Invoice parsing tests
[rust-lightning] / lightning / src / offers / invoice.rs
index 1ca2c06cefd03ca7400b6ca7b6fcf707992d400d..99a97368d92408f735db7509012bb44adc01a680 100644 (file)
@@ -529,6 +529,12 @@ impl Writeable for Invoice {
        }
 }
 
+impl Writeable for InvoiceContents {
+       fn write<W: Writer>(&self, writer: &mut W) -> Result<(), io::Error> {
+               self.as_tlv_stream().write(writer)
+       }
+}
+
 impl TryFrom<Vec<u8>> for Invoice {
        type Error = ParseError;
 
@@ -581,7 +587,7 @@ impl_writeable!(BlindedPayInfo, {
 });
 
 /// Wire representation for an on-chain fallback address.
-#[derive(Debug, PartialEq)]
+#[derive(Clone, Debug, PartialEq)]
 pub(super) struct FallbackAddress {
        version: u8,
        program: Vec<u8>,
@@ -727,27 +733,28 @@ impl TryFrom<PartialInvoiceTlvStream> for InvoiceContents {
 
 #[cfg(test)]
 mod tests {
-       use super::{DEFAULT_RELATIVE_EXPIRY, BlindedPayInfo, FallbackAddress, Invoice, InvoiceTlvStreamRef, SIGNATURE_TAG};
+       use super::{DEFAULT_RELATIVE_EXPIRY, BlindedPayInfo, FallbackAddress, FullInvoiceTlvStreamRef, Invoice, InvoiceTlvStreamRef, SIGNATURE_TAG};
 
        use bitcoin::blockdata::script::Script;
        use bitcoin::hashes::Hash;
        use bitcoin::network::constants::Network;
        use bitcoin::secp256k1::{KeyPair, Message, PublicKey, Secp256k1, SecretKey, XOnlyPublicKey, self};
        use bitcoin::secp256k1::schnorr::Signature;
-       use bitcoin::util::address::{Address, WitnessVersion};
+       use bitcoin::util::address::{Address, Payload, WitnessVersion};
        use bitcoin::util::schnorr::TweakedPublicKey;
        use core::convert::{Infallible, TryFrom};
        use core::time::Duration;
        use crate::ln::PaymentHash;
+       use crate::ln::msgs::DecodeError;
        use crate::ln::features::{BlindedHopFeatures, Bolt12InvoiceFeatures};
        use crate::offers::invoice_request::InvoiceRequestTlvStreamRef;
        use crate::offers::merkle::{SignError, SignatureTlvStreamRef, self};
        use crate::offers::offer::{OfferBuilder, OfferTlvStreamRef};
-       use crate::offers::parse::SemanticError;
+       use crate::offers::parse::{ParseError, SemanticError};
        use crate::offers::payer::PayerTlvStreamRef;
        use crate::offers::refund::RefundBuilder;
        use crate::onion_message::{BlindedHop, BlindedPath};
-       use crate::util::ser::{Iterable, Writeable};
+       use crate::util::ser::{BigSize, Iterable, Writeable};
 
        fn payer_keys() -> KeyPair {
                let secp_ctx = Secp256k1::new();
@@ -788,6 +795,22 @@ mod tests {
                SecretKey::from_slice(&[byte; 32]).unwrap()
        }
 
