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(pubkey)
47 //! .description("coffee, large".to_string())
48 //! .amount_msats(20_000)
49 //! .supported_quantity(Quantity::Unbounded)
50 //! .absolute_expiry(expiration.duration_since(SystemTime::UNIX_EPOCH).unwrap())
51 //! .issuer("Foo Bar".to_string())
52 //! .path(create_blinded_path())
53 //! .path(create_another_blinded_path())
56 //! // Encode as a bech32 string for use in a QR code.
57 //! let encoded_offer = offer.to_string();
59 //! // Parse from a bech32 string after scanning from a QR code.
60 //! let offer = encoded_offer.parse::<Offer>()?;
62 //! // Encode offer as raw bytes.
63 //! let mut bytes = Vec::new();
64 //! offer.write(&mut bytes).unwrap();
66 //! // Decode raw bytes into an offer.
67 //! let offer = Offer::try_from(bytes)?;
74 //! If constructing an [`Offer`] for use with a [`ChannelManager`], use
75 //! [`ChannelManager::create_offer_builder`] instead of [`OfferBuilder::new`].
77 //! [`ChannelManager`]: crate::ln::channelmanager::ChannelManager
78 //! [`ChannelManager::create_offer_builder`]: crate::ln::channelmanager::ChannelManager::create_offer_builder
80 use bitcoin::blockdata::constants::ChainHash;
81 use bitcoin::network::Network;
82 use bitcoin::secp256k1::{Keypair, PublicKey, Secp256k1, self};
83 use core::hash::{Hash, Hasher};
84 use core::num::NonZeroU64;
86 use core::str::FromStr;
87 use core::time::Duration;
88 use crate::sign::EntropySource;
90 use crate::blinded_path::BlindedPath;
91 use crate::ln::channelmanager::PaymentId;
92 use crate::ln::features::OfferFeatures;
93 use crate::ln::inbound_payment::{ExpandedKey, IV_LEN, Nonce};
94 use crate::ln::msgs::{DecodeError, MAX_VALUE_MSAT};
95 use crate::offers::merkle::{TaggedHash, TlvStream};
96 use crate::offers::parse::{Bech32Encode, Bolt12ParseError, Bolt12SemanticError, ParsedMessage};
97 use crate::offers::signer::{Metadata, MetadataMaterial, self};
98 use crate::util::ser::{HighZeroBytesDroppedBigSize, Readable, WithoutLength, Writeable, Writer};
99 use crate::util::string::PrintableString;
101 #[cfg(not(c_bindings))]
103 crate::offers::invoice_request::{DerivedPayerId, ExplicitPayerId, InvoiceRequestBuilder},
107 crate::offers::invoice_request::{InvoiceRequestWithDerivedPayerIdBuilder, InvoiceRequestWithExplicitPayerIdBuilder},
110 #[allow(unused_imports)]
111 use crate::prelude::*;
113 #[cfg(feature = "std")]
114 use std::time::SystemTime;
116 pub(super) const IV_BYTES: &[u8; IV_LEN] = b"LDK Offer ~~~~~~";
118 /// An identifier for an [`Offer`] built using [`DerivedMetadata`].
119 #[derive(Clone, Copy, Debug, Eq, PartialEq)]
120 pub struct OfferId(pub [u8; 32]);
123 const ID_TAG: &'static str = "LDK Offer ID";
125 fn from_valid_offer_tlv_stream(bytes: &[u8]) -> Self {
126 let tagged_hash = TaggedHash::from_valid_tlv_stream_bytes(Self::ID_TAG, bytes);
127 Self(tagged_hash.to_bytes())
130 fn from_valid_invreq_tlv_stream(bytes: &[u8]) -> Self {
131 let tlv_stream = TlvStream::new(bytes).range(OFFER_TYPES);
132 let tagged_hash = TaggedHash::from_tlv_stream(Self::ID_TAG, tlv_stream);
133 Self(tagged_hash.to_bytes())
137 impl Writeable for OfferId {
138 fn write<W: Writer>(&self, w: &mut W) -> Result<(), io::Error> {
143 impl Readable for OfferId {
144 fn read<R: io::Read>(r: &mut R) -> Result<Self, DecodeError> {
145 Ok(OfferId(Readable::read(r)?))
149 /// Builds an [`Offer`] for the "offer to be paid" flow.
151 /// See [module-level documentation] for usage.
153 /// This is not exported to bindings users as builder patterns don't map outside of move semantics.
155 /// [module-level documentation]: self
156 pub struct OfferBuilder<'a, M: MetadataStrategy, T: secp256k1::Signing> {
157 offer: OfferContents,
158 metadata_strategy: core::marker::PhantomData<M>,
159 secp_ctx: Option<&'a Secp256k1<T>>,
162 /// Builds an [`Offer`] for the "offer to be paid" flow.
164 /// See [module-level documentation] for usage.
166 /// [module-level documentation]: self
169 pub struct OfferWithExplicitMetadataBuilder<'a> {
170 offer: OfferContents,
171 metadata_strategy: core::marker::PhantomData<ExplicitMetadata>,
172 secp_ctx: Option<&'a Secp256k1<secp256k1::All>>,
175 /// Builds an [`Offer`] for the "offer to be paid" flow.
177 /// See [module-level documentation] for usage.
179 /// [module-level documentation]: self
182 pub struct OfferWithDerivedMetadataBuilder<'a> {
183 offer: OfferContents,
184 metadata_strategy: core::marker::PhantomData<DerivedMetadata>,
185 secp_ctx: Option<&'a Secp256k1<secp256k1::All>>,
188 /// Indicates how [`Offer::metadata`] may be set.
190 /// This is not exported to bindings users as builder patterns don't map outside of move semantics.
191 pub trait MetadataStrategy {}
193 /// [`Offer::metadata`] may be explicitly set or left empty.
195 /// This is not exported to bindings users as builder patterns don't map outside of move semantics.
196 pub struct ExplicitMetadata {}
198 /// [`Offer::metadata`] will be derived.
200 /// This is not exported to bindings users as builder patterns don't map outside of move semantics.
201 pub struct DerivedMetadata {}
203 impl MetadataStrategy for ExplicitMetadata {}
205 impl MetadataStrategy for DerivedMetadata {}
207 macro_rules! offer_explicit_metadata_builder_methods { (
208 $self: ident, $self_type: ty, $return_type: ty, $return_value: expr
210 /// Creates a new builder for an offer using the [`Offer::signing_pubkey`] for signing invoices.
211 /// The associated secret key must be remembered while the offer is valid.
213 /// Use a different pubkey per offer to avoid correlating offers.
217 /// If constructing an [`Offer`] for use with a [`ChannelManager`], use
218 /// [`ChannelManager::create_offer_builder`] instead of [`OfferBuilder::new`].
220 /// [`ChannelManager`]: crate::ln::channelmanager::ChannelManager
221 /// [`ChannelManager::create_offer_builder`]: crate::ln::channelmanager::ChannelManager::create_offer_builder
222 pub fn new(signing_pubkey: PublicKey) -> Self {
224 offer: OfferContents {
225 chains: None, metadata: None, amount: None, description: None,
226 features: OfferFeatures::empty(), absolute_expiry: None, issuer: None, paths: None,
227 supported_quantity: Quantity::One, signing_pubkey: Some(signing_pubkey),
229 metadata_strategy: core::marker::PhantomData,
234 /// Sets the [`Offer::metadata`] to the given bytes.
236 /// Successive calls to this method will override the previous setting.
237 pub fn metadata(mut $self: $self_type, metadata: Vec<u8>) -> Result<$return_type, Bolt12SemanticError> {
238 $self.offer.metadata = Some(Metadata::Bytes(metadata));
243 macro_rules! offer_derived_metadata_builder_methods { ($secp_context: ty) => {
244 /// Similar to [`OfferBuilder::new`] except, if [`OfferBuilder::path`] is called, the signing
245 /// pubkey is derived from the given [`ExpandedKey`] and [`EntropySource`]. This provides
246 /// recipient privacy by using a different signing pubkey for each offer. Otherwise, the
247 /// provided `node_id` is used for the signing pubkey.
249 /// Also, sets the metadata when [`OfferBuilder::build`] is called such that it can be used by
250 /// [`InvoiceRequest::verify`] to determine if the request was produced for the offer given an
253 /// [`InvoiceRequest::verify`]: crate::offers::invoice_request::InvoiceRequest::verify
254 /// [`ExpandedKey`]: crate::ln::inbound_payment::ExpandedKey
255 pub fn deriving_signing_pubkey<ES: Deref>(
256 node_id: PublicKey, expanded_key: &ExpandedKey, entropy_source: ES,
257 secp_ctx: &'a Secp256k1<$secp_context>
258 ) -> Self where ES::Target: EntropySource {
259 let nonce = Nonce::from_entropy_source(entropy_source);
260 let derivation_material = MetadataMaterial::new(nonce, expanded_key, IV_BYTES, None);
261 let metadata = Metadata::DerivedSigningPubkey(derivation_material);
263 offer: OfferContents {
264 chains: None, metadata: Some(metadata), amount: None, description: None,
265 features: OfferFeatures::empty(), absolute_expiry: None, issuer: None, paths: None,
266 supported_quantity: Quantity::One, signing_pubkey: Some(node_id),
268 metadata_strategy: core::marker::PhantomData,
269 secp_ctx: Some(secp_ctx),
274 macro_rules! offer_builder_methods { (
275 $self: ident, $self_type: ty, $return_type: ty, $return_value: expr $(, $self_mut: tt)?
277 /// Adds the chain hash of the given [`Network`] to [`Offer::chains`]. If not called,
278 /// the chain hash of [`Network::Bitcoin`] is assumed to be the only one supported.
280 /// See [`Offer::chains`] on how this relates to the payment currency.
282 /// Successive calls to this method will add another chain hash.
