1 // This file is Copyright its original authors, visible in version control
4 // This file is licensed under the Apache License, Version 2.0 <LICENSE-APACHE
5 // or http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
6 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your option.
7 // You may not use this file except in accordance with one or both of these
10 //! Data structures and encoding for `offer` messages.
12 //! An [`Offer`] represents an "offer to be paid." It is typically constructed by a merchant and
13 //! published as a QR code to be scanned by a customer. The customer uses the offer to request an
14 //! invoice from the merchant to be paid.
19 //! extern crate bitcoin;
20 //! extern crate core;
21 //! extern crate lightning;
23 //! use core::convert::TryFrom;
24 //! use core::num::NonZeroU64;
25 //! use core::time::Duration;
27 //! use bitcoin::secp256k1::{KeyPair, PublicKey, Secp256k1, SecretKey};
28 //! use lightning::offers::offer::{Offer, OfferBuilder, Quantity};
29 //! use lightning::offers::parse::Bolt12ParseError;
30 //! use lightning::util::ser::{Readable, Writeable};
32 //! # use lightning::blinded_path::BlindedPath;
33 //! # #[cfg(feature = "std")]
34 //! # use std::time::SystemTime;
36 //! # fn create_blinded_path() -> BlindedPath { unimplemented!() }
37 //! # fn create_another_blinded_path() -> BlindedPath { unimplemented!() }
39 //! # #[cfg(feature = "std")]
40 //! # fn build() -> Result<(), Bolt12ParseError> {
41 //! let secp_ctx = Secp256k1::new();
42 //! let keys = KeyPair::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[42; 32]).unwrap());
43 //! let pubkey = PublicKey::from(keys);
45 //! let expiration = SystemTime::now() + Duration::from_secs(24 * 60 * 60);
46 //! let offer = OfferBuilder::new("coffee, large".to_string(), pubkey)
47 //! .amount_msats(20_000)
48 //! .supported_quantity(Quantity::Unbounded)
49 //! .absolute_expiry(expiration.duration_since(SystemTime::UNIX_EPOCH).unwrap())
50 //! .issuer("Foo Bar".to_string())
51 //! .path(create_blinded_path())
52 //! .path(create_another_blinded_path())
55 //! // Encode as a bech32 string for use in a QR code.
56 //! let encoded_offer = offer.to_string();
58 //! // Parse from a bech32 string after scanning from a QR code.
59 //! let offer = encoded_offer.parse::<Offer>()?;
61 //! // Encode offer as raw bytes.
62 //! let mut bytes = Vec::new();
63 //! offer.write(&mut bytes).unwrap();
65 //! // Decode raw bytes into an offer.
66 //! let offer = Offer::try_from(bytes)?;
73 //! If constructing an [`Offer`] for use with a [`ChannelManager`], use
74 //! [`ChannelManager::create_offer_builder`] instead of [`OfferBuilder::new`].
76 //! [`ChannelManager`]: crate::ln::channelmanager::ChannelManager
77 //! [`ChannelManager::create_offer_builder`]: crate::ln::channelmanager::ChannelManager::create_offer_builder
79 use bitcoin::blockdata::constants::ChainHash;
80 use bitcoin::network::constants::Network;
81 use bitcoin::secp256k1::{KeyPair, PublicKey, Secp256k1, self};
82 use core::hash::{Hash, Hasher};
83 use core::num::NonZeroU64;
85 use core::str::FromStr;
86 use core::time::Duration;
87 use crate::sign::EntropySource;
89 use crate::blinded_path::BlindedPath;
90 use crate::ln::channelmanager::PaymentId;
91 use crate::ln::features::OfferFeatures;
92 use crate::ln::inbound_payment::{ExpandedKey, IV_LEN, Nonce};
93 use crate::ln::msgs::MAX_VALUE_MSAT;
94 use crate::offers::merkle::TlvStream;
95 use crate::offers::parse::{Bech32Encode, Bolt12ParseError, Bolt12SemanticError, ParsedMessage};
96 use crate::offers::signer::{Metadata, MetadataMaterial, self};
97 use crate::util::ser::{HighZeroBytesDroppedBigSize, WithoutLength, Writeable, Writer};
98 use crate::util::string::PrintableString;
100 #[cfg(not(c_bindings))]
102 crate::offers::invoice_request::{DerivedPayerId, ExplicitPayerId, InvoiceRequestBuilder},
106 crate::offers::invoice_request::{InvoiceRequestWithDerivedPayerIdBuilder, InvoiceRequestWithExplicitPayerIdBuilder},
109 #[allow(unused_imports)]
110 use crate::prelude::*;
112 #[cfg(feature = "std")]
113 use std::time::SystemTime;
115 pub(super) const IV_BYTES: &[u8; IV_LEN] = b"LDK Offer ~~~~~~";
117 /// Builds an [`Offer`] for the "offer to be paid" flow.
119 /// See [module-level documentation] for usage.
121 /// This is not exported to bindings users as builder patterns don't map outside of move semantics.
123 /// [module-level documentation]: self
124 pub struct OfferBuilder<'a, M: MetadataStrategy, T: secp256k1::Signing> {
125 offer: OfferContents,
126 metadata_strategy: core::marker::PhantomData<M>,
127 secp_ctx: Option<&'a Secp256k1<T>>,
130 /// Builds an [`Offer`] for the "offer to be paid" flow.
132 /// See [module-level documentation] for usage.
134 /// This is not exported to bindings users as builder patterns don't map outside of move semantics.
136 /// [module-level documentation]: self
138 pub struct OfferWithExplicitMetadataBuilder<'a> {
139 offer: OfferContents,
140 metadata_strategy: core::marker::PhantomData<ExplicitMetadata>,
141 secp_ctx: Option<&'a Secp256k1<secp256k1::All>>,
144 /// Builds an [`Offer`] for the "offer to be paid" flow.
146 /// See [module-level documentation] for usage.
148 /// This is not exported to bindings users as builder patterns don't map outside of move semantics.
150 /// [module-level documentation]: self
152 pub struct OfferWithDerivedMetadataBuilder<'a> {
153 offer: OfferContents,
154 metadata_strategy: core::marker::PhantomData<DerivedMetadata>,
155 secp_ctx: Option<&'a Secp256k1<secp256k1::All>>,
158 /// Indicates how [`Offer::metadata`] may be set.
160 /// This is not exported to bindings users as builder patterns don't map outside of move semantics.
161 pub trait MetadataStrategy {}
163 /// [`Offer::metadata`] may be explicitly set or left empty.
165 /// This is not exported to bindings users as builder patterns don't map outside of move semantics.
166 pub struct ExplicitMetadata {}
168 /// [`Offer::metadata`] will be derived.
170 /// This is not exported to bindings users as builder patterns don't map outside of move semantics.
171 pub struct DerivedMetadata {}
173 impl MetadataStrategy for ExplicitMetadata {}
175 impl MetadataStrategy for DerivedMetadata {}
177 macro_rules! offer_explicit_metadata_builder_methods { (
178 $self: ident, $self_type: ty, $return_type: ty, $return_value: expr
180 /// Creates a new builder for an offer setting the [`Offer::description`] and using the
181 /// [`Offer::signing_pubkey`] for signing invoices. The associated secret key must be remembered
182 /// while the offer is valid.
184 /// Use a different pubkey per offer to avoid correlating offers.
188 /// If constructing an [`Offer`] for use with a [`ChannelManager`], use
189 /// [`ChannelManager::create_offer_builder`] instead of [`OfferBuilder::new`].
191 /// [`ChannelManager`]: crate::ln::channelmanager::ChannelManager
192 /// [`ChannelManager::create_offer_builder`]: crate::ln::channelmanager::ChannelManager::create_offer_builder
193 pub fn new(description: String, signing_pubkey: PublicKey) -> Self {
195 offer: OfferContents {
196 chains: None, metadata: None, amount: None, description,
197 features: OfferFeatures::empty(), absolute_expiry: None, issuer: None, paths: None,
198 supported_quantity: Quantity::One, signing_pubkey,
200 metadata_strategy: core::marker::PhantomData,
205 /// Sets the [`Offer::metadata`] to the given bytes.
207 /// Successive calls to this method will override the previous setting.
208 pub fn metadata(mut $self: $self_type, metadata: Vec<u8>) -> Result<$return_type, Bolt12SemanticError> {
209 $self.offer.metadata = Some(Metadata::Bytes(metadata));
214 macro_rules! offer_derived_metadata_builder_methods { ($secp_context: ty) => {
215 /// Similar to [`OfferBuilder::new`] except, if [`OfferBuilder::path`] is called, the signing
216 /// pubkey is derived from the given [`ExpandedKey`] and [`EntropySource`]. This provides
217 /// recipient privacy by using a different signing pubkey for each offer. Otherwise, the
218 /// provided `node_id` is used for the signing pubkey.
