//!
//! [`InvoiceRequest`]: crate::offers::invoice_request::InvoiceRequest
//! [`Offer`]: crate::offers::offer::Offer
+//!
+//! ```ignore
+//! extern crate bitcoin;
+//! extern crate core;
+//! extern crate lightning;
+//!
+//! use core::convert::TryFrom;
+//! use core::time::Duration;
+//!
+//! use bitcoin::network::constants::Network;
+//! use bitcoin::secp256k1::{KeyPair, PublicKey, Secp256k1, SecretKey};
+//! use lightning::offers::parse::ParseError;
+//! use lightning::offers::refund::{Refund, RefundBuilder};
+//! use lightning::util::ser::{Readable, Writeable};
+//!
+//! # use lightning::onion_message::BlindedPath;
+//! # #[cfg(feature = "std")]
+//! # use std::time::SystemTime;
+//! #
+//! # fn create_blinded_path() -> BlindedPath { unimplemented!() }
+//! # fn create_another_blinded_path() -> BlindedPath { unimplemented!() }
+//! #
+//! # #[cfg(feature = "std")]
+//! # fn build() -> Result<(), ParseError> {
+//! let secp_ctx = Secp256k1::new();
+//! let keys = KeyPair::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[42; 32]).unwrap());
+//! let pubkey = PublicKey::from(keys);
+//!
+//! let expiration = SystemTime::now() + Duration::from_secs(24 * 60 * 60);
+//! let refund = RefundBuilder::new("coffee, large".to_string(), vec![1; 32], pubkey, 20_000)?
+//! .absolute_expiry(expiration.duration_since(SystemTime::UNIX_EPOCH).unwrap())
+//! .issuer("Foo Bar".to_string())
+//! .path(create_blinded_path())
+//! .path(create_another_blinded_path())
+//! .chain(Network::Bitcoin)
+//! .payer_note("refund for order #12345".to_string())
+//! .build()?;
+//!
+//! // Encode as a bech32 string for use in a QR code.
+//! let encoded_refund = refund.to_string();
+//!
+//! // Parse from a bech32 string after scanning from a QR code.
+//! let refund = encoded_refund.parse::<Refund>()?;
+//!
+//! // Encode refund as raw bytes.
+//! let mut bytes = Vec::new();
+//! refund.write(&mut bytes).unwrap();
+//!
+//! // Decode raw bytes into an refund.
+//! let refund = Refund::try_from(bytes)?;
+//! # Ok(())
+//! # }
+//! ```
use bitcoin::blockdata::constants::ChainHash;
use bitcoin::network::constants::Network;
use bitcoin::secp256k1::PublicKey;
use core::convert::TryFrom;
+use core::str::FromStr;
use core::time::Duration;
use crate::io;
use crate::ln::features::InvoiceRequestFeatures;
use crate::ln::msgs::{DecodeError, MAX_VALUE_MSAT};
-use crate::offers::invoice_request::InvoiceRequestTlvStream;
-use crate::offers::offer::OfferTlvStream;
-use crate::offers::parse::{ParseError, ParsedMessage, SemanticError};
-use crate::offers::payer::{PayerContents, PayerTlvStream};
+use crate::offers::invoice_request::{InvoiceRequestTlvStream, InvoiceRequestTlvStreamRef};
+use crate::offers::offer::{OfferTlvStream, OfferTlvStreamRef};
+use crate::offers::parse::{Bech32Encode, ParseError, ParsedMessage, SemanticError};
+use crate::offers::payer::{PayerContents, PayerTlvStream, PayerTlvStreamRef};
use crate::onion_message::BlindedPath;
-use crate::util::ser::SeekReadable;
+use crate::util::ser::{SeekReadable, WithoutLength, Writeable, Writer};
use crate::util::string::PrintableString;
use crate::prelude::*;
#[cfg(feature = "std")]
use std::time::SystemTime;
+/// Builds a [`Refund`] for the "offer for money" flow.
+///
+/// See [module-level documentation] for usage.
+///
+/// [module-level documentation]: self
+pub struct RefundBuilder {
+ refund: RefundContents,
+}
+
+impl RefundBuilder {
+ /// Creates a new builder for a refund using the [`Refund::payer_id`] for signing invoices. Use
+ /// a different pubkey per refund to avoid correlating refunds.