283 pub fn chain($self: $self_type, network: Network) -> $return_type {
284 $self.chain_hash(ChainHash::using_genesis_block(network))
287 /// Adds the [`ChainHash`] to [`Offer::chains`]. If not called, the chain hash of
288 /// [`Network::Bitcoin`] is assumed to be the only one supported.
290 /// See [`Offer::chains`] on how this relates to the payment currency.
292 /// Successive calls to this method will add another chain hash.
293 pub(crate) fn chain_hash($($self_mut)* $self: $self_type, chain: ChainHash) -> $return_type {
294 let chains = $self.offer.chains.get_or_insert_with(Vec::new);
295 if !chains.contains(&chain) {
302 /// Sets the [`Offer::amount`] as an [`Amount::Bitcoin`].
304 /// Successive calls to this method will override the previous setting.
305 pub fn amount_msats($self: $self_type, amount_msats: u64) -> $return_type {
306 $self.amount(Amount::Bitcoin { amount_msats })
309 /// Sets the [`Offer::amount`].
311 /// Successive calls to this method will override the previous setting.
312 pub(super) fn amount($($self_mut)* $self: $self_type, amount: Amount) -> $return_type {
313 $self.offer.amount = Some(amount);
317 /// Sets the [`Offer::absolute_expiry`] as seconds since the Unix epoch. Any expiry that has
318 /// already passed is valid and can be checked for using [`Offer::is_expired`].
320 /// Successive calls to this method will override the previous setting.
321 pub fn absolute_expiry($($self_mut)* $self: $self_type, absolute_expiry: Duration) -> $return_type {
322 $self.offer.absolute_expiry = Some(absolute_expiry);
326 /// Sets the [`Offer::description`].
328 /// Successive calls to this method will override the previous setting.
329 pub fn description($($self_mut)* $self: $self_type, description: String) -> $return_type {
330 $self.offer.description = Some(description);
334 /// Sets the [`Offer::issuer`].
336 /// Successive calls to this method will override the previous setting.
337 pub fn issuer($($self_mut)* $self: $self_type, issuer: String) -> $return_type {
338 $self.offer.issuer = Some(issuer);
342 /// Adds a blinded path to [`Offer::paths`]. Must include at least one path if only connected by
343 /// private channels or if [`Offer::signing_pubkey`] is not a public node id.
345 /// Successive calls to this method will add another blinded path. Caller is responsible for not
346 /// adding duplicate paths.
347 pub fn path($($self_mut)* $self: $self_type, path: BlindedPath) -> $return_type {
348 $self.offer.paths.get_or_insert_with(Vec::new).push(path);
352 /// Sets the quantity of items for [`Offer::supported_quantity`]. If not called, defaults to
353 /// [`Quantity::One`].
355 /// Successive calls to this method will override the previous setting.
356 pub fn supported_quantity($($self_mut)* $self: $self_type, quantity: Quantity) -> $return_type {
357 $self.offer.supported_quantity = quantity;
361 /// Builds an [`Offer`] from the builder's settings.
362 pub fn build($($self_mut)* $self: $self_type) -> Result<Offer, Bolt12SemanticError> {
363 match $self.offer.amount {
364 Some(Amount::Bitcoin { amount_msats }) => {
365 if amount_msats > MAX_VALUE_MSAT {
366 return Err(Bolt12SemanticError::InvalidAmount);
369 Some(Amount::Currency { .. }) => return Err(Bolt12SemanticError::UnsupportedCurrency),
373 if $self.offer.amount.is_some() && $self.offer.description.is_none() {
374 $self.offer.description = Some(String::new());
377 if let Some(chains) = &$self.offer.chains {
378 if chains.len() == 1 && chains[0] == $self.offer.implied_chain() {
379 $self.offer.chains = None;
383 Ok($self.build_without_checks())
386 fn build_without_checks($($self_mut)* $self: $self_type) -> Offer {
387 // Create the metadata for stateless verification of an InvoiceRequest.
388 if let Some(mut metadata) = $self.offer.metadata.take() {
389 if metadata.has_derivation_material() {
390 if $self.offer.paths.is_none() {
391 metadata = metadata.without_keys();
394 let mut tlv_stream = $self.offer.as_tlv_stream();
395 debug_assert_eq!(tlv_stream.metadata, None);
396 tlv_stream.metadata = None;
397 if metadata.derives_recipient_keys() {
398 tlv_stream.node_id = None;
401 let (derived_metadata, keys) = metadata.derive_from(tlv_stream, $self.secp_ctx);
402 metadata = derived_metadata;
403 if let Some(keys) = keys {
404 $self.offer.signing_pubkey = Some(keys.public_key());
408 $self.offer.metadata = Some(metadata);
411 let mut bytes = Vec::new();
412 $self.offer.write(&mut bytes).unwrap();
414 let id = OfferId::from_valid_offer_tlv_stream(&bytes);
418 #[cfg(not(c_bindings))]
419 contents: $self.offer,
421 contents: $self.offer.clone(),
428 macro_rules! offer_builder_test_methods { (
429 $self: ident, $self_type: ty, $return_type: ty, $return_value: expr $(, $self_mut: tt)?
431 #[cfg_attr(c_bindings, allow(dead_code))]
432 fn features_unchecked($($self_mut)* $self: $self_type, features: OfferFeatures) -> $return_type {
433 $self.offer.features = features;
437 #[cfg_attr(c_bindings, allow(dead_code))]
438 pub(crate) fn clear_chains($($self_mut)* $self: $self_type) -> $return_type {
439 $self.offer.chains = None;
443 #[cfg_attr(c_bindings, allow(dead_code))]
444 pub(crate) fn clear_paths($($self_mut)* $self: $self_type) -> $return_type {
445 $self.offer.paths = None;
449 #[cfg_attr(c_bindings, allow(dead_code))]
450 pub(crate) fn clear_signing_pubkey($($self_mut)* $self: $self_type) -> $return_type {
451 $self.offer.signing_pubkey = None;
455 #[cfg_attr(c_bindings, allow(dead_code))]
456 pub(super) fn build_unchecked($self: $self_type) -> Offer {
457 $self.build_without_checks()
461 impl<'a, M: MetadataStrategy, T: secp256k1::Signing> OfferBuilder<'a, M, T> {
462 offer_builder_methods!(self, Self, Self, self, mut);
465 offer_builder_test_methods!(self, Self, Self, self, mut);
468 impl<'a> OfferBuilder<'a, ExplicitMetadata, secp256k1::SignOnly> {
469 offer_explicit_metadata_builder_methods!(self, Self, Self, self);
472 impl<'a, T: secp256k1::Signing> OfferBuilder<'a, DerivedMetadata, T> {
473 offer_derived_metadata_builder_methods!(T);
476 #[cfg(all(c_bindings, not(test)))]
477 impl<'a> OfferWithExplicitMetadataBuilder<'a> {
478 offer_explicit_metadata_builder_methods!(self, &mut Self, (), ());
479 offer_builder_methods!(self, &mut Self, (), ());
482 #[cfg(all(c_bindings, test))]
483 impl<'a> OfferWithExplicitMetadataBuilder<'a> {
484 offer_explicit_metadata_builder_methods!(self, &mut Self, &mut Self, self);
485 offer_builder_methods!(self, &mut Self, &mut Self, self);
486 offer_builder_test_methods!(self, &mut Self, &mut Self, self);
489 #[cfg(all(c_bindings, not(test)))]
490 impl<'a> OfferWithDerivedMetadataBuilder<'a> {
491 offer_derived_metadata_builder_methods!(secp256k1::All);
492 offer_builder_methods!(self, &mut Self, (), ());
495 #[cfg(all(c_bindings, test))]
496 impl<'a> OfferWithDerivedMetadataBuilder<'a> {
497 offer_derived_metadata_builder_methods!(secp256k1::All);
498 offer_builder_methods!(self, &mut Self, &mut Self, self);
499 offer_builder_test_methods!(self, &mut Self, &mut Self, self);
503 impl<'a> From<OfferBuilder<'a, DerivedMetadata, secp256k1::All>>
504 for OfferWithDerivedMetadataBuilder<'a> {
505 fn from(builder: OfferBuilder<'a, DerivedMetadata, secp256k1::All>) -> Self {
506 let OfferBuilder { offer, metadata_strategy, secp_ctx } = builder;
508 Self { offer, metadata_strategy, secp_ctx }
513 impl<'a> From<OfferWithDerivedMetadataBuilder<'a>>
514 for OfferBuilder<'a, DerivedMetadata, secp256k1::All> {
515 fn from(builder: OfferWithDerivedMetadataBuilder<'a>) -> Self {
516 let OfferWithDerivedMetadataBuilder { offer, metadata_strategy, secp_ctx } = builder;
518 Self { offer, metadata_strategy, secp_ctx }
522 /// An `Offer` is a potentially long-lived proposal for payment of a good or service.
524 /// An offer is a precursor to an [`InvoiceRequest`]. A merchant publishes an offer from which a
525 /// customer may request an [`Bolt12Invoice`] for a specific quantity and using an amount sufficient
526 /// to cover that quantity (i.e., at least `quantity * amount`). See [`Offer::amount`].
528 /// Offers may be denominated in currency other than bitcoin but are ultimately paid using the
531 /// Through the use of [`BlindedPath`]s, offers provide recipient privacy.
533 /// [`InvoiceRequest`]: crate::offers::invoice_request::InvoiceRequest
534 /// [`Bolt12Invoice`]: crate::offers::invoice::Bolt12Invoice
535 #[derive(Clone, Debug)]
537 // The serialized offer. Needed when creating an `InvoiceRequest` if the offer contains unknown
539 pub(super) bytes: Vec<u8>,
540 pub(super) contents: OfferContents,
544 /// The contents of an [`Offer`], which may be shared with an [`InvoiceRequest`] or a
545 /// [`Bolt12Invoice`].