220 /// Also, sets the metadata when [`OfferBuilder::build`] is called such that it can be used by
221 /// [`InvoiceRequest::verify`] to determine if the request was produced for the offer given an
224 /// [`InvoiceRequest::verify`]: crate::offers::invoice_request::InvoiceRequest::verify
225 /// [`ExpandedKey`]: crate::ln::inbound_payment::ExpandedKey
226 pub fn deriving_signing_pubkey<ES: Deref>(
227 description: String, node_id: PublicKey, expanded_key: &ExpandedKey, entropy_source: ES,
228 secp_ctx: &'a Secp256k1<$secp_context>
229 ) -> Self where ES::Target: EntropySource {
230 let nonce = Nonce::from_entropy_source(entropy_source);
231 let derivation_material = MetadataMaterial::new(nonce, expanded_key, IV_BYTES, None);
232 let metadata = Metadata::DerivedSigningPubkey(derivation_material);
234 offer: OfferContents {
235 chains: None, metadata: Some(metadata), amount: None, description,
236 features: OfferFeatures::empty(), absolute_expiry: None, issuer: None, paths: None,
237 supported_quantity: Quantity::One, signing_pubkey: node_id,
239 metadata_strategy: core::marker::PhantomData,
240 secp_ctx: Some(secp_ctx),
245 macro_rules! offer_builder_methods { (
246 $self: ident, $self_type: ty, $return_type: ty, $return_value: expr $(, $self_mut: tt)?
248 /// Adds the chain hash of the given [`Network`] to [`Offer::chains`]. If not called,
249 /// the chain hash of [`Network::Bitcoin`] is assumed to be the only one supported.
251 /// See [`Offer::chains`] on how this relates to the payment currency.
253 /// Successive calls to this method will add another chain hash.
254 pub fn chain($self: $self_type, network: Network) -> $return_type {
255 $self.chain_hash(ChainHash::using_genesis_block(network))
258 /// Adds the [`ChainHash`] to [`Offer::chains`]. If not called, the chain hash of
259 /// [`Network::Bitcoin`] is assumed to be the only one supported.
261 /// See [`Offer::chains`] on how this relates to the payment currency.
263 /// Successive calls to this method will add another chain hash.
264 pub(crate) fn chain_hash($($self_mut)* $self: $self_type, chain: ChainHash) -> $return_type {
265 let chains = $self.offer.chains.get_or_insert_with(Vec::new);
266 if !chains.contains(&chain) {
273 /// Sets the [`Offer::amount`] as an [`Amount::Bitcoin`].
275 /// Successive calls to this method will override the previous setting.
276 pub fn amount_msats($self: $self_type, amount_msats: u64) -> $return_type {
277 $self.amount(Amount::Bitcoin { amount_msats })
280 /// Sets the [`Offer::amount`].
282 /// Successive calls to this method will override the previous setting.
283 pub(super) fn amount($($self_mut)* $self: $self_type, amount: Amount) -> $return_type {
284 $self.offer.amount = Some(amount);
288 /// Sets the [`Offer::absolute_expiry`] as seconds since the Unix epoch. Any expiry that has
289 /// already passed is valid and can be checked for using [`Offer::is_expired`].
291 /// Successive calls to this method will override the previous setting.
292 pub fn absolute_expiry($($self_mut)* $self: $self_type, absolute_expiry: Duration) -> $return_type {
293 $self.offer.absolute_expiry = Some(absolute_expiry);
297 /// Sets the [`Offer::issuer`].
299 /// Successive calls to this method will override the previous setting.
300 pub fn issuer($($self_mut)* $self: $self_type, issuer: String) -> $return_type {
301 $self.offer.issuer = Some(issuer);
305 /// Adds a blinded path to [`Offer::paths`]. Must include at least one path if only connected by
306 /// private channels or if [`Offer::signing_pubkey`] is not a public node id.
308 /// Successive calls to this method will add another blinded path. Caller is responsible for not
309 /// adding duplicate paths.
310 pub fn path($($self_mut)* $self: $self_type, path: BlindedPath) -> $return_type {
311 $self.offer.paths.get_or_insert_with(Vec::new).push(path);
315 /// Sets the quantity of items for [`Offer::supported_quantity`]. If not called, defaults to
316 /// [`Quantity::One`].
318 /// Successive calls to this method will override the previous setting.
319 pub fn supported_quantity($($self_mut)* $self: $self_type, quantity: Quantity) -> $return_type {
320 $self.offer.supported_quantity = quantity;
324 /// Builds an [`Offer`] from the builder's settings.
325 pub fn build($($self_mut)* $self: $self_type) -> Result<Offer, Bolt12SemanticError> {
326 match $self.offer.amount {
327 Some(Amount::Bitcoin { amount_msats }) => {
328 if amount_msats > MAX_VALUE_MSAT {
329 return Err(Bolt12SemanticError::InvalidAmount);
332 Some(Amount::Currency { .. }) => return Err(Bolt12SemanticError::UnsupportedCurrency),
336 if let Some(chains) = &$self.offer.chains {
337 if chains.len() == 1 && chains[0] == $self.offer.implied_chain() {
338 $self.offer.chains = None;
342 Ok($self.build_without_checks())
345 fn build_without_checks($($self_mut)* $self: $self_type) -> Offer {
346 // Create the metadata for stateless verification of an InvoiceRequest.
347 if let Some(mut metadata) = $self.offer.metadata.take() {
348 if metadata.has_derivation_material() {
349 if $self.offer.paths.is_none() {
350 metadata = metadata.without_keys();
353 let mut tlv_stream = $self.offer.as_tlv_stream();
354 debug_assert_eq!(tlv_stream.metadata, None);
355 tlv_stream.metadata = None;
356 if metadata.derives_recipient_keys() {
357 tlv_stream.node_id = None;
360 let (derived_metadata, keys) = metadata.derive_from(tlv_stream, $self.secp_ctx);
361 metadata = derived_metadata;
362 if let Some(keys) = keys {
363 $self.offer.signing_pubkey = keys.public_key();
367 $self.offer.metadata = Some(metadata);
370 let mut bytes = Vec::new();
371 $self.offer.write(&mut bytes).unwrap();
375 #[cfg(not(c_bindings))]
376 contents: $self.offer,
378 contents: $self.offer.clone()
384 macro_rules! offer_builder_test_methods { (
385 $self: ident, $self_type: ty, $return_type: ty, $return_value: expr $(, $self_mut: tt)?
387 #[cfg_attr(c_bindings, allow(dead_code))]
388 fn features_unchecked($($self_mut)* $self: $self_type, features: OfferFeatures) -> $return_type {
389 $self.offer.features = features;
393 #[cfg_attr(c_bindings, allow(dead_code))]
394 pub(crate) fn clear_chains($($self_mut)* $self: $self_type) -> $return_type {
395 $self.offer.chains = None;
399 #[cfg_attr(c_bindings, allow(dead_code))]
400 pub(crate) fn clear_paths($($self_mut)* $self: $self_type) -> $return_type {
401 $self.offer.paths = None;
405 #[cfg_attr(c_bindings, allow(dead_code))]
406 pub(super) fn build_unchecked($self: $self_type) -> Offer {
407 $self.build_without_checks()
411 impl<'a, M: MetadataStrategy, T: secp256k1::Signing> OfferBuilder<'a, M, T> {
412 offer_builder_methods!(self, Self, Self, self, mut);
415 offer_builder_test_methods!(self, Self, Self, self, mut);
418 impl<'a> OfferBuilder<'a, ExplicitMetadata, secp256k1::SignOnly> {
419 offer_explicit_metadata_builder_methods!(self, Self, Self, self);
422 impl<'a, T: secp256k1::Signing> OfferBuilder<'a, DerivedMetadata, T> {
423 offer_derived_metadata_builder_methods!(T);
426 #[cfg(all(c_bindings, not(test)))]
427 impl<'a> OfferWithExplicitMetadataBuilder<'a> {
428 offer_explicit_metadata_builder_methods!(self, &mut Self, (), ());
429 offer_builder_methods!(self, &mut Self, (), ());
432 #[cfg(all(c_bindings, test))]
433 impl<'a> OfferWithExplicitMetadataBuilder<'a> {
434 offer_explicit_metadata_builder_methods!(self, &mut Self, &mut Self, self);
435 offer_builder_methods!(self, &mut Self, &mut Self, self);
436 offer_builder_test_methods!(self, &mut Self, &mut Self, self);
439 #[cfg(all(c_bindings, not(test)))]
440 impl<'a> OfferWithDerivedMetadataBuilder<'a> {
441 offer_derived_metadata_builder_methods!(secp256k1::All);
442 offer_builder_methods!(self, &mut Self, (), ());
445 #[cfg(all(c_bindings, test))]
446 impl<'a> OfferWithDerivedMetadataBuilder<'a> {
447 offer_derived_metadata_builder_methods!(secp256k1::All);
448 offer_builder_methods!(self, &mut Self, &mut Self, self);
449 offer_builder_test_methods!(self, &mut Self, &mut Self, self);
453 impl<'a> From<OfferBuilder<'a, DerivedMetadata, secp256k1::All>>
454 for OfferWithDerivedMetadataBuilder<'a> {
455 fn from(builder: OfferBuilder<'a, DerivedMetadata, secp256k1::All>) -> Self {
456 let OfferBuilder { offer, metadata_strategy, secp_ctx } = builder;
458 Self { offer, metadata_strategy, secp_ctx }
463 impl<'a> From<OfferWithDerivedMetadataBuilder<'a>>
464 for OfferBuilder<'a, DerivedMetadata, secp256k1::All> {
465 fn from(builder: OfferWithDerivedMetadataBuilder<'a>) -> Self {
466 let OfferWithDerivedMetadataBuilder { offer, metadata_strategy, secp_ctx } = builder;
468 Self { offer, metadata_strategy, secp_ctx }
472 /// An `Offer` is a potentially long-lived proposal for payment of a good or service.
474 /// An offer is a precursor to an [`InvoiceRequest`]. A merchant publishes an offer from which a
475 /// customer may request an [`Bolt12Invoice`] for a specific quantity and using an amount sufficient
476 /// to cover that quantity (i.e., at least `quantity * amount`). See [`Offer::amount`].