+ ///
+ /// Additionally, sets the required [`Refund::description`], [`Refund::metadata`], and
+ /// [`Refund::amount_msats`].
+ pub fn new(
+ description: String, metadata: Vec<u8>, payer_id: PublicKey, amount_msats: u64
+ ) -> Result<Self, SemanticError> {
+ if amount_msats > MAX_VALUE_MSAT {
+ return Err(SemanticError::InvalidAmount);
+ }
+
+ let refund = RefundContents {
+ payer: PayerContents(metadata), metadata: None, description, absolute_expiry: None,
+ issuer: None, paths: None, chain: None, amount_msats,
+ features: InvoiceRequestFeatures::empty(), payer_id, payer_note: None,
+ };
+
+ Ok(RefundBuilder { refund })
+ }
+
+ /// Sets the [`Refund::absolute_expiry`] as seconds since the Unix epoch. Any expiry that has
+ /// already passed is valid and can be checked for using [`Refund::is_expired`].
+ ///
+ /// Successive calls to this method will override the previous setting.
+ pub fn absolute_expiry(mut self, absolute_expiry: Duration) -> Self {
+ self.refund.absolute_expiry = Some(absolute_expiry);
+ self
+ }
+
+ /// Sets the [`Refund::issuer`].
+ ///
+ /// Successive calls to this method will override the previous setting.
+ pub fn issuer(mut self, issuer: String) -> Self {
+ self.refund.issuer = Some(issuer);
+ self
+ }
+
+ /// Adds a blinded path to [`Refund::paths`]. Must include at least one path if only connected
+ /// by private channels or if [`Refund::payer_id`] is not a public node id.
+ ///
+ /// Successive calls to this method will add another blinded path. Caller is responsible for not
+ /// adding duplicate paths.
+ pub fn path(mut self, path: BlindedPath) -> Self {
+ self.refund.paths.get_or_insert_with(Vec::new).push(path);
+ self
+ }
+
+ /// Sets the [`Refund::chain`] of the given [`Network`] for paying an invoice. If not
+ /// called, [`Network::Bitcoin`] is assumed.
+ ///
+ /// Successive calls to this method will override the previous setting.
+ pub fn chain(mut self, network: Network) -> Self {
+ self.refund.chain = Some(ChainHash::using_genesis_block(network));
+ self
+ }
+
+ /// Sets the [`Refund::payer_note`].
+ ///
+ /// Successive calls to this method will override the previous setting.
+ pub fn payer_note(mut self, payer_note: String) -> Self {
+ self.refund.payer_note = Some(payer_note);
+ self
+ }
+
+ /// Builds a [`Refund`] after checking for valid semantics.
+ pub fn build(mut self) -> Result<Refund, SemanticError> {
+ if self.refund.chain() == self.refund.implied_chain() {
+ self.refund.chain = None;
+ }
+
+ let mut bytes = Vec::new();
+ self.refund.write(&mut bytes).unwrap();
+
+ Ok(Refund {
+ bytes,
+ contents: self.refund,
+ })
+ }
+}
+
+#[cfg(test)]
+impl RefundBuilder {
+ fn features_unchecked(mut self, features: InvoiceRequestFeatures) -> Self {
+ self.refund.features = features;
+ self
+ }
+}
+
/// A `Refund` is a request to send an `Invoice` without a preceding [`Offer`].
///
/// Typically, after an invoice is paid, the recipient may publish a refund allowing the sender to
/// A chain that the refund is valid for.
pub fn chain(&self) -> ChainHash {
- self.contents.chain.unwrap_or_else(|| ChainHash::using_genesis_block(Network::Bitcoin))
+ self.contents.chain.unwrap_or_else(|| self.contents.implied_chain())
}
/// The amount to refund in msats (i.e., the minimum lightning-payable unit for [`chain`]).
