodeAlias, NodeId}; use crate::util::ser::{Writeable, Readable, Hostname, TransactionU16LenLimited}; @@ -3537,14 +3537,12 @@ mod tests { #[test] fn encoding_nonfinal_onion_hop_data() { - let msg = msgs::OnionHopData { - format: OnionHopDataFormat::NonFinalNode { - short_channel_id: 0xdeadbeef1bad1dea, - }, + let outbound_msg = msgs::OutboundOnionPayload::Forward { + short_channel_id: 0xdeadbeef1bad1dea, amt_to_forward: 0x0badf00d01020304, outgoing_cltv_value: 0xffffffff, }; - let encoded_value = msg.encode(); + let encoded_value = outbound_msg.encode(); let target_value = hex::decode("1a02080badf00d010203040404ffffffff0608deadbeef1bad1dea").unwrap(); assert_eq!(encoded_value, target_value); @@ -3558,16 +3556,14 @@ mod tests { #[test] fn encoding_final_onion_hop_data() { - let msg = msgs::OnionHopData { - format: OnionHopDataFormat::FinalNode { - payment_data: None, - payment_metadata: None, - keysend_preimage: None, - }, - amt_to_forward: 0x0badf00d01020304, + let outbound_msg = msgs::OutboundOnionPayload::Receive { + payment_data: None, + payment_metadata: None, + keysend_preimage: None, + amt_msat: 0x0badf00d01020304, outgoing_cltv_value: 0xffffffff, }; - let encoded_value = msg.encode(); + let encoded_value = outbound_msg.encode(); let target_value = hex::decode("1002080badf00d010203040404ffffffff").unwrap(); assert_eq!(encoded_value, target_value); @@ -3581,19 +3577,17 @@ mod tests { #[test] fn encoding_final_onion_hop_data_with_secret() { let expected_payment_secret = PaymentSecret([0x42u8; 32]); - let msg = msgs::OnionHopData { - format: OnionHopDataFormat::FinalNode { - payment_data: Some(FinalOnionHopData { - payment_secret: expected_payment_secret, - total_msat: 0x1badca1f - }), - payment_metadata: None, - keysend_preimage: None, - }, - amt_to_forward: 0x0badf00d01020304, + let outbound_msg = msgs::OutboundOnionPayload::Receive { + payment_data: Some(FinalOnionHopData { + payment_secret: expected_payment_secret, + total_msat: 0x1badca1f + }), + payment_metadata: None, + keysend_preimage: None, + amt_msat: 0x0badf00d01020304, outgoing_cltv_value: 0xffffffff, }; - let encoded_value = msg.encode(); + let encoded_value = outbound_msg.encode(); let target_value = hex::decode("3602080badf00d010203040404ffffffff082442424242424242424242424242424242424242424242424242424242424242421badca1f").unwrap(); assert_eq!(encoded_value, target_value); @@ -3765,20 +3759,18 @@ mod tests { // see above test, needs to be a separate method for use of the serialization macros. fn encode_big_payload() -> Result, io::Error> { use crate::util::ser::HighZeroBytesDroppedBigSize; - let payload = msgs::OnionHopData { - format: OnionHopDataFormat::NonFinalNode { - short_channel_id: 0xdeadbeef1bad1dea, - }, + let payload = msgs::OutboundOnionPayload::Forward { + short_channel_id: 0xdeadbeef1bad1dea, amt_to_forward: 1000, outgoing_cltv_value: 0xffffffff, }; let mut encoded_payload = Vec::new(); let test_bytes = vec![42u8; 1000]; - if let OnionHopDataFormat::NonFinalNode { short_channel_id } = payload.format { + if let msgs::OutboundOnionPayload::Forward { short_channel_id, amt_to_forward, outgoing_cltv_value } = payload { _encode_varint_length_prefixed_tlv!(&mut encoded_payload, { (1, test_bytes, required_vec), - (2, HighZeroBytesDroppedBigSize(payload.amt_to_forward), required), - (4, HighZeroBytesDroppedBigSize(payload.outgoing_cltv_value), required), + (2, HighZeroBytesDroppedBigSize(amt_to_forward), required), + (4, HighZeroBytesDroppedBigSize(outgoing_cltv_value), required), (6, short_channel_id, required) }); } diff --git a/lightning/src/ln/onion_route_tests.rs b/lightning/src/ln/onion_route_tests.rs index e5faedfe7..9945b8c49 100644 --- a/lightning/src/ln/onion_route_tests.rs +++ b/lightning/src/ln/onion_route_tests.rs @@ -252,7 +252,7 @@ struct BogusOnionHopData { data: Vec } impl BogusOnionHopData { - fn new(orig: msgs::OnionHopData) -> Self { + fn new(orig: msgs::OutboundOnionPayload) -> Self { Self { data: orig.encode() } } } @@ -875,15 +875,15 @@ fn test_always_create_tlv_format_onion_payloads() { let (onion_payloads, _htlc_msat, _htlc_cltv) = onion_utils::build_onion_payloads( &route.paths[0], 40000, RecipientOnionFields::spontaneous_empty(), cur_height, &None).unwrap(); - match onion_payloads[0].format { - msgs::OnionHopDataFormat::NonFinalNode {..} => {}, + match onion_payloads[0] { + msgs::OutboundOnionPayload::Forward {..} => {}, _ => { panic!( "Should have generated a `msgs::OnionHopDataFormat::NonFinalNode` payload for `hops[0]`, despite that the features signals no support for variable length onions" )} } - match onion_payloads[1].format { - msgs::OnionHopDataFormat::FinalNode {..