478 /// Offers may be denominated in currency other than bitcoin but are ultimately paid using the
481 /// Through the use of [`BlindedPath`]s, offers provide recipient privacy.
483 /// [`InvoiceRequest`]: crate::offers::invoice_request::InvoiceRequest
484 /// [`Bolt12Invoice`]: crate::offers::invoice::Bolt12Invoice
485 #[derive(Clone, Debug)]
487 // The serialized offer. Needed when creating an `InvoiceRequest` if the offer contains unknown
489 pub(super) bytes: Vec<u8>,
490 pub(super) contents: OfferContents,
493 /// The contents of an [`Offer`], which may be shared with an [`InvoiceRequest`] or a
494 /// [`Bolt12Invoice`].
496 /// [`InvoiceRequest`]: crate::offers::invoice_request::InvoiceRequest
497 /// [`Bolt12Invoice`]: crate::offers::invoice::Bolt12Invoice
498 #[derive(Clone, Debug)]
499 #[cfg_attr(test, derive(PartialEq))]
500 pub(super) struct OfferContents {
501 chains: Option<Vec<ChainHash>>,
502 metadata: Option<Metadata>,
503 amount: Option<Amount>,
505 features: OfferFeatures,
506 absolute_expiry: Option<Duration>,
507 issuer: Option<String>,
508 paths: Option<Vec<BlindedPath>>,
509 supported_quantity: Quantity,
510 signing_pubkey: PublicKey,
513 macro_rules! offer_accessors { ($self: ident, $contents: expr) => {
514 // TODO: Return a slice once ChainHash has constants.
515 // - https://github.com/rust-bitcoin/rust-bitcoin/pull/1283
516 // - https://github.com/rust-bitcoin/rust-bitcoin/pull/1286
517 /// The chains that may be used when paying a requested invoice (e.g., bitcoin mainnet).
518 /// Payments must be denominated in units of the minimal lightning-payable unit (e.g., msats)
519 /// for the selected chain.
520 pub fn chains(&$self) -> Vec<bitcoin::blockdata::constants::ChainHash> {
524 // TODO: Link to corresponding method in `InvoiceRequest`.
525 /// Opaque bytes set by the originator. Useful for authentication and validating fields since it
526 /// is reflected in `invoice_request` messages along with all the other fields from the `offer`.
527 pub fn metadata(&$self) -> Option<&Vec<u8>> {
531 /// The minimum amount required for a successful payment of a single item.
532 pub fn amount(&$self) -> Option<&$crate::offers::offer::Amount> {
536 /// A complete description of the purpose of the payment. Intended to be displayed to the user
537 /// but with the caveat that it has not been verified in any way.
538 pub fn description(&$self) -> $crate::util::string::PrintableString {
539 $contents.description()
542 /// Features pertaining to the offer.
543 pub fn offer_features(&$self) -> &$crate::ln::features::OfferFeatures {
544 &$contents.features()
547 /// Duration since the Unix epoch when an invoice should no longer be requested.
549 /// If `None`, the offer does not expire.
550 pub fn absolute_expiry(&$self) -> Option<core::time::Duration> {
551 $contents.absolute_expiry()
554 /// The issuer of the offer, possibly beginning with `user@domain` or `domain`. Intended to be
555 /// displayed to the user but with the caveat that it has not been verified in any way.
556 pub fn issuer(&$self) -> Option<$crate::util::string::PrintableString> {
560 /// Paths to the recipient originating from publicly reachable nodes. Blinded paths provide
561 /// recipient privacy by obfuscating its node id.
562 pub fn paths(&$self) -> &[$crate::blinded_path::BlindedPath] {
566 /// The quantity of items supported.
567 pub fn supported_quantity(&$self) -> $crate::offers::offer::Quantity {
568 $contents.supported_quantity()
571 /// The public key used by the recipient to sign invoices.
572 pub fn signing_pubkey(&$self) -> bitcoin::secp256k1::PublicKey {
573 $contents.signing_pubkey()
578 offer_accessors!(self, self.contents);
580 pub(super) fn implied_chain(&self) -> ChainHash {
581 self.contents.implied_chain()
584 /// Returns whether the given chain is supported by the offer.
585 pub fn supports_chain(&self, chain: ChainHash) -> bool {
586 self.contents.supports_chain(chain)
589 /// Whether the offer has expired.
590 #[cfg(feature = "std")]
591 pub fn is_expired(&self) -> bool {
592 self.contents.is_expired()
595 /// Whether the offer has expired given the duration since the Unix epoch.
596 pub fn is_expired_no_std(&self, duration_since_epoch: Duration) -> bool {
597 self.contents.is_expired_no_std(duration_since_epoch)
600 /// Returns whether the given quantity is valid for the offer.
601 pub fn is_valid_quantity(&self, quantity: u64) -> bool {
602 self.contents.is_valid_quantity(quantity)
605 /// Returns whether a quantity is expected in an [`InvoiceRequest`] for the offer.
607 /// [`InvoiceRequest`]: crate::offers::invoice_request::InvoiceRequest
608 pub fn expects_quantity(&self) -> bool {
609 self.contents.expects_quantity()
613 macro_rules! request_invoice_derived_payer_id { ($self: ident, $builder: ty) => {
614 /// Similar to [`Offer::request_invoice`] except it:
615 /// - derives the [`InvoiceRequest::payer_id`] such that a different key can be used for each
617 /// - sets [`InvoiceRequest::payer_metadata`] when [`InvoiceRequestBuilder::build`] is called
618 /// such that it can be used by [`Bolt12Invoice::verify`] to determine if the invoice was
619 /// requested using a base [`ExpandedKey`] from which the payer id was derived, and
620 /// - includes the [`PaymentId`] encrypted in [`InvoiceRequest::payer_metadata`] so that it can
621 /// be used when sending the payment for the requested invoice.
623 /// Useful to protect the sender's privacy.
625 /// [`InvoiceRequest::payer_id`]: crate::offers::invoice_request::InvoiceRequest::payer_id
626 /// [`InvoiceRequest::payer_metadata`]: crate::offers::invoice_request::InvoiceRequest::payer_metadata
627 /// [`Bolt12Invoice::verify`]: crate::offers::invoice::Bolt12Invoice::verify
628 /// [`ExpandedKey`]: crate::ln::inbound_payment::ExpandedKey
629 pub fn request_invoice_deriving_payer_id<
631 #[cfg(not(c_bindings))]
632 T: secp256k1::Signing
634 &'a $self, expanded_key: &ExpandedKey, entropy_source: ES,
635 #[cfg(not(c_bindings))]
636 secp_ctx: &'b Secp256k1<T>,
638 secp_ctx: &'b Secp256k1<secp256k1::All>,
639 payment_id: PaymentId
640 ) -> Result<$builder, Bolt12SemanticError>
642 ES::Target: EntropySource,
644 if $self.offer_features().requires_unknown_bits() {
645 return Err(Bolt12SemanticError::UnknownRequiredFeatures);
648 Ok(<$builder>::deriving_payer_id($self, expanded_key, entropy_source, secp_ctx, payment_id))
652 macro_rules! request_invoice_explicit_payer_id { ($self: ident, $builder: ty) => {
653 /// Similar to [`Offer::request_invoice_deriving_payer_id`] except uses `payer_id` for the
654 /// [`InvoiceRequest::payer_id`] instead of deriving a different key for each request.
656 /// Useful for recurring payments using the same `payer_id` with different invoices.
658 /// [`InvoiceRequest::payer_id`]: crate::offers::invoice_request::InvoiceRequest::payer_id
659 pub fn request_invoice_deriving_metadata<ES: Deref>(
660 &$self, payer_id: PublicKey, expanded_key: &ExpandedKey, entropy_source: ES,
661 payment_id: PaymentId
662 ) -> Result<$builder, Bolt12SemanticError>
664 ES::Target: EntropySource,
666 if $self.offer_features().requires_unknown_bits() {
667 return Err(Bolt12SemanticError::UnknownRequiredFeatures);
670 Ok(<$builder>::deriving_metadata($self, payer_id, expanded_key, entropy_source, payment_id))
673 /// Creates an [`InvoiceRequestBuilder`] for the offer with the given `metadata` and `payer_id`,
674 /// which will be reflected in the `Bolt12Invoice` response.
676 /// The `metadata` is useful for including information about the derivation of `payer_id` such
677 /// that invoice response handling can be stateless. Also serves as payer-provided entropy while
678 /// hashing in the signature calculation.
680 /// This should not leak any information such as by using a simple BIP-32 derivation path.
681 /// Otherwise, payments may be correlated.
683 /// Errors if the offer contains unknown required features.