pub fn payer_note(&self) -> Option<PrintableString> {
self.contents.payer_note.as_ref().map(|payer_note| PrintableString(payer_note.as_str()))
}
+
+ #[cfg(test)]
+ fn as_tlv_stream(&self) -> RefundTlvStreamRef {
+ self.contents.as_tlv_stream()
+ }
+}
+
+impl AsRef<[u8]> for Refund {
+ fn as_ref(&self) -> &[u8] {
+ &self.bytes
+ }
+}
+
+impl RefundContents {
+ fn chain(&self) -> ChainHash {
+ self.chain.unwrap_or_else(|| self.implied_chain())
+ }
+
+ pub fn implied_chain(&self) -> ChainHash {
+ ChainHash::using_genesis_block(Network::Bitcoin)
+ }
+
+ pub(super) fn as_tlv_stream(&self) -> RefundTlvStreamRef {
+ let payer = PayerTlvStreamRef {
+ metadata: Some(&self.payer.0),
+ };
+
+ let offer = OfferTlvStreamRef {
+ chains: None,
+ metadata: self.metadata.as_ref(),
+ currency: None,
+ amount: None,
+ description: Some(&self.description),
+ features: None,
+ absolute_expiry: self.absolute_expiry.map(|duration| duration.as_secs()),
+ paths: self.paths.as_ref(),
+ issuer: self.issuer.as_ref(),
+ quantity_max: None,
+ node_id: None,
+ };
+
+ let features = {
+ if self.features == InvoiceRequestFeatures::empty() { None }
+ else { Some(&self.features) }
+ };
+
+ let invoice_request = InvoiceRequestTlvStreamRef {
+ chain: self.chain.as_ref(),
+ amount: Some(self.amount_msats),
+ features,
+ quantity: None,
+ payer_id: Some(&self.payer_id),
+ payer_note: self.payer_note.as_ref(),
+ };
+
+ (payer, offer, invoice_request)
+ }
+}
+
+impl Writeable for Refund {
+ fn write<W: Writer>(&self, writer: &mut W) -> Result<(), io::Error> {
+ WithoutLength(&self.bytes).write(writer)
+ }
+}
+
+impl Writeable for RefundContents {
+ fn write<W: Writer>(&self, writer: &mut W) -> Result<(), io::Error> {
+ self.as_tlv_stream().write(writer)
+ }
}
type RefundTlvStream = (PayerTlvStream, OfferTlvStream, InvoiceRequestTlvStream);
+type RefundTlvStreamRef<'a> = (
+ PayerTlvStreamRef<'a>,
+ OfferTlvStreamRef<'a>,
+ InvoiceRequestTlvStreamRef<'a>,
+);
+
impl SeekReadable for RefundTlvStream {
fn read<R: io::Read + io::Seek>(r: &mut R) -> Result<Self, DecodeError> {
let payer = SeekReadable::read(r)?;
}
}
+impl Bech32Encode for Refund {
+ const BECH32_HRP: &'static str = "lnr";
+}
+
+impl FromStr for Refund {
+ type Err = ParseError;
+
+ fn from_str(s: &str) -> Result<Self, <Self as FromStr>::Err> {
+ Refund::from_bech32_str(s)
+ }
+}
+
impl TryFrom<Vec<u8>> for Refund {
type Error = ParseError;
})
}
}
+
+impl core::fmt::Display for Refund {
+ fn fmt(&self, f: &mut core::fmt::Formatter) -> Result<(), core::fmt::Error> {
+ self.fmt_bech32_str(f)
+ }
+}
+
+#[cfg(test)]
+mod tests {
+ use super::{Refund, RefundBuilder, RefundTlvStreamRef};
+
+ use bitcoin::blockdata::constants::ChainHash;
+ use bitcoin::network::constants::Network;
+ use bitcoin::secp256k1::{KeyPair, PublicKey, Secp256k1, SecretKey};
+ use core::convert::TryFrom;
+ use core::time::Duration;
+ use crate::ln::features::{InvoiceRequestFeatures, OfferFeatures};
+ use crate::ln::msgs::{DecodeError, MAX_VALUE_MSAT};
+ use crate::offers::invoice_request::InvoiceRequestTlvStreamRef;
+ use crate::offers::offer::OfferTlvStreamRef;
+ use crate::offers::parse::{ParseError, SemanticError};
+ use crate::offers::payer::PayerTlvStreamRef;
+ use crate::onion_message::{BlindedHop, BlindedPath};