547 /// [`InvoiceRequest`]: crate::offers::invoice_request::InvoiceRequest
548 /// [`Bolt12Invoice`]: crate::offers::invoice::Bolt12Invoice
549 #[derive(Clone, Debug)]
550 #[cfg_attr(test, derive(PartialEq))]
551 pub(super) struct OfferContents {
552 chains: Option<Vec<ChainHash>>,
553 metadata: Option<Metadata>,
554 amount: Option<Amount>,
555 description: Option<String>,
556 features: OfferFeatures,
557 absolute_expiry: Option<Duration>,
558 issuer: Option<String>,
559 paths: Option<Vec<BlindedPath>>,
560 supported_quantity: Quantity,
561 signing_pubkey: Option<PublicKey>,
564 macro_rules! offer_accessors { ($self: ident, $contents: expr) => {
565 // TODO: Return a slice once ChainHash has constants.
566 // - https://github.com/rust-bitcoin/rust-bitcoin/pull/1283
567 // - https://github.com/rust-bitcoin/rust-bitcoin/pull/1286
568 /// The chains that may be used when paying a requested invoice (e.g., bitcoin mainnet).
569 /// Payments must be denominated in units of the minimal lightning-payable unit (e.g., msats)
570 /// for the selected chain.
571 pub fn chains(&$self) -> Vec<bitcoin::blockdata::constants::ChainHash> {
575 // TODO: Link to corresponding method in `InvoiceRequest`.
576 /// Opaque bytes set by the originator. Useful for authentication and validating fields since it
577 /// is reflected in `invoice_request` messages along with all the other fields from the `offer`.
578 pub fn metadata(&$self) -> Option<&Vec<u8>> {
582 /// The minimum amount required for a successful payment of a single item.
583 pub fn amount(&$self) -> Option<$crate::offers::offer::Amount> {
587 /// A complete description of the purpose of the payment. Intended to be displayed to the user
588 /// but with the caveat that it has not been verified in any way.
589 pub fn description(&$self) -> Option<$crate::util::string::PrintableString> {
590 $contents.description()
593 /// Features pertaining to the offer.
594 pub fn offer_features(&$self) -> &$crate::ln::features::OfferFeatures {
595 &$contents.features()
598 /// Duration since the Unix epoch when an invoice should no longer be requested.
600 /// If `None`, the offer does not expire.
601 pub fn absolute_expiry(&$self) -> Option<core::time::Duration> {
602 $contents.absolute_expiry()
605 /// The issuer of the offer, possibly beginning with `user@domain` or `domain`. Intended to be
606 /// displayed to the user but with the caveat that it has not been verified in any way.
607 pub fn issuer(&$self) -> Option<$crate::util::string::PrintableString> {
611 /// Paths to the recipient originating from publicly reachable nodes. Blinded paths provide
612 /// recipient privacy by obfuscating its node id.
613 pub fn paths(&$self) -> &[$crate::blinded_path::BlindedPath] {
617 /// The quantity of items supported.
618 pub fn supported_quantity(&$self) -> $crate::offers::offer::Quantity {
619 $contents.supported_quantity()
622 /// The public key used by the recipient to sign invoices.
623 pub fn signing_pubkey(&$self) -> Option<bitcoin::secp256k1::PublicKey> {
624 $contents.signing_pubkey()
629 offer_accessors!(self, self.contents);
631 /// Returns the id of the offer.
632 pub fn id(&self) -> OfferId {
636 pub(super) fn implied_chain(&self) -> ChainHash {
637 self.contents.implied_chain()
640 /// Returns whether the given chain is supported by the offer.
641 pub fn supports_chain(&self, chain: ChainHash) -> bool {
642 self.contents.supports_chain(chain)
645 /// Whether the offer has expired.
646 #[cfg(feature = "std")]
647 pub fn is_expired(&self) -> bool {
648 self.contents.is_expired()
651 /// Whether the offer has expired given the duration since the Unix epoch.
652 pub fn is_expired_no_std(&self, duration_since_epoch: Duration) -> bool {
653 self.contents.is_expired_no_std(duration_since_epoch)
656 /// Returns whether the given quantity is valid for the offer.
657 pub fn is_valid_quantity(&self, quantity: u64) -> bool {
658 self.contents.is_valid_quantity(quantity)
661 /// Returns whether a quantity is expected in an [`InvoiceRequest`] for the offer.
663 /// [`InvoiceRequest`]: crate::offers::invoice_request::InvoiceRequest
664 pub fn expects_quantity(&self) -> bool {
665 self.contents.expects_quantity()
668 pub(super) fn verify<T: secp256k1::Signing>(
669 &self, key: &ExpandedKey, secp_ctx: &Secp256k1<T>
670 ) -> Result<(OfferId, Option<Keypair>), ()> {
671 self.contents.verify(&self.bytes, key, secp_ctx)
675 macro_rules! request_invoice_derived_payer_id { ($self: ident, $builder: ty) => {
676 /// Similar to [`Offer::request_invoice`] except it:
677 /// - derives the [`InvoiceRequest::payer_id`] such that a different key can be used for each
679 /// - sets [`InvoiceRequest::payer_metadata`] when [`InvoiceRequestBuilder::build`] is called
680 /// such that it can be used by [`Bolt12Invoice::verify`] to determine if the invoice was
681 /// requested using a base [`ExpandedKey`] from which the payer id was derived, and
682 /// - includes the [`PaymentId`] encrypted in [`InvoiceRequest::payer_metadata`] so that it can
683 /// be used when sending the payment for the requested invoice.
685 /// Useful to protect the sender's privacy.
687 /// [`InvoiceRequest::payer_id`]: crate::offers::invoice_request::InvoiceRequest::payer_id
688 /// [`InvoiceRequest::payer_metadata`]: crate::offers::invoice_request::InvoiceRequest::payer_metadata
689 /// [`Bolt12Invoice::verify`]: crate::offers::invoice::Bolt12Invoice::verify
690 /// [`ExpandedKey`]: crate::ln::inbound_payment::ExpandedKey
691 pub fn request_invoice_deriving_payer_id<
693 #[cfg(not(c_bindings))]
694 T: secp256k1::Signing
696 &'a $self, expanded_key: &ExpandedKey, entropy_source: ES,
697 #[cfg(not(c_bindings))]
698 secp_ctx: &'b Secp256k1<T>,
700 secp_ctx: &'b Secp256k1<secp256k1::All>,
701 payment_id: PaymentId
702 ) -> Result<$builder, Bolt12SemanticError>
704 ES::Target: EntropySource,
706 if $self.offer_features().requires_unknown_bits() {
707 return Err(Bolt12SemanticError::UnknownRequiredFeatures);
710 Ok(<$builder>::deriving_payer_id($self, expanded_key, entropy_source, secp_ctx, payment_id))
714 macro_rules! request_invoice_explicit_payer_id { ($self: ident, $builder: ty) => {
715 /// Similar to [`Offer::request_invoice_deriving_payer_id`] except uses `payer_id` for the
716 /// [`InvoiceRequest::payer_id`] instead of deriving a different key for each request.
718 /// Useful for recurring payments using the same `payer_id` with different invoices.
720 /// [`InvoiceRequest::payer_id`]: crate::offers::invoice_request::InvoiceRequest::payer_id
721 pub fn request_invoice_deriving_metadata<ES: Deref>(
722 &$self, payer_id: PublicKey, expanded_key: &ExpandedKey, entropy_source: ES,
723 payment_id: PaymentId
724 ) -> Result<$builder, Bolt12SemanticError>
726 ES::Target: EntropySource,
728 if $self.offer_features().requires_unknown_bits() {
729 return Err(Bolt12SemanticError::UnknownRequiredFeatures);
732 Ok(<$builder>::deriving_metadata($self, payer_id, expanded_key, entropy_source, payment_id))
735 /// Creates an [`InvoiceRequestBuilder`] for the offer with the given `metadata` and `payer_id`,
736 /// which will be reflected in the `Bolt12Invoice` response.
738 /// The `metadata` is useful for including information about the derivation of `payer_id` such
739 /// that invoice response handling can be stateless. Also serves as payer-provided entropy while
740 /// hashing in the signature calculation.
742 /// This should not leak any information such as by using a simple BIP-32 derivation path.
743 /// Otherwise, payments may be correlated.
745 /// Errors if the offer contains unknown required features.
