1 // Prefix these with `rustdoc::` when we update our MSRV to be >= 1.52 to remove warnings.
2 #![deny(broken_intra_doc_links)]
3 #![deny(private_intra_doc_links)]
6 #![deny(non_upper_case_globals)]
7 #![deny(non_camel_case_types)]
8 #![deny(non_snake_case)]
11 #![cfg_attr(docsrs, feature(doc_auto_cfg))]
13 #![cfg_attr(feature = "strict", deny(warnings))]
14 #![cfg_attr(all(not(feature = "std"), not(test)), no_std)]
16 //! This crate provides data structures to represent
17 //! [lightning BOLT11](https://github.com/lightning/bolts/blob/master/11-payment-encoding.md)
18 //! invoices and functions to create, encode and decode these. If you just want to use the standard
19 //! en-/decoding functionality this should get you started:
21 //! * For parsing use `str::parse::<Invoice>(&self)` (see the docs of `impl FromStr for Invoice`)
22 //! * For constructing invoices use the `InvoiceBuilder`
23 //! * For serializing invoices use the `Display`/`ToString` traits
25 #[cfg(not(any(feature = "std", feature = "no-std")))]
26 compile_error!("at least one of the `std` or `no-std` features must be enabled");
31 pub(crate) mod time_utils;
34 extern crate bitcoin_hashes;
35 #[macro_use] extern crate lightning;
36 extern crate num_traits;
37 extern crate secp256k1;
39 #[cfg(any(test, feature = "std"))]
41 #[cfg(feature = "serde")]
44 #[cfg(feature = "std")]
45 use std::time::SystemTime;
48 use bitcoin_hashes::Hash;
49 use bitcoin_hashes::sha256;
50 use lightning::ln::PaymentSecret;
51 use lightning::ln::features::InvoiceFeatures;
52 #[cfg(any(doc, test))]
53 use lightning::routing::gossip::RoutingFees;
54 use lightning::routing::router::RouteHint;
55 use lightning::util::invoice::construct_invoice_preimage;
57 use secp256k1::PublicKey;
58 use secp256k1::{Message, Secp256k1};
59 use secp256k1::ecdsa::RecoverableSignature;
61 use core::fmt::{Display, Formatter, self};
62 use core::iter::FilterMap;
63 use core::num::ParseIntError;
65 use core::slice::Iter;
66 use core::time::Duration;
69 #[cfg(feature = "serde")]
70 use serde::{Deserialize, Deserializer,Serialize, Serializer, de::Error};
77 #[cfg(feature = "hashbrown")]
78 extern crate hashbrown;
80 pub use alloc::{vec, vec::Vec, string::String, collections::VecDeque, boxed::Box};
81 #[cfg(not(feature = "hashbrown"))]
82 pub use std::collections::{HashMap, HashSet, hash_map};
83 #[cfg(feature = "hashbrown")]
84 pub use self::hashbrown::{HashMap, HashSet, hash_map};
86 pub use alloc::string::ToString;
89 use crate::prelude::*;
91 /// Sync compat for std/no_std
92 #[cfg(feature = "std")]
94 pub use ::std::sync::{Mutex, MutexGuard};
97 /// Sync compat for std/no_std
98 #[cfg(not(feature = "std"))]
101 /// Errors that indicate what is wrong with the invoice. They have some granularity for debug
102 /// reasons, but should generally result in an "invalid BOLT11 invoice" message for the user.
103 #[allow(missing_docs)]
104 #[derive(PartialEq, Eq, Debug, Clone)]
105 pub enum ParseError {
106 Bech32Error(bech32::Error),
107 ParseAmountError(ParseIntError),
108 MalformedSignature(secp256k1::Error),
114 UnexpectedEndOfTaggedFields,
115 DescriptionDecodeError(str::Utf8Error),
117 IntegerOverflowError,
118 InvalidSegWitProgramLength,
119 InvalidPubKeyHashLength,
120 InvalidScriptHashLength,
122 InvalidSliceLength(String),
124 /// Not an error, but used internally to signal that a part of the invoice should be ignored
125 /// according to BOLT11
129 /// Indicates that something went wrong while parsing or validating the invoice. Parsing errors
130 /// should be mostly seen as opaque and are only there for debugging reasons. Semantic errors
131 /// like wrong signatures, missing fields etc. could mean that someone tampered with the invoice.
