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Parse experimental invoice TLV records
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The BOLT12 spec defines an experimental TLV range that is allowed in
offer and invoice_request messages. The remaining TLV-space is for
experimental use in invoice messages. Allow this range when parsing an
invoice and include it when signing one.
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@jkczyz
jkczyz committed Sep 16, 2024
1 parent ad638a5 commit 575433d
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Showing 4 changed files with 129 additions and 44 deletions.
85 changes: 57 additions & 28 deletions lightning/src/offers/invoice.rs
View file
Original file line number Diff line number Diff line change
Expand Up @@ -505,7 +505,9 @@ impl UnsignedBolt12Invoice {
record.write(&mut bytes).unwrap();
}

let (_, _, _, invoice_tlv_stream, _, _) = contents.as_tlv_stream();
let (_, _, _, invoice_tlv_stream, _, _, experimental_invoice_tlv_stream) =
contents.as_tlv_stream();

invoice_tlv_stream.write(&mut bytes).unwrap();

let mut experimental_bytes = Vec::new();
Expand All @@ -514,6 +516,8 @@ impl UnsignedBolt12Invoice {
record.write(&mut experimental_bytes).unwrap();
}

experimental_invoice_tlv_stream.write(&mut experimental_bytes).unwrap();

let tlv_stream = TlvStream::new(&bytes).chain(TlvStream::new(&experimental_bytes));
let tagged_hash = TaggedHash::from_tlv_stream(SIGNATURE_TAG, tlv_stream);

Expand Down Expand Up @@ -871,14 +875,15 @@ impl Bolt12Invoice {
let (
payer_tlv_stream, offer_tlv_stream, invoice_request_tlv_stream, invoice_tlv_stream,
experimental_offer_tlv_stream, experimental_invoice_request_tlv_stream,
experimental_invoice_tlv_stream,
) = self.contents.as_tlv_stream();
let signature_tlv_stream = SignatureTlvStreamRef {
signature: Some(&self.signature),
};
(
payer_tlv_stream, offer_tlv_stream, invoice_request_tlv_stream, invoice_tlv_stream,
signature_tlv_stream, experimental_offer_tlv_stream,
experimental_invoice_request_tlv_stream,
experimental_invoice_request_tlv_stream, experimental_invoice_tlv_stream,
)
}

Expand Down Expand Up @@ -1139,9 +1144,12 @@ impl InvoiceContents {
InvoiceContents::ForOffer { invoice_request, .. } => invoice_request.as_tlv_stream(),
InvoiceContents::ForRefund { refund, .. } => refund.as_tlv_stream(),
};
let invoice = self.fields().as_tlv_stream();
let (invoice, experimental_invoice) = self.fields().as_tlv_stream();

(payer, offer, invoice_request, invoice, experimental_offer, experimental_invoice_request)
(
payer, offer, invoice_request, invoice, experimental_offer,
experimental_invoice_request, experimental_invoice,
)
}
}

Expand Down Expand Up @@ -1189,24 +1197,27 @@ pub(super) fn filter_fallbacks(
}

impl InvoiceFields {
fn as_tlv_stream(&self) -> InvoiceTlvStreamRef {
fn as_tlv_stream(&self) -> (InvoiceTlvStreamRef, ExperimentalInvoiceTlvStreamRef) {
let features = {
if self.features == Bolt12InvoiceFeatures::empty() { None }
else { Some(&self.features) }
};

InvoiceTlvStreamRef {
paths: Some(Iterable(self.payment_paths.iter().map(|path| path.inner_blinded_path()))),
blindedpay: Some(Iterable(self.payment_paths.iter().map(|path| &path.payinfo))),
created_at: Some(self.created_at.as_secs()),
relative_expiry: self.relative_expiry.map(|duration| duration.as_secs() as u32),
payment_hash: Some(&self.payment_hash),
amount: Some(self.amount_msats),
fallbacks: self.fallbacks.as_ref(),
features,
node_id: Some(&self.signing_pubkey),
message_paths: None,
}
(
InvoiceTlvStreamRef {
paths: Some(Iterable(self.payment_paths.iter().map(|path| path.inner_blinded_path()))),
blindedpay: Some(Iterable(self.payment_paths.iter().map(|path| &path.payinfo))),
created_at: Some(self.created_at.as_secs()),
relative_expiry: self.relative_expiry.map(|duration| duration.as_secs() as u32),
payment_hash: Some(&self.payment_hash),
amount: Some(self.amount_msats),
fallbacks: self.fallbacks.as_ref(),
features,
node_id: Some(&self.signing_pubkey),
message_paths: None,
},
ExperimentalInvoiceTlvStreamRef {},
)
}
}