+ use crate::util::ser::{BigSize, Writeable};
+ use crate::util::string::PrintableString;
+
+ fn payer_pubkey() -> PublicKey {
+ let secp_ctx = Secp256k1::new();
+ KeyPair::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[42; 32]).unwrap()).public_key()
+ }
+
+ fn pubkey(byte: u8) -> PublicKey {
+ let secp_ctx = Secp256k1::new();
+ PublicKey::from_secret_key(&secp_ctx, &privkey(byte))
+ }
+
+ fn privkey(byte: u8) -> SecretKey {
+ SecretKey::from_slice(&[byte; 32]).unwrap()
+ }
+
+ trait ToBytes {
+ fn to_bytes(&self) -> Vec<u8>;
+ }
+
+ impl<'a> ToBytes for RefundTlvStreamRef<'a> {
+ fn to_bytes(&self) -> Vec<u8> {
+ let mut buffer = Vec::new();
+ self.write(&mut buffer).unwrap();
+ buffer
+ }
+ }
+
+ #[test]
+ fn builds_refund_with_defaults() {
+ let refund = RefundBuilder::new("foo".into(), vec![1; 32], payer_pubkey(), 1000).unwrap()
+ .build().unwrap();
+
+ let mut buffer = Vec::new();
+ refund.write(&mut buffer).unwrap();
+
+ assert_eq!(refund.bytes, buffer.as_slice());
+ assert_eq!(refund.metadata(), &[1; 32]);
+ assert_eq!(refund.description(), PrintableString("foo"));
+ assert_eq!(refund.absolute_expiry(), None);
+ #[cfg(feature = "std")]
+ assert!(!refund.is_expired());
+ assert_eq!(refund.paths(), &[]);
+ assert_eq!(refund.issuer(), None);
+ assert_eq!(refund.chain(), ChainHash::using_genesis_block(Network::Bitcoin));
+ assert_eq!(refund.amount_msats(), 1000);
+ assert_eq!(refund.features(), &InvoiceRequestFeatures::empty());
+ assert_eq!(refund.payer_id(), payer_pubkey());
+ assert_eq!(refund.payer_note(), None);
+
+ assert_eq!(
+ refund.as_tlv_stream(),
+ (
+ PayerTlvStreamRef { metadata: Some(&vec![1; 32]) },
+ OfferTlvStreamRef {
+ chains: None,
+ metadata: None,
+ currency: None,
+ amount: None,
+ description: Some(&String::from("foo")),
+ features: None,
+ absolute_expiry: None,
+ paths: None,
+ issuer: None,
+ quantity_max: None,
+ node_id: None,
+ },
+ InvoiceRequestTlvStreamRef {
+ chain: None,
+ amount: Some(1000),
+ features: None,
+ quantity: None,
+ payer_id: Some(&payer_pubkey()),
+ payer_note: None,
+ },
+ ),
+ );
+
+ if let Err(e) = Refund::try_from(buffer) {
+ panic!("error parsing refund: {:?}", e);
+ }
+ }
+
+ #[test]
+ fn fails_building_refund_with_invalid_amount() {
+ match RefundBuilder::new("foo".into(), vec![1; 32], payer_pubkey(), MAX_VALUE_MSAT + 1) {
+ Ok(_) => panic!("expected error"),
+ Err(e) => assert_eq!(e, SemanticError::InvalidAmount),
+ }
+ }
+
+ #[test]
+ fn builds_refund_with_absolute_expiry() {
+ let future_expiry = Duration::from_secs(u64::max_value());
+ let past_expiry = Duration::from_secs(0);
+
+ let refund = RefundBuilder::new("foo".into(), vec![1; 32], payer_pubkey(), 1000).unwrap()
+ .absolute_expiry(future_expiry)
+ .build()
+ .unwrap();
+ let (_, tlv_stream, _) = refund.as_tlv_stream();
+ #[cfg(feature = "std")]
+ assert!(!refund.is_expired());
+ assert_eq!(refund.absolute_expiry(), Some(future_expiry));
+ assert_eq!(tlv_stream.absolute_expiry, Some(future_expiry.as_secs()));
+
+ let refund = RefundBuilder::new("foo".into(), vec![1; 32], payer_pubkey(), 1000).unwrap()
+ .absolute_expiry(future_expiry)
+ .absolute_expiry(past_expiry)
+ .build()
+ .unwrap();
+ let (_, tlv_stream, _) = refund.as_tlv_stream();
+ #[cfg(feature = "std")]
+ assert!(refund.is_expired());