132 #[derive(PartialEq, Eq, Debug, Clone)]
133 pub enum ParseOrSemanticError {
134 /// The invoice couldn't be decoded
135 ParseError(ParseError),
137 /// The invoice could be decoded but violates the BOLT11 standard
138 SemanticError(crate::SemanticError),
141 /// The number of bits used to represent timestamps as defined in BOLT 11.
142 const TIMESTAMP_BITS: usize = 35;
144 /// The maximum timestamp as [`Duration::as_secs`] since the Unix epoch allowed by [`BOLT 11`].
146 /// [BOLT 11]: https://github.com/lightning/bolts/blob/master/11-payment-encoding.md
147 pub const MAX_TIMESTAMP: u64 = (1 << TIMESTAMP_BITS) - 1;
149 /// Default expiry time as defined by [BOLT 11].
151 /// [BOLT 11]: https://github.com/lightning/bolts/blob/master/11-payment-encoding.md
152 pub const DEFAULT_EXPIRY_TIME: u64 = 3600;
154 /// Default minimum final CLTV expiry as defined by [BOLT 11].
156 /// Note that this is *not* the same value as rust-lightning's minimum CLTV expiry, which is
157 /// provided in [`MIN_FINAL_CLTV_EXPIRY_DELTA`].
159 /// [BOLT 11]: https://github.com/lightning/bolts/blob/master/11-payment-encoding.md
160 /// [`MIN_FINAL_CLTV_EXPIRY_DELTA`]: lightning::ln::channelmanager::MIN_FINAL_CLTV_EXPIRY_DELTA
161 pub const DEFAULT_MIN_FINAL_CLTV_EXPIRY_DELTA: u64 = 18;
163 /// Builder for `Invoice`s. It's the most convenient and advised way to use this library. It ensures
164 /// that only a semantically and syntactically correct Invoice can be built using it.
167 /// extern crate secp256k1;
168 /// extern crate lightning;
169 /// extern crate lightning_invoice;
170 /// extern crate bitcoin_hashes;
172 /// use bitcoin_hashes::Hash;
173 /// use bitcoin_hashes::sha256;
175 /// use secp256k1::Secp256k1;
176 /// use secp256k1::SecretKey;
178 /// use lightning::ln::PaymentSecret;
180 /// use lightning_invoice::{Currency, InvoiceBuilder};
182 /// # #[cfg(not(feature = "std"))]
184 /// # #[cfg(feature = "std")]
186 /// let private_key = SecretKey::from_slice(
188 /// 0xe1, 0x26, 0xf6, 0x8f, 0x7e, 0xaf, 0xcc, 0x8b, 0x74, 0xf5, 0x4d, 0x26, 0x9f,
189 /// 0xe2, 0x06, 0xbe, 0x71, 0x50, 0x00, 0xf9, 0x4d, 0xac, 0x06, 0x7d, 0x1c, 0x04,
190 /// 0xa8, 0xca, 0x3b, 0x2d, 0xb7, 0x34
194 /// let payment_hash = sha256::Hash::from_slice(&[0; 32][..]).unwrap();
195 /// let payment_secret = PaymentSecret([42u8; 32]);
197 /// let invoice = InvoiceBuilder::new(Currency::Bitcoin)
198 /// .description("Coins pls!".into())
199 /// .payment_hash(payment_hash)
200 /// .payment_secret(payment_secret)
201 /// .current_timestamp()
202 /// .min_final_cltv_expiry_delta(144)
203 /// .build_signed(|hash| {
204 /// Secp256k1::new().sign_ecdsa_recoverable(hash, &private_key)
208 /// assert!(invoice.to_string().starts_with("lnbc1"));
212 /// # Type parameters
213 /// The two parameters `D` and `H` signal if the builder already contains the correct amount of the
215 /// * `D`: exactly one `Description` or `DescriptionHash`
216 /// * `H`: exactly one `PaymentHash`
217 /// * `T`: the timestamp is set
219 /// (C-not exported) as we likely need to manually select one set of boolean type parameters.
