+// This file is Copyright its original authors, visible in version control
+// history.
+//
+// This file is licensed under the Apache License, Version 2.0 <LICENSE-APACHE
+// or http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your option.
+// You may not use this file except in accordance with one or both of these
+// licenses.
+
//! Data structures and methods for constructing [`BlindedPath`]s to send a payment over.
//!
//! [`BlindedPath`]: crate::blinded_path::BlindedPath
use bitcoin::secp256k1::{self, PublicKey, Secp256k1, SecretKey};
-use crate::blinded_path::BlindedHop;
+use crate::blinded_path::{BlindedHop, BlindedPath, IntroductionNode, NodeIdLookUp};
use crate::blinded_path::utils;
+use crate::crypto::streams::ChaChaPolyReadAdapter;
use crate::io;
-use crate::ln::PaymentSecret;
-use crate::ln::channelmanager::CounterpartyForwardingInfo;
+use crate::io::Cursor;
+use crate::ln::types::PaymentSecret;
+use crate::ln::channel_state::CounterpartyForwardingInfo;
use crate::ln::features::BlindedHopFeatures;
use crate::ln::msgs::DecodeError;
+use crate::ln::onion_utils;
use crate::offers::invoice::BlindedPayInfo;
-use crate::util::ser::{HighZeroBytesDroppedBigSize, Readable, Writeable, Writer};
+use crate::offers::invoice_request::InvoiceRequestFields;
+use crate::offers::offer::OfferId;
+use crate::sign::{NodeSigner, Recipient};
+use crate::util::ser::{FixedLengthReader, LengthReadableArgs, HighZeroBytesDroppedBigSize, Readable, Writeable, Writer};
+
+use core::mem;
+use core::ops::Deref;
#[allow(unused_imports)]
use crate::prelude::*;
pub payment_secret: PaymentSecret,
/// Constraints for the receiver of this payment.
pub payment_constraints: PaymentConstraints,
+ /// Context for the receiver of this payment.
+ pub payment_context: PaymentContext,
}
/// Data to construct a [`BlindedHop`] for sending a payment over.
pub htlc_minimum_msat: u64,
}
+/// The context of an inbound payment, which is included in a [`BlindedPath`] via [`ReceiveTlvs`]
+/// and surfaced in [`PaymentPurpose`].
+///
+/// [`BlindedPath`]: crate::blinded_path::BlindedPath
+/// [`PaymentPurpose`]: crate::events::PaymentPurpose
+#[derive(Clone, Debug, Eq, PartialEq)]
+pub enum PaymentContext {
+ /// The payment context was unknown.
+ Unknown(UnknownPaymentContext),
+
+ /// The payment was made for an invoice requested from a BOLT 12 [`Offer`].
+ ///
+ /// [`Offer`]: crate::offers::offer::Offer
+ Bolt12Offer(Bolt12OfferContext),
+
+ /// The payment was made for an invoice sent for a BOLT 12 [`Refund`].
+ ///
+ /// [`Refund`]: crate::offers::refund::Refund
+ Bolt12Refund(Bolt12RefundContext),
+}
+
+// Used when writing PaymentContext in Event::PaymentClaimable to avoid cloning.
+pub(crate) enum PaymentContextRef<'a> {
+ Bolt12Offer(&'a Bolt12OfferContext),
+ Bolt12Refund(&'a Bolt12RefundContext),
+}
+
+/// An unknown payment context.
+#[derive(Clone, Debug, Eq, PartialEq)]
+pub struct UnknownPaymentContext(());
+
+/// The context of a payment made for an invoice requested from a BOLT 12 [`Offer`].
+///
+/// [`Offer`]: crate::offers::offer::Offer
+#[derive(Clone, Debug, Eq, PartialEq)]
+pub struct Bolt12OfferContext {
+ /// The identifier of the [`Offer`].
+ ///
+ /// [`Offer`]: crate::offers::offer::Offer
+ pub offer_id: OfferId,
+
+ /// Fields from an [`InvoiceRequest`] sent for a [`Bolt12Invoice`].