747 /// [`InvoiceRequest`]: crate::offers::invoice_request::InvoiceRequest
748 pub fn request_invoice(
749 &$self, metadata: Vec<u8>, payer_id: PublicKey
750 ) -> Result<$builder, Bolt12SemanticError> {
751 if $self.offer_features().requires_unknown_bits() {
752 return Err(Bolt12SemanticError::UnknownRequiredFeatures);
755 Ok(<$builder>::new($self, metadata, payer_id))
759 #[cfg(not(c_bindings))]
761 request_invoice_derived_payer_id!(self, InvoiceRequestBuilder<'a, 'b, DerivedPayerId, T>);
762 request_invoice_explicit_payer_id!(self, InvoiceRequestBuilder<ExplicitPayerId, secp256k1::SignOnly>);
767 request_invoice_derived_payer_id!(self, InvoiceRequestWithDerivedPayerIdBuilder<'a, 'b>);
768 request_invoice_explicit_payer_id!(self, InvoiceRequestWithExplicitPayerIdBuilder);
773 pub(super) fn as_tlv_stream(&self) -> OfferTlvStreamRef {
774 self.contents.as_tlv_stream()
778 impl AsRef<[u8]> for Offer {
779 fn as_ref(&self) -> &[u8] {
784 impl PartialEq for Offer {
785 fn eq(&self, other: &Self) -> bool {
786 self.bytes.eq(&other.bytes)
792 impl Hash for Offer {
793 fn hash<H: Hasher>(&self, state: &mut H) {
794 self.bytes.hash(state);
799 pub fn chains(&self) -> Vec<ChainHash> {
800 self.chains.as_ref().cloned().unwrap_or_else(|| vec![self.implied_chain()])
803 pub fn implied_chain(&self) -> ChainHash {
804 ChainHash::using_genesis_block(Network::Bitcoin)
807 pub fn supports_chain(&self, chain: ChainHash) -> bool {
808 self.chains().contains(&chain)
811 pub fn metadata(&self) -> Option<&Vec<u8>> {
812 self.metadata.as_ref().and_then(|metadata| metadata.as_bytes())
815 pub fn amount(&self) -> Option<Amount> {
819 pub fn description(&self) -> Option<PrintableString> {
820 self.description.as_ref().map(|description| PrintableString(description))
823 pub fn features(&self) -> &OfferFeatures {
827 pub fn absolute_expiry(&self) -> Option<Duration> {
831 #[cfg(feature = "std")]
832 pub(super) fn is_expired(&self) -> bool {
833 SystemTime::UNIX_EPOCH
835 .map(|duration_since_epoch| self.is_expired_no_std(duration_since_epoch))
839 pub(super) fn is_expired_no_std(&self, duration_since_epoch: Duration) -> bool {
841 .map(|absolute_expiry| duration_since_epoch > absolute_expiry)
845 pub fn issuer(&self) -> Option<PrintableString> {
846 self.issuer.as_ref().map(|issuer| PrintableString(issuer.as_str()))
849 pub fn paths(&self) -> &[BlindedPath] {
850 self.paths.as_ref().map(|paths| paths.as_slice()).unwrap_or(&[])
853 pub(super) fn check_amount_msats_for_quantity(
854 &self, amount_msats: Option<u64>, quantity: Option<u64>
855 ) -> Result<(), Bolt12SemanticError> {
856 let offer_amount_msats = match self.amount {
858 Some(Amount::Bitcoin { amount_msats }) => amount_msats,
859 Some(Amount::Currency { .. }) => return Err(Bolt12SemanticError::UnsupportedCurrency),
862 if !self.expects_quantity() || quantity.is_some() {
863 let expected_amount_msats = offer_amount_msats.checked_mul(quantity.unwrap_or(1))
864 .ok_or(Bolt12SemanticError::InvalidAmount)?;
865 let amount_msats = amount_msats.unwrap_or(expected_amount_msats);
867 if amount_msats < expected_amount_msats {
868 return Err(Bolt12SemanticError::InsufficientAmount);
871 if amount_msats > MAX_VALUE_MSAT {
872 return Err(Bolt12SemanticError::InvalidAmount);
879 pub fn supported_quantity(&self) -> Quantity {
880 self.supported_quantity
883 pub(super) fn check_quantity(&self, quantity: Option<u64>) -> Result<(), Bolt12SemanticError> {
884 let expects_quantity = self.expects_quantity();
886 None if expects_quantity => Err(Bolt12SemanticError::MissingQuantity),
887 Some(_) if !expects_quantity => Err(Bolt12SemanticError::UnexpectedQuantity),
888 Some(quantity) if !self.is_valid_quantity(quantity) => {
889 Err(Bolt12SemanticError::InvalidQuantity)
895 fn is_valid_quantity(&self, quantity: u64) -> bool {
896 match self.supported_quantity {
897 Quantity::Bounded(n) => quantity <= n.get(),
898 Quantity::Unbounded => quantity > 0,
899 Quantity::One => quantity == 1,
903 fn expects_quantity(&self) -> bool {
904 match self.supported_quantity {
905 Quantity::Bounded(_) => true,
906 Quantity::Unbounded => true,
907 Quantity::One => false,
911 pub(super) fn signing_pubkey(&self) -> Option<PublicKey> {
915 /// Verifies that the offer metadata was produced from the offer in the TLV stream.
916 pub(super) fn verify<T: secp256k1::Signing>(
917 &self, bytes: &[u8], key: &ExpandedKey, secp_ctx: &Secp256k1<T>
918 ) -> Result<(OfferId, Option<Keypair>), ()> {
919 match self.metadata() {
921 let tlv_stream = TlvStream::new(bytes).range(OFFER_TYPES).filter(|record| {
922 match record.r#type {
923 OFFER_METADATA_TYPE => false,
924 OFFER_NODE_ID_TYPE => {
925 !self.metadata.as_ref().unwrap().derives_recipient_keys()
930 let signing_pubkey = match self.signing_pubkey() {
931 Some(signing_pubkey) => signing_pubkey,
932 None => return Err(()),
934 let keys = signer::verify_recipient_metadata(
935 metadata, key, IV_BYTES, signing_pubkey, tlv_stream, secp_ctx
938 let offer_id = OfferId::from_valid_invreq_tlv_stream(bytes);
946 pub(super) fn as_tlv_stream(&self) -> OfferTlvStreamRef {
947 let (currency, amount) = match &self.amount {
948 None => (None, None),
949 Some(Amount::Bitcoin { amount_msats }) => (None, Some(*amount_msats)),
950 Some(Amount::Currency { iso4217_code, amount }) => (
951 Some(iso4217_code), Some(*amount)
956 if self.features == OfferFeatures::empty() { None } else { Some(&self.features) }
960 chains: self.chains.as_ref(),
961 metadata: self.metadata(),
964 description: self.description.as_ref(),
966 absolute_expiry: self.absolute_expiry.map(|duration| duration.as_secs()),
967 paths: self.paths.as_ref(),
968 issuer: self.issuer.as_ref(),
969 quantity_max: self.supported_quantity.to_tlv_record(),
970 node_id: self.signing_pubkey.as_ref(),
975 impl Readable for Offer {
976 fn read<R: io::Read>(reader: &mut R) -> Result<Self, DecodeError> {
977 let bytes: WithoutLength<Vec<u8>> = Readable::read(reader)?;
978 Self::try_from(bytes.0).map_err(|_| DecodeError::InvalidValue)
982 impl Writeable for Offer {
983 fn write<W: Writer>(&self, writer: &mut W) -> Result<(), io::Error> {
984 WithoutLength(&self.bytes).write(writer)
988 impl Writeable for OfferContents {
989 fn write<W: Writer>(&self, writer: &mut W) -> Result<(), io::Error> {
990 self.as_tlv_stream().write(writer)
994 /// The minimum amount required for an item in an [`Offer`], denominated in either bitcoin or
995 /// another currency.
996 #[derive(Clone, Copy, Debug, PartialEq)]
998 /// An amount of bitcoin.
1000 /// The amount in millisatoshi.
1003 /// An amount of currency specified using ISO 4712.
1005 /// The currency that the amount is denominated in.
1006 iso4217_code: CurrencyCode,
1007 /// The amount in the currency unit adjusted by the ISO 4712 exponent (e.g., USD cents).
1012 /// An ISO 4712 three-letter currency code (e.g., USD).
1013 pub type CurrencyCode = [u8; 3];
1015 /// Quantity of items supported by an [`Offer`].
1016 #[derive(Clone, Copy, Debug, PartialEq)]
1018 /// Up to a specific number of items (inclusive). Use when more than one item can be requested
1019 /// but is limited (e.g., because of per customer or inventory limits).
1021 /// May be used with `NonZeroU64::new(1)` but prefer to use [`Quantity::One`] if only one item
1023 Bounded(NonZeroU64),
1024 /// One or more items. Use when more than one item can be requested without any limit.
1026 /// Only one item. Use when only a single item can be requested.
1031 fn to_tlv_record(&self) -> Option<u64> {
1033 Quantity::Bounded(n) => Some(n.get()),
1034 Quantity::Unbounded => Some(0),
1035 Quantity::One => None,
1040 /// Valid type range for offer TLV records.
1041 pub(super) const OFFER_TYPES: core::ops::Range<u64> = 1..80;
1043 /// TLV record type for [`Offer::metadata`].
1044 const OFFER_METADATA_TYPE: u64 = 4;
1046 /// TLV record type for [`Offer::signing_pubkey`].