220 #[derive(Eq, PartialEq, Debug, Clone)]
221 pub struct InvoiceBuilder<D: tb::Bool, H: tb::Bool, T: tb::Bool, C: tb::Bool, S: tb::Bool> {
224 si_prefix: Option<SiPrefix>,
225 timestamp: Option<PositiveTimestamp>,
226 tagged_fields: Vec<TaggedField>,
227 error: Option<CreationError>,
229 phantom_d: core::marker::PhantomData<D>,
230 phantom_h: core::marker::PhantomData<H>,
231 phantom_t: core::marker::PhantomData<T>,
232 phantom_c: core::marker::PhantomData<C>,
233 phantom_s: core::marker::PhantomData<S>,
236 /// Represents a syntactically and semantically correct lightning BOLT11 invoice.
238 /// There are three ways to construct an `Invoice`:
239 /// 1. using `InvoiceBuilder`
240 /// 2. using `Invoice::from_signed(SignedRawInvoice)`
241 /// 3. using `str::parse::<Invoice>(&str)`
242 #[derive(Eq, PartialEq, Debug, Clone, Hash)]
244 signed_invoice: SignedRawInvoice,
247 /// Represents the description of an invoice which has to be either a directly included string or
248 /// a hash of a description provided out of band.
250 /// (C-not exported) As we don't have a good way to map the reference lifetimes making this
251 /// practically impossible to use safely in languages like C.
252 #[derive(Eq, PartialEq, Debug, Clone)]
253 pub enum InvoiceDescription<'f> {
254 /// Reference to the directly supplied description in the invoice
255 Direct(&'f Description),
257 /// Reference to the description's hash included in the invoice
261 /// Represents a signed `RawInvoice` with cached hash. The signature is not checked and may be
265 /// The hash has to be either from the deserialized invoice or from the serialized `raw_invoice`.
266 #[derive(Eq, PartialEq, Debug, Clone, Hash)]
267 pub struct SignedRawInvoice {
268 /// The rawInvoice that the signature belongs to
269 raw_invoice: RawInvoice,
271 /// Hash of the `RawInvoice` that will be used to check the signature.
273 /// * if the `SignedRawInvoice` was deserialized the hash is of from the original encoded form,
274 /// since it's not guaranteed that encoding it again will lead to the same result since integers
275 /// could have been encoded with leading zeroes etc.
276 /// * if the `SignedRawInvoice` was constructed manually the hash will be the calculated hash
277 /// from the `RawInvoice`
280 /// signature of the payment request
281 signature: InvoiceSignature,
284 /// Represents an syntactically correct Invoice for a payment on the lightning network,
285 /// but without the signature information.
286 /// De- and encoding should not lead to information loss but may lead to different hashes.
288 /// For methods without docs see the corresponding methods in `Invoice`.
289 #[derive(Eq, PartialEq, Debug, Clone, Hash)]
290 pub struct RawInvoice {
291 /// human readable part
295 pub data: RawDataPart,
298 /// Data of the `RawInvoice` that is encoded in the human readable part
300 /// (C-not exported) As we don't yet support `Option<Enum>`
301 #[derive(Eq, PartialEq, Debug, Clone, Hash)]
303 /// The currency deferred from the 3rd and 4th character of the bech32 transaction
304 pub currency: Currency,
306 /// The amount that, multiplied by the SI prefix, has to be payed
307 pub raw_amount: Option<u64>,
309 /// SI prefix that gets multiplied with the `raw_amount`
310 pub si_prefix: Option<SiPrefix>,
313 /// Data of the `RawInvoice` that is encoded in the data part
314 #[derive(Eq, PartialEq, Debug, Clone, Hash)]
315 pub struct RawDataPart {
316 /// generation time of the invoice
317 pub timestamp: PositiveTimestamp,
319 /// tagged fields of the payment request
320 pub tagged_fields: Vec<RawTaggedField>,
323 /// A timestamp that refers to a date after 1 January 1970.