685 /// [`InvoiceRequest`]: crate::offers::invoice_request::InvoiceRequest
686 pub fn request_invoice(
687 &$self, metadata: Vec<u8>, payer_id: PublicKey
688 ) -> Result<$builder, Bolt12SemanticError> {
689 if $self.offer_features().requires_unknown_bits() {
690 return Err(Bolt12SemanticError::UnknownRequiredFeatures);
693 Ok(<$builder>::new($self, metadata, payer_id))
697 #[cfg(not(c_bindings))]
699 request_invoice_derived_payer_id!(self, InvoiceRequestBuilder<'a, 'b, DerivedPayerId, T>);
700 request_invoice_explicit_payer_id!(self, InvoiceRequestBuilder<ExplicitPayerId, secp256k1::SignOnly>);
705 request_invoice_derived_payer_id!(self, InvoiceRequestWithDerivedPayerIdBuilder<'a, 'b>);
706 request_invoice_explicit_payer_id!(self, InvoiceRequestWithExplicitPayerIdBuilder);
711 pub(super) fn as_tlv_stream(&self) -> OfferTlvStreamRef {
712 self.contents.as_tlv_stream()
716 impl AsRef<[u8]> for Offer {
717 fn as_ref(&self) -> &[u8] {
722 impl PartialEq for Offer {
723 fn eq(&self, other: &Self) -> bool {
724 self.bytes.eq(&other.bytes)
730 impl Hash for Offer {
731 fn hash<H: Hasher>(&self, state: &mut H) {
732 self.bytes.hash(state);
737 pub fn chains(&self) -> Vec<ChainHash> {
738 self.chains.as_ref().cloned().unwrap_or_else(|| vec![self.implied_chain()])
741 pub fn implied_chain(&self) -> ChainHash {
742 ChainHash::using_genesis_block(Network::Bitcoin)
745 pub fn supports_chain(&self, chain: ChainHash) -> bool {
746 self.chains().contains(&chain)
749 pub fn metadata(&self) -> Option<&Vec<u8>> {
750 self.metadata.as_ref().and_then(|metadata| metadata.as_bytes())
753 pub fn amount(&self) -> Option<&Amount> {
757 pub fn description(&self) -> PrintableString {
758 PrintableString(&self.description)
761 pub fn features(&self) -> &OfferFeatures {
765 pub fn absolute_expiry(&self) -> Option<Duration> {
769 #[cfg(feature = "std")]
770 pub(super) fn is_expired(&self) -> bool {
771 SystemTime::UNIX_EPOCH
773 .map(|duration_since_epoch| self.is_expired_no_std(duration_since_epoch))
777 pub(super) fn is_expired_no_std(&self, duration_since_epoch: Duration) -> bool {
779 .map(|absolute_expiry| duration_since_epoch > absolute_expiry)
783 pub fn issuer(&self) -> Option<PrintableString> {
784 self.issuer.as_ref().map(|issuer| PrintableString(issuer.as_str()))
787 pub fn paths(&self) -> &[BlindedPath] {
788 self.paths.as_ref().map(|paths| paths.as_slice()).unwrap_or(&[])
791 pub(super) fn check_amount_msats_for_quantity(
792 &self, amount_msats: Option<u64>, quantity: Option<u64>
793 ) -> Result<(), Bolt12SemanticError> {
794 let offer_amount_msats = match self.amount {
796 Some(Amount::Bitcoin { amount_msats }) => amount_msats,
797 Some(Amount::Currency { .. }) => return Err(Bolt12SemanticError::UnsupportedCurrency),
800 if !self.expects_quantity() || quantity.is_some() {
801 let expected_amount_msats = offer_amount_msats.checked_mul(quantity.unwrap_or(1))
802 .ok_or(Bolt12SemanticError::InvalidAmount)?;
803 let amount_msats = amount_msats.unwrap_or(expected_amount_msats);
805 if amount_msats < expected_amount_msats {
806 return Err(Bolt12SemanticError::InsufficientAmount);
809 if amount_msats > MAX_VALUE_MSAT {
810 return Err(Bolt12SemanticError::InvalidAmount);
817 pub fn supported_quantity(&self) -> Quantity {
818 self.supported_quantity
821 pub(super) fn check_quantity(&self, quantity: Option<u64>) -> Result<(), Bolt12SemanticError> {
822 let expects_quantity = self.expects_quantity();
824 None if expects_quantity => Err(Bolt12SemanticError::MissingQuantity),
825 Some(_) if !expects_quantity => Err(Bolt12SemanticError::UnexpectedQuantity),
826 Some(quantity) if !self.is_valid_quantity(quantity) => {
827 Err(Bolt12SemanticError::InvalidQuantity)
833 fn is_valid_quantity(&self, quantity: u64) -> bool {
834 match self.supported_quantity {
835 Quantity::Bounded(n) => quantity <= n.get(),
836 Quantity::Unbounded => quantity > 0,
837 Quantity::One => quantity == 1,
841 fn expects_quantity(&self) -> bool {
842 match self.supported_quantity {
843 Quantity::Bounded(_) => true,
844 Quantity::Unbounded => true,
845 Quantity::One => false,
849 pub(super) fn signing_pubkey(&self) -> PublicKey {
853 /// Verifies that the offer metadata was produced from the offer in the TLV stream.
854 pub(super) fn verify<T: secp256k1::Signing>(
855 &self, bytes: &[u8], key: &ExpandedKey, secp_ctx: &Secp256k1<T>
856 ) -> Result<Option<KeyPair>, ()> {
857 match self.metadata() {
859 let tlv_stream = TlvStream::new(bytes).range(OFFER_TYPES).filter(|record| {
860 match record.r#type {
861 OFFER_METADATA_TYPE => false,
862 OFFER_NODE_ID_TYPE => {
863 !self.metadata.as_ref().unwrap().derives_recipient_keys()
868 signer::verify_recipient_metadata(
869 metadata, key, IV_BYTES, self.signing_pubkey(), tlv_stream, secp_ctx
876 pub(super) fn as_tlv_stream(&self) -> OfferTlvStreamRef {
877 let (currency, amount) = match &self.amount {
878 None => (None, None),
879 Some(Amount::Bitcoin { amount_msats }) => (None, Some(*amount_msats)),
880 Some(Amount::Currency { iso4217_code, amount }) => (
881 Some(iso4217_code), Some(*amount)
886 if self.features == OfferFeatures::empty() { None } else { Some(&self.features) }
890 chains: self.chains.as_ref(),
891 metadata: self.metadata(),
894 description: Some(&self.description),
896 absolute_expiry: self.absolute_expiry.map(|duration| duration.as_secs()),
897 paths: self.paths.as_ref(),
898 issuer: self.issuer.as_ref(),
899 quantity_max: self.supported_quantity.to_tlv_record(),
900 node_id: Some(&self.signing_pubkey),
905 impl Writeable for Offer {
906 fn write<W: Writer>(&self, writer: &mut W) -> Result<(), io::Error> {
907 WithoutLength(&self.bytes).write(writer)
911 impl Writeable for OfferContents {
912 fn write<W: Writer>(&self, writer: &mut W) -> Result<(), io::Error> {
913 self.as_tlv_stream().write(writer)
917 /// The minimum amount required for an item in an [`Offer`], denominated in either bitcoin or
918 /// another currency.
919 #[derive(Clone, Debug, PartialEq)]
921 /// An amount of bitcoin.
923 /// The amount in millisatoshi.
926 /// An amount of currency specified using ISO 4712.
928 /// The currency that the amount is denominated in.
929 iso4217_code: CurrencyCode,
930 /// The amount in the currency unit adjusted by the ISO 4712 exponent (e.g., USD cents).
935 /// An ISO 4712 three-letter currency code (e.g., USD).
936 pub type CurrencyCode = [u8; 3];
938 /// Quantity of items supported by an [`Offer`].
939 #[derive(Clone, Copy, Debug, PartialEq)]
941 /// Up to a specific number of items (inclusive). Use when more than one item can be requested
942 /// but is limited (e.g., because of per customer or inventory limits).
944 /// May be used with `NonZeroU64::new(1)` but prefer to use [`Quantity::One`] if only one item
947 /// One or more items. Use when more than one item can be requested without any limit.
949 /// Only one item. Use when only a single item can be requested.
954 fn to_tlv_record(&self) -> Option<u64> {
956 Quantity::Bounded(n) => Some(n.get()),
957 Quantity::Unbounded => Some(0),
958 Quantity::One => None,
963 /// Valid type range for offer TLV records.
964 pub(super) const OFFER_TYPES: core::ops::Range<u64> = 1..80;
966 /// TLV record type for [`Offer::metadata`].
967 const OFFER_METADATA_TYPE: u64 = 4;
969 /// TLV record type for [`Offer::signing_pubkey`].
