//!
//! An [`InvoiceRequest`] can be built from a parsed [`Offer`] as an "offer to be paid". It is
//! typically constructed by a customer and sent to the merchant who had published the corresponding
-//! offer. The recipient of the request responds with an `Invoice`.
+//! offer. The recipient of the request responds with an [`Invoice`].
//!
//! For an "offer for money" (e.g., refund, ATM withdrawal), where an offer doesn't exist as a
//! precursor, see [`Refund`].
//!
+//! [`Invoice`]: crate::offers::invoice::Invoice
//! [`Refund`]: crate::offers::refund::Refund
//!
//! ```ignore
use bitcoin::secp256k1::schnorr::Signature;
use core::convert::TryFrom;
use crate::io;
+use crate::ln::PaymentHash;
use crate::ln::features::InvoiceRequestFeatures;
use crate::ln::msgs::DecodeError;
+use crate::offers::invoice::{BlindedPayInfo, InvoiceBuilder};
use crate::offers::merkle::{SignError, SignatureTlvStream, SignatureTlvStreamRef, self};
use crate::offers::offer::{Offer, OfferContents, OfferTlvStream, OfferTlvStreamRef};
use crate::offers::parse::{ParseError, ParsedMessage, SemanticError};
use crate::offers::payer::{PayerContents, PayerTlvStream, PayerTlvStreamRef};
+use crate::onion_message::BlindedPath;
use crate::util::ser::{HighZeroBytesDroppedBigSize, SeekReadable, WithoutLength, Writeable, Writer};
use crate::util::string::PrintableString;
}
}
-/// An `InvoiceRequest` is a request for an `Invoice` formulated from an [`Offer`].
+/// An `InvoiceRequest` is a request for an [`Invoice`] formulated from an [`Offer`].
///
/// An offer may provide choices such as quantity, amount, chain, features, etc. An invoice request
/// specifies these such that its recipient can send an invoice for payment.
///
+/// [`Invoice`]: crate::offers::invoice::Invoice
/// [`Offer`]: crate::offers::offer::Offer
#[derive(Clone, Debug)]
pub struct InvoiceRequest {
pub(super) bytes: Vec<u8>,
- contents: InvoiceRequestContents,
+ pub(super) contents: InvoiceRequestContents,
signature: Signature,
}
-/// The contents of an [`InvoiceRequest`], which may be shared with an `Invoice`.
+/// The contents of an [`InvoiceRequest`], which may be shared with an [`Invoice`].
+///
+/// [`Invoice`]: crate::offers::invoice::Invoice
#[derive(Clone, Debug)]
pub(super) struct InvoiceRequestContents {
payer: PayerContents,
- offer: OfferContents,
+ pub(super) offer: OfferContents,
chain: Option<ChainHash>,
amount_msats: Option<u64>,
features: InvoiceRequestFeatures,
self.signature
}
+ /// Creates an [`Invoice`] for the request with the given required fields.
+ ///
+ /// Unless [`InvoiceBuilder::relative_expiry`] is set, the invoice will expire two hours after
+ /// calling this method in `std` builds. For `no-std` builds, a final [`Duration`] parameter
+ /// must be given, which is used to set [`Invoice::created_at`] since [`std::time::SystemTime`]
+ /// is not available.
+ ///
+ /// The caller is expected to remember the preimage of `payment_hash` in order to claim a payment
+ /// for the invoice.
+ ///
+ /// The `payment_paths` parameter is useful for maintaining the payment recipient's privacy. It
+ /// must contain one or more elements ordered from most-preferred to least-preferred, if there's
+ /// a preference. Note, however, that any privacy is lost if a public node id was used for
+ /// [`Offer::signing_pubkey`].
+ ///
+ /// Errors if the request contains unknown required features.
