Document nonzero anchors in features module.

[rust-lightning] / lightning / src / offers / invoice.rs

diff --git a/lightning/src/offers/invoice.rs b/lightning/src/offers/invoice.rs
index b2717f7338f193cd17589ee7e3216c972d7463ad..4d1398644ce0d24483205b0ac04e428ba3d52482 100644 (file)
--- a/lightning/src/offers/invoice.rs
+++ b/lightning/src/offers/invoice.rs
@@ -29,7 +29,7 @@
 //!
 //! # use lightning::ln::PaymentHash;
 //! # use lightning::offers::invoice::BlindedPayInfo;
-//! # use lightning::onion_message::BlindedPath;
+//! # use lightning::blinded_path::BlindedPath;
 //! #
 //! # fn create_payment_paths() -> Vec<(BlindedPath, BlindedPayInfo)> { unimplemented!() }
 //! # fn create_payment_hash() -> PaymentHash { unimplemented!() }
@@ -104,6 +104,7 @@ use bitcoin::util::schnorr::TweakedPublicKey;
 use core::convert::{Infallible, TryFrom};
 use core::time::Duration;
 use crate::io;
+use crate::blinded_path::BlindedPath;
 use crate::ln::PaymentHash;
 use crate::ln::features::{BlindedHopFeatures, Bolt12InvoiceFeatures};
 use crate::ln::inbound_payment::ExpandedKey;
@@ -115,8 +116,8 @@ use crate::offers::parse::{ParseError, ParsedMessage, SemanticError};
 use crate::offers::payer::{PAYER_METADATA_TYPE, PayerTlvStream, PayerTlvStreamRef};
 use crate::offers::refund::{IV_BYTES as REFUND_IV_BYTES, Refund, RefundContents};
 use crate::offers::signer;
-use crate::onion_message::BlindedPath;
 use crate::util::ser::{HighZeroBytesDroppedBigSize, Iterable, SeekReadable, WithoutLength, Writeable, Writer};
+use crate::util::string::PrintableString;
 
 use crate::prelude::*;
 
@@ -133,6 +134,8 @@ pub(super) const SIGNATURE_TAG: &'static str = concat!("lightning", "invoice", "
 ///
 /// See [module-level documentation] for usage.
 ///
+/// This is not exported to bindings users as builder patterns don't map outside of move semantics.
+///
 /// [`InvoiceRequest`]: crate::offers::invoice_request::InvoiceRequest
 /// [`Refund`]: crate::offers::refund::Refund
 /// [module-level documentation]: self
@@ -144,12 +147,18 @@ pub struct InvoiceBuilder<'a, S: SigningPubkeyStrategy> {
 }
 
 /// Indicates how [`Invoice::signing_pubkey`] was set.
+///
+/// This is not exported to bindings users as builder patterns don't map outside of move semantics.
 pub trait SigningPubkeyStrategy {}
 
 /// [`Invoice::signing_pubkey`] was explicitly set.
+///
+/// This is not exported to bindings users as builder patterns don't map outside of move semantics.
 pub struct ExplicitSigningPubkey {}
 
 /// [`Invoice::signing_pubkey`] was derived.
+///
+/// This is not exported to bindings users as builder patterns don't map outside of move semantics.
 pub struct DerivedSigningPubkey {}
 
 impl SigningPubkeyStrategy for ExplicitSigningPubkey {}
@@ -368,6 +377,8 @@ impl<'a> UnsignedInvoice<'a> {
        }
 
        /// Signs the invoice using the given function.
+       ///
+       /// This is not exported to bindings users as functions aren't currently mapped.
        pub fn sign<F, E>(self, sign: F) -> Result<Invoice, SignError<E>>
        where
                F: FnOnce(&Message) -> Result<Signature, E>
@@ -404,6 +415,8 @@ impl<'a> UnsignedInvoice<'a> {
 /// An invoice may be sent in response to an [`InvoiceRequest`] in the case of an offer or sent
 /// directly after scanning a refund. It includes all the information needed to pay a recipient.
 ///
+/// This is not exported to bindings users as its name conflicts with the BOLT 11 Invoice type.
+///
 /// [`Offer`]: crate::offers::offer::Offer
 /// [`Refund`]: crate::offers::refund::Refund
 /// [`InvoiceRequest`]: crate::offers::invoice_request::InvoiceRequest
@@ -452,6 +465,12 @@ struct InvoiceFields {
 }
 
 impl Invoice {
+       /// 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()
+       }
+
        /// Paths to the recipient originating from publicly reachable nodes, including information
        /// needed for routing payments across them.
        ///
@@ -607,6 +626,15 @@ impl InvoiceContents {
                }
        }
 
+       fn description(&self) -> PrintableString {
+               match self {
+                       InvoiceContents::ForOffer { invoice_request, .. } => {
+                               invoice_request.inner.offer.description()
+                       },
+                       InvoiceContents::ForRefund { refund, .. } => refund.description(),
+               }
+       }
+
        fn fields(&self) -> &InvoiceFields {
                match self {
                        InvoiceContents::ForOffer { fields, .. } => fields,
@@ -732,7 +760,7 @@ type BlindedPayInfoIter<'a> = core::iter::Map<
 >;
 
 /// Information needed to route a payment across a [`BlindedPath`].
-#[derive(Clone, Debug, PartialEq)]
+#[derive(Clone, Debug, Hash, Eq, PartialEq)]
 pub struct BlindedPayInfo {
        /// Base fee charged (in millisatoshi) for the entire blinded path.
        pub fee_base_msat: u32,
@@ -926,7 +954,8 @@ mod tests {
        use bitcoin::util::schnorr::TweakedPublicKey;
        use core::convert::TryFrom;
        use core::time::Duration;
-       use crate::chain::keysinterface::KeyMaterial;
+       use crate::blinded_path::{BlindedHop, BlindedPath};
+       use crate::sign::KeyMaterial;
        use crate::ln::features::Bolt12InvoiceFeatures;
        use crate::ln::inbound_payment::ExpandedKey;
        use crate::ln::msgs::DecodeError;
@@ -937,8 +966,8 @@ mod tests {
        use crate::offers::payer::PayerTlvStreamRef;
        use crate::offers::refund::RefundBuilder;
        use crate::offers::test_utils::*;
-       use crate::onion_message::{BlindedHop, BlindedPath};
        use crate::util::ser::{BigSize, Iterable, Writeable};
+       use crate::util::string::PrintableString;
 
        trait ToBytes {
                fn to_bytes(&self) -> Vec<u8>;
@@ -975,6 +1004,7 @@ mod tests {
                invoice.write(&mut buffer).unwrap();
 
                assert_eq!(invoice.bytes, buffer.as_slice());
+               assert_eq!(invoice.description(), PrintableString("foo"));
                assert_eq!(invoice.payment_paths(), payment_paths.as_slice());
                assert_eq!(invoice.created_at(), now);
                assert_eq!(invoice.relative_expiry(), DEFAULT_RELATIVE_EXPIRY);
@@ -1057,6 +1087,7 @@ mod tests {
                invoice.write(&mut buffer).unwrap();
 
                assert_eq!(invoice.bytes, buffer.as_slice());
+               assert_eq!(invoice.description(), PrintableString("foo"));
                assert_eq!(invoice.payment_paths(), payment_paths.as_slice());
                assert_eq!(invoice.created_at(), now);
                assert_eq!(invoice.relative_expiry(), DEFAULT_RELATIVE_EXPIRY);