+ ///
+ /// [`InvoiceRequest`]: crate::offers::invoice_request::InvoiceRequest
+ /// [`Bolt12Invoice`]: crate::offers::invoice::Bolt12Invoice
+ pub invoice_request: InvoiceRequestFields,
+}
+
+/// The context of a payment made for an invoice sent for a BOLT 12 [`Refund`].
+///
+/// [`Refund`]: crate::offers::refund::Refund
+#[derive(Clone, Debug, Eq, PartialEq)]
+pub struct Bolt12RefundContext {}
+
+impl PaymentContext {
+ pub(crate) fn unknown() -> Self {
+ PaymentContext::Unknown(UnknownPaymentContext(()))
+ }
+}
+
impl TryFrom<CounterpartyForwardingInfo> for PaymentRelay {
type Error = ();
fn write<W: Writer>(&self, w: &mut W) -> Result<(), io::Error> {
encode_tlv_stream!(w, {
(12, self.payment_constraints, required),
- (65536, self.payment_secret, required)
+ (65536, self.payment_secret, required),
+ (65537, self.payment_context, required)
});
Ok(())
}
(12, payment_constraints, required),
(14, features, option),
(65536, payment_secret, option),
+ (65537, payment_context, (default_value, PaymentContext::unknown())),
});
let _padding: Option<utils::Padding> = _padding;
if let Some(short_channel_id) = scid {
- if payment_secret.is_some() { return Err(DecodeError::InvalidValue) }
+ if payment_secret.is_some() {
+ return Err(DecodeError::InvalidValue)
+ }
Ok(BlindedPaymentTlvs::Forward(ForwardTlvs {
short_channel_id,
payment_relay: payment_relay.ok_or(DecodeError::InvalidValue)?,
Ok(BlindedPaymentTlvs::Receive(ReceiveTlvs {
payment_secret: payment_secret.ok_or(DecodeError::InvalidValue)?,
payment_constraints: payment_constraints.0.unwrap(),
+ payment_context: payment_context.0.unwrap(),
}))
}
}
utils::construct_blinded_hops(secp_ctx, pks, tlvs, session_priv)
}
+// Advance the blinded onion payment path by one hop, so make the second hop into the new
+// introduction node.
+//
+// Will only modify `path` when returning `Ok`.
+pub(crate) fn advance_path_by_one<NS: Deref, NL: Deref, T>(
+ path: &mut BlindedPath, node_signer: &NS, node_id_lookup: &NL, secp_ctx: &Secp256k1<T>
+) -> Result<(), ()>
+where
+ NS::Target: NodeSigner,
+ NL::Target: NodeIdLookUp,
+ T: secp256k1::Signing + secp256k1::Verification,
+{
+ let control_tlvs_ss = node_signer.ecdh(Recipient::Node, &path.blinding_point, None)?;
+ let rho = onion_utils::gen_rho_from_shared_secret(&control_tlvs_ss.secret_bytes());
+ let encrypted_control_tlvs = &path.blinded_hops.get(0).ok_or(())?.encrypted_payload;
+ let mut s = Cursor::new(encrypted_control_tlvs);
+ let mut reader = FixedLengthReader::new(&mut s, encrypted_control_tlvs.len() as u64);
+ match ChaChaPolyReadAdapter::read(&mut reader, rho) {
+ Ok(ChaChaPolyReadAdapter {
+ readable: BlindedPaymentTlvs::Forward(ForwardTlvs { short_channel_id, .. })
+ }) => {
+ let next_node_id = match node_id_lookup.next_node_id(short_channel_id) {
+ Some(node_id) => node_id,
+ None => return Err(()),
+ };
+ let mut new_blinding_point = onion_utils::next_hop_pubkey(
+ secp_ctx, path.blinding_point, control_tlvs_ss.as_ref()
+ ).map_err(|_| ())?;
+ mem::swap(&mut path.blinding_point, &mut new_blinding_point);
+ path.introduction_node = IntroductionNode::NodeId(next_node_id);
+ path.blinded_hops.remove(0);
+ Ok(())
+ },
+ _ => Err(())
+ }
+}
+
/// `None` if underflow occurs.