+ ///
+ /// [`Duration`]: core::time::Duration
+ /// [`Invoice`]: crate::offers::invoice::Invoice
+ /// [`Invoice::created_at`]: crate::offers::invoice::Invoice::created_at
+ pub fn respond_with(
+ &self, payment_paths: Vec<(BlindedPath, BlindedPayInfo)>, payment_hash: PaymentHash,
+ #[cfg(any(test, not(feature = "std")))]
+ created_at: core::time::Duration
+ ) -> Result<InvoiceBuilder, SemanticError> {
+ if self.features().requires_unknown_bits() {
+ return Err(SemanticError::UnknownRequiredFeatures);
+ }
+
+ #[cfg(all(not(test), feature = "std"))]
+ let created_at = std::time::SystemTime::now()
+ .duration_since(std::time::SystemTime::UNIX_EPOCH)
+ .expect("SystemTime::now() should come after SystemTime::UNIX_EPOCH");
+
+ InvoiceBuilder::for_offer(self, payment_paths, created_at, payment_hash)
+ }
+
#[cfg(test)]
fn as_tlv_stream(&self) -> FullInvoiceRequestTlvStreamRef {
let (payer_tlv_stream, offer_tlv_stream, invoice_request_tlv_stream) =
}
impl InvoiceRequestContents {
- fn chain(&self) -> ChainHash {
+ pub(super) fn chain(&self) -> ChainHash {
self.chain.unwrap_or_else(|| self.offer.implied_chain())
}
tlv_stream!(InvoiceRequestTlvStream, InvoiceRequestTlvStreamRef, 80..160, {
(80, chain: ChainHash),
(82, amount: (u64, HighZeroBytesDroppedBigSize)),
- (84, features: InvoiceRequestFeatures),
+ (84, features: (InvoiceRequestFeatures, WithoutLength)),
(86, quantity: (u64, HighZeroBytesDroppedBigSize)),
(88, payer_id: PublicKey),
(89, payer_note: (String, WithoutLength)),
#[test]
fn builds_invoice_request_with_quantity() {
+ let one = NonZeroU64::new(1).unwrap();
let ten = NonZeroU64::new(10).unwrap();
let invoice_request = OfferBuilder::new("foo".into(), recipient_pubkey())
.amount_msats(1000)
- .supported_quantity(Quantity::one())
+ .supported_quantity(Quantity::One)
.build().unwrap()
.request_invoice(vec![1; 32], payer_pubkey()).unwrap()
.build().unwrap()
match OfferBuilder::new("foo".into(), recipient_pubkey())
.amount_msats(1000)
- .supported_quantity(Quantity::one())
+ .supported_quantity(Quantity::One)
.build().unwrap()
.request_invoice(vec![1; 32], payer_pubkey()).unwrap()
.amount_msats(2_000).unwrap()
Ok(_) => panic!("expected error"),
Err(e) => assert_eq!(e, SemanticError::MissingQuantity),
}
+
+ match OfferBuilder::new("foo".into(), recipient_pubkey())
+ .amount_msats(1000)
+ .supported_quantity(Quantity::Bounded(one))
+ .build().unwrap()
+ .request_invoice(vec![1; 32], payer_pubkey()).unwrap()
+ .build()
+ {
+ Ok(_) => panic!("expected error"),
+ Err(e) => assert_eq!(e, SemanticError::MissingQuantity),
+ }
}
#[test]
#[test]
fn parses_invoice_request_with_quantity() {
+ let one = NonZeroU64::new(1).unwrap();
let ten = NonZeroU64::new(10).unwrap();
let invoice_request = OfferBuilder::new("foo".into(), recipient_pubkey())
.amount_msats(1000)
- .supported_quantity(Quantity::one())
+ .supported_quantity(Quantity::One)
.build().unwrap()
.request_invoice(vec![1; 32], payer_pubkey()).unwrap()
.build().unwrap()
let invoice_request = OfferBuilder::new("foo".into(), recipient_pubkey())
.amount_msats(1000)
- .supported_quantity(Quantity::one())
+ .supported_quantity(Quantity::One)
.build().unwrap()
.request_invoice(vec![1; 32], payer_pubkey()).unwrap()
.amount_msats(2_000).unwrap()
Ok(_) => panic!("expected error"),
Err(e) => assert_eq!(e, ParseError::InvalidSemantics(SemanticError::MissingQuantity)),
}
+
+ let invoice_request = OfferBuilder::new("foo".into(), recipient_pubkey())
+ .amount_msats(1000)
+ .supported_quantity(Quantity::Bounded(one))
+ .build().unwrap()
+ .request_invoice(vec![1; 32], payer_pubkey()).unwrap()
+ .build_unchecked()
+ .sign(payer_sign).unwrap();
+
+ let mut buffer = Vec::new();
+ invoice_request.write(&mut buffer).unwrap();
+
+ match InvoiceRequest::try_from(buffer) {
+ Ok(_) => panic!("expected error"),
+ Err(e) => assert_eq!(e, ParseError::InvalidSemantics(SemanticError::MissingQuantity)),
+ }
}
#[test]
projects / rust-lightning / blobdiff