1047 const OFFER_NODE_ID_TYPE: u64 = 22;
1049 tlv_stream!(OfferTlvStream, OfferTlvStreamRef, OFFER_TYPES, {
1050 (2, chains: (Vec<ChainHash>, WithoutLength)),
1051 (OFFER_METADATA_TYPE, metadata: (Vec<u8>, WithoutLength)),
1052 (6, currency: CurrencyCode),
1053 (8, amount: (u64, HighZeroBytesDroppedBigSize)),
1054 (10, description: (String, WithoutLength)),
1055 (12, features: (OfferFeatures, WithoutLength)),
1056 (14, absolute_expiry: (u64, HighZeroBytesDroppedBigSize)),
1057 (16, paths: (Vec<BlindedPath>, WithoutLength)),
1058 (18, issuer: (String, WithoutLength)),
1059 (20, quantity_max: (u64, HighZeroBytesDroppedBigSize)),
1060 (OFFER_NODE_ID_TYPE, node_id: PublicKey),
1063 impl Bech32Encode for Offer {
1064 const BECH32_HRP: &'static str = "lno";
1067 impl FromStr for Offer {
1068 type Err = Bolt12ParseError;
1070 fn from_str(s: &str) -> Result<Self, <Self as FromStr>::Err> {
1071 Self::from_bech32_str(s)
1075 impl TryFrom<Vec<u8>> for Offer {
1076 type Error = Bolt12ParseError;
1078 fn try_from(bytes: Vec<u8>) -> Result<Self, Self::Error> {
1079 let offer = ParsedMessage::<OfferTlvStream>::try_from(bytes)?;
1080 let ParsedMessage { bytes, tlv_stream } = offer;
1081 let contents = OfferContents::try_from(tlv_stream)?;
1082 let id = OfferId::from_valid_offer_tlv_stream(&bytes);
1084 Ok(Offer { bytes, contents, id })
1088 impl TryFrom<OfferTlvStream> for OfferContents {
1089 type Error = Bolt12SemanticError;
1091 fn try_from(tlv_stream: OfferTlvStream) -> Result<Self, Self::Error> {
1092 let OfferTlvStream {
1093 chains, metadata, currency, amount, description, features, absolute_expiry, paths,
1094 issuer, quantity_max, node_id,
1097 let metadata = metadata.map(|metadata| Metadata::Bytes(metadata));
1099 let amount = match (currency, amount) {
1100 (None, None) => None,
1101 (None, Some(amount_msats)) if amount_msats > MAX_VALUE_MSAT => {
1102 return Err(Bolt12SemanticError::InvalidAmount);
1104 (None, Some(amount_msats)) => Some(Amount::Bitcoin { amount_msats }),
1105 (Some(_), None) => return Err(Bolt12SemanticError::MissingAmount),
1106 (Some(iso4217_code), Some(amount)) => Some(Amount::Currency { iso4217_code, amount }),
1109 if amount.is_some() && description.is_none() {
1110 return Err(Bolt12SemanticError::MissingDescription);
1113 let features = features.unwrap_or_else(OfferFeatures::empty);
1115 let absolute_expiry = absolute_expiry
1116 .map(|seconds_from_epoch| Duration::from_secs(seconds_from_epoch));
1118 let supported_quantity = match quantity_max {
1119 None => Quantity::One,
1120 Some(0) => Quantity::Unbounded,
1121 Some(n) => Quantity::Bounded(NonZeroU64::new(n).unwrap()),
1124 let (signing_pubkey, paths) = match (node_id, paths) {
1125 (None, None) => return Err(Bolt12SemanticError::MissingSigningPubkey),
1126 (_, Some(paths)) if paths.is_empty() => return Err(Bolt12SemanticError::MissingPaths),
1127 (node_id, paths) => (node_id, paths),
1131 chains, metadata, amount, description, features, absolute_expiry, issuer, paths,
1132 supported_quantity, signing_pubkey,
1137 impl core::fmt::Display for Offer {
1138 fn fmt(&self, f: &mut core::fmt::Formatter) -> Result<(), core::fmt::Error> {
1139 self.fmt_bech32_str(f)
1145 use super::{Amount, Offer, OfferTlvStreamRef, Quantity};
1146 #[cfg(not(c_bindings))]
1148 super::OfferBuilder,
1152 super::OfferWithExplicitMetadataBuilder as OfferBuilder,
1155 use bitcoin::blockdata::constants::ChainHash;
1156 use bitcoin::network::Network;
1157 use bitcoin::secp256k1::Secp256k1;
1158 use core::num::NonZeroU64;
1159 use core::time::Duration;
1160 use crate::blinded_path::{BlindedHop, BlindedPath, IntroductionNode};
1161 use crate::sign::KeyMaterial;
1162 use crate::ln::features::OfferFeatures;
1163 use crate::ln::inbound_payment::ExpandedKey;
1164 use crate::ln::msgs::{DecodeError, MAX_VALUE_MSAT};
1165 use crate::offers::parse::{Bolt12ParseError, Bolt12SemanticError};
1166 use crate::offers::test_utils::*;
1167 use crate::util::ser::{BigSize, Writeable};
1168 use crate::util::string::PrintableString;
1171 fn builds_offer_with_defaults() {
1172 let offer = OfferBuilder::new(pubkey(42)).build().unwrap();
1174 let mut buffer = Vec::new();
1175 offer.write(&mut buffer).unwrap();
1177 assert_eq!(offer.bytes, buffer.as_slice());
1178 assert_eq!(offer.chains(), vec![ChainHash::using_genesis_block(Network::Bitcoin)]);
1179 assert!(offer.supports_chain(ChainHash::using_genesis_block(Network::Bitcoin)));
1180 assert_eq!(offer.metadata(), None);
1181 assert_eq!(offer.amount(), None);
1182 assert_eq!(offer.description(), None);
1183 assert_eq!(offer.offer_features(), &OfferFeatures::empty());
1184 assert_eq!(offer.absolute_expiry(), None);
1185 #[cfg(feature = "std")]
1186 assert!(!offer.is_expired());
1187 assert_eq!(offer.paths(), &[]);
1188 assert_eq!(offer.issuer(), None);
1189 assert_eq!(offer.supported_quantity(), Quantity::One);
1190 assert!(!offer.expects_quantity());
1191 assert_eq!(offer.signing_pubkey(), Some(pubkey(42)));
1194 offer.as_tlv_stream(),
1202 absolute_expiry: None,
1206 node_id: Some(&pubkey(42)),
1210 if let Err(e) = Offer::try_from(buffer) {
1211 panic!("error parsing offer: {:?}", e);
1216 fn builds_offer_with_chains() {
1217 let mainnet = ChainHash::using_genesis_block(Network::Bitcoin);
1218 let testnet = ChainHash::using_genesis_block(Network::Testnet);
1220 let offer = OfferBuilder::new(pubkey(42))
1221 .chain(Network::Bitcoin)
1224 assert!(offer.supports_chain(mainnet));
1225 assert_eq!(offer.chains(), vec![mainnet]);
1226 assert_eq!(offer.as_tlv_stream().chains, None);
1228 let offer = OfferBuilder::new(pubkey(42))
1229 .chain(Network::Testnet)
1232 assert!(offer.supports_chain(testnet));
1233 assert_eq!(offer.chains(), vec![testnet]);
1234 assert_eq!(offer.as_tlv_stream().chains, Some(&vec![testnet]));
1236 let offer = OfferBuilder::new(pubkey(42))
1237 .chain(Network::Testnet)
1238 .chain(Network::Testnet)
1241 assert!(offer.supports_chain(testnet));
1242 assert_eq!(offer.chains(), vec![testnet]);
1243 assert_eq!(offer.as_tlv_stream().chains, Some(&vec![testnet]));
1245 let offer = OfferBuilder::new(pubkey(42))
1246 .chain(Network::Bitcoin)
1247 .chain(Network::Testnet)
1250 assert!(offer.supports_chain(mainnet));
1251 assert!(offer.supports_chain(testnet));
1252 assert_eq!(offer.chains(), vec![mainnet, testnet]);
1253 assert_eq!(offer.as_tlv_stream().chains, Some(&vec![mainnet, testnet]));
1257 fn builds_offer_with_metadata() {
1258 let offer = OfferBuilder::new(pubkey(42))
1259 .metadata(vec![42; 32]).unwrap()
1262 assert_eq!(offer.metadata(), Some(&vec![42; 32]));
1263 assert_eq!(offer.as_tlv_stream().metadata, Some(&vec![42; 32]));
1265 let offer = OfferBuilder::new(pubkey(42))
1266 .metadata(vec![42; 32]).unwrap()
1267 .metadata(vec![43; 32]).unwrap()
1270 assert_eq!(offer.metadata(), Some(&vec![43; 32]));
1271 assert_eq!(offer.as_tlv_stream().metadata, Some(&vec![43; 32]));
1275 fn builds_offer_with_metadata_derived() {
1276 let node_id = recipient_pubkey();
1277 let expanded_key = ExpandedKey::new(&KeyMaterial([42; 32]));
1278 let entropy = FixedEntropy {};
1279 let secp_ctx = Secp256k1::new();
1282 use super::OfferWithDerivedMetadataBuilder as OfferBuilder;
1283 let offer = OfferBuilder
1284 ::deriving_signing_pubkey(node_id, &expanded_key, &entropy, &secp_ctx)
1287 assert_eq!(offer.signing_pubkey(), Some(node_id));
1289 let invoice_request = offer.request_invoice(vec![1; 32], payer_pubkey()).unwrap()
1291 .sign(payer_sign).unwrap();
1292 match invoice_request.verify(&expanded_key, &secp_ctx) {
1293 Ok(invoice_request) => assert_eq!(invoice_request.offer_id, offer.id()),
1294 Err(_) => panic!("unexpected error"),
1297 // Fails verification with altered offer field
1298 let mut tlv_stream = offer.as_tlv_stream();
1299 tlv_stream.amount = Some(100);
1301 let mut encoded_offer = Vec::new();
1302 tlv_stream.write(&mut encoded_offer).unwrap();
1304 let invoice_request = Offer::try_from(encoded_offer).unwrap()
1305 .request_invoice(vec![1; 32], payer_pubkey()).unwrap()
1307 .sign(payer_sign).unwrap();
1308 assert!(invoice_request.verify(&expanded_key, &secp_ctx).is_err());
1310 // Fails verification with altered metadata
1311 let mut tlv_stream = offer.as_tlv_stream();
1312 let metadata = tlv_stream.metadata.unwrap().iter().copied().rev().collect();
1313 tlv_stream.metadata = Some(&metadata);
1315 let mut encoded_offer = Vec::new();
1316 tlv_stream.write(&mut encoded_offer).unwrap();
1318 let invoice_request = Offer::try_from(encoded_offer).unwrap()
1319 .request_invoice(vec![1; 32], payer_pubkey()).unwrap()