+ assert_eq!(refund.absolute_expiry(), Some(past_expiry));
+ assert_eq!(tlv_stream.absolute_expiry, Some(past_expiry.as_secs()));
+ }
+
+ #[test]
+ fn builds_refund_with_paths() {
+ let paths = vec![
+ BlindedPath {
+ introduction_node_id: 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_id: 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 refund = RefundBuilder::new("foo".into(), vec![1; 32], payer_pubkey(), 1000).unwrap()
+ .path(paths[0].clone())
+ .path(paths[1].clone())
+ .build()
+ .unwrap();
+ let (_, offer_tlv_stream, invoice_request_tlv_stream) = refund.as_tlv_stream();
+ assert_eq!(refund.paths(), paths.as_slice());
+ assert_eq!(refund.payer_id(), pubkey(42));
+ assert_ne!(pubkey(42), pubkey(44));
+ assert_eq!(offer_tlv_stream.paths, Some(&paths));
+ assert_eq!(invoice_request_tlv_stream.payer_id, Some(&pubkey(42)));
+ }
+
+ #[test]
+ fn builds_refund_with_issuer() {
+ let refund = RefundBuilder::new("foo".into(), vec![1; 32], payer_pubkey(), 1000).unwrap()
+ .issuer("bar".into())
+ .build()
+ .unwrap();
+ let (_, tlv_stream, _) = refund.as_tlv_stream();
+ assert_eq!(refund.issuer(), Some(PrintableString("bar")));
+ assert_eq!(tlv_stream.issuer, Some(&String::from("bar")));
+
+ let refund = RefundBuilder::new("foo".into(), vec![1; 32], payer_pubkey(), 1000).unwrap()
+ .issuer("bar".into())
+ .issuer("baz".into())
+ .build()
+ .unwrap();
+ let (_, tlv_stream, _) = refund.as_tlv_stream();
+ assert_eq!(refund.issuer(), Some(PrintableString("baz")));
+ assert_eq!(tlv_stream.issuer, Some(&String::from("baz")));
+ }
+
+ #[test]
+ fn builds_refund_with_chain() {
+ let mainnet = ChainHash::using_genesis_block(Network::Bitcoin);
+ let testnet = ChainHash::using_genesis_block(Network::Testnet);
+
+ let refund = RefundBuilder::new("foo".into(), vec![1; 32], payer_pubkey(), 1000).unwrap()
+ .chain(Network::Bitcoin)
+ .build().unwrap();
+ let (_, _, tlv_stream) = refund.as_tlv_stream();
+ assert_eq!(refund.chain(), mainnet);
+ assert_eq!(tlv_stream.chain, None);
+
+ let refund = RefundBuilder::new("foo".into(), vec![1; 32], payer_pubkey(), 1000).unwrap()
+ .chain(Network::Testnet)
+ .build().unwrap();
+ let (_, _, tlv_stream) = refund.as_tlv_stream();
+ assert_eq!(refund.chain(), testnet);
+ assert_eq!(tlv_stream.chain, Some(&testnet));
+
+ let refund = RefundBuilder::new("foo".into(), vec![1; 32], payer_pubkey(), 1000).unwrap()
+ .chain(Network::Regtest)
+ .chain(Network::Testnet)
+ .build().unwrap();
+ let (_, _, tlv_stream) = refund.as_tlv_stream();
+ assert_eq!(refund.chain(), testnet);
+ assert_eq!(tlv_stream.chain, Some(&testnet));
+ }
+
+ #[test]
+ fn builds_refund_with_payer_note() {
+ let refund = RefundBuilder::new("foo".into(), vec![1; 32], payer_pubkey(), 1000).unwrap()
+ .payer_note("bar".into())
+ .build().unwrap();
+ let (_, _, tlv_stream) = refund.as_tlv_stream();
+ assert_eq!(refund.payer_note(), Some(PrintableString("bar")));
+ assert_eq!(tlv_stream.payer_note, Some(&String::from("bar")));
+
+ let refund = RefundBuilder::new("foo".into(), vec![1; 32], payer_pubkey(), 1000).unwrap()
+ .payer_note("bar".into())
+ .payer_note("baz".into())
+ .build().unwrap();
+ let (_, _, tlv_stream) = refund.as_tlv_stream();
+ assert_eq!(refund.payer_note(), Some(PrintableString("baz")));
+ assert_eq!(tlv_stream.payer_note, Some(&String::from("baz")));