970 const OFFER_NODE_ID_TYPE: u64 = 22;
972 tlv_stream!(OfferTlvStream, OfferTlvStreamRef, OFFER_TYPES, {
973 (2, chains: (Vec<ChainHash>, WithoutLength)),
974 (OFFER_METADATA_TYPE, metadata: (Vec<u8>, WithoutLength)),
975 (6, currency: CurrencyCode),
976 (8, amount: (u64, HighZeroBytesDroppedBigSize)),
977 (10, description: (String, WithoutLength)),
978 (12, features: (OfferFeatures, WithoutLength)),
979 (14, absolute_expiry: (u64, HighZeroBytesDroppedBigSize)),
980 (16, paths: (Vec<BlindedPath>, WithoutLength)),
981 (18, issuer: (String, WithoutLength)),
982 (20, quantity_max: (u64, HighZeroBytesDroppedBigSize)),
983 (OFFER_NODE_ID_TYPE, node_id: PublicKey),
986 impl Bech32Encode for Offer {
987 const BECH32_HRP: &'static str = "lno";
990 impl FromStr for Offer {
991 type Err = Bolt12ParseError;
993 fn from_str(s: &str) -> Result<Self, <Self as FromStr>::Err> {
994 Self::from_bech32_str(s)
998 impl TryFrom<Vec<u8>> for Offer {
999 type Error = Bolt12ParseError;
1001 fn try_from(bytes: Vec<u8>) -> Result<Self, Self::Error> {
1002 let offer = ParsedMessage::<OfferTlvStream>::try_from(bytes)?;
1003 let ParsedMessage { bytes, tlv_stream } = offer;
1004 let contents = OfferContents::try_from(tlv_stream)?;
1005 Ok(Offer { bytes, contents })
1009 impl TryFrom<OfferTlvStream> for OfferContents {
1010 type Error = Bolt12SemanticError;
1012 fn try_from(tlv_stream: OfferTlvStream) -> Result<Self, Self::Error> {
1013 let OfferTlvStream {
1014 chains, metadata, currency, amount, description, features, absolute_expiry, paths,
1015 issuer, quantity_max, node_id,
1018 let metadata = metadata.map(|metadata| Metadata::Bytes(metadata));
1020 let amount = match (currency, amount) {
1021 (None, None) => None,
1022 (None, Some(amount_msats)) if amount_msats > MAX_VALUE_MSAT => {
1023 return Err(Bolt12SemanticError::InvalidAmount);
1025 (None, Some(amount_msats)) => Some(Amount::Bitcoin { amount_msats }),
1026 (Some(_), None) => return Err(Bolt12SemanticError::MissingAmount),
1027 (Some(iso4217_code), Some(amount)) => Some(Amount::Currency { iso4217_code, amount }),
1030 let description = match description {
1031 None => return Err(Bolt12SemanticError::MissingDescription),
1032 Some(description) => description,
1035 let features = features.unwrap_or_else(OfferFeatures::empty);
1037 let absolute_expiry = absolute_expiry
1038 .map(|seconds_from_epoch| Duration::from_secs(seconds_from_epoch));
1040 let supported_quantity = match quantity_max {
1041 None => Quantity::One,
1042 Some(0) => Quantity::Unbounded,
1043 Some(n) => Quantity::Bounded(NonZeroU64::new(n).unwrap()),
1046 let signing_pubkey = match node_id {
1047 None => return Err(Bolt12SemanticError::MissingSigningPubkey),
1048 Some(node_id) => node_id,
1052 chains, metadata, amount, description, features, absolute_expiry, issuer, paths,
1053 supported_quantity, signing_pubkey,
1058 impl core::fmt::Display for Offer {
1059 fn fmt(&self, f: &mut core::fmt::Formatter) -> Result<(), core::fmt::Error> {
1060 self.fmt_bech32_str(f)
1066 use super::{Amount, Offer, OfferTlvStreamRef, Quantity};
1067 #[cfg(not(c_bindings))]
1069 super::OfferBuilder,
1073 super::OfferWithExplicitMetadataBuilder as OfferBuilder,
1076 use bitcoin::blockdata::constants::ChainHash;
1077 use bitcoin::network::constants::Network;
1078 use bitcoin::secp256k1::Secp256k1;
1079 use core::num::NonZeroU64;
1080 use core::time::Duration;
1081 use crate::blinded_path::{BlindedHop, BlindedPath, IntroductionNode};
1082 use crate::sign::KeyMaterial;
1083 use crate::ln::features::OfferFeatures;
1084 use crate::ln::inbound_payment::ExpandedKey;
1085 use crate::ln::msgs::{DecodeError, MAX_VALUE_MSAT};
1086 use crate::offers::parse::{Bolt12ParseError, Bolt12SemanticError};
1087 use crate::offers::test_utils::*;
1088 use crate::util::ser::{BigSize, Writeable};
1089 use crate::util::string::PrintableString;
1092 fn builds_offer_with_defaults() {
1093 let offer = OfferBuilder::new("foo".into(), pubkey(42)).build().unwrap();
1095 let mut buffer = Vec::new();
1096 offer.write(&mut buffer).unwrap();
1098 assert_eq!(offer.bytes, buffer.as_slice());
1099 assert_eq!(offer.chains(), vec![ChainHash::using_genesis_block(Network::Bitcoin)]);
1100 assert!(offer.supports_chain(ChainHash::using_genesis_block(Network::Bitcoin)));
1101 assert_eq!(offer.metadata(), None);
1102 assert_eq!(offer.amount(), None);
1103 assert_eq!(offer.description(), PrintableString("foo"));
1104 assert_eq!(offer.offer_features(), &OfferFeatures::empty());
1105 assert_eq!(offer.absolute_expiry(), None);
1106 #[cfg(feature = "std")]
1107 assert!(!offer.is_expired());
1108 assert_eq!(offer.paths(), &[]);
1109 assert_eq!(offer.issuer(), None);
1110 assert_eq!(offer.supported_quantity(), Quantity::One);
1111 assert_eq!(offer.signing_pubkey(), pubkey(42));
1114 offer.as_tlv_stream(),
1120 description: Some(&String::from("foo")),
1122 absolute_expiry: None,
1126 node_id: Some(&pubkey(42)),
1130 if let Err(e) = Offer::try_from(buffer) {
1131 panic!("error parsing offer: {:?}", e);
1136 fn builds_offer_with_chains() {
1137 let mainnet = ChainHash::using_genesis_block(Network::Bitcoin);
1138 let testnet = ChainHash::using_genesis_block(Network::Testnet);
1140 let offer = OfferBuilder::new("foo".into(), pubkey(42))
1141 .chain(Network::Bitcoin)
1144 assert!(offer.supports_chain(mainnet));
1145 assert_eq!(offer.chains(), vec![mainnet]);
1146 assert_eq!(offer.as_tlv_stream().chains, None);
1148 let offer = OfferBuilder::new("foo".into(), pubkey(42))
1149 .chain(Network::Testnet)
1152 assert!(offer.supports_chain(testnet));
1153 assert_eq!(offer.chains(), vec![testnet]);
1154 assert_eq!(offer.as_tlv_stream().chains, Some(&vec![testnet]));
1156 let offer = OfferBuilder::new("foo".into(), pubkey(42))
1157 .chain(Network::Testnet)
1158 .chain(Network::Testnet)
1161 assert!(offer.supports_chain(testnet));
1162 assert_eq!(offer.chains(), vec![testnet]);
1163 assert_eq!(offer.as_tlv_stream().chains, Some(&vec![testnet]));
1165 let offer = OfferBuilder::new("foo".into(), pubkey(42))
1166 .chain(Network::Bitcoin)
1167 .chain(Network::Testnet)
1170 assert!(offer.supports_chain(mainnet));
1171 assert!(offer.supports_chain(testnet));
1172 assert_eq!(offer.chains(), vec![mainnet, testnet]);
1173 assert_eq!(offer.as_tlv_stream().chains, Some(&vec![mainnet, testnet]));
1177 fn builds_offer_with_metadata() {
1178 let offer = OfferBuilder::new("foo".into(), pubkey(42))
1179 .metadata(vec![42; 32]).unwrap()
1182 assert_eq!(offer.metadata(), Some(&vec![42; 32]));
1183 assert_eq!(offer.as_tlv_stream().metadata, Some(&vec![42; 32]));
1185 let offer = OfferBuilder::new("foo".into(), pubkey(42))
1186 .metadata(vec![42; 32]).unwrap()
1187 .metadata(vec![43; 32]).unwrap()
1190 assert_eq!(offer.metadata(), Some(&vec![43; 32]));
1191 assert_eq!(offer.as_tlv_stream().metadata, Some(&vec![43; 32]));
1195 fn builds_offer_with_metadata_derived() {
1196 let desc = "foo".to_string();
1197 let node_id = recipient_pubkey();
1198 let expanded_key = ExpandedKey::new(&KeyMaterial([42; 32]));
1199 let entropy = FixedEntropy {};
1200 let secp_ctx = Secp256k1::new();
1203 use super::OfferWithDerivedMetadataBuilder as OfferBuilder;
1204 let offer = OfferBuilder
1205 ::deriving_signing_pubkey(desc, node_id, &expanded_key, &entropy, &secp_ctx)
1208 assert_eq!(offer.signing_pubkey(), node_id);
1210 let invoice_request = offer.request_invoice(vec![1; 32], payer_pubkey()).unwrap()
1212 .sign(payer_sign).unwrap();
1213 assert!(invoice_request.verify(&expanded_key, &secp_ctx).is_ok());
1215 // Fails verification with altered offer field
1216 let mut tlv_stream = offer.as_tlv_stream();
1217 tlv_stream.amount = Some(100);
1219 let mut encoded_offer = Vec::new();
1220 tlv_stream.write(&mut encoded_offer).unwrap();
1222 let invoice_request = Offer::try_from(encoded_offer).unwrap()
1223 .request_invoice(vec![1; 32], payer_pubkey()).unwrap()
1225 .sign(payer_sign).unwrap();
1226 assert!(invoice_request.verify(&expanded_key, &secp_ctx).is_err());
1228 // Fails verification with altered metadata
1229 let mut tlv_stream = offer.as_tlv_stream();
