1 // This file is Copyright its original authors, visible in version control
2 // history and in the source files from which this was generated.
4 // This file is licensed under the license available in the LICENSE or LICENSE.md
5 // file in the root of this repository or, if no such file exists, the same
6 // license as that which applies to the original source files from which this
7 // source was automatically generated.
9 //! Data structures and encoding for refunds.
11 //! A [`Refund`] is an \"offer for money\" and is typically constructed by a merchant and presented
12 //! directly to the customer. The recipient responds with a [`Bolt12Invoice`] to be paid.
14 //! This is an [`InvoiceRequest`] produced *not* in response to an [`Offer`].
16 //! [`Bolt12Invoice`]: crate::offers::invoice::Bolt12Invoice
17 //! [`InvoiceRequest`]: crate::offers::invoice_request::InvoiceRequest
18 //! [`Offer`]: crate::offers::offer::Offer
23 //! extern crate bitcoin;
24 //! extern crate core;
25 //! extern crate lightning;
27 //! use core::convert::TryFrom;
28 //! use core::time::Duration;
30 //! use bitcoin::network::constants::Network;
31 //! use bitcoin::secp256k1::{KeyPair, PublicKey, Secp256k1, SecretKey};
32 //! use lightning::offers::parse::Bolt12ParseError;
33 //! use lightning::offers::refund::{Refund, RefundBuilder};
34 //! use lightning::util::ser::{Readable, Writeable};
36 //! # use lightning::blinded_path::BlindedPath;
37 //! # #[cfg(feature = \"std\")]
38 //! # use std::time::SystemTime;
40 //! # fn create_blinded_path() -> BlindedPath { unimplemented!() }
41 //! # fn create_another_blinded_path() -> BlindedPath { unimplemented!() }
43 //! # #[cfg(feature = \"std\")]
44 //! # fn build() -> Result<(), Bolt12ParseError> {
45 //! let secp_ctx = Secp256k1::new();
46 //! let keys = KeyPair::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[42; 32]).unwrap());
47 //! let pubkey = PublicKey::from(keys);
49 //! let expiration = SystemTime::now() + Duration::from_secs(24 * 60 * 60);
50 //! let refund = RefundBuilder::new(\"coffee, large\".to_string(), vec![1; 32], pubkey, 20_000)?
51 //! .absolute_expiry(expiration.duration_since(SystemTime::UNIX_EPOCH).unwrap())
52 //! .issuer(\"Foo Bar\".to_string())
53 //! .path(create_blinded_path())
54 //! .path(create_another_blinded_path())
55 //! .chain(Network::Bitcoin)
56 //! .payer_note(\"refund for order #12345\".to_string())
59 //! // Encode as a bech32 string for use in a QR code.
60 //! let encoded_refund = refund.to_string();
62 //! // Parse from a bech32 string after scanning from a QR code.
63 //! let refund = encoded_refund.parse::<Refund>()?;
65 //! // Encode refund as raw bytes.
66 //! let mut bytes = Vec::new();
67 //! refund.write(&mut bytes).unwrap();
69 //! // Decode raw bytes into an refund.
70 //! let refund = Refund::try_from(bytes)?;
77 //! If constructing a [`Refund`] for use with a [`ChannelManager`], use
78 //! [`ChannelManager::create_refund_builder`] instead of [`RefundBuilder::new`].
80 //! [`ChannelManager`]: crate::ln::channelmanager::ChannelManager
81 //! [`ChannelManager::create_refund_builder`]: crate::ln::channelmanager::ChannelManager::create_refund_builder
83 use alloc::str::FromStr;
84 use alloc::string::String;
85 use core::ffi::c_void;
86 use core::convert::Infallible;
87 use bitcoin::hashes::Hash;
88 use crate::c_types::*;
89 #[cfg(feature="no-std")]
90 use alloc::{vec::Vec, boxed::Box};
93 use lightning::offers::refund::Refund as nativeRefundImport;
94 pub(crate) type nativeRefund = nativeRefundImport;
96 /// A `Refund` is a request to send an [`Bolt12Invoice`] without a preceding [`Offer`].
98 /// Typically, after an invoice is paid, the recipient may publish a refund allowing the sender to
99 /// recoup their funds. A refund may be used more generally as an \"offer for money\", such as with a
102 /// [`Bolt12Invoice`]: crate::offers::invoice::Bolt12Invoice
103 /// [`Offer`]: crate::offers::offer::Offer
107 /// A pointer to the opaque Rust object.
109 /// Nearly everywhere, inner must be non-null, however in places where
110 /// the Rust equivalent takes an Option, it may be set to null to indicate None.
111 pub inner: *mut nativeRefund,
112 /// Indicates that this is the only struct which contains the same pointer.
114 /// Rust functions which take ownership of an object provided via an argument require
115 /// this to be true and invalidate the object pointed to by inner.