+ }
+
+ #[test]
+ fn parses_refund_with_metadata() {
+ let refund = RefundBuilder::new("foo".into(), vec![1; 32], payer_pubkey(), 1000).unwrap()
+ .build().unwrap();
+ if let Err(e) = refund.to_string().parse::<Refund>() {
+ panic!("error parsing refund: {:?}", e);
+ }
+
+ let mut tlv_stream = refund.as_tlv_stream();
+ tlv_stream.0.metadata = None;
+
+ match Refund::try_from(tlv_stream.to_bytes()) {
+ Ok(_) => panic!("expected error"),
+ Err(e) => {
+ assert_eq!(e, ParseError::InvalidSemantics(SemanticError::MissingPayerMetadata));
+ },
+ }
+ }
+
+ #[test]
+ fn parses_refund_with_description() {
+ let refund = RefundBuilder::new("foo".into(), vec![1; 32], payer_pubkey(), 1000).unwrap()
+ .build().unwrap();
+ if let Err(e) = refund.to_string().parse::<Refund>() {
+ panic!("error parsing refund: {:?}", e);
+ }
+
+ let mut tlv_stream = refund.as_tlv_stream();
+ tlv_stream.1.description = None;
+
+ match Refund::try_from(tlv_stream.to_bytes()) {
+ Ok(_) => panic!("expected error"),
+ Err(e) => {
+ assert_eq!(e, ParseError::InvalidSemantics(SemanticError::MissingDescription));
+ },
+ }
+ }
+
+ #[test]
+ fn parses_refund_with_amount() {
+ let refund = RefundBuilder::new("foo".into(), vec![1; 32], payer_pubkey(), 1000).unwrap()
+ .build().unwrap();
+ if let Err(e) = refund.to_string().parse::<Refund>() {
+ panic!("error parsing refund: {:?}", e);
+ }
+
+ let mut tlv_stream = refund.as_tlv_stream();
+ tlv_stream.2.amount = None;
+
+ match Refund::try_from(tlv_stream.to_bytes()) {
+ Ok(_) => panic!("expected error"),
+ Err(e) => {
+ assert_eq!(e, ParseError::InvalidSemantics(SemanticError::MissingAmount));
+ },
+ }
+
+ let mut tlv_stream = refund.as_tlv_stream();
+ tlv_stream.2.amount = Some(MAX_VALUE_MSAT + 1);
+
+ match Refund::try_from(tlv_stream.to_bytes()) {
+ Ok(_) => panic!("expected error"),
+ Err(e) => {
+ assert_eq!(e, ParseError::InvalidSemantics(SemanticError::InvalidAmount));
+ },
+ }
+ }
+
+ #[test]
+ fn parses_refund_with_payer_id() {
+ let refund = RefundBuilder::new("foo".into(), vec![1; 32], payer_pubkey(), 1000).unwrap()
+ .build().unwrap();
+ if let Err(e) = refund.to_string().parse::<Refund>() {
+ panic!("error parsing refund: {:?}", e);
+ }
+
+ let mut tlv_stream = refund.as_tlv_stream();
+ tlv_stream.2.payer_id = None;
+
+ match Refund::try_from(tlv_stream.to_bytes()) {
+ Ok(_) => panic!("expected error"),
+ Err(e) => {
+ assert_eq!(e, ParseError::InvalidSemantics(SemanticError::MissingPayerId));
+ },
+ }
+ }
+
+ #[test]
+ fn parses_refund_with_optional_fields() {
+ let past_expiry = Duration::from_secs(0);
+ let paths = vec![
+ BlindedPath {
+ introduction_node_id: 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_id: 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 refund = RefundBuilder::new("foo".into(), vec![1; 32], payer_pubkey(), 1000).unwrap()
+ .absolute_expiry(past_expiry)
+ .issuer("bar".into())
+ .path(paths[0].clone())
+ .path(paths[1].clone())
+ .chain(Network::Testnet)
+ .features_unchecked(InvoiceRequestFeatures::unknown())
+ .payer_note("baz".into())
+ .build()
+ .unwrap();
+ match refund.to_string().parse::<Refund>() {
+ Ok(refund) => {
+ assert_eq!(refund.absolute_expiry(), Some(past_expiry));
+ #[cfg(feature = "std")]
+ assert!(refund.is_expired());