pub(crate) fn amt_to_forward_msat(inbound_amt_msat: u64, payment_relay: &PaymentRelay) -> Option<u64> {
let inbound_amt = inbound_amt_msat as u128;
}
}
+impl_writeable_tlv_based_enum!(PaymentContext,
+ ;
+ (0, Unknown),
+ (1, Bolt12Offer),
+ (2, Bolt12Refund),
+);
+
+impl<'a> Writeable for PaymentContextRef<'a> {
+ fn write<W: Writer>(&self, w: &mut W) -> Result<(), io::Error> {
+ match self {
+ PaymentContextRef::Bolt12Offer(context) => {
+ 1u8.write(w)?;
+ context.write(w)?;
+ },
+ PaymentContextRef::Bolt12Refund(context) => {
+ 2u8.write(w)?;
+ context.write(w)?;
+ },
+ }
+
+ Ok(())
+ }
+}
+
+impl Writeable for UnknownPaymentContext {
+ fn write<W: Writer>(&self, _w: &mut W) -> Result<(), io::Error> {
+ Ok(())
+ }
+}
+
+impl Readable for UnknownPaymentContext {
+ fn read<R: io::Read>(_r: &mut R) -> Result<Self, DecodeError> {
+ Ok(UnknownPaymentContext(()))
+ }
+}
+
+impl_writeable_tlv_based!(Bolt12OfferContext, {
+ (0, offer_id, required),
+ (2, invoice_request, required),
+});
+
+impl_writeable_tlv_based!(Bolt12RefundContext, {});
+
#[cfg(test)]
mod tests {
use bitcoin::secp256k1::PublicKey;
- use crate::blinded_path::payment::{ForwardNode, ForwardTlvs, ReceiveTlvs, PaymentConstraints, PaymentRelay};
- use crate::ln::PaymentSecret;
+ use crate::blinded_path::payment::{ForwardNode, ForwardTlvs, ReceiveTlvs, PaymentConstraints, PaymentContext, PaymentRelay};
+ use crate::ln::types::PaymentSecret;
use crate::ln::features::BlindedHopFeatures;
use crate::ln::functional_test_utils::TEST_FINAL_CLTV;
max_cltv_expiry: 0,
htlc_minimum_msat: 1,
},
+ payment_context: PaymentContext::unknown(),
};
let htlc_maximum_msat = 100_000;
let blinded_payinfo = super::compute_payinfo(&intermediate_nodes[..], &recv_tlvs, htlc_maximum_msat, 12).unwrap();
max_cltv_expiry: 0,
htlc_minimum_msat: 1,
},
+ payment_context: PaymentContext::unknown(),
};
let blinded_payinfo = super::compute_payinfo(&[], &recv_tlvs, 4242, TEST_FINAL_CLTV as u16).unwrap();
assert_eq!(blinded_payinfo.fee_base_msat, 0);
max_cltv_expiry: 0,
htlc_minimum_msat: 3,
},
+ payment_context: PaymentContext::unknown(),
};
let htlc_maximum_msat = 100_000;
let blinded_payinfo = super::compute_payinfo(&intermediate_nodes[..], &recv_tlvs, htlc_maximum_msat, TEST_FINAL_CLTV as u16).unwrap();
max_cltv_expiry: 0,
htlc_minimum_msat: 1,
},
+ payment_context: PaymentContext::unknown(),
};
let htlc_minimum_msat = 3798;
assert!(super::compute_payinfo(&intermediate_nodes[..], &recv_tlvs, htlc_minimum_msat - 1, TEST_FINAL_CLTV as u16).is_err());
max_cltv_expiry: 0,
htlc_minimum_msat: 1,
},
+ payment_context: PaymentContext::unknown(),
};
let blinded_payinfo = super::compute_payinfo(&intermediate_nodes[..], &recv_tlvs, 10_000, TEST_FINAL_CLTV as u16).unwrap();
projects / rust-lightning / blobdiff