119 impl Drop for Refund {
121 if self.is_owned && !<*mut nativeRefund>::is_null(self.inner) {
122 let _ = unsafe { Box::from_raw(ObjOps::untweak_ptr(self.inner)) };
126 /// Frees any resources used by the Refund, if is_owned is set and inner is non-NULL.
128 pub extern "C" fn Refund_free(this_obj: Refund) { }
130 /// Used only if an object of this type is returned as a trait impl by a method
131 pub(crate) extern "C" fn Refund_free_void(this_ptr: *mut c_void) {
132 let _ = unsafe { Box::from_raw(this_ptr as *mut nativeRefund) };
136 pub(crate) fn get_native_ref(&self) -> &'static nativeRefund {
137 unsafe { &*ObjOps::untweak_ptr(self.inner) }
139 pub(crate) fn get_native_mut_ref(&self) -> &'static mut nativeRefund {
140 unsafe { &mut *ObjOps::untweak_ptr(self.inner) }
142 /// When moving out of the pointer, we have to ensure we aren't a reference, this makes that easy
143 pub(crate) fn take_inner(mut self) -> *mut nativeRefund {
144 assert!(self.is_owned);
145 let ret = ObjOps::untweak_ptr(self.inner);
146 self.inner = core::ptr::null_mut();
150 impl Clone for Refund {
151 fn clone(&self) -> Self {
153 inner: if <*mut nativeRefund>::is_null(self.inner) { core::ptr::null_mut() } else {
154 ObjOps::heap_alloc(unsafe { &*ObjOps::untweak_ptr(self.inner) }.clone()) },
160 /// Used only if an object of this type is returned as a trait impl by a method
161 pub(crate) extern "C" fn Refund_clone_void(this_ptr: *const c_void) -> *mut c_void {
162 Box::into_raw(Box::new(unsafe { (*(this_ptr as *const nativeRefund)).clone() })) as *mut c_void
165 /// Creates a copy of the Refund
166 pub extern "C" fn Refund_clone(orig: &Refund) -> Refund {
169 /// A complete description of the purpose of the refund. Intended to be displayed to the user
170 /// but with the caveat that it has not been verified in any way.
173 pub extern "C" fn Refund_description(this_arg: &crate::lightning::offers::refund::Refund) -> crate::lightning::util::string::PrintableString {
174 let mut ret = unsafe { &*ObjOps::untweak_ptr(this_arg.inner) }.description();
175 crate::lightning::util::string::PrintableString { inner: ObjOps::heap_alloc(ret), is_owned: true }
178 /// Duration since the Unix epoch when an invoice should no longer be sent.
180 /// If `None`, the refund does not expire.
183 pub extern "C" fn Refund_absolute_expiry(this_arg: &crate::lightning::offers::refund::Refund) -> crate::c_types::derived::COption_u64Z {
184 let mut ret = unsafe { &*ObjOps::untweak_ptr(this_arg.inner) }.absolute_expiry();
185 let mut local_ret = if ret.is_none() { crate::c_types::derived::COption_u64Z::None } else { crate::c_types::derived::COption_u64Z::Some( { ret.unwrap().as_secs() }) };
189 /// Whether the refund has expired.
192 pub extern "C" fn Refund_is_expired(this_arg: &crate::lightning::offers::refund::Refund) -> bool {
193 let mut ret = unsafe { &*ObjOps::untweak_ptr(this_arg.inner) }.is_expired();
197 /// The issuer of the refund, possibly beginning with `user@domain` or `domain`. Intended to be
198 /// displayed to the user but with the caveat that it has not been verified in any way.
200 /// Note that the return value (or a relevant inner pointer) may be NULL or all-0s to represent None
203 pub extern "C" fn Refund_issuer(this_arg: &crate::lightning::offers::refund::Refund) -> crate::lightning::util::string::PrintableString {
204 let mut ret = unsafe { &*ObjOps::untweak_ptr(this_arg.inner) }.issuer();
205 let mut local_ret = crate::lightning::util::string::PrintableString { inner: if ret.is_none() { core::ptr::null_mut() } else { { ObjOps::heap_alloc((ret.unwrap())) } }, is_owned: true };
209 /// Paths to the sender originating from publicly reachable nodes. Blinded paths provide sender
210 /// privacy by obfuscating its node id.