1230 let metadata = tlv_stream.metadata.unwrap().iter().copied().rev().collect();
1231 tlv_stream.metadata = Some(&metadata);
1233 let mut encoded_offer = Vec::new();
1234 tlv_stream.write(&mut encoded_offer).unwrap();
1236 let invoice_request = Offer::try_from(encoded_offer).unwrap()
1237 .request_invoice(vec![1; 32], payer_pubkey()).unwrap()
1239 .sign(payer_sign).unwrap();
1240 assert!(invoice_request.verify(&expanded_key, &secp_ctx).is_err());
1244 fn builds_offer_with_derived_signing_pubkey() {
1245 let desc = "foo".to_string();
1246 let node_id = recipient_pubkey();
1247 let expanded_key = ExpandedKey::new(&KeyMaterial([42; 32]));
1248 let entropy = FixedEntropy {};
1249 let secp_ctx = Secp256k1::new();
1251 let blinded_path = BlindedPath {
1252 introduction_node: IntroductionNode::NodeId(pubkey(40)),
1253 blinding_point: pubkey(41),
1255 BlindedHop { blinded_node_id: pubkey(42), encrypted_payload: vec![0; 43] },
1256 BlindedHop { blinded_node_id: node_id, encrypted_payload: vec![0; 44] },
1261 use super::OfferWithDerivedMetadataBuilder as OfferBuilder;
1262 let offer = OfferBuilder
1263 ::deriving_signing_pubkey(desc, node_id, &expanded_key, &entropy, &secp_ctx)
1267 assert_ne!(offer.signing_pubkey(), node_id);
1269 let invoice_request = offer.request_invoice(vec![1; 32], payer_pubkey()).unwrap()
1271 .sign(payer_sign).unwrap();
1272 assert!(invoice_request.verify(&expanded_key, &secp_ctx).is_ok());
1274 // Fails verification with altered offer field
1275 let mut tlv_stream = offer.as_tlv_stream();
1276 tlv_stream.amount = Some(100);
1278 let mut encoded_offer = Vec::new();
1279 tlv_stream.write(&mut encoded_offer).unwrap();
1281 let invoice_request = Offer::try_from(encoded_offer).unwrap()
1282 .request_invoice(vec![1; 32], payer_pubkey()).unwrap()
1284 .sign(payer_sign).unwrap();
1285 assert!(invoice_request.verify(&expanded_key, &secp_ctx).is_err());
1287 // Fails verification with altered signing pubkey
1288 let mut tlv_stream = offer.as_tlv_stream();
1289 let signing_pubkey = pubkey(1);
1290 tlv_stream.node_id = Some(&signing_pubkey);
1292 let mut encoded_offer = Vec::new();
1293 tlv_stream.write(&mut encoded_offer).unwrap();
1295 let invoice_request = Offer::try_from(encoded_offer).unwrap()
1296 .request_invoice(vec![1; 32], payer_pubkey()).unwrap()
1298 .sign(payer_sign).unwrap();
1299 assert!(invoice_request.verify(&expanded_key, &secp_ctx).is_err());
1303 fn builds_offer_with_amount() {
1304 let bitcoin_amount = Amount::Bitcoin { amount_msats: 1000 };
1305 let currency_amount = Amount::Currency { iso4217_code: *b"USD", amount: 10 };
1307 let offer = OfferBuilder::new("foo".into(), pubkey(42))
1311 let tlv_stream = offer.as_tlv_stream();
1312 assert_eq!(offer.amount(), Some(&bitcoin_amount));
1313 assert_eq!(tlv_stream.amount, Some(1000));
1314 assert_eq!(tlv_stream.currency, None);
1316 #[cfg(not(c_bindings))]
1317 let builder = OfferBuilder::new("foo".into(), pubkey(42))
1318 .amount(currency_amount.clone());
1320 let mut builder = OfferBuilder::new("foo".into(), pubkey(42));
1322 builder.amount(currency_amount.clone());
1323 let tlv_stream = builder.offer.as_tlv_stream();
1324 assert_eq!(builder.offer.amount, Some(currency_amount.clone()));
1325 assert_eq!(tlv_stream.amount, Some(10));
1326 assert_eq!(tlv_stream.currency, Some(b"USD"));
1327 match builder.build() {
1328 Ok(_) => panic!("expected error"),
1329 Err(e) => assert_eq!(e, Bolt12SemanticError::UnsupportedCurrency),
1332 let offer = OfferBuilder::new("foo".into(), pubkey(42))
1333 .amount(currency_amount.clone())
1334 .amount(bitcoin_amount.clone())
1337 let tlv_stream = offer.as_tlv_stream();
1338 assert_eq!(tlv_stream.amount, Some(1000));
1339 assert_eq!(tlv_stream.currency, None);
1341 let invalid_amount = Amount::Bitcoin { amount_msats: MAX_VALUE_MSAT + 1 };
1342 match OfferBuilder::new("foo".into(), pubkey(42)).amount(invalid_amount).build() {
1343 Ok(_) => panic!("expected error"),
1344 Err(e) => assert_eq!(e, Bolt12SemanticError::InvalidAmount),
1349 fn builds_offer_with_features() {
1350 let offer = OfferBuilder::new("foo".into(), pubkey(42))
1351 .features_unchecked(OfferFeatures::unknown())
1354 assert_eq!(offer.offer_features(), &OfferFeatures::unknown());
1355 assert_eq!(offer.as_tlv_stream().features, Some(&OfferFeatures::unknown()));
1357 let offer = OfferBuilder::new("foo".into(), pubkey(42))
1358 .features_unchecked(OfferFeatures::unknown())
1359 .features_unchecked(OfferFeatures::empty())
1362 assert_eq!(offer.offer_features(), &OfferFeatures::empty());
1363 assert_eq!(offer.as_tlv_stream().features, None);
1367 fn builds_offer_with_absolute_expiry() {
1368 let future_expiry = Duration::from_secs(u64::max_value());
1369 let past_expiry = Duration::from_secs(0);
1370 let now = future_expiry - Duration::from_secs(1_000);
1372 let offer = OfferBuilder::new("foo".into(), pubkey(42))
1373 .absolute_expiry(future_expiry)
1376 #[cfg(feature = "std")]
1377 assert!(!offer.is_expired());
1378 assert!(!offer.is_expired_no_std(now));
1379 assert_eq!(offer.absolute_expiry(), Some(future_expiry));
1380 assert_eq!(offer.as_tlv_stream().absolute_expiry, Some(future_expiry.as_secs()));
1382 let offer = OfferBuilder::new("foo".into(), pubkey(42))
1383 .absolute_expiry(future_expiry)
1384 .absolute_expiry(past_expiry)
1387 #[cfg(feature = "std")]
1388 assert!(offer.is_expired());
1389 assert!(offer.is_expired_no_std(now));
1390 assert_eq!(offer.absolute_expiry(), Some(past_expiry));
1391 assert_eq!(offer.as_tlv_stream().absolute_expiry, Some(past_expiry.as_secs()));
1395 fn builds_offer_with_paths() {
1398 introduction_node: IntroductionNode::NodeId(pubkey(40)),
1399 blinding_point: pubkey(41),
1401 BlindedHop { blinded_node_id: pubkey(43), encrypted_payload: vec![0; 43] },
1402 BlindedHop { blinded_node_id: pubkey(44), encrypted_payload: vec![0; 44] },
1406 introduction_node: IntroductionNode::NodeId(pubkey(40)),
1407 blinding_point: pubkey(41),
1409 BlindedHop { blinded_node_id: pubkey(45), encrypted_payload: vec![0; 45] },
1410 BlindedHop { blinded_node_id: pubkey(46), encrypted_payload: vec![0; 46] },
1415 let offer = OfferBuilder::new("foo".into(), pubkey(42))
1416 .path(paths[0].clone())
1417 .path(paths[1].clone())
1420 let tlv_stream = offer.as_tlv_stream();
1421 assert_eq!(offer.paths(), paths.as_slice());
1422 assert_eq!(offer.signing_pubkey(), pubkey(42));
1423 assert_ne!(pubkey(42), pubkey(44));
1424 assert_eq!(tlv_stream.paths, Some(&paths));
1425 assert_eq!(tlv_stream.node_id, Some(&pubkey(42)));
1429 fn builds_offer_with_issuer() {
1430 let offer = OfferBuilder::new("foo".into(), pubkey(42))
1431 .issuer("bar".into())
1434 assert_eq!(offer.issuer(), Some(PrintableString("bar")));
1435 assert_eq!(offer.as_tlv_stream().issuer, Some(&String::from("bar")));
1437 let offer = OfferBuilder::new("foo".into(), pubkey(42))
1438 .issuer("bar".into())
1439 .issuer("baz".into())
1442 assert_eq!(offer.issuer(), Some(PrintableString("baz")));
1443 assert_eq!(offer.as_tlv_stream().issuer, Some(&String::from("baz")));
1447 fn builds_offer_with_supported_quantity() {
1448 let one = NonZeroU64::new(1).unwrap();
1449 let ten = NonZeroU64::new(10).unwrap();
1451 let offer = OfferBuilder::new("foo".into(), pubkey(42))
1452 .supported_quantity(Quantity::One)
1455 let tlv_stream = offer.as_tlv_stream();
1456 assert_eq!(offer.supported_quantity(), Quantity::One);
1457 assert_eq!(tlv_stream.quantity_max, None);
1459 let offer = OfferBuilder::new("foo".into(), pubkey(42))
1460 .supported_quantity(Quantity::Unbounded)
1463 let tlv_stream = offer.as_tlv_stream();
1464 assert_eq!(offer.supported_quantity(), Quantity::Unbounded);
1465 assert_eq!(tlv_stream.quantity_max, Some(0));
1467 let offer = OfferBuilder::new("foo".into(), pubkey(42))
1468 .supported_quantity(Quantity::Bounded(ten))
1471 let tlv_stream = offer.as_tlv_stream();
1472 assert_eq!(offer.supported_quantity(), Quantity::Bounded(ten));
1473 assert_eq!(tlv_stream.quantity_max, Some(10));
1475 let offer = OfferBuilder::new("foo".into(), pubkey(42))
