X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=blobdiff_plain;f=lightning%2Fsrc%2Foffers%2Finvoice.rs;h=908d2d4bee6d2f6b9091ae0d62ce7e650cbfe754;hb=45d7d2d95ee82fb5e9cccc028918dd49e664c673;hp=c3d4500aaebbb0b8f0c2d6abdb4f4179bfad3cf0;hpb=6d62d5d021ae877eab27a78a3628e71be211a028;p=rust-lightning diff --git a/lightning/src/offers/invoice.rs b/lightning/src/offers/invoice.rs index c3d4500a..4fcd38a1 100644 --- a/lightning/src/offers/invoice.rs +++ b/lightning/src/offers/invoice.rs @@ -1,4 +1,4 @@ -// This file is Copyright its original authors, visible in version control + // This file is Copyright its original authors, visible in version control // history. // // This file is licensed under the Apache License, Version 2.0 Vec<(BlindedPayInfo, BlindedPath)> { unimplemented!() } @@ -38,12 +39,13 @@ //! let payment_paths = create_payment_paths(); //! let payment_hash = create_payment_hash(); //! let secp_ctx = Secp256k1::new(); -//! let keys = KeyPair::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[42; 32])?); +//! let keys = Keypair::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[42; 32])?); //! let pubkey = PublicKey::from(keys); -//! let wpubkey_hash = bitcoin::util::key::PublicKey::new(pubkey).wpubkey_hash().unwrap(); +//! let wpubkey_hash = bitcoin::key::PublicKey::new(pubkey).wpubkey_hash().unwrap(); //! let mut buffer = Vec::new(); //! //! // Invoice for the "offer to be paid" flow. +//! # >::from( //! InvoiceRequest::try_from(bytes)? #![cfg_attr(feature = "std", doc = " .respond_with(payment_paths, payment_hash)? @@ -51,11 +53,14 @@ #![cfg_attr(not(feature = "std"), doc = " .respond_with_no_std(payment_paths, payment_hash, core::time::Duration::from_secs(0))? ")] +//! # ) //! .relative_expiry(3600) //! .allow_mpp() //! .fallback_v0_p2wpkh(&wpubkey_hash) //! .build()? -//! .sign::<_, Infallible>(|digest| Ok(secp_ctx.sign_schnorr_no_aux_rand(digest, &keys))) +//! .sign(|message: &UnsignedBolt12Invoice| +//! Ok(secp_ctx.sign_schnorr_no_aux_rand(message.as_ref().as_digest(), &keys)) +//! ) //! .expect("failed verifying signature") //! .write(&mut buffer) //! .unwrap(); @@ -66,12 +71,13 @@ //! # let payment_paths = create_payment_paths(); //! # let payment_hash = create_payment_hash(); //! # let secp_ctx = Secp256k1::new(); -//! # let keys = KeyPair::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[42; 32])?); +//! # let keys = Keypair::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[42; 32])?); //! # let pubkey = PublicKey::from(keys); -//! # let wpubkey_hash = bitcoin::util::key::PublicKey::new(pubkey).wpubkey_hash().unwrap(); +//! # let wpubkey_hash = bitcoin::key::PublicKey::new(pubkey).wpubkey_hash().unwrap(); //! # let mut buffer = Vec::new(); //! //! // Invoice for the "offer for money" flow. +//! # >::from( //! "lnr1qcp4256ypq" //! .parse::()? #![cfg_attr(feature = "std", doc = " @@ -80,11 +86,14 @@ #![cfg_attr(not(feature = "std"), doc = " .respond_with_no_std(payment_paths, payment_hash, pubkey, core::time::Duration::from_secs(0))? ")] +//! # ) //! .relative_expiry(3600) //! .allow_mpp() //! .fallback_v0_p2wpkh(&wpubkey_hash) //! .build()? -//! .sign::<_, Infallible>(|digest| Ok(secp_ctx.sign_schnorr_no_aux_rand(digest, &keys))) +//! .sign(|message: &UnsignedBolt12Invoice| +//! Ok(secp_ctx.sign_schnorr_no_aux_rand(message.as_ref().as_digest(), &keys)) +//! ) //! .expect("failed verifying signature") //! .write(&mut buffer) //! .unwrap(); @@ -93,25 +102,24 @@ //! //! ``` +use bitcoin::{WitnessProgram, Network, WitnessVersion}; use bitcoin::blockdata::constants::ChainHash; -use bitcoin::hash_types::{WPubkeyHash, WScriptHash}; -use bitcoin::hashes::Hash; -use bitcoin::network::constants::Network; -use bitcoin::secp256k1::{KeyPair, Message, PublicKey, Secp256k1, self}; +use bitcoin::secp256k1::{Keypair, PublicKey, Secp256k1, self}; use bitcoin::secp256k1::schnorr::Signature; -use bitcoin::util::address::{Address, Payload, WitnessVersion}; -use bitcoin::util::schnorr::TweakedPublicKey; -use core::convert::{Infallible, TryFrom}; +use bitcoin::address::{Address, Payload}; use core::time::Duration; +use core::hash::{Hash, Hasher}; use crate::io; use crate::blinded_path::BlindedPath; -use crate::ln::PaymentHash; -use crate::ln::features::{BlindedHopFeatures, Bolt12InvoiceFeatures}; +use crate::ln::types::PaymentHash; +use crate::ln::channelmanager::PaymentId; +use crate::ln::features::{BlindedHopFeatures, Bolt12InvoiceFeatures, InvoiceRequestFeatures, OfferFeatures}; use crate::ln::inbound_payment::ExpandedKey; use crate::ln::msgs::DecodeError; +use crate::offers::invoice_macros::invoice_builder_methods_common; use crate::offers::invoice_request::{INVOICE_REQUEST_PAYER_ID_TYPE, INVOICE_REQUEST_TYPES, IV_BYTES as INVOICE_REQUEST_IV_BYTES, InvoiceRequest, InvoiceRequestContents, InvoiceRequestTlvStream, InvoiceRequestTlvStreamRef}; -use crate::offers::merkle::{SignError, SignatureTlvStream, SignatureTlvStreamRef, TlvStream, WithoutSignatures, self}; -use crate::offers::offer::{Amount, OFFER_TYPES, OfferTlvStream, OfferTlvStreamRef}; +use crate::offers::merkle::{SignError, SignFn, SignatureTlvStream, SignatureTlvStreamRef, TaggedHash, TlvStream, WithoutSignatures, self}; +use crate::offers::offer::{Amount, OFFER_TYPES, OfferTlvStream, OfferTlvStreamRef, Quantity}; use crate::offers::parse::{Bolt12ParseError, Bolt12SemanticError, ParsedMessage}; use crate::offers::payer::{PAYER_METADATA_TYPE, PayerTlvStream, PayerTlvStreamRef}; use crate::offers::refund::{IV_BYTES as REFUND_IV_BYTES, Refund, RefundContents}; @@ -119,14 +127,16 @@ use crate::offers::signer; use crate::util::ser::{HighZeroBytesDroppedBigSize, Iterable, SeekReadable, WithoutLength, Writeable, Writer}; use crate::util::string::PrintableString; +#[allow(unused_imports)] use crate::prelude::*; #[cfg(feature = "std")] use std::time::SystemTime; -const DEFAULT_RELATIVE_EXPIRY: Duration = Duration::from_secs(7200); +pub(crate) const DEFAULT_RELATIVE_EXPIRY: Duration = Duration::from_secs(7200); -pub(super) const SIGNATURE_TAG: &'static str = concat!("lightning", "invoice", "signature"); +/// Tag for the hash function used when signing a [`Bolt12Invoice`]'s merkle root. +pub const SIGNATURE_TAG: &'static str = concat!("lightning", "invoice", "signature"); /// Builds a [`Bolt12Invoice`] from either: /// - an [`InvoiceRequest`] for the "offer to be paid" flow or @@ -142,8 +152,39 @@ pub(super) const SIGNATURE_TAG: &'static str = concat!("lightning", "invoice", " pub struct InvoiceBuilder<'a, S: SigningPubkeyStrategy> { invreq_bytes: &'a Vec, invoice: InvoiceContents, - keys: Option, - signing_pubkey_strategy: core::marker::PhantomData, + signing_pubkey_strategy: S, +} + +/// Builds a [`Bolt12Invoice`] from either: +/// - an [`InvoiceRequest`] for the "offer to be paid" flow or +/// - a [`Refund`] for the "offer for money" flow. +/// +/// See [module-level documentation] for usage. +/// +/// [`InvoiceRequest`]: crate::offers::invoice_request::InvoiceRequest +/// [`Refund`]: crate::offers::refund::Refund +/// [module-level documentation]: self +#[cfg(c_bindings)] +pub struct InvoiceWithExplicitSigningPubkeyBuilder<'a> { + invreq_bytes: &'a Vec, + invoice: InvoiceContents, + signing_pubkey_strategy: ExplicitSigningPubkey, +} + +/// Builds a [`Bolt12Invoice`] from either: +/// - an [`InvoiceRequest`] for the "offer to be paid" flow or +/// - a [`Refund`] for the "offer for money" flow. +/// +/// See [module-level documentation] for usage. +/// +/// [`InvoiceRequest`]: crate::offers::invoice_request::InvoiceRequest +/// [`Refund`]: crate::offers::refund::Refund +/// [module-level documentation]: self +#[cfg(c_bindings)] +pub struct InvoiceWithDerivedSigningPubkeyBuilder<'a> { + invreq_bytes: &'a Vec, + invoice: InvoiceContents, + signing_pubkey_strategy: DerivedSigningPubkey, } /// Indicates how [`Bolt12Invoice::signing_pubkey`] was set. @@ -159,18 +200,18 @@ pub struct ExplicitSigningPubkey {} /// [`Bolt12Invoice::signing_pubkey`] was derived. /// /// This is not exported to bindings users as builder patterns don't map outside of move semantics. -pub struct DerivedSigningPubkey {} +pub struct DerivedSigningPubkey(Keypair); impl SigningPubkeyStrategy for ExplicitSigningPubkey {} impl SigningPubkeyStrategy for DerivedSigningPubkey {} -impl<'a> InvoiceBuilder<'a, ExplicitSigningPubkey> { +macro_rules! invoice_explicit_signing_pubkey_builder_methods { ($self: ident, $self_type: ty) => { + #[cfg_attr(c_bindings, allow(dead_code))] pub(super) fn for_offer( invoice_request: &'a InvoiceRequest, payment_paths: Vec<(BlindedPayInfo, BlindedPath)>, - created_at: Duration, payment_hash: PaymentHash + created_at: Duration, payment_hash: PaymentHash, signing_pubkey: PublicKey ) -> Result { - let amount_msats = Self::check_amount_msats(invoice_request)?; - let signing_pubkey = invoice_request.contents.inner.offer.signing_pubkey(); + let amount_msats = Self::amount_msats(invoice_request)?; let contents = InvoiceContents::ForOffer { invoice_request: invoice_request.contents.clone(), fields: Self::fields( @@ -178,9 +219,10 @@ impl<'a> InvoiceBuilder<'a, ExplicitSigningPubkey> { ), }; - Self::new(&invoice_request.bytes, contents, None) + Self::new(&invoice_request.bytes, contents, ExplicitSigningPubkey {}) } + #[cfg_attr(c_bindings, allow(dead_code))] pub(super) fn for_refund( refund: &'a Refund, payment_paths: Vec<(BlindedPayInfo, BlindedPath)>, created_at: Duration, payment_hash: PaymentHash, signing_pubkey: PublicKey @@ -193,17 +235,42 @@ impl<'a> InvoiceBuilder<'a, ExplicitSigningPubkey> { ), }; - Self::new(&refund.bytes, contents, None) + Self::new(&refund.bytes, contents, ExplicitSigningPubkey {}) } -} -impl<'a> InvoiceBuilder<'a, DerivedSigningPubkey> { + /// Builds an unsigned [`Bolt12Invoice`] after checking for valid semantics. It can be signed by + /// [`UnsignedBolt12Invoice::sign`]. + pub fn build($self: $self_type) -> Result { + #[cfg(feature = "std")] { + if $self.invoice.is_offer_or_refund_expired() { + return Err(Bolt12SemanticError::AlreadyExpired); + } + } + + #[cfg(not(feature = "std"))] { + if $self.invoice.is_offer_or_refund_expired_no_std($self.invoice.created_at()) { + return Err(Bolt12SemanticError::AlreadyExpired); + } + } + + let Self { invreq_bytes, invoice, .. } = $self; + #[cfg(not(c_bindings))] { + Ok(UnsignedBolt12Invoice::new(invreq_bytes, invoice)) + } + #[cfg(c_bindings)] { + Ok(UnsignedBolt12Invoice::new(invreq_bytes, invoice.clone())) + } + } +} } + +macro_rules! invoice_derived_signing_pubkey_builder_methods { ($self: ident, $self_type: ty) => { + #[cfg_attr(c_bindings, allow(dead_code))] pub(super) fn for_offer_using_keys( invoice_request: &'a InvoiceRequest, payment_paths: Vec<(BlindedPayInfo, BlindedPath)>, - created_at: Duration, payment_hash: PaymentHash, keys: KeyPair + created_at: Duration, payment_hash: PaymentHash, keys: Keypair ) -> Result { - let amount_msats = Self::check_amount_msats(invoice_request)?; - let signing_pubkey = invoice_request.contents.inner.offer.signing_pubkey(); + let amount_msats = Self::amount_msats(invoice_request)?; + let signing_pubkey = keys.public_key(); let contents = InvoiceContents::ForOffer { invoice_request: invoice_request.contents.clone(), fields: Self::fields( @@ -211,12 +278,13 @@ impl<'a> InvoiceBuilder<'a, DerivedSigningPubkey> { ), }; - Self::new(&invoice_request.bytes, contents, Some(keys)) + Self::new(&invoice_request.bytes, contents, DerivedSigningPubkey(keys)) } + #[cfg_attr(c_bindings, allow(dead_code))] pub(super) fn for_refund_using_keys( refund: &'a Refund, payment_paths: Vec<(BlindedPayInfo, BlindedPath)>, created_at: Duration, - payment_hash: PaymentHash, keys: KeyPair, + payment_hash: PaymentHash, keys: Keypair, ) -> Result { let amount_msats = refund.amount_msats(); let signing_pubkey = keys.public_key(); @@ -227,12 +295,48 @@ impl<'a> InvoiceBuilder<'a, DerivedSigningPubkey> { ), }; - Self::new(&refund.bytes, contents, Some(keys)) + Self::new(&refund.bytes, contents, DerivedSigningPubkey(keys)) } -} -impl<'a, S: SigningPubkeyStrategy> InvoiceBuilder<'a, S> { - fn check_amount_msats(invoice_request: &InvoiceRequest) -> Result { + /// Builds a signed [`Bolt12Invoice`] after checking for valid semantics. + pub fn build_and_sign( + $self: $self_type, secp_ctx: &Secp256k1 + ) -> Result { + #[cfg(feature = "std")] { + if $self.invoice.is_offer_or_refund_expired() { + return Err(Bolt12SemanticError::AlreadyExpired); + } + } + + #[cfg(not(feature = "std"))] { + if $self.invoice.is_offer_or_refund_expired_no_std($self.invoice.created_at()) { + return Err(Bolt12SemanticError::AlreadyExpired); + } + } + + let Self { + invreq_bytes, invoice, signing_pubkey_strategy: DerivedSigningPubkey(keys) + } = $self; + #[cfg(not(c_bindings))] + let unsigned_invoice = UnsignedBolt12Invoice::new(invreq_bytes, invoice); + #[cfg(c_bindings)] + let mut unsigned_invoice = UnsignedBolt12Invoice::new(invreq_bytes, invoice.clone()); + + let invoice = unsigned_invoice + .sign(|message: &UnsignedBolt12Invoice| + Ok(secp_ctx.sign_schnorr_no_aux_rand(message.as_ref().as_digest(), &keys)) + ) + .unwrap(); + Ok(invoice) + } +} } + +macro_rules! invoice_builder_methods { ( + $self: ident, $self_type: ty, $return_type: ty, $return_value: expr, $type_param: ty $(, $self_mut: tt)? +) => { + pub(crate) fn amount_msats( + invoice_request: &InvoiceRequest + ) -> Result { match invoice_request.amount_msats() { Some(amount_msats) => Ok(amount_msats), None => match invoice_request.contents.inner.offer.amount() { @@ -246,6 +350,7 @@ impl<'a, S: SigningPubkeyStrategy> InvoiceBuilder<'a, S> { } } + #[cfg_attr(c_bindings, allow(dead_code))] fn fields( payment_paths: Vec<(BlindedPayInfo, BlindedPath)>, created_at: Duration, payment_hash: PaymentHash, amount_msats: u64, signing_pubkey: PublicKey @@ -256,159 +361,195 @@ impl<'a, S: SigningPubkeyStrategy> InvoiceBuilder<'a, S> { } } + #[cfg_attr(c_bindings, allow(dead_code))] fn new( - invreq_bytes: &'a Vec, contents: InvoiceContents, keys: Option + invreq_bytes: &'a Vec, contents: InvoiceContents, signing_pubkey_strategy: $type_param ) -> Result { if contents.fields().payment_paths.is_empty() { return Err(Bolt12SemanticError::MissingPaths); } - Ok(Self { - invreq_bytes, - invoice: contents, - keys, - signing_pubkey_strategy: core::marker::PhantomData, - }) + Ok(Self { invreq_bytes, invoice: contents, signing_pubkey_strategy }) } +} } - /// Sets the [`Bolt12Invoice::relative_expiry`] as seconds since [`Bolt12Invoice::created_at`]. - /// Any expiry that has already passed is valid and can be checked for using - /// [`Bolt12Invoice::is_expired`]. - /// - /// Successive calls to this method will override the previous setting. - pub fn relative_expiry(mut self, relative_expiry_secs: u32) -> Self { - let relative_expiry = Duration::from_secs(relative_expiry_secs as u64); - self.invoice.fields_mut().relative_expiry = Some(relative_expiry); - self - } +impl<'a> InvoiceBuilder<'a, ExplicitSigningPubkey> { + invoice_explicit_signing_pubkey_builder_methods!(self, Self); +} - /// Adds a P2WSH address to [`Bolt12Invoice::fallbacks`]. - /// - /// Successive calls to this method will add another address. Caller is responsible for not - /// adding duplicate addresses and only calling if capable of receiving to P2WSH addresses. - pub fn fallback_v0_p2wsh(mut self, script_hash: &WScriptHash) -> Self { - let address = FallbackAddress { - version: WitnessVersion::V0.to_num(), - program: Vec::from(&script_hash.into_inner()[..]), - }; - self.invoice.fields_mut().fallbacks.get_or_insert_with(Vec::new).push(address); - self - } +impl<'a> InvoiceBuilder<'a, DerivedSigningPubkey> { + invoice_derived_signing_pubkey_builder_methods!(self, Self); +} - /// Adds a P2WPKH address to [`Bolt12Invoice::fallbacks`]. - /// - /// Successive calls to this method will add another address. Caller is responsible for not - /// adding duplicate addresses and only calling if capable of receiving to P2WPKH addresses. - pub fn fallback_v0_p2wpkh(mut self, pubkey_hash: &WPubkeyHash) -> Self { - let address = FallbackAddress { - version: WitnessVersion::V0.to_num(), - program: Vec::from(&pubkey_hash.into_inner()[..]), - }; - self.invoice.fields_mut().fallbacks.get_or_insert_with(Vec::new).push(address); - self - } +impl<'a, S: SigningPubkeyStrategy> InvoiceBuilder<'a, S> { + invoice_builder_methods!(self, Self, Self, self, S, mut); + invoice_builder_methods_common!(self, Self, self.invoice.fields_mut(), Self, self, S, mut); +} - /// Adds a P2TR address to [`Bolt12Invoice::fallbacks`]. - /// - /// Successive calls to this method will add another address. Caller is responsible for not - /// adding duplicate addresses and only calling if capable of receiving to P2TR addresses. - pub fn fallback_v1_p2tr_tweaked(mut self, output_key: &TweakedPublicKey) -> Self { - let address = FallbackAddress { - version: WitnessVersion::V1.to_num(), - program: Vec::from(&output_key.serialize()[..]), - }; - self.invoice.fields_mut().fallbacks.get_or_insert_with(Vec::new).push(address); - self - } +#[cfg(all(c_bindings, not(test)))] +impl<'a> InvoiceWithExplicitSigningPubkeyBuilder<'a> { + invoice_explicit_signing_pubkey_builder_methods!(self, &mut Self); + invoice_builder_methods!(self, &mut Self, (), (), ExplicitSigningPubkey); + invoice_builder_methods_common!(self, &mut Self, self.invoice.fields_mut(), (), (), ExplicitSigningPubkey); +} - /// Sets [`Bolt12Invoice::features`] to indicate MPP may be used. Otherwise, MPP is disallowed. - pub fn allow_mpp(mut self) -> Self { - self.invoice.fields_mut().features.set_basic_mpp_optional(); - self - } +#[cfg(all(c_bindings, test))] +impl<'a> InvoiceWithExplicitSigningPubkeyBuilder<'a> { + invoice_explicit_signing_pubkey_builder_methods!(self, &mut Self); + invoice_builder_methods!(self, &mut Self, &mut Self, self, ExplicitSigningPubkey); + invoice_builder_methods_common!(self, &mut Self, self.invoice.fields_mut(), &mut Self, self, ExplicitSigningPubkey); } -impl<'a> InvoiceBuilder<'a, ExplicitSigningPubkey> { - /// Builds an unsigned [`Bolt12Invoice`] after checking for valid semantics. It can be signed by - /// [`UnsignedBolt12Invoice::sign`]. - pub fn build(self) -> Result, Bolt12SemanticError> { - #[cfg(feature = "std")] { - if self.invoice.is_offer_or_refund_expired() { - return Err(Bolt12SemanticError::AlreadyExpired); - } - } +#[cfg(all(c_bindings, not(test)))] +impl<'a> InvoiceWithDerivedSigningPubkeyBuilder<'a> { + invoice_derived_signing_pubkey_builder_methods!