1321 .sign(payer_sign).unwrap();
1322 assert!(invoice_request.verify(&expanded_key, &secp_ctx).is_err());
1326 fn builds_offer_with_derived_signing_pubkey() {
1327 let node_id = recipient_pubkey();
1328 let expanded_key = ExpandedKey::new(&KeyMaterial([42; 32]));
1329 let entropy = FixedEntropy {};
1330 let secp_ctx = Secp256k1::new();
1332 let blinded_path = BlindedPath {
1333 introduction_node: IntroductionNode::NodeId(pubkey(40)),
1334 blinding_point: pubkey(41),
1336 BlindedHop { blinded_node_id: pubkey(42), encrypted_payload: vec![0; 43] },
1337 BlindedHop { blinded_node_id: node_id, encrypted_payload: vec![0; 44] },
1342 use super::OfferWithDerivedMetadataBuilder as OfferBuilder;
1343 let offer = OfferBuilder
1344 ::deriving_signing_pubkey(node_id, &expanded_key, &entropy, &secp_ctx)
1348 assert_ne!(offer.signing_pubkey(), Some(node_id));
1350 let invoice_request = offer.request_invoice(vec![1; 32], payer_pubkey()).unwrap()
1352 .sign(payer_sign).unwrap();
1353 match invoice_request.verify(&expanded_key, &secp_ctx) {
1354 Ok(invoice_request) => assert_eq!(invoice_request.offer_id, offer.id()),
1355 Err(_) => panic!("unexpected error"),
1358 // Fails verification with altered offer field
1359 let mut tlv_stream = offer.as_tlv_stream();
1360 tlv_stream.amount = Some(100);
1362 let mut encoded_offer = Vec::new();
1363 tlv_stream.write(&mut encoded_offer).unwrap();
1365 let invoice_request = Offer::try_from(encoded_offer).unwrap()
1366 .request_invoice(vec![1; 32], payer_pubkey()).unwrap()
1368 .sign(payer_sign).unwrap();
1369 assert!(invoice_request.verify(&expanded_key, &secp_ctx).is_err());
1371 // Fails verification with altered signing pubkey
1372 let mut tlv_stream = offer.as_tlv_stream();
1373 let signing_pubkey = pubkey(1);
1374 tlv_stream.node_id = Some(&signing_pubkey);
1376 let mut encoded_offer = Vec::new();
1377 tlv_stream.write(&mut encoded_offer).unwrap();
1379 let invoice_request = Offer::try_from(encoded_offer).unwrap()
1380 .request_invoice(vec![1; 32], payer_pubkey()).unwrap()
1382 .sign(payer_sign).unwrap();
1383 assert!(invoice_request.verify(&expanded_key, &secp_ctx).is_err());
1387 fn builds_offer_with_amount() {
1388 let bitcoin_amount = Amount::Bitcoin { amount_msats: 1000 };
1389 let currency_amount = Amount::Currency { iso4217_code: *b"USD", amount: 10 };
1391 let offer = OfferBuilder::new(pubkey(42))
1395 let tlv_stream = offer.as_tlv_stream();
1396 assert_eq!(offer.amount(), Some(bitcoin_amount));
1397 assert_eq!(tlv_stream.amount, Some(1000));
1398 assert_eq!(tlv_stream.currency, None);
1400 #[cfg(not(c_bindings))]
1401 let builder = OfferBuilder::new(pubkey(42))
1402 .amount(currency_amount.clone());
1404 let mut builder = OfferBuilder::new(pubkey(42));
1406 builder.amount(currency_amount.clone());
1407 let tlv_stream = builder.offer.as_tlv_stream();
1408 assert_eq!(builder.offer.amount, Some(currency_amount.clone()));
1409 assert_eq!(tlv_stream.amount, Some(10));
1410 assert_eq!(tlv_stream.currency, Some(b"USD"));
1411 match builder.build() {
1412 Ok(_) => panic!("expected error"),
1413 Err(e) => assert_eq!(e, Bolt12SemanticError::UnsupportedCurrency),
1416 let offer = OfferBuilder::new(pubkey(42))
1417 .amount(currency_amount.clone())
1418 .amount(bitcoin_amount.clone())
1421 let tlv_stream = offer.as_tlv_stream();
1422 assert_eq!(tlv_stream.amount, Some(1000));
1423 assert_eq!(tlv_stream.currency, None);
1425 let invalid_amount = Amount::Bitcoin { amount_msats: MAX_VALUE_MSAT + 1 };
1426 match OfferBuilder::new(pubkey(42)).amount(invalid_amount).build() {
1427 Ok(_) => panic!("expected error"),
1428 Err(e) => assert_eq!(e, Bolt12SemanticError::InvalidAmount),
1433 fn builds_offer_with_description() {
1434 let offer = OfferBuilder::new(pubkey(42))
1435 .description("foo".into())
1438 assert_eq!(offer.description(), Some(PrintableString("foo")));
1439 assert_eq!(offer.as_tlv_stream().description, Some(&String::from("foo")));
1441 let offer = OfferBuilder::new(pubkey(42))
1442 .description("foo".into())
1443 .description("bar".into())
1446 assert_eq!(offer.description(), Some(PrintableString("bar")));
1447 assert_eq!(offer.as_tlv_stream().description, Some(&String::from("bar")));
1449 let offer = OfferBuilder::new(pubkey(42))
1453 assert_eq!(offer.description(), Some(PrintableString("")));
1454 assert_eq!(offer.as_tlv_stream().description, Some(&String::from("")));
1458 fn builds_offer_with_features() {
1459 let offer = OfferBuilder::new(pubkey(42))
1460 .features_unchecked(OfferFeatures::unknown())
1463 assert_eq!(offer.offer_features(), &OfferFeatures::unknown());
1464 assert_eq!(offer.as_tlv_stream().features, Some(&OfferFeatures::unknown()));
1466 let offer = OfferBuilder::new(pubkey(42))
1467 .features_unchecked(OfferFeatures::unknown())
1468 .features_unchecked(OfferFeatures::empty())
1471 assert_eq!(offer.offer_features(), &OfferFeatures::empty());
1472 assert_eq!(offer.as_tlv_stream().features, None);
1476 fn builds_offer_with_absolute_expiry() {
1477 let future_expiry = Duration::from_secs(u64::max_value());
1478 let past_expiry = Duration::from_secs(0);
1479 let now = future_expiry - Duration::from_secs(1_000);
1481 let offer = OfferBuilder::new(pubkey(42))
1482 .absolute_expiry(future_expiry)
1485 #[cfg(feature = "std")]
1486 assert!(!offer.is_expired());
1487 assert!(!offer.is_expired_no_std(now));
1488 assert_eq!(offer.absolute_expiry(), Some(future_expiry));
1489 assert_eq!(offer.as_tlv_stream().absolute_expiry, Some(future_expiry.as_secs()));
1491 let offer = OfferBuilder::new(pubkey(42))
1492 .absolute_expiry(future_expiry)
1493 .absolute_expiry(past_expiry)
1496 #[cfg(feature = "std")]
1497 assert!(offer.is_expired());
1498 assert!(offer.is_expired_no_std(now));
1499 assert_eq!(offer.absolute_expiry(), Some(past_expiry));
1500 assert_eq!(offer.as_tlv_stream().absolute_expiry, Some(past_expiry.as_secs()));
1504 fn builds_offer_with_paths() {
1507 introduction_node: IntroductionNode::NodeId(pubkey(40)),
1508 blinding_point: pubkey(41),
1510 BlindedHop { blinded_node_id: pubkey(43), encrypted_payload: vec![0; 43] },
1511 BlindedHop { blinded_node_id: pubkey(44), encrypted_payload: vec![0; 44] },
1515 introduction_node: IntroductionNode::NodeId(pubkey(40)),
1516 blinding_point: pubkey(41),
1518 BlindedHop { blinded_node_id: pubkey(45), encrypted_payload: vec![0; 45] },
1519 BlindedHop { blinded_node_id: pubkey(46), encrypted_payload: vec![0; 46] },
1524 let offer = OfferBuilder::new(pubkey(42))
1525 .path(paths[0].clone())
1526 .path(paths[1].clone())
1529 let tlv_stream = offer.as_tlv_stream();
1530 assert_eq!(offer.paths(), paths.as_slice());
1531 assert_eq!(offer.signing_pubkey(), Some(pubkey(42)));
1532 assert_ne!(pubkey(42), pubkey(44));
1533 assert_eq!(tlv_stream.paths, Some(&paths));
1534 assert_eq!(tlv_stream.node_id, Some(&pubkey(42)));
1538 fn builds_offer_with_issuer() {
1539 let offer = OfferBuilder::new(pubkey(42))
1540 .issuer("foo".into())
1543 assert_eq!(offer.issuer(), Some(PrintableString("foo")));
1544 assert_eq!(offer.as_tlv_stream().issuer, Some(&String::from("foo")));
1546 let offer = OfferBuilder::new(pubkey(42))
1547 .issuer("foo".into())
1548 .issuer("bar".into())
1551 assert_eq!(offer.issuer(), Some(PrintableString("bar")));
1552 assert_eq!(offer.as_tlv_stream().issuer, Some(&String::from("bar")));
1556 fn builds_offer_with_supported_quantity() {
1557 let one = NonZeroU64::new(1).unwrap();
1558 let ten = NonZeroU64::new(10).unwrap();
1560 let offer = OfferBuilder::new(pubkey(42))
1561 .supported_quantity(Quantity::One)
1564 let tlv_stream = offer.as_tlv_stream();
1565 assert!(!offer.expects_quantity());
1566 assert_eq!(offer.supported_quantity(), Quantity::One);
1567 assert_eq!(tlv_stream.quantity_max, None);
1569 let offer = OfferBuilder::new(pubkey(42))
1570 .supported_quantity(Quantity::Unbounded)
1573 let tlv_stream = offer.as_tlv_stream();
1574 assert!(offer.expects_quantity());
1575 assert_eq!(offer.supported_quantity(), Quantity::Unbounded);
1576 assert_eq!(tlv_stream.quantity_max, Some(0));
1578 let offer = OfferBuilder::new(pubkey(42))
1579 .supported_quantity(Quantity::Bounded(ten))
1582 let tlv_stream = offer.as_tlv_stream();
1583 assert!(offer.expects_quantity());
1584 assert_eq!(offer.supported_quantity(), Quantity::Bounded(ten));
1585 assert_eq!(tlv_stream.quantity_max, Some(10));
1587 let offer = OfferBuilder::new(pubkey(42))
1588 .supported_quantity(Quantity::Bounded(one))
1591 let tlv_stream = offer.as_tlv_stream();
1592 assert!(offer.expects_quantity());