} => {}, + match onion_payloads[1] { + msgs::OutboundOnionPayload::Receive {..} => {}, _ => {panic!( "Should have generated a `msgs::OnionHopDataFormat::FinalNode` payload for `hops[1]`, despite that the features signals no support for variable length onions" diff --git a/lightning/src/ln/onion_utils.rs b/lightning/src/ln/onion_utils.rs index a915cf29d..f3579a56b 100644 --- a/lightning/src/ln/onion_utils.rs +++ b/lightning/src/ln/onion_utils.rs @@ -149,11 +149,11 @@ pub(super) fn construct_onion_keys(secp_ctx: &Secp256k1) -> Result<(Vec, u64, u32), APIError> { +pub(super) fn build_onion_payloads(path: &Path, total_msat: u64, mut recipient_onion: RecipientOnionFields, starting_htlc_offset: u32, keysend_preimage: &Option) -> Result<(Vec, u64, u32), APIError> { let mut cur_value_msat = 0u64; let mut cur_cltv = starting_htlc_offset; let mut last_short_channel_id = 0; - let mut res: Vec = Vec::with_capacity(path.hops.len()); + let mut res: Vec = Vec::with_capacity(path.hops.len()); for (idx, hop) in path.hops.iter().rev().enumerate() { // First hop gets special values so that it can check, on receipt, that everything is @@ -161,25 +161,25 @@ pub(super) fn build_onion_payloads(path: &Path, total_msat: u64, mut recipient_o // the intended recipient). let value_msat = if cur_value_msat == 0 { hop.fee_msat } else { cur_value_msat }; let cltv = if cur_cltv == starting_htlc_offset { hop.cltv_expiry_delta + starting_htlc_offset } else { cur_cltv }; - res.insert(0, msgs::OnionHopData { - format: if idx == 0 { - msgs::OnionHopDataFormat::FinalNode { - payment_data: if let Some(secret) = recipient_onion.payment_secret.take() { - Some(msgs::FinalOnionHopData { - payment_secret: secret, - total_msat, - }) - } else { None }, - payment_metadata: recipient_onion.payment_metadata.take(), - keysend_preimage: *keysend_preimage, - } - } else { - msgs::OnionHopDataFormat::NonFinalNode { - short_channel_id: last_short_channel_id, - } - }, - amt_to_forward: value_msat, - outgoing_cltv_value: cltv, + res.insert(0, if idx == 0 { + msgs::OutboundOnionPayload::Receive { + payment_data: if let Some(secret) = recipient_onion.payment_secret.take() { + Some(msgs::FinalOnionHopData { + payment_secret: secret, + total_msat, + }) + } else { None }, + payment_metadata: recipient_onion.payment_metadata.take(), + keysend_preimage: *keysend_preimage, + amt_msat: value_msat, + outgoing_cltv_value: cltv, + } + } else { + msgs::OutboundOnionPayload::Forward { + short_channel_id: last_short_channel_id, + amt_to_forward: value_msat, + outgoing_cltv_value: cltv, + } }); cur_value_msat += hop.fee_msat; if cur_value_msat >= 21000000 * 100000000 * 1000 { @@ -208,7 +208,10 @@ fn shift_slice_right(arr: &mut [u8], amt: usize) { } } -pub(super) fn construct_onion_packet(payloads: Vec, onion_keys: Vec, prng_seed: [u8; 32], associated_data: &PaymentHash) -> Result { +pub(super) fn construct_onion_packet( + payloads: Vec, onion_keys: Vec, prng_seed: [u8; 32], + associated_data: &PaymentHash +) -> Result { let mut packet_data = [0; ONION_DATA_LEN]; let mut chacha = ChaCha20::new(&prng_seed, &[0; 8]); @@ -988,10 +991,8 @@ mod tests { // with raw hex instead of our in-memory enums, as the payloads contains custom types, and // we have no way of representing that with our enums. let payloads = vec!( - RawOnionHopData::new(msgs::OnionHopData { - format: msgs::OnionHopDataFormat::NonFinalNode { - short_channel_id: 1, - }, + RawOnionHopData::new(msgs::OutboundOnionPayload::Forward { + short_channel_id: 1, amt_to_forward: 15000, outgoing_cltv_value: 1500, }), @@ -1013,17 +1014,13 @@ mod tests { RawOnionHopData { data: hex::decode("52020236b00402057806080000000000000002fd02013c0102030405060708090a0b0c0d0e0f0102030405060708090a0b0c0d0e0f0102030405060708090a0b0c0d0e0f0102030405060708090a0b0c0d0e0f").unwrap(), }, - RawOnionHopData::new(msgs::OnionHopData { - format: msgs::OnionHopDataFormat::NonFinalNode { - short_channel_id: 3, - }, + RawOnionHopData::new(msgs::OutboundOnionPayload::Forward { + short_channel_id: 3, amt_to_forward: 12500, outgoing_cltv_value: 1250, }), - RawOnionHopData::new(msgs::OnionHopData { - format: msgs::OnionHopDataFormat::NonFinalNode { - short_channel_id: 4, - }, + RawOnionHopData::new(msgs::OutboundOnionPayload::Forward { + short_channel_id: 4, amt_to_forward: 10000, outgoing_cltv_value: 1000, }), @@ -1101,7 +1098,7 @@ mod tests { data: Vec } impl RawOnionHopData { - fn new(orig: msgs::OnionHopData) -> Self { + fn new(orig: msgs::OutboundOnionPayload) -> Self { Self { data: orig.encode() } } }