Expand Down Expand Up @@ -1244,11 +1255,13 @@ impl TryFrom<Vec<u8>> for UnsignedBolt12Invoice {
let (
payer_tlv_stream, offer_tlv_stream, invoice_request_tlv_stream, invoice_tlv_stream,
experimental_offer_tlv_stream, experimental_invoice_request_tlv_stream,
experimental_invoice_tlv_stream,
) = tlv_stream;
let contents = InvoiceContents::try_from(
(
payer_tlv_stream, offer_tlv_stream, invoice_request_tlv_stream, invoice_tlv_stream,
experimental_offer_tlv_stream, experimental_invoice_request_tlv_stream,
experimental_invoice_tlv_stream,
)
)?;

Expand Down Expand Up @@ -1291,6 +1304,13 @@ tlv_stream!(InvoiceTlvStream, InvoiceTlvStreamRef<'a>, INVOICE_TYPES, {
(236, message_paths: (Vec<BlindedMessagePath>, WithoutLength)),
});

/// Valid type range for experimental invoice TLV records.
const EXPERIMENTAL_INVOICE_TYPES: core::ops::RangeFrom<u64> = 3_000_000_000..;

tlv_stream!(
ExperimentalInvoiceTlvStream, ExperimentalInvoiceTlvStreamRef, EXPERIMENTAL_INVOICE_TYPES, {}
);

pub(super) type BlindedPathIter<'a> = core::iter::Map<
core::slice::Iter<'a, BlindedPaymentPath>,
for<'r> fn(&'r BlindedPaymentPath) -> &'r BlindedPath,
Expand All @@ -1312,7 +1332,7 @@ impl_writeable!(FallbackAddress, { version, program });

type FullInvoiceTlvStream =(
PayerTlvStream, OfferTlvStream, InvoiceRequestTlvStream, InvoiceTlvStream, SignatureTlvStream,
ExperimentalOfferTlvStream, ExperimentalInvoiceRequestTlvStream,
ExperimentalOfferTlvStream, ExperimentalInvoiceRequestTlvStream, ExperimentalInvoiceTlvStream,
);

type FullInvoiceTlvStreamRef<'a> = (
Expand All @@ -1323,6 +1343,7 @@ type FullInvoiceTlvStreamRef<'a> = (
SignatureTlvStreamRef<'a>,
ExperimentalOfferTlvStreamRef,
ExperimentalInvoiceRequestTlvStreamRef,
ExperimentalInvoiceTlvStreamRef,
);

impl CursorReadable for FullInvoiceTlvStream {
Expand All @@ -1334,19 +1355,20 @@ impl CursorReadable for FullInvoiceTlvStream {
let signature = CursorReadable::read(r)?;
let experimental_offer = CursorReadable::read(r)?;
let experimental_invoice_request = CursorReadable::read(r)?;
let experimental_invoice = CursorReadable::read(r)?;

Ok(
(
payer, offer, invoice_request, invoice, signature, experimental_offer,
experimental_invoice_request,
experimental_invoice_request, experimental_invoice,
)
)
}
}

type PartialInvoiceTlvStream = (
PayerTlvStream, OfferTlvStream, InvoiceRequestTlvStream, InvoiceTlvStream,
ExperimentalOfferTlvStream, ExperimentalInvoiceRequestTlvStream,
ExperimentalOfferTlvStream, ExperimentalInvoiceRequestTlvStream, ExperimentalInvoiceTlvStream,
);

type PartialInvoiceTlvStreamRef<'a> = (
Expand All @@ -1356,6 +1378,7 @@ type PartialInvoiceTlvStreamRef<'a> = (
InvoiceTlvStreamRef<'a>,
ExperimentalOfferTlvStreamRef,
ExperimentalInvoiceRequestTlvStreamRef,
ExperimentalInvoiceTlvStreamRef,
);

impl CursorReadable for PartialInvoiceTlvStream {
Expand All @@ -1366,11 +1389,12 @@ impl CursorReadable for PartialInvoiceTlvStream {
let invoice = CursorReadable::read(r)?;
let experimental_offer = CursorReadable::read(r)?;
let experimental_invoice_request = CursorReadable::read(r)?;
let experimental_invoice = CursorReadable::read(r)?;

Ok(
(
payer, offer, invoice_request, invoice, experimental_offer,
experimental_invoice_request,
experimental_invoice_request, experimental_invoice,
)
)
}
Expand All @@ -1386,11 +1410,13 @@ impl TryFrom<ParsedMessage<FullInvoiceTlvStream>> for Bolt12Invoice {
SignatureTlvStream { signature },
experimental_offer_tlv_stream,
experimental_invoice_request_tlv_stream,
experimental_invoice_tlv_stream,
) = tlv_stream;
let contents = InvoiceContents::try_from(
(
payer_tlv_stream, offer_tlv_stream, invoice_request_tlv_stream, invoice_tlv_stream,
experimental_offer_tlv_stream, experimental_invoice_request_tlv_stream,
experimental_invoice_tlv_stream,
)
)?;