327 /// The Unix timestamp representing the stored time has to be positive and no greater than
328 /// [`MAX_TIMESTAMP`].
329 #[derive(Eq, PartialEq, Debug, Clone, Hash)]
330 pub struct PositiveTimestamp(Duration);
332 /// SI prefixes for the human readable part
333 #[derive(Eq, PartialEq, Debug, Clone, Copy, Hash)]
346 /// Returns the multiplier to go from a BTC value to picoBTC implied by this SiPrefix.
347 /// This is effectively 10^12 * the prefix multiplier
348 pub fn multiplier(&self) -> u64 {
350 SiPrefix::Milli => 1_000_000_000,
351 SiPrefix::Micro => 1_000_000,
352 SiPrefix::Nano => 1_000,
357 /// Returns all enum variants of `SiPrefix` sorted in descending order of their associated
360 /// (C-not exported) As we don't yet support a slice of enums, and also because this function
361 /// isn't the most critical to expose.
362 pub fn values_desc() -> &'static [SiPrefix] {
363 use crate::SiPrefix::*;
364 static VALUES: [SiPrefix; 4] = [Milli, Micro, Nano, Pico];
369 /// Enum representing the crypto currencies (or networks) supported by this library
370 #[derive(Clone, Debug, Hash, Eq, PartialEq)]
388 /// Tagged field which may have an unknown tag
390 /// (C-not exported) as we don't currently support TaggedField
391 #[derive(Clone, Debug, Hash, Eq, PartialEq)]
392 pub enum RawTaggedField {
393 /// Parsed tagged field with known tag
394 KnownSemantics(TaggedField),
395 /// tagged field which was not parsed due to an unknown tag or undefined field semantics
396 UnknownSemantics(Vec<u5>),
399 /// Tagged field with known tag
401 /// For descriptions of the enum values please refer to the enclosed type's docs.
403 /// (C-not exported) As we don't yet support enum variants with the same name the struct contained
405 #[allow(missing_docs)]
406 #[derive(Clone, Debug, Hash, Eq, PartialEq)]
407 pub enum TaggedField {
409 Description(Description),
410 PayeePubKey(PayeePubKey),
411 DescriptionHash(Sha256),
412 ExpiryTime(ExpiryTime),
413 MinFinalCltvExpiryDelta(MinFinalCltvExpiryDelta),
415 PrivateRoute(PrivateRoute),
416 PaymentSecret(PaymentSecret),
417 Features(InvoiceFeatures),
421 #[derive(Clone, Debug, Hash, Eq, PartialEq)]
422 pub struct Sha256(/// (C-not exported) as the native hash types are not currently mapped
425 /// Description string
428 /// The description can be at most 639 __bytes__ long
429 #[derive(Clone, Debug, Hash, Eq, PartialEq)]
430 pub struct Description(String);
433 #[derive(Clone, Debug, Hash, Eq, PartialEq)]
434 pub struct PayeePubKey(pub PublicKey);
436 /// Positive duration that defines when (relatively to the timestamp) in the future the invoice
438 #[derive(Clone, Debug, Hash, Eq, PartialEq)]
439 pub struct ExpiryTime(Duration);
441 /// `min_final_cltv_expiry_delta` to use for the last HTLC in the route
442 #[derive(Clone, Debug, Hash, Eq, PartialEq)]
443 pub struct MinFinalCltvExpiryDelta(pub u64);
445 // TODO: better types instead onf byte arrays
446 /// Fallback address in case no LN payment is possible
447 #[allow(missing_docs)]