(self, &mut Self); + invoice_builder_methods!(self, &mut Self, (), (), DerivedSigningPubkey); + invoice_builder_methods_common!(self, &mut Self, self.invoice.fields_mut(), (), (), DerivedSigningPubkey); +} - let InvoiceBuilder { invreq_bytes, invoice, .. } = self; - Ok(UnsignedBolt12Invoice { invreq_bytes, invoice }) - } +#[cfg(all(c_bindings, test))] +impl<'a> InvoiceWithDerivedSigningPubkeyBuilder<'a> { + invoice_derived_signing_pubkey_builder_methods!(self, &mut Self); + invoice_builder_methods!(self, &mut Self, &mut Self, self, DerivedSigningPubkey); + invoice_builder_methods_common!(self, &mut Self, self.invoice.fields_mut(), &mut Self, self, DerivedSigningPubkey); } -impl<'a> InvoiceBuilder<'a, DerivedSigningPubkey> { - /// Builds a signed [`Bolt12Invoice`] after checking for valid semantics. - pub fn build_and_sign( - self, secp_ctx: &Secp256k1 - ) -> Result { - #[cfg(feature = "std")] { - if self.invoice.is_offer_or_refund_expired() { - return Err(Bolt12SemanticError::AlreadyExpired); - } +#[cfg(c_bindings)] +impl<'a> From> +for InvoiceBuilder<'a, ExplicitSigningPubkey> { + fn from(builder: InvoiceWithExplicitSigningPubkeyBuilder<'a>) -> Self { + let InvoiceWithExplicitSigningPubkeyBuilder { + invreq_bytes, invoice, signing_pubkey_strategy, + } = builder; + + Self { + invreq_bytes, invoice, signing_pubkey_strategy, } + } +} - let InvoiceBuilder { invreq_bytes, invoice, keys, .. } = self; - let unsigned_invoice = UnsignedBolt12Invoice { invreq_bytes, invoice }; +#[cfg(c_bindings)] +impl<'a> From> +for InvoiceBuilder<'a, DerivedSigningPubkey> { + fn from(builder: InvoiceWithDerivedSigningPubkeyBuilder<'a>) -> Self { + let InvoiceWithDerivedSigningPubkeyBuilder { + invreq_bytes, invoice, signing_pubkey_strategy, + } = builder; - let keys = keys.unwrap(); - let invoice = unsigned_invoice - .sign::<_, Infallible>(|digest| Ok(secp_ctx.sign_schnorr_no_aux_rand(digest, &keys))) - .unwrap(); - Ok(invoice) + Self { + invreq_bytes, invoice, signing_pubkey_strategy, + } } } /// A semantically valid [`Bolt12Invoice`] that hasn't been signed. -pub struct UnsignedBolt12Invoice<'a> { - invreq_bytes: &'a Vec, - invoice: InvoiceContents, +/// +/// # Serialization +/// +/// This is serialized as a TLV stream, which includes TLV records from the originating message. As +/// such, it may include unknown, odd TLV records. +#[derive(Clone)] +pub struct UnsignedBolt12Invoice { + bytes: Vec, + contents: InvoiceContents, + tagged_hash: TaggedHash, } -impl<'a> UnsignedBolt12Invoice<'a> { - /// The public key corresponding to the key needed to sign the invoice. - pub fn signing_pubkey(&self) -> PublicKey { - self.invoice.fields().signing_pubkey +/// A function for signing an [`UnsignedBolt12Invoice`]. +pub trait SignBolt12InvoiceFn { + /// Signs a [`TaggedHash`] computed over the merkle root of `message`'s TLV stream. + fn sign_invoice(&self, message: &UnsignedBolt12Invoice) -> Result; +} + +impl SignBolt12InvoiceFn for F +where + F: Fn(&UnsignedBolt12Invoice) -> Result, +{ + fn sign_invoice(&self, message: &UnsignedBolt12Invoice) -> Result { + self(message) } +} - /// Signs the invoice using the given function. - /// - /// This is not exported to bindings users as functions aren't currently mapped. - pub fn sign(self, sign: F) -> Result> - where - F: FnOnce(&Message) -> Result - { +impl SignFn for F +where + F: SignBolt12InvoiceFn, +{ + fn sign(&self, message: &UnsignedBolt12Invoice) -> Result { + self.sign_invoice(message) + } +} + +impl UnsignedBolt12Invoice { + fn new(invreq_bytes: &[u8], contents: InvoiceContents) -> Self { // Use the invoice_request bytes instead of the invoice_request TLV stream as the latter may // have contained unknown TLV records, which are not stored in `InvoiceRequestContents` or // `RefundContents`. - let (_, _, _, invoice_tlv_stream) = self.invoice.as_tlv_stream(); - let invoice_request_bytes = WithoutSignatures(self.invreq_bytes); + let (_, _, _, invoice_tlv_stream) = contents.as_tlv_stream(); + let invoice_request_bytes = WithoutSignatures(invreq_bytes); let unsigned_tlv_stream = (invoice_request_bytes, invoice_tlv_stream); let mut bytes = Vec::new(); unsigned_tlv_stream.write(&mut bytes).unwrap(); - let pubkey = self.invoice.fields().signing_pubkey; - let signature = merkle::sign_message(sign, SIGNATURE_TAG, &bytes, pubkey)?; + let tagged_hash = TaggedHash::from_valid_tlv_stream_bytes(SIGNATURE_TAG, &bytes); + + Self { bytes, contents, tagged_hash } + } + + /// Returns the [`TaggedHash`] of the invoice to sign. + pub fn tagged_hash(&self) -> &TaggedHash { + &self.tagged_hash + } +} + +macro_rules! unsigned_invoice_sign_method { ($self: ident, $self_type: ty $(, $self_mut: tt)?) => { + /// Signs the [`TaggedHash`] of the invoice using the given function. + /// + /// Note: The hash computation may have included unknown, odd TLV records. + pub fn sign( + $($self_mut)* $self: $self_type, sign: F + ) -> Result { + let pubkey = $self.contents.fields().signing_pubkey; + let signature = merkle::sign_message(sign, &$self, pubkey)?; // Append the signature TLV record to the bytes. let signature_tlv_stream = SignatureTlvStreamRef { signature: Some(&signature), }; - signature_tlv_stream.write(&mut bytes).unwrap(); + signature_tlv_stream.write(&mut $self.bytes).unwrap(); Ok(Bolt12Invoice { - bytes, - contents: self.invoice, + #[cfg(not(c_bindings))] + bytes: $self.bytes, + #[cfg(c_bindings)] + bytes: $self.bytes.clone(), + #[cfg(not(c_bindings))] + contents: $self.contents, + #[cfg(c_bindings)] + contents: $self.contents.clone(), signature, + #[cfg(not(c_bindings))] + tagged_hash: $self.tagged_hash, + #[cfg(c_bindings)] + tagged_hash: $self.tagged_hash.clone(), }) } +} } + +#[cfg(not(c_bindings))] +impl UnsignedBolt12Invoice { + unsigned_invoice_sign_method!(self, Self, mut); +} + +#[cfg(c_bindings)] +impl UnsignedBolt12Invoice { + unsigned_invoice_sign_method!(self, &mut Self); +} + +impl AsRef for UnsignedBolt12Invoice { + fn as_ref(&self) -> &TaggedHash { + &self.tagged_hash + } } /// A `Bolt12Invoice` is a payment request, typically corresponding to an [`Offer`] or a [`Refund`]. @@ -420,11 +561,11 @@ impl<'a> UnsignedBolt12Invoice<'a> { /// [`Refund`]: crate::offers::refund::Refund /// [`InvoiceRequest`]: crate::offers::invoice_request::InvoiceRequest #[derive(Clone, Debug)] -#[cfg_attr(test, derive(PartialEq))] pub struct Bolt12Invoice { bytes: Vec, contents: InvoiceContents, signature: Signature, + tagged_hash: TaggedHash, } /// The contents of an [`Bolt12Invoice`] for responding to either an [`Offer`] or a [`Refund`]. @@ -463,11 +604,140 @@ struct InvoiceFields { signing_pubkey: PublicKey, } -impl Bolt12Invoice { - /// A complete description of the purpose of the originating offer or refund. Intended to be - /// displayed to the user but with the caveat that it has not been verified in any way. - pub fn description(&self) -> PrintableString { - self.contents.description() +macro_rules! invoice_accessors { ($self: ident, $contents: expr) => { + /// The chains that may be used when paying a requested invoice. + /// + /// From [`Offer::chains`]; `None` if the invoice was created in response to a [`Refund`]. + /// + /// [`Offer::chains`]: crate::offers::offer::Offer::chains + pub fn offer_chains(&$self) -> Option> { + $contents.offer_chains() + } + + /// The chain that must be used when paying the invoice; selected from [`offer_chains`] if the + /// invoice originated from an offer. + /// + /// From [`InvoiceRequest::chain`] or [`Refund::chain`]. + /// + /// [`offer_chains`]: Self::offer_chains + /// [`InvoiceRequest::chain`]: crate::offers::invoice_request::InvoiceRequest::chain + pub fn chain(&$self) -> ChainHash { + $contents.chain() + } + + /// Opaque bytes set by the originating [`Offer`]. + /// + /// From [`Offer::metadata`]; `None` if the invoice was created in response to a [`Refund`] or + /// if the [`Offer`] did not set it. + /// + /// [`Offer`]: crate::offers::offer::Offer + /// [`Offer::metadata`]: crate::offers::offer::Offer::metadata + pub fn metadata(&$self) -> Option<&Vec> { + $contents.metadata() + } + + /// The minimum amount required for a successful payment of a single item. + /// + /// From [`Offer::amount`]; `None` if the invoice was created in response to a [`Refund`] or if + /// the [`Offer`] did not set it. + /// + /// [`Offer`]: crate::offers::offer::Offer + /// [`Offer::amount`]: crate::offers::offer::Offer::amount + pub fn amount(&$self) -> Option { + $contents.amount() + } + + /// Features pertaining to the originating [`Offer`]. + /// + /// From [`Offer::offer_features`]; `None` if the invoice was created in response to a + /// [`Refund`]. + /// + /// [`Offer`]: crate::offers::offer::Offer + /// [`Offer::offer_features`]: crate::offers::offer::Offer::offer_features + pub fn offer_features(&$self) -> Option<&OfferFeatures> { + $contents.offer_features() + } + + /// A complete description of the purpose of the originating offer or refund. + /// + /// From [`Offer::description`] or [`Refund::description`]. + /// + /// [`Offer::description`]: crate::offers::offer::Offer::description + pub fn