213 pub extern "C" fn Refund_paths(this_arg: &crate::lightning::offers::refund::Refund) -> crate::c_types::derived::CVec_BlindedPathZ {
214 let mut ret = unsafe { &*ObjOps::untweak_ptr(this_arg.inner) }.paths();
215 let mut local_ret_clone = Vec::new(); local_ret_clone.extend_from_slice(ret); let mut ret = local_ret_clone; let mut local_ret = Vec::new(); for mut item in ret.drain(..) { local_ret.push( { crate::lightning::blinded_path::BlindedPath { inner: ObjOps::heap_alloc(item), is_owned: true } }); };
219 /// An unpredictable series of bytes, typically containing information about the derivation of
222 /// [`payer_id`]: Self::payer_id
225 pub extern "C" fn Refund_payer_metadata(this_arg: &crate::lightning::offers::refund::Refund) -> crate::c_types::u8slice {
226 let mut ret = unsafe { &*ObjOps::untweak_ptr(this_arg.inner) }.payer_metadata();
227 let mut local_ret = crate::c_types::u8slice::from_slice(ret);
231 /// A chain that the refund is valid for.
234 pub extern "C" fn Refund_chain(this_arg: &crate::lightning::offers::refund::Refund) -> crate::c_types::ThirtyTwoBytes {
235 let mut ret = unsafe { &*ObjOps::untweak_ptr(this_arg.inner) }.chain();
236 crate::c_types::ThirtyTwoBytes { data: ret.to_bytes() }
239 /// The amount to refund in msats (i.e., the minimum lightning-payable unit for [`chain`]).
241 /// [`chain`]: Self::chain
244 pub extern "C" fn Refund_amount_msats(this_arg: &crate::lightning::offers::refund::Refund) -> u64 {
245 let mut ret = unsafe { &*ObjOps::untweak_ptr(this_arg.inner) }.amount_msats();
249 /// Features pertaining to requesting an invoice.
252 pub extern "C" fn Refund_features(this_arg: &crate::lightning::offers::refund::Refund) -> crate::lightning::ln::features::InvoiceRequestFeatures {
253 let mut ret = unsafe { &*ObjOps::untweak_ptr(this_arg.inner) }.features();
254 crate::lightning::ln::features::InvoiceRequestFeatures { inner: unsafe { ObjOps::nonnull_ptr_to_inner((ret as *const lightning::ln::features::InvoiceRequestFeatures<>) as *mut _) }, is_owned: false }
257 /// The quantity of an item that refund is for.
260 pub extern "C" fn Refund_quantity(this_arg: &crate::lightning::offers::refund::Refund) -> crate::c_types::derived::COption_u64Z {
261 let mut ret = unsafe { &*ObjOps::untweak_ptr(this_arg.inner) }.quantity();
262 let mut local_ret = if ret.is_none() { crate::c_types::derived::COption_u64Z::None } else { crate::c_types::derived::COption_u64Z::Some( { ret.unwrap() }) };
266 /// A public node id to send to in the case where there are no [`paths`]. Otherwise, a possibly
267 /// transient pubkey.
269 /// [`paths`]: Self::paths
272 pub extern "C" fn Refund_payer_id(this_arg: &crate::lightning::offers::refund::Refund) -> crate::c_types::PublicKey {
273 let mut ret = unsafe { &*ObjOps::untweak_ptr(this_arg.inner) }.payer_id();
274 crate::c_types::PublicKey::from_rust(&ret)
277 /// Payer provided note to include in the invoice.
279 /// Note that the return value (or a relevant inner pointer) may be NULL or all-0s to represent None
282 pub extern "C" fn Refund_payer_note(this_arg: &crate::lightning::offers::refund::Refund) -> crate::lightning::util::string::PrintableString {
283 let mut ret = unsafe { &*ObjOps::untweak_ptr(this_arg.inner) }.payer_note();
284 let mut local_ret = crate::lightning::util::string::PrintableString { inner: if ret.is_none() { core::ptr::null_mut() } else { { ObjOps::heap_alloc((ret.unwrap())) } }, is_owned: true };
289 /// Serialize the Refund object into a byte array which can be read by Refund_read
290 pub extern "C" fn Refund_write(obj: &crate::lightning::offers::refund::Refund) -> crate::c_types::derived::CVec_u8Z {
291 crate::c_types::serialize_obj(unsafe { &*obj }.get_native_ref())
294 pub(crate) extern "C" fn Refund_write_void(obj: *const c_void) -> crate::c_types::derived::CVec_u8Z {
295 crate::c_types::serialize_obj(unsafe { &*(obj as *const nativeRefund) })
298 /// Read a Refund object from a string
299 pub extern "C" fn Refund_from_str(s: crate::c_types::Str) -> crate::c_types::derived::CResult_RefundBolt12ParseErrorZ {
300 match lightning::offers::refund::Refund::from_str(s.into_str()) {
302 crate::c_types::CResultTempl::ok(
303 crate::lightning::offers::refund::Refund { inner: ObjOps::heap_alloc(r), is_owned: true }
307 crate::c_types::CResultTempl::err(
308 crate::lightning::offers::parse::Bolt12ParseError { inner: ObjOps::heap_alloc(e), is_owned: true }