Expand Down Expand Up @@ -1419,6 +1445,7 @@ impl TryFrom<PartialInvoiceTlvStream> for InvoiceContents {
},
experimental_offer_tlv_stream,
experimental_invoice_request_tlv_stream,
ExperimentalInvoiceTlvStream {},
) = tlv_stream;

if message_paths.is_some() { return Err(Bolt12SemanticError::UnexpectedPaths) }
Expand Down Expand Up @@ -1515,7 +1542,7 @@ pub(super) fn check_invoice_signing_pubkey(

#[cfg(test)]
mod tests {
use super::{Bolt12Invoice, DEFAULT_RELATIVE_EXPIRY, FallbackAddress, FullInvoiceTlvStreamRef, INVOICE_TYPES, InvoiceTlvStreamRef, SIGNATURE_TAG, UnsignedBolt12Invoice};
use super::{Bolt12Invoice, DEFAULT_RELATIVE_EXPIRY, ExperimentalInvoiceTlvStreamRef, FallbackAddress, FullInvoiceTlvStreamRef, INVOICE_TYPES, InvoiceTlvStreamRef, SIGNATURE_TAG, UnsignedBolt12Invoice};

use bitcoin::{CompressedPublicKey, WitnessProgram, WitnessVersion};
use bitcoin::constants::ChainHash;
Expand Down Expand Up @@ -1711,6 +1738,7 @@ mod tests {
ExperimentalInvoiceRequestTlvStreamRef {
experimental_bar: None,
},
ExperimentalInvoiceTlvStreamRef {},
),
);

Expand Down Expand Up @@ -1810,6 +1838,7 @@ mod tests {
ExperimentalInvoiceRequestTlvStreamRef {
experimental_bar: None,
},
ExperimentalInvoiceTlvStreamRef {},
),
);

Expand Down Expand Up @@ -2006,7 +2035,7 @@ mod tests {
.relative_expiry(one_hour.as_secs() as u32)
.build().unwrap()
.sign(recipient_sign).unwrap();
let (_, _, _, tlv_stream, _, _, _) = invoice.as_tlv_stream();
let (_, _, _, tlv_stream, _, _, _, _) = invoice.as_tlv_stream();
#[cfg(feature = "std")]
assert!(!invoice.is_expired());
assert_eq!(invoice.relative_expiry(), one_hour);
Expand All @@ -2022,7 +2051,7 @@ mod tests {
.relative_expiry(one_hour.as_secs() as u32 - 1)
.build().unwrap()
.sign(recipient_sign).unwrap();
let (_, _, _, tlv_stream, _, _, _) = invoice.as_tlv_stream();
let (_, _, _, tlv_stream, _, _, _, _) = invoice.as_tlv_stream();
#[cfg(feature = "std")]
assert!(invoice.is_expired());
assert_eq!(invoice.relative_expiry(), one_hour - Duration::from_secs(1));
Expand All @@ -2041,7 +2070,7 @@ mod tests {
.respond_with_no_std(payment_paths(), payment_hash(), now()).unwrap()
.build().unwrap()
.sign(recipient_sign).unwrap();
let (_, _, _, tlv_stream, _, _, _) = invoice.as_tlv_stream();
let (_, _, _, tlv_stream, _, _, _, _) = invoice.as_tlv_stream();
assert_eq!(invoice.amount_msats(), 1001);
assert_eq!(tlv_stream.amount, Some(1001));
}
Expand All @@ -2059,7 +2088,7 @@ mod tests {
.respond_with_no_std(payment_paths(), payment_hash(), now()).unwrap()
.build().unwrap()
.sign(recipient_sign).unwrap();
let (_, _, _, tlv_stream, _, _, _) = invoice.as_tlv_stream();
let (_, _, _, tlv_stream, _, _, _, _) = invoice.as_tlv_stream();
assert_eq!(invoice.amount_msats(), 2000);
assert_eq!(tlv_stream.amount, Some(2000));