description(&$self) -> Option { + $contents.description() + } + + /// Duration since the Unix epoch when an invoice should no longer be requested. + /// + /// From [`Offer::absolute_expiry`] or [`Refund::absolute_expiry`]. + /// + /// [`Offer::absolute_expiry`]: crate::offers::offer::Offer::absolute_expiry + pub fn absolute_expiry(&$self) -> Option { + $contents.absolute_expiry() + } + + /// The issuer of the offer or refund. + /// + /// From [`Offer::issuer`] or [`Refund::issuer`]. + /// + /// [`Offer::issuer`]: crate::offers::offer::Offer::issuer + pub fn issuer(&$self) -> Option { + $contents.issuer() + } + + /// Paths to the recipient originating from publicly reachable nodes. + /// + /// From [`Offer::paths`] or [`Refund::paths`]. + /// + /// [`Offer::paths`]: crate::offers::offer::Offer::paths + pub fn message_paths(&$self) -> &[BlindedPath] { + $contents.message_paths() + } + + /// The quantity of items supported. + /// + /// From [`Offer::supported_quantity`]; `None` if the invoice was created in response to a + /// [`Refund`]. + /// + /// [`Offer::supported_quantity`]: crate::offers::offer::Offer::supported_quantity + pub fn supported_quantity(&$self) -> Option { + $contents.supported_quantity() + } + + /// An unpredictable series of bytes from the payer. + /// + /// From [`InvoiceRequest::payer_metadata`] or [`Refund::payer_metadata`]. + pub fn payer_metadata(&$self) -> &[u8] { + $contents.payer_metadata() + } + + /// Features pertaining to requesting an invoice. + /// + /// From [`InvoiceRequest::invoice_request_features`] or [`Refund::features`]. + pub fn invoice_request_features(&$self) -> &InvoiceRequestFeatures { + &$contents.invoice_request_features() + } + + /// The quantity of items requested or refunded for. + /// + /// From [`InvoiceRequest::quantity`] or [`Refund::quantity`]. + pub fn quantity(&$self) -> Option { + $contents.quantity() + } + + /// A possibly transient pubkey used to sign the invoice request or to send an invoice for a + /// refund in case there are no [`message_paths`]. + /// + /// [`message_paths`]: Self::message_paths + pub fn payer_id(&$self) -> PublicKey { + $contents.payer_id() + } + + /// A payer-provided note reflected back in the invoice. + /// + /// From [`InvoiceRequest::payer_note`] or [`Refund::payer_note`]. + pub fn payer_note(&$self) -> Option { + $contents.payer_note() } /// Paths to the recipient originating from publicly reachable nodes, including information @@ -478,108 +748,60 @@ impl Bolt12Invoice { /// /// This is not exported to bindings users as slices with non-reference types cannot be ABI /// matched in another language. - pub fn payment_paths(&self) -> &[(BlindedPayInfo, BlindedPath)] { - &self.contents.fields().payment_paths[..] + pub fn payment_paths(&$self) -> &[(BlindedPayInfo, BlindedPath)] { + $contents.payment_paths() } /// Duration since the Unix epoch when the invoice was created. - pub fn created_at(&self) -> Duration { - self.contents.fields().created_at + pub fn created_at(&$self) -> Duration { + $contents.created_at() } /// Duration since [`Bolt12Invoice::created_at`] when the invoice has expired and therefore /// should no longer be paid. - pub fn relative_expiry(&self) -> Duration { - self.contents.fields().relative_expiry.unwrap_or(DEFAULT_RELATIVE_EXPIRY) + pub fn relative_expiry(&$self) -> Duration { + $contents.relative_expiry() } /// Whether the invoice has expired. #[cfg(feature = "std")] - pub fn is_expired(&self) -> bool { - let absolute_expiry = self.created_at().checked_add(self.relative_expiry()); - match absolute_expiry { - Some(seconds_from_epoch) => match SystemTime::UNIX_EPOCH.elapsed() { - Ok(elapsed) => elapsed > seconds_from_epoch, - Err(_) => false, - }, - None => false, - } + pub fn is_expired(&$self) -> bool { + $contents.is_expired() } /// SHA256 hash of the payment preimage that will be given in return for paying the invoice. - pub fn payment_hash(&self) -> PaymentHash { - self.contents.fields().payment_hash + pub fn payment_hash(&$self) -> PaymentHash { + $contents.payment_hash() } /// The minimum amount required for a successful payment of the invoice. - pub fn amount_msats(&self) -> u64 { - self.contents.fields().amount_msats + pub fn amount_msats(&$self) -> u64 { + $contents.amount_msats() } /// Fallback addresses for paying the invoice on-chain, in order of most-preferred to /// least-preferred. - pub fn fallbacks(&self) -> Vec
{ - let network = match self.network() { - None => return Vec::new(), - Some(network) => network, - }; - - let to_valid_address = |address: &FallbackAddress| { - let version = match WitnessVersion::try_from(address.version) { - Ok(version) => version, - Err(_) => return None, - }; - - let program = &address.program; - if program.len() < 2 || program.len() > 40 { - return None; - } - - let address = Address { - payload: Payload::WitnessProgram { - version, - program: address.program.clone(), - }, - network, - }; - - if !address.is_standard() && version == WitnessVersion::V0 { - return None; - } - - Some(address) - }; - - self.contents.fields().fallbacks - .as_ref() - .map(|fallbacks| fallbacks.iter().filter_map(to_valid_address).collect()) - .unwrap_or_else(Vec::new) - } - - fn network(&self) -> Option { - let chain = self.contents.chain(); - if chain == ChainHash::using_genesis_block(Network::Bitcoin) { - Some(Network::Bitcoin) - } else if chain == ChainHash::using_genesis_block(Network::Testnet) { - Some(Network::Testnet) - } else if chain == ChainHash::using_genesis_block(Network::Signet) { - Some(Network::Signet) - } else if chain == ChainHash::using_genesis_block(Network::Regtest) { - Some(Network::Regtest) - } else { - None - } + pub fn fallbacks(&$self) -> Vec
{ + $contents.fallbacks() } /// Features pertaining to paying an invoice. - pub fn features(&self) -> &Bolt12InvoiceFeatures { - &self.contents.fields().features + pub fn invoice_features(&$self) -> &Bolt12InvoiceFeatures { + $contents.features() } /// The public key corresponding to the key used to sign the invoice. - pub fn signing_pubkey(&self) -> PublicKey { - self.contents.fields().signing_pubkey + pub fn signing_pubkey(&$self) -> PublicKey { + $contents.signing_pubkey() } +} } + +impl UnsignedBolt12Invoice { + invoice_accessors!(self, self.contents); +} + +impl Bolt12Invoice { + invoice_accessors!(self, self.contents); /// Signature of the invoice verified using [`Bolt12Invoice::signing_pubkey`]. pub fn signature(&self) -> Signature { @@ -588,18 +810,18 @@ impl Bolt12Invoice { /// Hash that was used for signing the invoice. pub fn signable_hash(&self) -> [u8; 32] { - merkle::message_digest(SIGNATURE_TAG, &self.bytes).as_ref().clone() + self.tagged_hash.as_digest().as_ref().clone() } - /// Verifies that the invoice was for a request or refund created using the given key. + /// Verifies that the invoice was for a request or refund created using the given key. Returns + /// the associated [`PaymentId`] to use when sending the payment. pub fn verify( &self, key: &ExpandedKey, secp_ctx: &Secp256k1 - ) -> bool { + ) -> Result { self.contents.verify(TlvStream::new(&self.bytes), key, secp_ctx) } - #[cfg(test)] - pub(super) fn as_tlv_stream(&self) -> FullInvoiceTlvStreamRef { + pub(crate) fn as_tlv_stream(&self) -> FullInvoiceTlvStreamRef { let (payer_tlv_stream, offer_tlv_stream, invoice_request_tlv_stream, invoice_tlv_stream) = self.contents.as_tlv_stream(); let signature_tlv_stream = SignatureTlvStreamRef { @@ -610,6 +832,20 @@ impl Bolt12Invoice { } } +impl PartialEq for Bolt12Invoice { + fn eq(&self, other: &Self) -> bool { + self.bytes.eq(&other.bytes) + } +} + +impl Eq for Bolt12Invoice {} + +impl Hash for Bolt12Invoice { + fn hash(&self, state: &mut H) { + self.bytes.hash(state); + } +} + impl InvoiceContents { /// Whether the original offer or refund has expired. #[cfg(feature = "std")] @@ -621,6 +857,24 @@ impl InvoiceContents { } } + #[cfg(not(feature = "std"))] + fn is_offer_or_refund_expired_no_std(&self, duration_since_epoch: Duration) -> bool { + match self { + InvoiceContents::ForOffer { invoice_request, .. } => + invoice_request.inner.offer.is_expired_no_std(duration_since_epoch), + InvoiceContents::ForRefund { refund, .. } => + refund.is_expired_no_std(duration_since_epoch), + } + } + + fn offer_chains(&self) -> Option> { + match self { + InvoiceContents::ForOffer { invoice_request, .. } => + Some(invoice_request.inner.offer.chains()), + InvoiceContents::ForRefund { .. } => None, + } + } + fn chain(&self) -> ChainHash { match self { InvoiceContents::ForOffer { invoice_request, .. } => invoice_request.chain(), @@ -628,15 +882,185 @@ impl InvoiceContents { } } - fn description(&self) -> PrintableString { + fn metadata(&self) -> Option<&Vec> { + match self { + InvoiceContents::ForOffer { invoice_request, .. } => + invoice_request.inner.offer.metadata(), + InvoiceContents::ForRefund { .. } => None, + } + } + + fn amount(&self) -> Option { + match self { + InvoiceContents::ForOffer { invoice_request, .. } => + invoice_request.inner.offer.amount(), + InvoiceContents::ForRefund { .. } => None, + } + } + + fn description(&self) -> Option { match self { InvoiceContents::ForOffer { invoice_request, .. } => { invoice_request.inner.offer.description() }, - InvoiceContents::ForRefund { refund, .. } => refund.description(), + InvoiceContents::ForRefund { refund, .. } => Some(refund.description()), + } + } + + fn offer_features(&self) -> Option<&OfferFeatures> { + match self { + InvoiceContents::ForOffer { invoice_request, .. } => { + Some(invoice_request.inner.offer.features()) + }, + InvoiceContents::ForRefund { .. } => None, } } + fn absolute_expiry(&self) -> Option { + match self { + InvoiceContents::ForOffer { invoice_request, .. } => { + invoice_request.inner.offer.absolute_expiry() + }, + InvoiceContents::ForRefund { refund, .. } => refund.absolute_expiry(), + } + } + + fn issuer(&self) -> Option { + match self { + InvoiceContents::ForOffer { invoice_request, .. } => { + invoice_request.inner.offer.issuer() + }, + InvoiceContents::ForRefund { refund, .. } => refund.issuer(), + } + } + + fn message_paths(&self) -> &[BlindedPath] { + match self { + InvoiceContents::ForOffer { invoice_request, .. } => { + invoice_request.inner.offer.paths() + }, + InvoiceContents::ForRefund { refund, .. } => refund.paths(), + } + } + + fn supported_quantity(&self) -> Option { + match self { + InvoiceContents::ForOffer { invoice_request, .. } => { + Some(invoice_request.inner.offer.supported_quantity()) + }, + InvoiceContents::ForRefund { .. } => None, + } + } + + fn payer_metadata(&self) -> &[u8] { + match self { + InvoiceContents::ForOffer { invoice_request, .. } => invoice_request.metadata(), + InvoiceContents::ForRefund { refund, .. } => refund.metadata(), + } + } + + fn invoice_request_features(&self) -> &InvoiceRequestFeatures { + match self { + InvoiceContents::ForOffer { invoice_request, .. } => invoice_request.features(), + InvoiceContents::ForRefund { refund, .. } => refund.features(), + } + } + + fn quantity(&self) -> Option { + match self { + InvoiceContents::ForOffer { invoice_request, .. } => invoice_request.quantity(), + InvoiceContents::ForRefund { refund, .. } => refund.quantity(), + } + } + + fn payer_id(&self) -> PublicKey { + match self { + InvoiceContents::ForOffer { invoice_request, .. } => invoice_request.payer_id(), + InvoiceContents::ForRefund { refund, .. } => refund.payer_id(), + } + } + + fn payer_note(&self) -> Option { + match self { + InvoiceContents::ForOffer { invoice_request, .. } => invoice_request.payer_note(), + InvoiceContents::ForRefund { refund, .. } => refund.payer_note(), + } + } + + fn payment_paths(&self) -> &[(BlindedPayInfo, BlindedPath)] { + &self.fields().payment_paths[..] + } + + fn created_at(&self) -> Duration { + self.fields().created_at + } + + fn relative_expiry(&self) -> Duration { + self.fields().relative_expiry.unwrap_or(DEFAULT_RELATIVE_EXPIRY) + } + + #[cfg(feature = "std")] + fn is_expired(&self) -> bool { + let absolute_expiry = self.created_at().checked_add(self.relative_expiry()); + match absolute_expiry { + Some(seconds_from_epoch) => match SystemTime::UNIX_EPOCH.elapsed() { + Ok(elapsed) => elapsed > seconds_from_epoch, + Err(_) => false, + }, + None => false, + } + } + + fn payment_hash(&self) -> PaymentHash { + self.fields().payment_hash + } + + fn amount_msats(&self) -> u64 { + self.fields().amount_msats + } + + fn fallbacks(&self) -> Vec
{ + let chain = self.chain(); + let network = if chain == ChainHash::using_genesis_block(Network::Bitcoin) { + Network::Bitcoin + } else if chain == ChainHash::using_genesis_block(Network::Testnet) { + Network::Testnet + } else if chain == ChainHash::using_genesis_block(Network::Signet) { + Network::Signet + } else if chain == ChainHash::using_genesis_block(Network::Regtest) { + Network::Regtest + } else { + return Vec::new() + }; + + let to_valid_address = |address: &FallbackAddress| { + let version = match WitnessVersion::try_from(address.version) { + Ok(version) => version, + Err(_) => return None, + }; + + let program = address.program.clone(); + let witness_program = match WitnessProgram::new(version, program) { + Ok(witness_program) => witness_program, + Err(_) => return None, + }; + Some(Address::new(network, Payload::WitnessProgram(witness_program))) + }; + + self.fields().fallbacks + .as_ref() + .map(|fallbacks| fallbacks.iter().filter_map(to_valid_address).collect()) + .unwrap_or_else(Vec::new) + } + + fn features(&self) -> &Bolt12InvoiceFeatures { + &self.fields().features + } + + fn signing_pubkey(&self) -> PublicKey { + self.fields().signing_pubkey + } + fn fields(&self) -> &InvoiceFields { match self { InvoiceContents::ForOffer { fields, .. } => fields, @@ -653,7 +1077,7 @@ impl InvoiceContents { fn verify( &self, tlv_stream: TlvStream<'_>, key: &ExpandedKey, secp_ctx: &Secp256k1 - ) -> bool { + ) -> Result { let offer_records = tlv_stream.clone().range(OFFER_TYPES); let invreq_records = tlv_stream.range(INVOICE_REQUEST_TYPES).filter(|record| { match record.r#type { @@ -673,10 +1097,7 @@ impl InvoiceContents { }, }; - match signer::verify_metadata(metadata, key, iv_bytes, payer_id, tlv_stream, secp_ctx) { - Ok(_) => true, - Err(()) => false, - } + signer::verify_payer_metadata(metadata, key, iv_bytes, payer_id, tlv_stream, secp_ctx) } fn derives_keys(&self) -> bool { @@ -718,6 +1139,12 @@ impl InvoiceFields { } } +impl Writeable for UnsignedBolt12Invoice { + fn write(&self, writer: &mut W) -> Result<(), io::Error> { + WithoutLength(&self.bytes).write(writer) + } +} + impl Writeable for Bolt12Invoice { fn write(&self, writer: &mut W) -> Result<(), io::Error> { WithoutLength(&self.bytes).write(writer) @@ -730,6 +1157,25 @@ impl Writeable for InvoiceContents { } } +impl TryFrom> for UnsignedBolt12Invoice { + type Error = Bolt12ParseError; + + fn try_from(bytes: Vec) -> Result { + let invoice = ParsedMessage::::try_from(bytes)?; + let ParsedMessage { bytes, tlv_stream } = invoice; + let ( + payer_tlv_stream, offer_tlv_stream, invoice_request_tlv_stream, invoice_tlv_stream, + ) = tlv_stream; + let contents = InvoiceContents::try_from( + (payer_tlv_stream, offer_tlv_stream, invoice_request_tlv_stream, invoice_tlv_stream) + )?; + + let tagged_hash = TaggedHash::from_valid_tlv_stream_bytes(SIGNATURE_TAG, &bytes); + + Ok(UnsignedBolt12Invoice { bytes, contents, tagged_hash }) + } +} + impl TryFrom> for Bolt12Invoice { type Error = Bolt12ParseError; @@ -811,7 +1257,6 @@ impl_writeable!(FallbackAddress, { version, program }); type FullInvoiceTlvStream = (PayerTlvStream, OfferTlvStream, InvoiceRequestTlvStream, InvoiceTlvStream, SignatureTlvStream); -#[cfg(test)] type FullInvoiceTlvStreamRef<'a> = ( PayerTlvStreamRef<'a>, OfferTlvStreamRef<'a>, @@ -842,6 +1287,17 @@ type PartialInvoiceTlvStreamRef<'a> = ( InvoiceTlvStreamRef<'a>, ); +impl SeekReadable for PartialInvoiceTlvStream { + fn read(r: &mut R) -> Result { + let payer = SeekReadable::read(r)?; + let offer = SeekReadable::read(r)?; + let invoice_request = SeekReadable::read(r)?; + let invoice = SeekReadable::read(r)?; + + Ok((payer, offer, invoice_request, invoice)) + } +} + impl TryFrom> for Bolt12Invoice { type Error = Bolt12ParseError; @@ -859,10 +1315,11 @@ impl TryFrom> for Bolt12Invoice { None => return Err(Bolt12ParseError::InvalidSemantics(Bolt12SemanticError::MissingSignature)), Some(signature) => signature, }; + let tagged_hash = TaggedHash::from_valid_tlv_stream_bytes(SIGNATURE_TAG, &bytes); let pubkey = contents.fields().signing_pubkey; - merkle::verify_signature(&signature, SIGNATURE_TAG, &bytes, pubkey)?; + merkle::verify_signature(&signature, &tagged_hash, pubkey)?; - Ok(Bolt12Invoice { bytes, contents, signature }) + Ok(Bolt12Invoice { bytes, contents, signature, tagged_hash }) } } @@ -923,8 +1380,8 @@ impl TryFrom for InvoiceContents { features, signing_pubkey, }; - match offer_tlv_stream.node_id { - Some(expected_signing_pubkey) => { + match (offer_tlv_stream.node_id, &offer_tlv_stream.paths) { + (Some(expected_signing_pubkey), _) => { if fields.signing_pubkey != expected_signing_pubkey { return Err(Bolt12SemanticError::InvalidSigningPubkey); } @@ -934,7 +1391,21 @@ impl TryFrom for InvoiceContents { )?; Ok(InvoiceContents::ForOffer { invoice_request, fields }) }, - None => { + (None, Some(paths)) => { + if !paths + .iter() + .filter_map(|path| path.blinded_hops.last()) + .any(|last_hop| fields.signing_pubkey == last_hop.blinded_node_id) + { + return Err(Bolt12SemanticError::InvalidSigningPubkey); + } + + let invoice_request = InvoiceRequestContents::try_from( + (payer_tlv_stream, offer_tlv_stream, invoice_request_tlv_stream) + )?; + Ok(InvoiceContents::ForOffer { invoice_request, fields }) + }, + (None, None) => { let refund = RefundContents::try_from( (payer_tlv_stream, offer_tlv_stream, invoice_request_tlv_stream) )?; @@ -946,27 +1417,40 @@ impl TryFrom for InvoiceContents { #[cfg(test)] mod tests { - use super::{Bolt12Invoice, DEFAULT_RELATIVE_EXPIRY, FallbackAddress, FullInvoiceTlvStreamRef, InvoiceTlvStreamRef, SIGNATURE_TAG}; + use super::{Bolt12Invoice, DEFAULT_RELATIVE_EXPIRY, FallbackAddress, FullInvoiceTlvStreamRef, InvoiceTlvStreamRef, SIGNATURE_TAG, UnsignedBolt12Invoice}; - use bitcoin::blockdata::script::Script; + use bitcoin::{WitnessProgram, WitnessVersion}; + use bitcoin::blockdata::constants::ChainHash; + use bitcoin::blockdata::script::ScriptBuf; use