1593 assert_eq!(offer.supported_quantity(), Quantity::Bounded(one));
1594 assert_eq!(tlv_stream.quantity_max, Some(1));
1596 let offer = OfferBuilder::new(pubkey(42))
1597 .supported_quantity(Quantity::Bounded(ten))
1598 .supported_quantity(Quantity::One)
1601 let tlv_stream = offer.as_tlv_stream();
1602 assert!(!offer.expects_quantity());
1603 assert_eq!(offer.supported_quantity(), Quantity::One);
1604 assert_eq!(tlv_stream.quantity_max, None);
1608 fn fails_requesting_invoice_with_unknown_required_features() {
1609 match OfferBuilder::new(pubkey(42))
1610 .features_unchecked(OfferFeatures::unknown())
1612 .request_invoice(vec![1; 32], pubkey(43))
1614 Ok(_) => panic!("expected error"),
1615 Err(e) => assert_eq!(e, Bolt12SemanticError::UnknownRequiredFeatures),
1620 fn parses_offer_with_chains() {
1621 let offer = OfferBuilder::new(pubkey(42))
1622 .chain(Network::Bitcoin)
1623 .chain(Network::Testnet)
1626 if let Err(e) = offer.to_string().parse::<Offer>() {
1627 panic!("error parsing offer: {:?}", e);
1632 fn parses_offer_with_amount() {
1633 let offer = OfferBuilder::new(pubkey(42))
1634 .amount(Amount::Bitcoin { amount_msats: 1000 })
1637 if let Err(e) = offer.to_string().parse::<Offer>() {
1638 panic!("error parsing offer: {:?}", e);
1641 let mut tlv_stream = offer.as_tlv_stream();
1642 tlv_stream.amount = Some(1000);
1643 tlv_stream.currency = Some(b"USD");
1645 let mut encoded_offer = Vec::new();
1646 tlv_stream.write(&mut encoded_offer).unwrap();
1648 if let Err(e) = Offer::try_from(encoded_offer) {
1649 panic!("error parsing offer: {:?}", e);
1652 let mut tlv_stream = offer.as_tlv_stream();
1653 tlv_stream.amount = None;
1654 tlv_stream.currency = Some(b"USD");
1656 let mut encoded_offer = Vec::new();
1657 tlv_stream.write(&mut encoded_offer).unwrap();
1659 match Offer::try_from(encoded_offer) {
1660 Ok(_) => panic!("expected error"),
1661 Err(e) => assert_eq!(e, Bolt12ParseError::InvalidSemantics(Bolt12SemanticError::MissingAmount)),
1664 let mut tlv_stream = offer.as_tlv_stream();
1665 tlv_stream.amount = Some(MAX_VALUE_MSAT + 1);
1666 tlv_stream.currency = None;
1668 let mut encoded_offer = Vec::new();
1669 tlv_stream.write(&mut encoded_offer).unwrap();
1671 match Offer::try_from(encoded_offer) {
1672 Ok(_) => panic!("expected error"),
1673 Err(e) => assert_eq!(e, Bolt12ParseError::InvalidSemantics(Bolt12SemanticError::InvalidAmount)),
1678 fn parses_offer_with_description() {
1679 let offer = OfferBuilder::new(pubkey(42)).build().unwrap();
1680 if let Err(e) = offer.to_string().parse::<Offer>() {
1681 panic!("error parsing offer: {:?}", e);
1684 let offer = OfferBuilder::new(pubkey(42))
1685 .description("foo".to_string())
1688 if let Err(e) = offer.to_string().parse::<Offer>() {
1689 panic!("error parsing offer: {:?}", e);
1692 let mut tlv_stream = offer.as_tlv_stream();
1693 tlv_stream.description = None;
1695 let mut encoded_offer = Vec::new();
1696 tlv_stream.write(&mut encoded_offer).unwrap();
1698 match Offer::try_from(encoded_offer) {
1699 Ok(_) => panic!("expected error"),
1701 assert_eq!(e, Bolt12ParseError::InvalidSemantics(Bolt12SemanticError::MissingDescription));
1707 fn parses_offer_with_paths() {
1708 let offer = OfferBuilder::new(pubkey(42))
1710 introduction_node: IntroductionNode::NodeId(pubkey(40)),
1711 blinding_point: pubkey(41),
1713 BlindedHop { blinded_node_id: pubkey(43), encrypted_payload: vec![0; 43] },
1714 BlindedHop { blinded_node_id: pubkey(44), encrypted_payload: vec![0; 44] },
1718 introduction_node: IntroductionNode::NodeId(pubkey(40)),
1719 blinding_point: pubkey(41),
1721 BlindedHop { blinded_node_id: pubkey(45), encrypted_payload: vec![0; 45] },
1722 BlindedHop { blinded_node_id: pubkey(46), encrypted_payload: vec![0; 46] },
1727 if let Err(e) = offer.to_string().parse::<Offer>() {
1728 panic!("error parsing offer: {:?}", e);
1731 let offer = OfferBuilder::new(pubkey(42))
1733 introduction_node: IntroductionNode::NodeId(pubkey(40)),
1734 blinding_point: pubkey(41),
1736 BlindedHop { blinded_node_id: pubkey(43), encrypted_payload: vec![0; 43] },
1737 BlindedHop { blinded_node_id: pubkey(44), encrypted_payload: vec![0; 44] },
1740 .clear_signing_pubkey()
1743 if let Err(e) = offer.to_string().parse::<Offer>() {
1744 panic!("error parsing offer: {:?}", e);
1747 let mut builder = OfferBuilder::new(pubkey(42));
1748 builder.offer.paths = Some(vec![]);
1750 let offer = builder.build().unwrap();
1751 match offer.to_string().parse::<Offer>() {
1752 Ok(_) => panic!("expected error"),
1754 assert_eq!(e, Bolt12ParseError::InvalidSemantics(Bolt12SemanticError::MissingPaths));
1760 fn parses_offer_with_quantity() {
1761 let offer = OfferBuilder::new(pubkey(42))
1762 .supported_quantity(Quantity::One)
1765 if let Err(e) = offer.to_string().parse::<Offer>() {
1766 panic!("error parsing offer: {:?}", e);
1769 let offer = OfferBuilder::new(pubkey(42))
1770 .supported_quantity(Quantity::Unbounded)
1773 if let Err(e) = offer.to_string().parse::<Offer>() {
1774 panic!("error parsing offer: {:?}", e);
1777 let offer = OfferBuilder::new(pubkey(42))
1778 .supported_quantity(Quantity::Bounded(NonZeroU64::new(10).unwrap()))
1781 if let Err(e) = offer.to_string().parse::<Offer>() {
1782 panic!("error parsing offer: {:?}", e);
1785 let offer = OfferBuilder::new(pubkey(42))
1786 .supported_quantity(Quantity::Bounded(NonZeroU64::new(1).unwrap()))
1789 if let Err(e) = offer.to_string().parse::<Offer>() {
1790 panic!("error parsing offer: {:?}", e);
1795 fn parses_offer_with_node_id() {
1796 let offer = OfferBuilder::new(pubkey(42)).build().unwrap();
1797 if let Err(e) = offer.to_string().parse::<Offer>() {
1798 panic!("error parsing offer: {:?}", e);
1801 let mut tlv_stream = offer.as_tlv_stream();
1802 tlv_stream.node_id = None;
1804 let mut encoded_offer = Vec::new();
1805 tlv_stream.write(&mut encoded_offer).unwrap();
1807 match Offer::try_from(encoded_offer) {
1808 Ok(_) => panic!("expected error"),
1810 assert_eq!(e, Bolt12ParseError::InvalidSemantics(Bolt12SemanticError::MissingSigningPubkey));
1816 fn fails_parsing_offer_with_extra_tlv_records() {
1817 let offer = OfferBuilder::new(pubkey(42)).build().unwrap();
1819 let mut encoded_offer = Vec::new();
1820 offer.write(&mut encoded_offer).unwrap();
1821 BigSize(80).write(&mut encoded_offer).unwrap();
1822 BigSize(32).write(&mut encoded_offer).unwrap();
1823 [42u8; 32].write(&mut encoded_offer).unwrap();
1825 match Offer::try_from(encoded_offer) {
1826 Ok(_) => panic!("expected error"),
1827 Err(e) => assert_eq!(e, Bolt12ParseError::Decode(DecodeError::InvalidValue)),
1834 use super::{Bolt12ParseError, Bolt12SemanticError, Offer};
1835 use crate::ln::msgs::DecodeError;
1838 fn parses_bech32_encoded_offers() {
1840 // Minimal bolt12 offer
1841 "lno1pgx9getnwss8vetrw3hhyuckyypwa3eyt44h6txtxquqh7lz5djge4afgfjn7k4rgrkuag0jsd5xvxg",
1844 "lno1qgsyxjtl6luzd9t3pr62xr7eemp6awnejusgf6gw45q75vcfqqqqqqq2p32x2um5ypmx2cm5dae8x93pqthvwfzadd7jejes8q9lhc4rvjxd022zv5l44g6qah82ru5rdpnpj",
1846 // for bitcoin (redundant)
1847 "lno1qgsxlc5vp2m0rvmjcxn2y34wv0m5lyc7sdj7zksgn35dvxgqqqqqqqq2p32x2um5ypmx2cm5dae8x93pqthvwfzadd7jejes8q9lhc4rvjxd022zv5l44g6qah82ru5rdpnpj",
1849 // for bitcoin or liquidv1
1850 "lno1qfqpge38tqmzyrdjj3x2qkdr5y80dlfw56ztq6yd9sme995g3gsxqqm0u2xq4dh3kdevrf4zg6hx8a60jv0gxe0ptgyfc6xkryqqqqqqqq9qc4r9wd6zqan9vd6x7unnzcss9mk8y3wkklfvevcrszlmu23kfrxh49px20665dqwmn4p72pksese",
1853 "lno1qsgqqqqqqqqqqqqqqqqqqqqqqqqqqzsv23jhxapqwejkxar0wfe3vggzamrjghtt05kvkvpcp0a79gmy3nt6jsn98ad2xs8de6sl9qmgvcvs",
1856 "lno1pqpzwyq2p32x2um5ypmx2cm5dae8x93pqthvwfzadd7jejes8q9lhc4rvjxd022zv5l44g6qah82ru5rdpnpj",
1859 "lno1qcp4256ypqpzwyq2p32x2um5ypmx2cm5dae8x93pqthvwfzadd7jejes8q9lhc4rvjxd022zv5l44g6qah82ru5rdpnpj",
1862 "lno1pgx9getnwss8vetrw3hhyucwq3ay997czcss9mk8y3wkklfvevcrszlmu23kfrxh49px20665dqwmn4p72pksese",
1865 "lno1pgx9getnwss8vetrw3hhyucjy358garswvaz7tmzdak8gvfj9ehhyeeqgf85c4p3xgsxjmnyw4ehgunfv4e3vggzamrjghtt05kvkvpcp0a79gmy3nt6jsn98ad2xs8de6sl9qmgvcvs",
1868 "lno1pgx9getnwss8vetrw3hhyuc5qyz3vggzamrjghtt05kvkvpcp0a79gmy3nt6jsn98ad2xs8de6sl9qmgvcvs",
1870 // with unlimited (or unknown) quantity
1871 "lno1pgx9getnwss8vetrw3hhyuc5qqtzzqhwcuj966ma9n9nqwqtl032xeyv6755yeflt235pmww58egx6rxry",
1873 // with single quantity (weird but valid)
1874 "lno1pgx9getnwss8vetrw3hhyuc5qyq3vggzamrjghtt05kvkvpcp0a79gmy3nt6jsn98ad2xs8de6sl9qmgvcvs",
1877 "lno1pgx9getnwss8vetrw3hhyucvp5yqqqqqqqqqqqqqqqqqqqqkyypwa3eyt44h6txtxquqh7lz5djge4afgfjn7k4rgrkuag0jsd5xvxg",
1879 // with blinded path via Bob (0x424242...), blinding 020202...