Expand Down Expand Up @@ -2097,7 +2126,7 @@ mod tests {
.fallback_v1_p2tr_tweaked(&tweaked_pubkey)
.build().unwrap()
.sign(recipient_sign).unwrap();
let (_, _, _, tlv_stream, _, _, _) = invoice.as_tlv_stream();
let (_, _, _, tlv_stream, _, _, _, _) = invoice.as_tlv_stream();
assert_eq!(
invoice.fallbacks(),
vec![
Expand Down Expand Up @@ -2140,7 +2169,7 @@ mod tests {
.allow_mpp()
.build().unwrap()
.sign(recipient_sign).unwrap();
let (_, _, _, tlv_stream, _, _, _) = invoice.as_tlv_stream();
let (_, _, _, tlv_stream, _, _, _, _) = invoice.as_tlv_stream();
assert_eq!(invoice.invoice_features(), &features);
assert_eq!(tlv_stream.features, Some(&features));
}
Expand Down
12 changes: 8 additions & 4 deletions lightning/src/offers/invoice_request.rs
View file
Original file line number Diff line number Diff line change
Expand Up @@ -1539,7 +1539,7 @@ mod tests {
let (
payer_tlv_stream, offer_tlv_stream, mut invoice_request_tlv_stream,
mut invoice_tlv_stream, mut signature_tlv_stream, experimental_offer_tlv_stream,
experimental_invoice_request_tlv_stream,
experimental_invoice_request_tlv_stream, experimental_invoice_tlv_stream,
) = invoice.as_tlv_stream();
invoice_request_tlv_stream.amount = Some(2000);
invoice_tlv_stream.amount = Some(2000);
Expand All @@ -1548,6 +1548,7 @@ mod tests {
(payer_tlv_stream, offer_tlv_stream, invoice_request_tlv_stream, invoice_tlv_stream);
let experimental_tlv_stream = (
experimental_offer_tlv_stream, experimental_invoice_request_tlv_stream,
experimental_invoice_tlv_stream,
);
let mut bytes = Vec::new();
(&tlv_stream, &experimental_tlv_stream).write(&mut bytes).unwrap();
Expand All @@ -1568,7 +1569,7 @@ mod tests {
let (
mut payer_tlv_stream, offer_tlv_stream, invoice_request_tlv_stream, invoice_tlv_stream,
mut signature_tlv_stream, experimental_offer_tlv_stream,
experimental_invoice_request_tlv_stream,
experimental_invoice_request_tlv_stream, experimental_invoice_tlv_stream,
) = invoice.as_tlv_stream();
let metadata = payer_tlv_stream.metadata.unwrap().iter().copied().rev().collect();
payer_tlv_stream.metadata = Some(&metadata);
Expand All @@ -1577,6 +1578,7 @@ mod tests {
(payer_tlv_stream, offer_tlv_stream, invoice_request_tlv_stream, invoice_tlv_stream);
let experimental_tlv_stream = (
experimental_offer_tlv_stream, experimental_invoice_request_tlv_stream,
experimental_invoice_tlv_stream,
);
let mut bytes = Vec::new();
(&tlv_stream, &experimental_tlv_stream).write(&mut bytes).unwrap();
Expand Down Expand Up @@ -1626,7 +1628,7 @@ mod tests {
let (
payer_tlv_stream, offer_tlv_stream, mut invoice_request_tlv_stream,
mut invoice_tlv_stream, mut signature_tlv_stream, experimental_offer_tlv_stream,
experimental_invoice_request_tlv_stream,
experimental_invoice_request_tlv_stream, experimental_invoice_tlv_stream,
) = invoice.as_tlv_stream();
invoice_request_tlv_stream.amount = Some(2000);
invoice_tlv_stream.amount = Some(2000);
Expand All @@ -1635,6 +1637,7 @@ mod tests {
(payer_tlv_stream, offer_tlv_stream, invoice_request_tlv_stream, invoice_tlv_stream);
let experimental_tlv_stream = (
experimental_offer_tlv_stream, experimental_invoice_request_tlv_stream,
experimental_invoice_tlv_stream,
);
let mut bytes = Vec::new();
(&tlv_stream, &experimental_tlv_stream).write(&mut bytes).unwrap();
Expand All @@ -1657,7 +1660,7 @@ mod tests {
let (
payer_tlv_stream, offer_tlv_stream, mut invoice_request_tlv_stream, invoice_tlv_stream,
mut signature_tlv_stream, experimental_offer_tlv_stream,
experimental_invoice_request_tlv_stream,
experimental_invoice_request_tlv_stream, experimental_invoice_tlv_stream,
) = invoice.as_tlv_stream();
let payer_id = pubkey(1);
invoice_request_tlv_stream.payer_id = Some(&payer_id);
Expand All @@ -1666,6 +1669,7 @@ mod tests {
(payer_tlv_stream, offer_tlv_stream, invoice_request_tlv_stream, invoice_tlv_stream);
let experimental_tlv_stream = (
experimental_offer_tlv_stream, experimental_invoice_request_tlv_stream,
experimental_invoice_tlv_stream,
);
let mut bytes = Vec::new();
(&tlv_stream, &experimental_tlv_stream).write(&mut bytes).unwrap();
Expand Down
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