bitcoin::hashes::Hash; - use bitcoin::network::constants::Network; - use bitcoin::secp256k1::{Message, Secp256k1, XOnlyPublicKey, self}; - use bitcoin::util::address::{Address, Payload, WitnessVersion}; - use bitcoin::util::schnorr::TweakedPublicKey; - use core::convert::TryFrom; + use bitcoin::network::Network; + use bitcoin::secp256k1::{Keypair, Message, Secp256k1, SecretKey, XOnlyPublicKey, self}; + use bitcoin::address::{Address, Payload}; + use bitcoin::key::TweakedPublicKey; + use core::time::Duration; - use crate::blinded_path::{BlindedHop, BlindedPath}; + + use crate::blinded_path::{BlindedHop, BlindedPath, IntroductionNode}; use crate::sign::KeyMaterial; - use crate::ln::features::Bolt12InvoiceFeatures; + use crate::ln::features::{Bolt12InvoiceFeatures, InvoiceRequestFeatures, OfferFeatures}; use crate::ln::inbound_payment::ExpandedKey; use crate::ln::msgs::DecodeError; use crate::offers::invoice_request::InvoiceRequestTlvStreamRef; - use crate::offers::merkle::{SignError, SignatureTlvStreamRef, self}; - use crate::offers::offer::{OfferBuilder, OfferTlvStreamRef, Quantity}; + use crate::offers::merkle::{SignError, SignatureTlvStreamRef, TaggedHash, self}; + use crate::offers::offer::{Amount, OfferTlvStreamRef, Quantity}; + use crate::prelude::*; + #[cfg(not(c_bindings))] + use { + crate::offers::offer::OfferBuilder, + crate::offers::refund::RefundBuilder, + }; + #[cfg(c_bindings)] + use { + crate::offers::offer::OfferWithExplicitMetadataBuilder as OfferBuilder, + crate::offers::refund::RefundMaybeWithDerivedMetadataBuilder as RefundBuilder, + }; use crate::offers::parse::{Bolt12ParseError, Bolt12SemanticError}; use crate::offers::payer::PayerTlvStreamRef; - use crate::offers::refund::RefundBuilder; use crate::offers::test_utils::*; use crate::util::ser::{BigSize, Iterable, Writeable}; use crate::util::string::PrintableString; @@ -992,38 +1476,91 @@ mod tests { let payment_paths = payment_paths(); let payment_hash = payment_hash(); let now = now(); - let invoice = OfferBuilder::new("foo".into(), recipient_pubkey()) + let unsigned_invoice = OfferBuilder::new(recipient_pubkey()) .amount_msats(1000) .build().unwrap() .request_invoice(vec![1; 32], payer_pubkey()).unwrap() .build().unwrap() .sign(payer_sign).unwrap() .respond_with_no_std(payment_paths.clone(), payment_hash, now).unwrap() - .build().unwrap() - .sign(recipient_sign).unwrap(); + .build().unwrap(); + + let mut buffer = Vec::new(); + unsigned_invoice.write(&mut buffer).unwrap(); + + assert_eq!(unsigned_invoice.bytes, buffer.as_slice()); + assert_eq!(unsigned_invoice.payer_metadata(), &[1; 32]); + assert_eq!(unsigned_invoice.offer_chains(), Some(vec![ChainHash::using_genesis_block(Network::Bitcoin)])); + assert_eq!(unsigned_invoice.metadata(), None); + assert_eq!(unsigned_invoice.amount(), Some(Amount::Bitcoin { amount_msats: 1000 })); + assert_eq!(unsigned_invoice.description(), Some(PrintableString(""))); + assert_eq!(unsigned_invoice.offer_features(), Some(&OfferFeatures::empty())); + assert_eq!(unsigned_invoice.absolute_expiry(), None); + assert_eq!(unsigned_invoice.message_paths(), &[]); + assert_eq!(unsigned_invoice.issuer(), None); + assert_eq!(unsigned_invoice.supported_quantity(), Some(Quantity::One)); + assert_eq!(unsigned_invoice.signing_pubkey(), recipient_pubkey()); + assert_eq!(unsigned_invoice.chain(), ChainHash::using_genesis_block(Network::Bitcoin)); + assert_eq!(unsigned_invoice.amount_msats(), 1000); + assert_eq!(unsigned_invoice.invoice_request_features(), &InvoiceRequestFeatures::empty()); + assert_eq!(unsigned_invoice.quantity(), None); + assert_eq!(unsigned_invoice.payer_id(), payer_pubkey()); + assert_eq!(unsigned_invoice.payer_note(), None); + assert_eq!(unsigned_invoice.payment_paths(), payment_paths.as_slice()); + assert_eq!(unsigned_invoice.created_at(), now); + assert_eq!(unsigned_invoice.relative_expiry(), DEFAULT_RELATIVE_EXPIRY); + #[cfg(feature = "std")] + assert!(!unsigned_invoice.is_expired()); + assert_eq!(unsigned_invoice.payment_hash(), payment_hash); + assert!(unsigned_invoice.fallbacks().is_empty()); + assert_eq!(unsigned_invoice.invoice_features(), &Bolt12InvoiceFeatures::empty()); + + match UnsignedBolt12Invoice::try_from(buffer) { + Err(e) => panic!("error parsing unsigned invoice: {:?}", e), + Ok(parsed) => { + assert_eq!(parsed.bytes, unsigned_invoice.bytes); + assert_eq!(parsed.tagged_hash, unsigned_invoice.tagged_hash); + }, + } + + #[cfg(c_bindings)] + let mut unsigned_invoice = unsigned_invoice; + let invoice = unsigned_invoice.sign(recipient_sign).unwrap(); let mut buffer = Vec::new(); invoice.write(&mut buffer).unwrap(); assert_eq!(invoice.bytes, buffer.as_slice()); - assert_eq!(invoice.description(), PrintableString("foo")); + assert_eq!(invoice.payer_metadata(), &[1; 32]); + assert_eq!(invoice.offer_chains(), Some(vec![ChainHash::using_genesis_block(Network::Bitcoin)])); + assert_eq!(invoice.metadata(), None); + assert_eq!(invoice.amount(), Some(Amount::Bitcoin { amount_msats: 1000 })); + assert_eq!(invoice.description(), Some(PrintableString(""))); + assert_eq!(invoice.offer_features(), Some(&OfferFeatures::empty())); + assert_eq!(invoice.absolute_expiry(), None); + assert_eq!(invoice.message_paths(), &[]); + assert_eq!(invoice.issuer(), None); + assert_eq!(invoice.supported_quantity(), Some(Quantity::One)); + assert_eq!(invoice.signing_pubkey(), recipient_pubkey()); + assert_eq!(invoice.chain(), ChainHash::using_genesis_block(Network::Bitcoin)); + assert_eq!(invoice.amount_msats(), 1000); + assert_eq!(invoice.invoice_request_features(), &InvoiceRequestFeatures::empty()); + assert_eq!(invoice.quantity(), None); + assert_eq!(invoice.payer_id(), payer_pubkey()); + assert_eq!(invoice.payer_note(), None); assert_eq!(invoice.payment_paths(), payment_paths.as_slice()); assert_eq!(invoice.created_at(), now); assert_eq!(invoice.relative_expiry(), DEFAULT_RELATIVE_EXPIRY); #[cfg(feature = "std")] assert!(!invoice.is_expired()); assert_eq!(invoice.payment_hash(), payment_hash); - assert_eq!(invoice.amount_msats(), 1000); - assert_eq!(invoice.fallbacks(), vec![]); - assert_eq!(invoice.features(), &Bolt12InvoiceFeatures::empty()); - assert_eq!(invoice.signing_pubkey(), recipient_pubkey()); - assert!( - merkle::verify_signature( - &invoice.signature, SIGNATURE_TAG, &invoice.bytes, recipient_pubkey() - ).is_ok() - ); + assert!(invoice.fallbacks().is_empty()); + assert_eq!(invoice.invoice_features(), &Bolt12InvoiceFeatures::empty()); - let digest = Message::from_slice(&invoice.signable_hash()).unwrap(); + let message = TaggedHash::from_valid_tlv_stream_bytes(SIGNATURE_TAG, &invoice.bytes); + assert!(merkle::verify_signature(&invoice.signature, &message, recipient_pubkey()).is_ok()); + + let digest = Message::from_digest(invoice.signable_hash()); let pubkey = recipient_pubkey().into(); let secp_ctx = Secp256k1::verification_only(); assert!(secp_ctx.verify_schnorr(&invoice.signature, &digest, &pubkey).is_ok()); @@ -1037,7 +1574,7 @@ mod tests { metadata: None, currency: None, amount: Some(1000), - description: Some(&String::from("foo")), + description: Some(&String::from("")), features: None, absolute_expiry: None, paths: None, @@ -1052,6 +1589,7 @@ mod tests { quantity: None, payer_id: Some(&payer_pubkey()), payer_note: None, + paths: None, }, InvoiceTlvStreamRef { paths: Some(Iterable(payment_paths.iter().map(|(_, path)| path))), @@ -1078,7 +1616,7 @@ mod tests { let payment_paths = payment_paths(); let payment_hash = payment_hash(); let now = now(); - let invoice = RefundBuilder::new("foo".into(), vec![1; 32], payer_pubkey(), 1000).unwrap() + let invoice = RefundBuilder::new(vec![1; 32], payer_pubkey(), 1000).unwrap() .build().unwrap() .respond_with_no_std(payment_paths.clone(), payment_hash, recipient_pubkey(), now) .unwrap() @@ -1089,22 +1627,34 @@ mod tests { invoice.write(&mut buffer).unwrap(); assert_eq!(invoice.bytes, buffer.as_slice()); - assert_eq!(invoice.description(), PrintableString("foo")); + assert_eq!(invoice.payer_metadata(), &[1; 32]); + assert_eq!(invoice.offer_chains(), None); + assert_eq!(invoice.metadata(), None); + assert_eq!(invoice.amount(), None); + assert_eq!(invoice.description(), Some(PrintableString(""))); + assert_eq!(invoice.offer_features(), None); + assert_eq!(invoice.absolute_expiry(), None); + assert_eq!(invoice.message_paths(), &[]); + assert_eq!(invoice.issuer(), None); + assert_eq!(invoice.supported_quantity(), None); + assert_eq!(invoice.signing_pubkey(), recipient_pubkey()); + assert_eq!(invoice.chain(), ChainHash::using_genesis_block(Network::Bitcoin)); + assert_eq!(invoice.amount_msats(), 1000); + assert_eq!(invoice.invoice_request_features(), &InvoiceRequestFeatures::empty()); + assert_eq!(invoice.quantity(), None); + assert_eq!(invoice.payer_id(), payer_pubkey()); + assert_eq!(invoice.payer_note(), None); assert_eq!(invoice.payment_paths(), payment_paths.as_slice()); assert_eq!(invoice.created_at(), now); assert_eq!(invoice.relative_expiry(), DEFAULT_RELATIVE_EXPIRY); #[cfg(feature = "std")] assert!(!invoice.is_expired()); assert_eq!(invoice.payment_hash(), payment_hash); - assert_eq!(invoice.amount_msats(), 1000); - assert_eq!(invoice.fallbacks(), vec![]); - assert_eq!