1880 "lno1pgx9getnwss8vetrw3hhyucs5ypjgef743p5fzqq9nqxh0ah7y87rzv3ud0eleps9kl2d5348hq2k8qzqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgqpqqqqqqqqqqqqqqqqqqqqqqqqqqqzqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqqzq3zyg3zyg3zyg3vggzamrjghtt05kvkvpcp0a79gmy3nt6jsn98ad2xs8de6sl9qmgvcvs",
1882 // ... and with sciddir introduction node
1883 "lno1pgx9getnwss8vetrw3hhyucs3yqqqqqqqqqqqqp2qgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqqyqqqqqqqqqqqqqqqqqqqqqqqqqqqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqqgzyg3zyg3zyg3z93pqthvwfzadd7jejes8q9lhc4rvjxd022zv5l44g6qah82ru5rdpnpj",
1885 // ... and with second blinded path via Carol (0x434343...), blinding 020202...
1886 "lno1pgx9getnwss8vetrw3hhyucsl5q5yqeyv5l2cs6y3qqzesrth7mlzrlp3xg7xhulusczm04x6g6nms9trspqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqqsqqqqqqqqqqqqqqqqqqqqqqqqqqpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqsqpqg3zyg3zyg3zygz0uc7h32x9s0aecdhxlk075kn046aafpuuyw8f5j652t3vha2yqrsyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqsqzqqqqqqqqqqqqqqqqqqqqqqqqqqqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqqyzyg3zyg3zyg3zzcss9mk8y3wkklfvevcrszlmu23kfrxh49px20665dqwmn4p72pksese",
1888 // unknown odd field
1889 "lno1pgx9getnwss8vetrw3hhyuckyypwa3eyt44h6txtxquqh7lz5djge4afgfjn7k4rgrkuag0jsd5xvxfppf5x2mrvdamk7unvvs",
1891 for encoded_offer in &offers {
1892 if let Err(e) = encoded_offer.parse::<Offer>() {
1893 panic!("Invalid offer ({:?}): {}", e, encoded_offer);
1899 fn fails_parsing_bech32_encoded_offers() {
1900 // Malformed: fields out of order
1902 "lno1zcssyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszpgz5znzfgdzs".parse::<Offer>(),
1903 Err(Bolt12ParseError::Decode(DecodeError::InvalidValue)),
1906 // Malformed: unknown even TLV type 78
1908 "lno1pgz5znzfgdz3vggzqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpysgr0u2xq4dh3kdevrf4zg6hx8a60jv0gxe0ptgyfc6xkryqqqqqqqq".parse::<Offer>(),
1909 Err(Bolt12ParseError::Decode(DecodeError::UnknownRequiredFeature)),
1914 "lno1".parse::<Offer>(),
1915 Err(Bolt12ParseError::InvalidSemantics(Bolt12SemanticError::MissingSigningPubkey)),
1918 // Malformed: truncated at type
1920 "lno1pg".parse::<Offer>(),
1921 Err(Bolt12ParseError::Decode(DecodeError::ShortRead)),
1924 // Malformed: truncated in length
1926 "lno1pt7s".parse::<Offer>(),
1927 Err(Bolt12ParseError::Decode(DecodeError::ShortRead)),
1930 // Malformed: truncated after length
1932 "lno1pgpq".parse::<Offer>(),
1933 Err(Bolt12ParseError::Decode(DecodeError::ShortRead)),
1936 // Malformed: truncated in description
1938 "lno1pgpyz".parse::<Offer>(),
1939 Err(Bolt12ParseError::Decode(DecodeError::ShortRead)),
1942 // Malformed: invalid offer_chains length
1944 "lno1qgqszzs9g9xyjs69zcssyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqsz".parse::<Offer>(),
1945 Err(Bolt12ParseError::Decode(DecodeError::ShortRead)),
1948 // Malformed: truncated currency UTF-8
1950 "lno1qcqcqzs9g9xyjs69zcssyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqsz".parse::<Offer>(),
1951 Err(Bolt12ParseError::Decode(DecodeError::ShortRead)),
1954 // Malformed: invalid currency UTF-8
1956 "lno1qcpgqsg2q4q5cj2rg5tzzqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqg".parse::<Offer>(),
1957 Err(Bolt12ParseError::Decode(DecodeError::ShortRead)),
1960 // Malformed: truncated description UTF-8
1962 "lno1pgqcq93pqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqy".parse::<Offer>(),
1963 Err(Bolt12ParseError::Decode(DecodeError::InvalidValue)),
1966 // Malformed: invalid description UTF-8
1968 "lno1pgpgqsgkyypqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqs".parse::<Offer>(),
1969 Err(Bolt12ParseError::Decode(DecodeError::InvalidValue)),
1972 // Malformed: truncated offer_paths
1974 "lno1pgz5znzfgdz3qqgpzcssyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqsz".parse::<Offer>(),
1975 Err(Bolt12ParseError::Decode(DecodeError::ShortRead)),
1978 // Malformed: zero num_hops in blinded_path
1980 "lno1pgz5znzfgdz3qqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqsqzcssyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqsz".parse::<Offer>(),
1981 Err(Bolt12ParseError::Decode(DecodeError::ShortRead)),
1984 // Malformed: truncated onionmsg_hop in blinded_path
1986 "lno1pgz5znzfgdz3qqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqspqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqgkyypqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqs".parse::<Offer>(),
1987 Err(Bolt12ParseError::Decode(DecodeError::ShortRead)),
1990 // Malformed: bad first_node_id in blinded_path
1992 "lno1pgz5znzfgdz3qqcrqvpsxqcrqvpsxqcrqvpsxqcrqvpsxqcrqvpsxqcrqvpsxqcrqvpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqspqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqgqzcssyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqsz".parse::<Offer>(),
1993 Err(Bolt12ParseError::Decode(DecodeError::ShortRead)),
1996 // Malformed: bad blinding in blinded_path
1998 "lno1pgz5znzfgdz3qqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpsxqcrqvpsxqcrqvpsxqcrqvpsxqcrqvpsxqcrqvpsxqcrqvpsxqcpqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqgqzcssyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqsz".parse::<Offer>(),
1999 Err(Bolt12ParseError::Decode(DecodeError::ShortRead)),
2002 // Malformed: bad blinded_node_id in onionmsg_hop
2004 "lno1pgz5znzfgdz3qqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqspqvpsxqcrqvpsxqcrqvpsxqcrqvpsxqcrqvpsxqcrqvpsxqcrqvpsxqgqzcssyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqsz".parse::<Offer>(),
2005 Err(Bolt12ParseError::Decode(DecodeError::ShortRead)),
2008 // Malformed: truncated issuer UTF-8
2010 "lno1pgz5znzfgdz3yqvqzcssyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqsz".parse::<Offer>(),
2011 Err(Bolt12ParseError::Decode(DecodeError::InvalidValue)),
2014 // Malformed: invalid issuer UTF-8
2016 "lno1pgz5znzfgdz3yq5qgytzzqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqg".parse::<Offer>(),
2017 Err(Bolt12ParseError::Decode(DecodeError::InvalidValue)),
2020 // Malformed: invalid offer_node_id
2022 "lno1pgz5znzfgdz3vggzqvpsxqcrqvpsxqcrqvpsxqcrqvpsxqcrqvpsxqcrqvpsxqcrqvps".parse::<Offer>(),
2023 Err(Bolt12ParseError::Decode(DecodeError::InvalidValue)),
2026 // Contains type >= 80
2028 "lno1pgz5znzfgdz3vggzqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgp9qgr0u2xq4dh3kdevrf4zg6hx8a60jv0gxe0ptgyfc6xkryqqqqqqqq".parse::<Offer>(),
2029 Err(Bolt12ParseError::Decode(DecodeError::InvalidValue)),
2032 // TODO: Resolved in spec https://github.com/lightning/bolts/pull/798/files#r1334851959
2033 // Contains unknown feature 22
2035 "lno1pgx9getnwss8vetrw3hhyucvqdqqqqqkyypwa3eyt44h6txtxquqh7lz5djge4afgfjn7k4rgrkuag0jsd5xvxg".parse::<Offer>().is_ok()
2038 // Missing offer_description
2040 // TODO: Match the spec once it is updated.
2041 "lno1pqpq86qkyypwa3eyt44h6txtxquqh7lz5djge4afgfjn7k4rgrkuag0jsd5xvxg".parse::<Offer>(),
2042 Err(Bolt12ParseError::InvalidSemantics(Bolt12SemanticError::MissingDescription)),
2045 // Missing offer_node_id"
2047 "lno1pgx9getnwss8vetrw3hhyuc".parse::<Offer>(),
2048 Err(Bolt12ParseError::InvalidSemantics(Bolt12SemanticError::MissingSigningPubkey)),