1476 .supported_quantity(Quantity::Bounded(one))
1479 let tlv_stream = offer.as_tlv_stream();
1480 assert_eq!(offer.supported_quantity(), Quantity::Bounded(one));
1481 assert_eq!(tlv_stream.quantity_max, Some(1));
1483 let offer = OfferBuilder::new("foo".into(), pubkey(42))
1484 .supported_quantity(Quantity::Bounded(ten))
1485 .supported_quantity(Quantity::One)
1488 let tlv_stream = offer.as_tlv_stream();
1489 assert_eq!(offer.supported_quantity(), Quantity::One);
1490 assert_eq!(tlv_stream.quantity_max, None);
1494 fn fails_requesting_invoice_with_unknown_required_features() {
1495 match OfferBuilder::new("foo".into(), pubkey(42))
1496 .features_unchecked(OfferFeatures::unknown())
1498 .request_invoice(vec![1; 32], pubkey(43))
1500 Ok(_) => panic!("expected error"),
1501 Err(e) => assert_eq!(e, Bolt12SemanticError::UnknownRequiredFeatures),
1506 fn parses_offer_with_chains() {
1507 let offer = OfferBuilder::new("foo".into(), pubkey(42))
1508 .chain(Network::Bitcoin)
1509 .chain(Network::Testnet)
1512 if let Err(e) = offer.to_string().parse::<Offer>() {
1513 panic!("error parsing offer: {:?}", e);
1518 fn parses_offer_with_amount() {
1519 let offer = OfferBuilder::new("foo".into(), pubkey(42))
1520 .amount(Amount::Bitcoin { amount_msats: 1000 })
1523 if let Err(e) = offer.to_string().parse::<Offer>() {
1524 panic!("error parsing offer: {:?}", e);
1527 let mut tlv_stream = offer.as_tlv_stream();
1528 tlv_stream.amount = Some(1000);
1529 tlv_stream.currency = Some(b"USD");
1531 let mut encoded_offer = Vec::new();
1532 tlv_stream.write(&mut encoded_offer).unwrap();
1534 if let Err(e) = Offer::try_from(encoded_offer) {
1535 panic!("error parsing offer: {:?}", e);
1538 let mut tlv_stream = offer.as_tlv_stream();
1539 tlv_stream.amount = None;
1540 tlv_stream.currency = Some(b"USD");
1542 let mut encoded_offer = Vec::new();
1543 tlv_stream.write(&mut encoded_offer).unwrap();
1545 match Offer::try_from(encoded_offer) {
1546 Ok(_) => panic!("expected error"),
1547 Err(e) => assert_eq!(e, Bolt12ParseError::InvalidSemantics(Bolt12SemanticError::MissingAmount)),
1550 let mut tlv_stream = offer.as_tlv_stream();
1551 tlv_stream.amount = Some(MAX_VALUE_MSAT + 1);
1552 tlv_stream.currency = None;
1554 let mut encoded_offer = Vec::new();
1555 tlv_stream.write(&mut encoded_offer).unwrap();
1557 match Offer::try_from(encoded_offer) {
1558 Ok(_) => panic!("expected error"),
1559 Err(e) => assert_eq!(e, Bolt12ParseError::InvalidSemantics(Bolt12SemanticError::InvalidAmount)),
1564 fn parses_offer_with_description() {
1565 let offer = OfferBuilder::new("foo".into(), pubkey(42)).build().unwrap();
1566 if let Err(e) = offer.to_string().parse::<Offer>() {
1567 panic!("error parsing offer: {:?}", e);
1570 let mut tlv_stream = offer.as_tlv_stream();
1571 tlv_stream.description = None;
1573 let mut encoded_offer = Vec::new();
1574 tlv_stream.write(&mut encoded_offer).unwrap();
1576 match Offer::try_from(encoded_offer) {
1577 Ok(_) => panic!("expected error"),
1579 assert_eq!(e, Bolt12ParseError::InvalidSemantics(Bolt12SemanticError::MissingDescription));
1585 fn parses_offer_with_paths() {
1586 let offer = OfferBuilder::new("foo".into(), pubkey(42))
1588 introduction_node: IntroductionNode::NodeId(pubkey(40)),
1589 blinding_point: pubkey(41),
1591 BlindedHop { blinded_node_id: pubkey(43), encrypted_payload: vec![0; 43] },
1592 BlindedHop { blinded_node_id: pubkey(44), encrypted_payload: vec![0; 44] },
1596 introduction_node: IntroductionNode::NodeId(pubkey(40)),
1597 blinding_point: pubkey(41),
1599 BlindedHop { blinded_node_id: pubkey(45), encrypted_payload: vec![0; 45] },
1600 BlindedHop { blinded_node_id: pubkey(46), encrypted_payload: vec![0; 46] },
1605 if let Err(e) = offer.to_string().parse::<Offer>() {
1606 panic!("error parsing offer: {:?}", e);
1609 let mut builder = OfferBuilder::new("foo".into(), pubkey(42));
1610 builder.offer.paths = Some(vec![]);
1612 let offer = builder.build().unwrap();
1613 if let Err(e) = offer.to_string().parse::<Offer>() {
1614 panic!("error parsing offer: {:?}", e);
1619 fn parses_offer_with_quantity() {
1620 let offer = OfferBuilder::new("foo".into(), pubkey(42))
1621 .supported_quantity(Quantity::One)
1624 if let Err(e) = offer.to_string().parse::<Offer>() {
1625 panic!("error parsing offer: {:?}", e);
1628 let offer = OfferBuilder::new("foo".into(), pubkey(42))
1629 .supported_quantity(Quantity::Unbounded)
1632 if let Err(e) = offer.to_string().parse::<Offer>() {
1633 panic!("error parsing offer: {:?}", e);
1636 let offer = OfferBuilder::new("foo".into(), pubkey(42))
1637 .supported_quantity(Quantity::Bounded(NonZeroU64::new(10).unwrap()))
1640 if let Err(e) = offer.to_string().parse::<Offer>() {
1641 panic!("error parsing offer: {:?}", e);
1644 let offer = OfferBuilder::new("foo".into(), pubkey(42))
1645 .supported_quantity(Quantity::Bounded(NonZeroU64::new(1).unwrap()))
1648 if let Err(e) = offer.to_string().parse::<Offer>() {
1649 panic!("error parsing offer: {:?}", e);
1654 fn parses_offer_with_node_id() {
1655 let offer = OfferBuilder::new("foo".into(), pubkey(42)).build().unwrap();
1656 if let Err(e) = offer.to_string().parse::<Offer>() {
1657 panic!("error parsing offer: {:?}", e);
1660 let mut tlv_stream = offer.as_tlv_stream();
1661 tlv_stream.node_id = None;
1663 let mut encoded_offer = Vec::new();
1664 tlv_stream.write(&mut encoded_offer).unwrap();
1666 match Offer::try_from(encoded_offer) {
1667 Ok(_) => panic!("expected error"),
1669 assert_eq!(e, Bolt12ParseError::InvalidSemantics(Bolt12SemanticError::MissingSigningPubkey));
1675 fn fails_parsing_offer_with_extra_tlv_records() {
1676 let offer = OfferBuilder::new("foo".into(), pubkey(42)).build().unwrap();
1678 let mut encoded_offer = Vec::new();
1679 offer.write(&mut encoded_offer).unwrap();
1680 BigSize(80).write(&mut encoded_offer).unwrap();
1681 BigSize(32).write(&mut encoded_offer).unwrap();
1682 [42u8; 32].write(&mut encoded_offer).unwrap();
1684 match Offer::try_from(encoded_offer) {
1685 Ok(_) => panic!("expected error"),
1686 Err(e) => assert_eq!(e, Bolt12ParseError::Decode(DecodeError::InvalidValue)),
1693 use super::{Bolt12ParseError, Bolt12SemanticError, Offer};
1694 use crate::ln::msgs::DecodeError;
1697 fn parses_bech32_encoded_offers() {
1699 // Minimal bolt12 offer
1700 "lno1pgx9getnwss8vetrw3hhyuckyypwa3eyt44h6txtxquqh7lz5djge4afgfjn7k4rgrkuag0jsd5xvxg",
1703 "lno1qgsyxjtl6luzd9t3pr62xr7eemp6awnejusgf6gw45q75vcfqqqqqqq2p32x2um5ypmx2cm5dae8x93pqthvwfzadd7jejes8q9lhc4rvjxd022zv5l44g6qah82ru5rdpnpj",
1705 // for bitcoin (redundant)
1706 "lno1qgsxlc5vp2m0rvmjcxn2y34wv0m5lyc7sdj7zksgn35dvxgqqqqqqqq2p32x2um5ypmx2cm5dae8x93pqthvwfzadd7jejes8q9lhc4rvjxd022zv5l44g6qah82ru5rdpnpj",
1708 // for bitcoin or liquidv1
1709 "lno1qfqpge38tqmzyrdjj3x2qkdr5y80dlfw56ztq6yd9sme995g3gsxqqm0u2xq4dh3kdevrf4zg6hx8a60jv0gxe0ptgyfc6xkryqqqqqqqq9qc4r9wd6zqan9vd6x7unnzcss9mk8y3wkklfvevcrszlmu23kfrxh49px20665dqwmn4p72pksese",
1712 "lno1qsgqqqqqqqqqqqqqqqqqqqqqqqqqqzsv23jhxapqwejkxar0wfe3vggzamrjghtt05kvkvpcp0a79gmy3nt6jsn98ad2xs8de6sl9qmgvcvs",
1715 "lno1pqpzwyq2p32x2um5ypmx2cm5dae8x93pqthvwfzadd7jejes8q9lhc4rvjxd022zv5l44g6qah82ru5rdpnpj",
1718 "lno1qcp4256ypqpzwyq2p32x2um5ypmx2cm5dae8x93pqthvwfzadd7jejes8q9lhc4rvjxd022zv5l44g6qah82ru5rdpnpj",
1721 "lno1pgx9getnwss8vetrw3hhyucwq3ay997czcss9mk8y3wkklfvevcrszlmu23kfrxh49px20665dqwmn4p72pksese",
1724 "lno1pgx9getnwss8vetrw3hhyucjy358garswvaz7tmzdak8gvfj9ehhyeeqgf85c4p3xgsxjmnyw4ehgunfv4e3vggzamrjghtt05kvkvpcp0a79gmy3nt6jsn98ad2xs8de6sl9qmgvcvs",
1727 "lno1pgx9getnwss8vetrw3hhyuc5qyz3vggzamrjghtt05kvkvpcp0a79gmy3nt6jsn98ad2xs8de6sl9qmgvcvs",
1729 // with unlimited (or unknown) quantity
1730 "lno1pgx9getnwss8vetrw3hhyuc5qqtzzqhwcuj966ma9n9nqwqtl032xeyv6755yeflt235pmww58egx6rxry",
1732 // with single quantity (weird but valid)
1733 "lno1pgx9getnwss8vetrw3hhyuc5qyq3vggzamrjghtt05kvkvpcp0a79gmy3nt6jsn98ad2xs8de6sl9qmgvcvs",
1736 "lno1pgx9getnwss8vetrw3hhyucvp5yqqqqqqqqqqqqqqqqqqqqkyypwa3eyt44h6txtxquqh7lz5djge4afgfjn7k4rgrkuag0jsd5xvxg",
1738 // with blinded path via Bob (0x424242...), blinding 020202...