(invoice.features(), &Bolt12InvoiceFeatures::empty()); - assert_eq!(invoice.signing_pubkey(), recipient_pubkey()); - assert!( - merkle::verify_signature( - &invoice.signature, SIGNATURE_TAG, &invoice.bytes, recipient_pubkey() - ).is_ok() - ); + assert!(invoice.fallbacks().is_empty()); + assert_eq!(invoice.invoice_features(), &Bolt12InvoiceFeatures::empty()); + + let message = TaggedHash::from_valid_tlv_stream_bytes(SIGNATURE_TAG, &invoice.bytes); + assert!(merkle::verify_signature(&invoice.signature, &message, recipient_pubkey()).is_ok()); assert_eq!( invoice.as_tlv_stream(), @@ -1115,7 +1665,7 @@ mod tests { metadata: None, currency: None, amount: None, - description: Some(&String::from("foo")), + description: Some(&String::from("")), features: None, absolute_expiry: None, paths: None, @@ -1130,6 +1680,7 @@ mod tests { quantity: None, payer_id: Some(&payer_pubkey()), payer_note: None, + paths: None, }, InvoiceTlvStreamRef { paths: Some(Iterable(payment_paths.iter().map(|(_, path)| path))), @@ -1157,7 +1708,7 @@ mod tests { let future_expiry = Duration::from_secs(u64::max_value()); let past_expiry = Duration::from_secs(0); - if let Err(e) = OfferBuilder::new("foo".into(), recipient_pubkey()) + if let Err(e) = OfferBuilder::new(recipient_pubkey()) .amount_msats(1000) .absolute_expiry(future_expiry) .build().unwrap() @@ -1171,7 +1722,7 @@ mod tests { panic!("error building invoice: {:?}", e); } - match OfferBuilder::new("foo".into(), recipient_pubkey()) + match OfferBuilder::new(recipient_pubkey()) .amount_msats(1000) .absolute_expiry(past_expiry) .build().unwrap() @@ -1193,7 +1744,7 @@ mod tests { let future_expiry = Duration::from_secs(u64::max_value()); let past_expiry = Duration::from_secs(0); - if let Err(e) = RefundBuilder::new("foo".into(), vec![1; 32], payer_pubkey(), 1000).unwrap() + if let Err(e) = RefundBuilder::new(vec![1; 32], payer_pubkey(), 1000).unwrap() .absolute_expiry(future_expiry) .build().unwrap() .respond_with(payment_paths(), payment_hash(), recipient_pubkey()) @@ -1203,7 +1754,7 @@ mod tests { panic!("error building invoice: {:?}", e); } - match RefundBuilder::new("foo".into(), vec![1; 32], payer_pubkey(), 1000).unwrap() + match RefundBuilder::new(vec![1; 32], payer_pubkey(), 1000).unwrap() .absolute_expiry(past_expiry) .build().unwrap() .respond_with(payment_paths(), payment_hash(), recipient_pubkey()) @@ -1217,14 +1768,13 @@ mod tests { #[test] fn builds_invoice_from_offer_using_derived_keys() { - let desc = "foo".to_string(); let node_id = recipient_pubkey(); let expanded_key = ExpandedKey::new(&KeyMaterial([42; 32])); let entropy = FixedEntropy {}; let secp_ctx = Secp256k1::new(); let blinded_path = BlindedPath { - introduction_node_id: pubkey(40), + introduction_node: IntroductionNode::NodeId(pubkey(40)), blinding_point: pubkey(41), blinded_hops: vec![ BlindedHop { blinded_node_id: pubkey(42), encrypted_payload: vec![0; 43] }, @@ -1232,8 +1782,10 @@ mod tests { ], }; + #[cfg(c_bindings)] + use crate::offers::offer::OfferWithDerivedMetadataBuilder as OfferBuilder; let offer = OfferBuilder - ::deriving_signing_pubkey(desc, node_id, &expanded_key, &entropy, &secp_ctx) + ::deriving_signing_pubkey(node_id, &expanded_key, &entropy, &secp_ctx) .amount_msats(1000) .path(blinded_path) .build().unwrap(); @@ -1241,36 +1793,30 @@ mod tests { .build().unwrap() .sign(payer_sign).unwrap(); - if let Err(e) = invoice_request - .verify_and_respond_using_derived_keys_no_std( - payment_paths(), payment_hash(), now(), &expanded_key, &secp_ctx - ) - .unwrap() + if let Err(e) = invoice_request.clone() + .verify(&expanded_key, &secp_ctx).unwrap() + .respond_using_derived_keys_no_std(payment_paths(), payment_hash(), now()).unwrap() .build_and_sign(&secp_ctx) { panic!("error building invoice: {:?}", e); } let expanded_key = ExpandedKey::new(&KeyMaterial([41; 32])); - match invoice_request.verify_and_respond_using_derived_keys_no_std( - payment_paths(), payment_hash(), now(), &expanded_key, &secp_ctx - ) { - Ok(_) => panic!("expected error"), - Err(e) => assert_eq!(e, Bolt12SemanticError::InvalidMetadata), - } + assert!(invoice_request.verify(&expanded_key, &secp_ctx).is_err()); - let desc = "foo".to_string(); let offer = OfferBuilder - ::deriving_signing_pubkey(desc, node_id, &expanded_key, &entropy, &secp_ctx) + ::deriving_signing_pubkey(node_id, &expanded_key, &entropy, &secp_ctx) .amount_msats(1000) + // Omit the path so that node_id is used for the signing pubkey instead of deriving .build().unwrap(); let invoice_request = offer.request_invoice(vec![1; 32], payer_pubkey()).unwrap() .build().unwrap() .sign(payer_sign).unwrap(); - match invoice_request.verify_and_respond_using_derived_keys_no_std( - payment_paths(), payment_hash(), now(), &expanded_key, &secp_ctx - ) { + match invoice_request + .verify(&expanded_key, &secp_ctx).unwrap() + .respond_using_derived_keys_no_std(payment_paths(), payment_hash(), now()) + { Ok(_) => panic!("expected error"), Err(e) => assert_eq!(e, Bolt12SemanticError::InvalidMetadata), } @@ -1282,7 +1828,7 @@ mod tests { let entropy = FixedEntropy {}; let secp_ctx = Secp256k1::new(); - let refund = RefundBuilder::new("foo".into(), vec![1; 32], payer_pubkey(), 1000).unwrap() + let refund = RefundBuilder::new(vec![1; 32], payer_pubkey(), 1000).unwrap() .build().unwrap(); if let Err(e) = refund @@ -1301,7 +1847,7 @@ mod tests { let now = now(); let one_hour = Duration::from_secs(3600); - let invoice = OfferBuilder::new("foo".into(), recipient_pubkey()) + let invoice = OfferBuilder::new(recipient_pubkey()) .amount_msats(1000) .build().unwrap() .request_invoice(vec![1; 32], payer_pubkey()).unwrap() @@ -1317,7 +1863,7 @@ mod tests { assert_eq!(invoice.relative_expiry(), one_hour); assert_eq!(tlv_stream.relative_expiry, Some(one_hour.as_secs() as u32)); - let invoice = OfferBuilder::new("foo".into(), recipient_pubkey()) + let invoice = OfferBuilder::new(recipient_pubkey()) .amount_msats(1000) .build().unwrap() .request_invoice(vec![1; 32], payer_pubkey()).unwrap() @@ -1336,7 +1882,7 @@ mod tests { #[test] fn builds_invoice_with_amount_from_request() { - let invoice = OfferBuilder::new("foo".into(), recipient_pubkey()) + let invoice = OfferBuilder::new(recipient_pubkey()) .amount_msats(1000) .build().unwrap() .request_invoice(vec![1; 32], payer_pubkey()).unwrap() @@ -1353,7 +1899,7 @@ mod tests { #[test] fn builds_invoice_with_quantity_from_request() { - let invoice = OfferBuilder::new("foo".into(), recipient_pubkey()) + let invoice = OfferBuilder::new(recipient_pubkey()) .amount_msats(1000) .supported_quantity(Quantity::Unbounded) .build().unwrap() @@ -1368,7 +1914,7 @@ mod tests { assert_eq!(invoice.amount_msats(), 2000); assert_eq!(tlv_stream.amount, Some(2000)); - match OfferBuilder::new("foo".into(), recipient_pubkey()) + match OfferBuilder::new(recipient_pubkey()) .amount_msats(1000) .supported_quantity(Quantity::Unbounded) .build().unwrap() @@ -1385,12 +1931,12 @@ mod tests { #[test] fn builds_invoice_with_fallback_address() { - let script = Script::new(); - let pubkey = bitcoin::util::key::PublicKey::new(recipient_pubkey()); + let script = ScriptBuf::new(); + let pubkey = bitcoin::key::PublicKey::new(recipient_pubkey()); let x_only_pubkey = XOnlyPublicKey::from_keypair(&recipient_keys()).0; let tweaked_pubkey = TweakedPublicKey::dangerous_assume_tweaked(x_only_pubkey); - let invoice = OfferBuilder::new("foo".into(), recipient_pubkey()) + let invoice = OfferBuilder::new(recipient_pubkey()) .amount_msats(1000) .build().unwrap() .request_invoice(vec![1; 32], payer_pubkey()).unwrap() @@ -1416,11 +1962,11 @@ mod tests { Some(&vec![ FallbackAddress { version: WitnessVersion::V0.to_num(), - program: Vec::from(&script.wscript_hash().into_inner()[..]), + program: Vec::from(script.wscript_hash().to_byte_array()), }, FallbackAddress { version: WitnessVersion::V0.to_num(), - program: Vec::from(&pubkey.wpubkey_hash().unwrap().into_inner()[..]), + program: Vec::from(pubkey.wpubkey_hash().unwrap().to_byte_array()), }, FallbackAddress { version: WitnessVersion::V1.to_num(), @@ -1435,7 +1981,7 @@ mod tests { let mut features = Bolt12InvoiceFeatures::empty(); features.set_basic_mpp_optional(); - let invoice = OfferBuilder::new("foo".into(), recipient_pubkey()) + let invoice = OfferBuilder::new(recipient_pubkey()) .amount_msats(1000) .build().unwrap() .request_invoice(vec![1; 32], payer_pubkey()).unwrap() @@ -1446,13 +1992,13 @@ mod tests { .build().unwrap() .sign(recipient_sign).unwrap(); let (_, _, _, tlv_stream, _) = invoice.as_tlv_stream(); - assert_eq!(invoice.features(), &features); + assert_eq!(invoice.invoice_features(), &features); assert_eq!(tlv_stream.features, Some(&features)); } #[test] fn fails_signing_invoice() { - match OfferBuilder::new("foo".into(), recipient_pubkey()) + match OfferBuilder::new(recipient_pubkey()) .amount_msats(1000) .build().unwrap() .request_invoice(vec![1; 32], payer_pubkey()).unwrap() @@ -1460,13 +2006,13 @@ mod tests { .sign(payer_sign).unwrap() .respond_with_no_std(payment_paths(), payment_hash(), now()).unwrap() .build().unwrap() - .sign(|_| Err(())) + .sign(fail_sign) { Ok(_) => panic!("expected error"), - Err(e) => assert_eq!(e, SignError::Signing(())), + Err(e) => assert_eq!