+       trait ToBytes {
+               fn to_bytes(&self) -> Vec<u8>;
+       }
+
+       impl<'a> ToBytes for FullInvoiceTlvStreamRef<'a> {
+               fn to_bytes(&self) -> Vec<u8> {
+                       let mut buffer = Vec::new();
+                       self.0.write(&mut buffer).unwrap();
+                       self.1.write(&mut buffer).unwrap();
+                       self.2.write(&mut buffer).unwrap();
+                       self.3.write(&mut buffer).unwrap();
+                       self.4.write(&mut buffer).unwrap();
+                       buffer
+               }
+       }
+
        fn payment_paths() -> Vec<(BlindedPath, BlindedPayInfo)> {
                let paths = vec![
                        BlindedPath {
@@ -1174,4 +1197,369 @@ mod tests {
                        Err(e) => assert_eq!(e, SignError::Verification(secp256k1::Error::InvalidSignature)),
                }
        }
+
+       #[test]
+       fn parses_invoice_with_payment_paths() {
+               let invoice = OfferBuilder::new("foo".into(), recipient_pubkey())
+                       .amount_msats(1000)
+                       .build().unwrap()
+                       .request_invoice(vec![1; 32], payer_pubkey()).unwrap()
+                       .build().unwrap()
+                       .sign(payer_sign).unwrap()
+                       .respond_with(payment_paths(), payment_hash(), now()).unwrap()
+                       .build().unwrap()
+                       .sign(recipient_sign).unwrap();
+
+               let mut buffer = Vec::new();
+               invoice.write(&mut buffer).unwrap();
+
+               if let Err(e) = Invoice::try_from(buffer) {
+                       panic!("error parsing invoice: {:?}", e);
+               }
+
+               let mut tlv_stream = invoice.as_tlv_stream();
+               tlv_stream.3.paths = None;
+
+               match Invoice::try_from(tlv_stream.to_bytes()) {
+                       Ok(_) => panic!("expected error"),
+                       Err(e) => assert_eq!(e, ParseError::InvalidSemantics(SemanticError::MissingPaths)),
+               }
+
+               let mut tlv_stream = invoice.as_tlv_stream();
+               tlv_stream.3.blindedpay = None;
+
+               match Invoice::try_from(tlv_stream.to_bytes()) {
+                       Ok(_) => panic!("expected error"),
+                       Err(e) => assert_eq!(e, ParseError::InvalidSemantics(SemanticError::InvalidPayInfo)),
+               }
+
+               let empty_payment_paths = vec![];
+               let mut tlv_stream = invoice.as_tlv_stream();
+               tlv_stream.3.paths = Some(Iterable(empty_payment_paths.iter().map(|(path, _)| path)));
+
+               match Invoice::try_from(tlv_stream.to_bytes()) {
+                       Ok(_) => panic!("expected error"),
+                       Err(e) => assert_eq!(e, ParseError::InvalidSemantics(SemanticError::MissingPaths)),
+               }
+
+               let mut payment_paths = payment_paths();
+               payment_paths.pop();
+               let mut tlv_stream = invoice.as_tlv_stream();
+               tlv_stream.3.blindedpay = Some(Iterable(payment_paths.iter().map(|(_, payinfo)| payinfo)));
+
+               match Invoice::try_from(tlv_stream.to_bytes()) {
+                       Ok(_) => panic!("expected error"),
+                       Err(e) => assert_eq!(e, ParseError::InvalidSemantics(SemanticError::InvalidPayInfo)),
+               }
+       }
+
+       #[test]
+       fn parses_invoice_with_created_at() {
+               let invoice = OfferBuilder::new("foo".into(), recipient_pubkey())
+                       .amount_msats(1000)
+                       .build().unwrap()
+                       .request_invoice(vec![1; 32], payer_pubkey()).unwrap()
+                       .build().unwrap()
+                       .sign(payer_sign).unwrap()
+                       .respond_with(payment_paths(), payment_hash(), now()).unwrap()
+                       .build().unwrap()
+                       .sign(recipient_sign).unwrap();
+
+               let mut buffer = Vec::new();
+               invoice.write(&mut buffer).unwrap();
+
+               if let Err(e) = Invoice::try_from(buffer) {
+                       panic!("error parsing invoice: {:?}", e);
+               }
+
+               let mut tlv_stream = invoice.as_tlv_stream();
+               tlv_stream.3.created_at = None;
+
+               match Invoice::try_from(tlv_stream.to_bytes()) {
+                       Ok(_) => panic!("expected error"),
+                       Err(e) => {
+                               assert_eq!(e, ParseError::InvalidSemantics(SemanticError::MissingCreationTime));
+                       },
+               }
+       }
+
+       #[test]
+       fn parses_invoice_with_relative_expiry() {
+               let invoice = OfferBuilder::new("foo".into(), recipient_pubkey())
+                       .amount_msats(1000)
+                       .build().unwrap()
+                       .request_invoice(vec![1; 32], payer_pubkey()).unwrap()
+                       .build().unwrap()
+                       .sign(payer_sign).unwrap()
+                       .respond_with(payment_paths(), payment_hash(), now()).unwrap()
+                       .relative_expiry(3600)