+ assert_eq!(refund.paths(), &paths[..]);
+ assert_eq!(refund.issuer(), Some(PrintableString("bar")));
+ assert_eq!(refund.chain(), ChainHash::using_genesis_block(Network::Testnet));
+ assert_eq!(refund.features(), &InvoiceRequestFeatures::unknown());
+ assert_eq!(refund.payer_note(), Some(PrintableString("baz")));
+ },
+ Err(e) => panic!("error parsing refund: {:?}", e),
+ }
+ }
+
+ #[test]
+ fn fails_parsing_refund_with_unexpected_fields() {
+ let refund = RefundBuilder::new("foo".into(), vec![1; 32], payer_pubkey(), 1000).unwrap()
+ .build().unwrap();
+ if let Err(e) = refund.to_string().parse::<Refund>() {
+ panic!("error parsing refund: {:?}", e);
+ }
+
+ let chains = vec![ChainHash::using_genesis_block(Network::Testnet)];
+ let mut tlv_stream = refund.as_tlv_stream();
+ tlv_stream.1.chains = Some(&chains);
+
+ match Refund::try_from(tlv_stream.to_bytes()) {
+ Ok(_) => panic!("expected error"),
+ Err(e) => {
+ assert_eq!(e, ParseError::InvalidSemantics(SemanticError::UnexpectedChain));
+ },
+ }
+
+ let mut tlv_stream = refund.as_tlv_stream();
+ tlv_stream.1.currency = Some(&b"USD");
+ tlv_stream.1.amount = Some(1000);
+
+ match Refund::try_from(tlv_stream.to_bytes()) {
+ Ok(_) => panic!("expected error"),
+ Err(e) => {
+ assert_eq!(e, ParseError::InvalidSemantics(SemanticError::UnexpectedAmount));
+ },
+ }
+
+ let features = OfferFeatures::unknown();
+ let mut tlv_stream = refund.as_tlv_stream();
+ tlv_stream.1.features = Some(&features);
+
+ match Refund::try_from(tlv_stream.to_bytes()) {
+ Ok(_) => panic!("expected error"),
+ Err(e) => {
+ assert_eq!(e, ParseError::InvalidSemantics(SemanticError::UnexpectedFeatures));
+ },
+ }
+
+ let mut tlv_stream = refund.as_tlv_stream();
+ tlv_stream.1.quantity_max = Some(10);
+
+ match Refund::try_from(tlv_stream.to_bytes()) {
+ Ok(_) => panic!("expected error"),
+ Err(e) => {
+ assert_eq!(e, ParseError::InvalidSemantics(SemanticError::UnexpectedQuantity));
+ },
+ }
+
+ let node_id = payer_pubkey();
+ let mut tlv_stream = refund.as_tlv_stream();
+ tlv_stream.1.node_id = Some(&node_id);
+
+ match Refund::try_from(tlv_stream.to_bytes()) {
+ Ok(_) => panic!("expected error"),
+ Err(e) => {
+ assert_eq!(e, ParseError::InvalidSemantics(SemanticError::UnexpectedSigningPubkey));
+ },
+ }
+
+ let mut tlv_stream = refund.as_tlv_stream();
+ tlv_stream.2.quantity = Some(10);
+
+ match Refund::try_from(tlv_stream.to_bytes()) {
+ Ok(_) => panic!("expected error"),
+ Err(e) => {
+ assert_eq!(e, ParseError::InvalidSemantics(SemanticError::UnexpectedQuantity));
+ },
+ }
+ }
+
+ #[test]
+ fn fails_parsing_refund_with_extra_tlv_records() {
+ let secp_ctx = Secp256k1::new();
+ let keys = KeyPair::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[42; 32]).unwrap());
+ let refund = RefundBuilder::new("foo".into(), vec![1; 32], keys.public_key(), 1000).unwrap()
+ .build().unwrap();
+
+ let mut encoded_refund = Vec::new();
+ refund.write(&mut encoded_refund).unwrap();
+ BigSize(1002).write(&mut encoded_refund).unwrap();
+ BigSize(32).write(&mut encoded_refund).unwrap();
+ [42u8; 32].write(&mut encoded_refund).unwrap();
+
+ match Refund::try_from(encoded_refund) {
+ Ok(_) => panic!("expected error"),
+ Err(e) => assert_eq!(e, ParseError::Decode(DecodeError::InvalidValue)),
+ }
+ }
+}
projects / rust-lightning / blobdiff