(e, SignError::Signing), } - match OfferBuilder::new("foo".into(), recipient_pubkey()) + match OfferBuilder::new(recipient_pubkey()) .amount_msats(1000) .build().unwrap() .request_invoice(vec![1; 32], payer_pubkey()).unwrap() @@ -1483,7 +2029,7 @@ mod tests { #[test] fn parses_invoice_with_payment_paths() { - let invoice = OfferBuilder::new("foo".into(), recipient_pubkey()) + let invoice = OfferBuilder::new(recipient_pubkey()) .amount_msats(1000) .build().unwrap() .request_invoice(vec![1; 32], payer_pubkey()).unwrap() @@ -1538,7 +2084,7 @@ mod tests { #[test] fn parses_invoice_with_created_at() { - let invoice = OfferBuilder::new("foo".into(), recipient_pubkey()) + let invoice = OfferBuilder::new(recipient_pubkey()) .amount_msats(1000) .build().unwrap() .request_invoice(vec![1; 32], payer_pubkey()).unwrap() @@ -1568,7 +2114,7 @@ mod tests { #[test] fn parses_invoice_with_relative_expiry() { - let invoice = OfferBuilder::new("foo".into(), recipient_pubkey()) + let invoice = OfferBuilder::new(recipient_pubkey()) .amount_msats(1000) .build().unwrap() .request_invoice(vec![1; 32], payer_pubkey()).unwrap() @@ -1590,7 +2136,7 @@ mod tests { #[test] fn parses_invoice_with_payment_hash() { - let invoice = OfferBuilder::new("foo".into(), recipient_pubkey()) + let invoice = OfferBuilder::new(recipient_pubkey()) .amount_msats(1000) .build().unwrap() .request_invoice(vec![1; 32], payer_pubkey()).unwrap() @@ -1620,7 +2166,7 @@ mod tests { #[test] fn parses_invoice_with_amount() { - let invoice = OfferBuilder::new("foo".into(), recipient_pubkey()) + let invoice = OfferBuilder::new(recipient_pubkey()) .amount_msats(1000) .build().unwrap() .request_invoice(vec![1; 32], payer_pubkey()).unwrap() @@ -1648,7 +2194,7 @@ mod tests { #[test] fn parses_invoice_with_allow_mpp() { - let invoice = OfferBuilder::new("foo".into(), recipient_pubkey()) + let invoice = OfferBuilder::new(recipient_pubkey()) .amount_msats(1000) .build().unwrap() .request_invoice(vec![1; 32], payer_pubkey()).unwrap() @@ -1666,7 +2212,7 @@ mod tests { Ok(invoice) => { let mut features = Bolt12InvoiceFeatures::empty(); features.set_basic_mpp_optional(); - assert_eq!(invoice.features(), &features); + assert_eq!(invoice.invoice_features(), &features); }, Err(e) => panic!("error parsing invoice: {:?}", e), } @@ -1674,27 +2220,33 @@ mod tests { #[test] fn parses_invoice_with_fallback_address() { - let script = Script::new(); - let pubkey = bitcoin::util::key::PublicKey::new(recipient_pubkey()); + let script = ScriptBuf::new(); + let pubkey = bitcoin::key::PublicKey::new(recipient_pubkey()); let x_only_pubkey = XOnlyPublicKey::from_keypair(&recipient_keys()).0; let tweaked_pubkey = TweakedPublicKey::dangerous_assume_tweaked(x_only_pubkey); - let offer = OfferBuilder::new("foo".into(), recipient_pubkey()) + let offer = OfferBuilder::new(recipient_pubkey()) .amount_msats(1000) .build().unwrap(); let invoice_request = offer .request_invoice(vec![1; 32], payer_pubkey()).unwrap() .build().unwrap() .sign(payer_sign).unwrap(); - let mut unsigned_invoice = invoice_request - .respond_with_no_std(payment_paths(), payment_hash(), now()).unwrap() + #[cfg(not(c_bindings))] + let invoice_builder = invoice_request + .respond_with_no_std(payment_paths(), payment_hash(), now()).unwrap(); + #[cfg(c_bindings)] + let mut invoice_builder = invoice_request + .respond_with_no_std(payment_paths(), payment_hash(), now()).unwrap(); + let invoice_builder = invoice_builder .fallback_v0_p2wsh(&script.wscript_hash()) .fallback_v0_p2wpkh(&pubkey.wpubkey_hash().unwrap()) - .fallback_v1_p2tr_tweaked(&tweaked_pubkey) - .build().unwrap(); + .fallback_v1_p2tr_tweaked(&tweaked_pubkey); + #[cfg(not(c_bindings))] + let mut invoice_builder = invoice_builder; // Only standard addresses will be included. - let fallbacks = unsigned_invoice.invoice.fields_mut().fallbacks.as_mut().unwrap(); + let fallbacks = invoice_builder.invoice.fields_mut().fallbacks.as_mut().unwrap(); // Non-standard addresses fallbacks.push(FallbackAddress { version: 1, program: vec![0u8; 41] }); fallbacks.push(FallbackAddress { version: 2, program: vec![0u8; 1] }); @@ -1703,32 +2255,22 @@ mod tests { fallbacks.push(FallbackAddress { version: 1, program: vec![0u8; 33] }); fallbacks.push(FallbackAddress { version: 2, program: vec![0u8; 40] }); - let invoice = unsigned_invoice.sign(recipient_sign).unwrap(); + let invoice = invoice_builder.build().unwrap().sign(recipient_sign).unwrap(); let mut buffer = Vec::new(); invoice.write(&mut buffer).unwrap(); match Bolt12Invoice::try_from(buffer) { Ok(invoice) => { + let v1_witness_program = WitnessProgram::new(WitnessVersion::V1, vec![0u8; 33]).unwrap(); + let v2_witness_program = WitnessProgram::new(WitnessVersion::V2, vec![0u8; 40]).unwrap(); assert_eq!( invoice.fallbacks(), vec![ Address::p2wsh(&script, Network::Bitcoin), Address::p2wpkh(&pubkey, Network::Bitcoin).unwrap(), Address::p2tr_tweaked(tweaked_pubkey, Network::Bitcoin), - Address { - payload: Payload::WitnessProgram { - version: WitnessVersion::V1, - program: vec![0u8; 33], - }, - network: Network::Bitcoin, - }, - Address { - payload: Payload::WitnessProgram { - version: WitnessVersion::V2, - program: vec![0u8; 40], - }, - network: Network::Bitcoin, - }, + Address::new(Network::Bitcoin, Payload::WitnessProgram(v1_witness_program)), + Address::new(Network::Bitcoin, Payload::WitnessProgram(v2_witness_program)), ], ); }, @@ -1738,7 +2280,7 @@ mod tests { #[test] fn parses_invoice_with_node_id() { - let invoice = OfferBuilder::new("foo".into(), recipient_pubkey()) + let invoice = OfferBuilder::new(recipient_pubkey()) .amount_msats(1000) .build().unwrap() .request_invoice(vec![1; 32], payer_pubkey()).unwrap() @@ -1777,10 +2319,85 @@ mod tests { } } + #[test] + fn parses_invoice_with_node_id_from_blinded_path() { + let paths = vec![ + BlindedPath { + introduction_node: IntroductionNode::NodeId(pubkey(40)), + blinding_point: pubkey(41), + blinded_hops: vec![ + BlindedHop { blinded_node_id: pubkey(43), encrypted_payload: vec![0; 43] }, + BlindedHop { blinded_node_id: pubkey(44), encrypted_payload: vec![0; 44] }, + ], + }, + BlindedPath { + introduction_node: IntroductionNode::NodeId(pubkey(40)), + blinding_point: pubkey(41), + blinded_hops: vec![ + BlindedHop { blinded_node_id: pubkey(45), encrypted_payload: vec![0; 45] }, + BlindedHop { blinded_node_id: pubkey(46), encrypted_payload: vec![0; 46] }, + ], + }, + ]; + + let blinded_node_id_sign = |message: &UnsignedBolt12Invoice| { + let secp_ctx = Secp256k1::new(); + let keys = Keypair::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[46; 32]).unwrap()); + Ok(secp_ctx.sign_schnorr_no_aux_rand(message.as_ref().as_digest(), &keys)) + }; + + let invoice = OfferBuilder::new(recipient_pubkey()) + .clear_signing_pubkey() + .amount_msats(1000) + .path(paths[0].clone()) + .path(paths[1].clone()) + .build().unwrap() + .request_invoice(vec![1; 32], payer_pubkey()).unwrap() + .build().unwrap() + .sign(payer_sign).unwrap() + .respond_with_no_std_using_signing_pubkey( + payment_paths(), payment_hash(), now(), pubkey(46) + ).unwrap() + .build().unwrap() + .sign(blinded_node_id_sign).unwrap(); + + let mut buffer = Vec::new(); + invoice.write(&mut buffer).unwrap(); + + if let Err(e) = Bolt12Invoice::try_from(buffer) { + panic!("error parsing invoice: {:?}", e); + } + + let invoice = OfferBuilder::new(recipient_pubkey()) + .clear_signing_pubkey() + .amount_msats(1000) + .path(paths[0].clone()) + .path(paths[1].clone()) + .build().unwrap() + .request_invoice(vec![1; 32], payer_pubkey()).unwrap() + .build().unwrap() + .sign(payer_sign).unwrap() + .respond_with_no_std_using_signing_pubkey( + payment_paths(), payment_hash(), now(), recipient_pubkey() + ).unwrap() + .build().unwrap() + .sign(recipient_sign).unwrap(); + + let mut buffer = Vec::new(); + invoice.write(&mut buffer).unwrap(); + + match Bolt12Invoice::try_from(buffer) { + Ok(_) => panic!("expected error"), + Err(e) => { + assert_eq!(e, Bolt12ParseError::InvalidSemantics(Bolt12SemanticError::InvalidSigningPubkey)); + }, + } + } + #[test] fn fails_parsing_invoice_without_signature() { let mut buffer = Vec::new(); - OfferBuilder::new("foo".into(), recipient_pubkey()) + OfferBuilder::new(recipient_pubkey()) .amount_msats(1000) .build().unwrap() .request_invoice(vec![1; 32], payer_pubkey()).unwrap() @@ -1788,7 +2405,7 @@ mod tests { .sign(payer_sign).unwrap() .respond_with_no_std(payment_paths(), payment_hash(), now()).unwrap() .build().unwrap() - .invoice + .contents .write(&mut buffer).unwrap(); match Bolt12Invoice::try_from(buffer) { @@ -1799,7 +2416,7 @@ mod tests { #[test] fn fails_parsing_invoice_with_invalid_signature() { - let mut invoice = OfferBuilder::new("foo".into(), recipient_pubkey()) + let mut invoice = OfferBuilder::new(recipient_pubkey()) .amount_msats(1000) .build().unwrap() .request_invoice(vec![1; 32], payer_pubkey()).unwrap() @@ -1824,7 +2441,7 @@ mod tests { #[test] fn fails_parsing_invoice_with_extra_tlv_records() { - let invoice = OfferBuilder::new("foo".into(), recipient_pubkey()) + let invoice = OfferBuilder::new(recipient_pubkey()) .amount_msats(1000) .build().unwrap() .request_invoice(vec![1; 32], payer_pubkey()).unwrap()