+                       .build().unwrap()
+                       .sign(recipient_sign).unwrap();
+
+               let mut buffer = Vec::new();
+               invoice.write(&mut buffer).unwrap();
+
+               match Invoice::try_from(buffer) {
+                       Ok(invoice) => assert_eq!(invoice.relative_expiry(), Duration::from_secs(3600)),
+                       Err(e) => panic!("error parsing invoice: {:?}", e),
+               }
+       }
+
+       #[test]
+       fn parses_invoice_with_payment_hash() {
+               let invoice = OfferBuilder::new("foo".into(), recipient_pubkey())
+                       .amount_msats(1000)
+                       .build().unwrap()
+                       .request_invoice(vec![1; 32], payer_pubkey()).unwrap()
+                       .build().unwrap()
+                       .sign(payer_sign).unwrap()
+                       .respond_with(payment_paths(), payment_hash(), now()).unwrap()
+                       .build().unwrap()
+                       .sign(recipient_sign).unwrap();
+
+               let mut buffer = Vec::new();
+               invoice.write(&mut buffer).unwrap();
+
+               if let Err(e) = Invoice::try_from(buffer) {
+                       panic!("error parsing invoice: {:?}", e);
+               }
+
+               let mut tlv_stream = invoice.as_tlv_stream();
+               tlv_stream.3.payment_hash = None;
+
+               match Invoice::try_from(tlv_stream.to_bytes()) {
+                       Ok(_) => panic!("expected error"),
+                       Err(e) => {
+                               assert_eq!(e, ParseError::InvalidSemantics(SemanticError::MissingPaymentHash));
+                       },
+               }
+       }
+
+       #[test]
+       fn parses_invoice_with_amount() {
+               let invoice = OfferBuilder::new("foo".into(), recipient_pubkey())
+                       .amount_msats(1000)
+                       .build().unwrap()
+                       .request_invoice(vec![1; 32], payer_pubkey()).unwrap()
+                       .build().unwrap()
+                       .sign(payer_sign).unwrap()
+                       .respond_with(payment_paths(), payment_hash(), now()).unwrap()
+                       .build().unwrap()
+                       .sign(recipient_sign).unwrap();
+
+               let mut buffer = Vec::new();
+               invoice.write(&mut buffer).unwrap();
+
+               if let Err(e) = Invoice::try_from(buffer) {
+                       panic!("error parsing invoice: {:?}", e);
+               }
+
+               let mut tlv_stream = invoice.as_tlv_stream();
+               tlv_stream.3.amount = None;
+
+               match Invoice::try_from(tlv_stream.to_bytes()) {
+                       Ok(_) => panic!("expected error"),
+                       Err(e) => assert_eq!(e, ParseError::InvalidSemantics(SemanticError::MissingAmount)),
+               }
+       }
+
+       #[test]
+       fn parses_invoice_with_allow_mpp() {
+               let invoice = OfferBuilder::new("foo".into(), recipient_pubkey())
+                       .amount_msats(1000)
+                       .build().unwrap()
+                       .request_invoice(vec![1; 32], payer_pubkey()).unwrap()
+                       .build().unwrap()
+                       .sign(payer_sign).unwrap()
+                       .respond_with(payment_paths(), payment_hash(), now()).unwrap()
+                       .allow_mpp()
+                       .build().unwrap()
+                       .sign(recipient_sign).unwrap();
+
+               let mut buffer = Vec::new();
+               invoice.write(&mut buffer).unwrap();
+
+               match Invoice::try_from(buffer) {
+                       Ok(invoice) => {
+                               let mut features = Bolt12InvoiceFeatures::empty();
+                               features.set_basic_mpp_optional();
+                               assert_eq!(invoice.features(), &features);
+                       },
+                       Err(e) => panic!("error parsing invoice: {:?}", e),
+               }
+       }
+
+       #[test]
+       fn parses_invoice_with_fallback_address() {
+               let script = Script::new();
+               let pubkey = bitcoin::util::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())
+                       .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(payment_paths(), payment_hash(), now()).unwrap()
+                       .fallback_v0_p2wsh(&script.wscript_hash())
+                       .fallback_v0_p2wpkh(&pubkey.wpubkey_hash().unwrap())
+                       .fallback_v1_p2tr_tweaked(&tweaked_pubkey)
+                       .build().unwrap();
+
+               // Only standard addresses will be included.
+               let mut fallbacks = unsigned_invoice.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] });
+               fallbacks.push(FallbackAddress { version: 17, program: vec![0u8; 40] });
+               // Standard address
+               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 mut buffer = Vec::new();
+               invoice.write(&mut buffer).unwrap();
+
+               match Invoice::try_from(buffer) {
+                       Ok(invoice) => {
+                               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,