1739 "lno1pgx9getnwss8vetrw3hhyucs5ypjgef743p5fzqq9nqxh0ah7y87rzv3ud0eleps9kl2d5348hq2k8qzqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgqpqqqqqqqqqqqqqqqqqqqqqqqqqqqzqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqqzq3zyg3zyg3zyg3vggzamrjghtt05kvkvpcp0a79gmy3nt6jsn98ad2xs8de6sl9qmgvcvs",
1741 // ... and with second blinded path via Carol (0x434343...), blinding 020202...
1742 "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",
1744 // unknown odd field
1745 "lno1pgx9getnwss8vetrw3hhyuckyypwa3eyt44h6txtxquqh7lz5djge4afgfjn7k4rgrkuag0jsd5xvxfppf5x2mrvdamk7unvvs",
1747 for encoded_offer in &offers {
1748 if let Err(e) = encoded_offer.parse::<Offer>() {
1749 panic!("Invalid offer ({:?}): {}", e, encoded_offer);
1755 fn fails_parsing_bech32_encoded_offers() {
1756 // Malformed: fields out of order
1758 "lno1zcssyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszpgz5znzfgdzs".parse::<Offer>(),
1759 Err(Bolt12ParseError::Decode(DecodeError::InvalidValue)),
1762 // Malformed: unknown even TLV type 78
1764 "lno1pgz5znzfgdz3vggzqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpysgr0u2xq4dh3kdevrf4zg6hx8a60jv0gxe0ptgyfc6xkryqqqqqqqq".parse::<Offer>(),
1765 Err(Bolt12ParseError::Decode(DecodeError::UnknownRequiredFeature)),
1770 "lno1".parse::<Offer>(),
1771 Err(Bolt12ParseError::InvalidSemantics(Bolt12SemanticError::MissingDescription)),
1774 // Malformed: truncated at type
1776 "lno1pg".parse::<Offer>(),
1777 Err(Bolt12ParseError::Decode(DecodeError::ShortRead)),
1780 // Malformed: truncated in length
1782 "lno1pt7s".parse::<Offer>(),
1783 Err(Bolt12ParseError::Decode(DecodeError::ShortRead)),
1786 // Malformed: truncated after length
1788 "lno1pgpq".parse::<Offer>(),
1789 Err(Bolt12ParseError::Decode(DecodeError::ShortRead)),
1792 // Malformed: truncated in description
1794 "lno1pgpyz".parse::<Offer>(),
1795 Err(Bolt12ParseError::Decode(DecodeError::ShortRead)),
1798 // Malformed: invalid offer_chains length
1800 "lno1qgqszzs9g9xyjs69zcssyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqsz".parse::<Offer>(),
1801 Err(Bolt12ParseError::Decode(DecodeError::ShortRead)),
1804 // Malformed: truncated currency UTF-8
1806 "lno1qcqcqzs9g9xyjs69zcssyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqsz".parse::<Offer>(),
1807 Err(Bolt12ParseError::Decode(DecodeError::ShortRead)),
1810 // Malformed: invalid currency UTF-8
1812 "lno1qcpgqsg2q4q5cj2rg5tzzqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqg".parse::<Offer>(),
1813 Err(Bolt12ParseError::Decode(DecodeError::ShortRead)),
1816 // Malformed: truncated description UTF-8
1818 "lno1pgqcq93pqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqy".parse::<Offer>(),
1819 Err(Bolt12ParseError::Decode(DecodeError::InvalidValue)),
1822 // Malformed: invalid description UTF-8
1824 "lno1pgpgqsgkyypqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqs".parse::<Offer>(),
1825 Err(Bolt12ParseError::Decode(DecodeError::InvalidValue)),
1828 // Malformed: truncated offer_paths
1830 "lno1pgz5znzfgdz3qqgpzcssyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqsz".parse::<Offer>(),
1831 Err(Bolt12ParseError::Decode(DecodeError::ShortRead)),
1834 // Malformed: zero num_hops in blinded_path
1836 "lno1pgz5znzfgdz3qqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqsqzcssyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqsz".parse::<Offer>(),
1837 Err(Bolt12ParseError::Decode(DecodeError::ShortRead)),
1840 // Malformed: truncated onionmsg_hop in blinded_path
1842 "lno1pgz5znzfgdz3qqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqspqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqgkyypqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqs".parse::<Offer>(),
1843 Err(Bolt12ParseError::Decode(DecodeError::ShortRead)),
1846 // Malformed: bad first_node_id in blinded_path
1848 "lno1pgz5znzfgdz3qqcrqvpsxqcrqvpsxqcrqvpsxqcrqvpsxqcrqvpsxqcrqvpsxqcrqvpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqspqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqgqzcssyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqsz".parse::<Offer>(),
1849 Err(Bolt12ParseError::Decode(DecodeError::ShortRead)),
1852 // Malformed: bad blinding in blinded_path
1854 "lno1pgz5znzfgdz3qqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpsxqcrqvpsxqcrqvpsxqcrqvpsxqcrqvpsxqcrqvpsxqcrqvpsxqcpqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqgqzcssyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqsz".parse::<Offer>(),
1855 Err(Bolt12ParseError::Decode(DecodeError::ShortRead)),
1858 // Malformed: bad blinded_node_id in onionmsg_hop
1860 "lno1pgz5znzfgdz3qqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqspqvpsxqcrqvpsxqcrqvpsxqcrqvpsxqcrqvpsxqcrqvpsxqcrqvpsxqgqzcssyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqsz".parse::<Offer>(),
1861 Err(Bolt12ParseError::Decode(DecodeError::ShortRead)),
1864 // Malformed: truncated issuer UTF-8
1866 "lno1pgz5znzfgdz3yqvqzcssyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqsz".parse::<Offer>(),
1867 Err(Bolt12ParseError::Decode(DecodeError::InvalidValue)),
1870 // Malformed: invalid issuer UTF-8
1872 "lno1pgz5znzfgdz3yq5qgytzzqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqg".parse::<Offer>(),
1873 Err(Bolt12ParseError::Decode(DecodeError::InvalidValue)),
1876 // Malformed: invalid offer_node_id
1878 "lno1pgz5znzfgdz3vggzqvpsxqcrqvpsxqcrqvpsxqcrqvpsxqcrqvpsxqcrqvpsxqcrqvps".parse::<Offer>(),
1879 Err(Bolt12ParseError::Decode(DecodeError::InvalidValue)),
1882 // Contains type >= 80
1884 "lno1pgz5znzfgdz3vggzqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgp9qgr0u2xq4dh3kdevrf4zg6hx8a60jv0gxe0ptgyfc6xkryqqqqqqqq".parse::<Offer>(),
1885 Err(Bolt12ParseError::Decode(DecodeError::InvalidValue)),
1888 // TODO: Resolved in spec https://github.com/lightning/bolts/pull/798/files#r1334851959
1889 // Contains unknown feature 22
1891 "lno1pgx9getnwss8vetrw3hhyucvqdqqqqqkyypwa3eyt44h6txtxquqh7lz5djge4afgfjn7k4rgrkuag0jsd5xvxg".parse::<Offer>().is_ok()
1894 // Missing offer_description
1896 "lno1zcss9mk8y3wkklfvevcrszlmu23kfrxh49px20665dqwmn4p72pksese".parse::<Offer>(),
1897 Err(Bolt12ParseError::InvalidSemantics(Bolt12SemanticError::MissingDescription)),
1900 // Missing offer_node_id"
1902 "lno1pgx9getnwss8vetrw3hhyuc".parse::<Offer>(),
1903 Err(Bolt12ParseError::InvalidSemantics(Bolt12SemanticError::MissingSigningPubkey)),