+                                               },
+                                       ],
+                               );
+                       },
+                       Err(e) => panic!("error parsing invoice: {:?}", e),
+               }
+       }
+
+       #[test]
+       fn parses_invoice_with_node_id() {
+               let invoice = OfferBuilder::new("foo".into(), recipient_pubkey())
+                       .amount_msats(1000)
+                       .build().unwrap()
+                       .request_invoice(vec![1; 32], payer_pubkey()).unwrap()
+                       .build().unwrap()
+                       .sign(payer_sign).unwrap()
+                       .respond_with(payment_paths(), payment_hash(), now()).unwrap()
+                       .build().unwrap()
+                       .sign(recipient_sign).unwrap();
+
+               let mut buffer = Vec::new();
+               invoice.write(&mut buffer).unwrap();
+
+               if let Err(e) = Invoice::try_from(buffer) {
+                       panic!("error parsing invoice: {:?}", e);
+               }
+
+               let mut tlv_stream = invoice.as_tlv_stream();
+               tlv_stream.3.node_id = None;
+
+               match Invoice::try_from(tlv_stream.to_bytes()) {
+                       Ok(_) => panic!("expected error"),
+                       Err(e) => {
+                               assert_eq!(e, ParseError::InvalidSemantics(SemanticError::MissingSigningPubkey));
+                       },
+               }
+
+               let invalid_pubkey = payer_pubkey();
+               let mut tlv_stream = invoice.as_tlv_stream();
+               tlv_stream.3.node_id = Some(&invalid_pubkey);
+
+               match Invoice::try_from(tlv_stream.to_bytes()) {
+                       Ok(_) => panic!("expected error"),
+                       Err(e) => {
+                               assert_eq!(e, ParseError::InvalidSemantics(SemanticError::InvalidSigningPubkey));
+                       },
+               }
+       }
+
+       #[test]
+       fn fails_parsing_invoice_without_signature() {
+               let mut buffer = Vec::new();
+               OfferBuilder::new("foo".into(), recipient_pubkey())
+                       .amount_msats(1000)
+                       .build().unwrap()
+                       .request_invoice(vec![1; 32], payer_pubkey()).unwrap()
+                       .build().unwrap()
+                       .sign(payer_sign).unwrap()
+                       .respond_with(payment_paths(), payment_hash(), now()).unwrap()
+                       .build().unwrap()
+                       .invoice
+                       .write(&mut buffer).unwrap();
+
+               match Invoice::try_from(buffer) {
+                       Ok(_) => panic!("expected error"),
+                       Err(e) => assert_eq!(e, ParseError::InvalidSemantics(SemanticError::MissingSignature)),
+               }
+       }
+
+       #[test]
+       fn fails_parsing_invoice_with_invalid_signature() {
+               let mut invoice = OfferBuilder::new("foo".into(), recipient_pubkey())
+                       .amount_msats(1000)
+                       .build().unwrap()
+                       .request_invoice(vec![1; 32], payer_pubkey()).unwrap()
+                       .build().unwrap()
+                       .sign(payer_sign).unwrap()
+                       .respond_with(payment_paths(), payment_hash(), now()).unwrap()
+                       .build().unwrap()
+                       .sign(recipient_sign).unwrap();
+               let last_signature_byte = invoice.bytes.last_mut().unwrap();
+               *last_signature_byte = last_signature_byte.wrapping_add(1);
+
+               let mut buffer = Vec::new();
+               invoice.write(&mut buffer).unwrap();
+
+               match Invoice::try_from(buffer) {
+                       Ok(_) => panic!("expected error"),
+                       Err(e) => {
+                               assert_eq!(e, ParseError::InvalidSignature(secp256k1::Error::InvalidSignature));
+                       },
+               }
+       }
+
+       #[test]
+       fn fails_parsing_invoice_with_extra_tlv_records() {
+               let invoice = OfferBuilder::new("foo".into(), recipient_pubkey())
+                       .amount_msats(1000)
+                       .build().unwrap()
+                       .request_invoice(vec![1; 32], payer_pubkey()).unwrap()
+                       .build().unwrap()
+                       .sign(payer_sign).unwrap()
+                       .respond_with(payment_paths(), payment_hash(), now()).unwrap()
+                       .build().unwrap()
+                       .sign(recipient_sign).unwrap();
+
+               let mut encoded_invoice = Vec::new();
+               invoice.write(&mut encoded_invoice).unwrap();
+               BigSize(1002).write(&mut encoded_invoice).unwrap();
+               BigSize(32).write(&mut encoded_invoice).unwrap();
+               [42u8; 32].write(&mut encoded_invoice).unwrap();
+
+               match Invoice::try_from(encoded_invoice) {
+                       Ok(_) => panic!("expected error"),
+                       Err(e) => assert_eq!(e, ParseError::Decode(DecodeError::InvalidValue)),
+               }
+       }
 }