448 #[derive(Clone, Debug, Hash, Eq, PartialEq)]
454 PubKeyHash([u8; 20]),
455 ScriptHash([u8; 20]),
458 /// Recoverable signature
459 #[derive(Clone, Debug, Hash, Eq, PartialEq)]
460 pub struct InvoiceSignature(pub RecoverableSignature);
462 /// Private routing information
465 /// The encoded route has to be <1024 5bit characters long (<=639 bytes or <=12 hops)
467 #[derive(Clone, Debug, Hash, Eq, PartialEq)]
468 pub struct PrivateRoute(RouteHint);
470 /// Tag constants as specified in BOLT11
471 #[allow(missing_docs)]
473 pub const TAG_PAYMENT_HASH: u8 = 1;
474 pub const TAG_DESCRIPTION: u8 = 13;
475 pub const TAG_PAYEE_PUB_KEY: u8 = 19;
476 pub const TAG_DESCRIPTION_HASH: u8 = 23;
477 pub const TAG_EXPIRY_TIME: u8 = 6;
478 pub const TAG_MIN_FINAL_CLTV_EXPIRY_DELTA: u8 = 24;
479 pub const TAG_FALLBACK: u8 = 9;
480 pub const TAG_PRIVATE_ROUTE: u8 = 3;
481 pub const TAG_PAYMENT_SECRET: u8 = 16;
482 pub const TAG_FEATURES: u8 = 5;
485 impl InvoiceBuilder<tb::False, tb::False, tb::False, tb::False, tb::False> {
486 /// Construct new, empty `InvoiceBuilder`. All necessary fields have to be filled first before
487 /// `InvoiceBuilder::build(self)` becomes available.
488 pub fn new(currrency: Currency) -> Self {
494 tagged_fields: Vec::new(),
497 phantom_d: core::marker::PhantomData,
498 phantom_h: core::marker::PhantomData,
499 phantom_t: core::marker::PhantomData,
500 phantom_c: core::marker::PhantomData,
501 phantom_s: core::marker::PhantomData,
506 impl<D: tb::Bool, H: tb::Bool, T: tb::Bool, C: tb::Bool, S: tb::Bool> InvoiceBuilder<D, H, T, C, S> {
507 /// Helper function to set the completeness flags.
508 fn set_flags<DN: tb::Bool, HN: tb::Bool, TN: tb::Bool, CN: tb::Bool, SN: tb::Bool>(self) -> InvoiceBuilder<DN, HN, TN, CN, SN> {
509 InvoiceBuilder::<DN, HN, TN, CN, SN> {
510 currency: self.currency,
512 si_prefix: self.si_prefix,
513 timestamp: self.timestamp,
514 tagged_fields: self.tagged_fields,
517 phantom_d: core::marker::PhantomData,
518 phantom_h: core::marker::PhantomData,
519 phantom_t: core::marker::PhantomData,
520 phantom_c: core::marker::PhantomData,
521 phantom_s: core::marker::PhantomData,
525 /// Sets the amount in millisatoshis. The optimal SI prefix is chosen automatically.
526 pub fn amount_milli_satoshis(mut self, amount_msat: u64) -> Self {
527 let amount = amount_msat * 10; // Invoices are denominated in "pico BTC"
528 let biggest_possible_si_prefix = SiPrefix::values_desc()
530 .find(|prefix| amount % prefix.multiplier() == 0)
531 .expect("Pico should always match");
532 self.amount = Some(amount / biggest_possible_si_prefix.multiplier());
533 self.si_prefix = Some(*biggest_possible_si_prefix);
537 /// Sets the payee's public key.
538 pub fn payee_pub_key(mut self, pub_key: PublicKey) -> Self {
539 self.tagged_fields.push(TaggedField::PayeePubKey(PayeePubKey(pub_key)));
543 /// Sets the expiry time, dropping the subsecond part (which is not representable in BOLT 11
545 pub fn expiry_time(mut self, expiry_time: Duration) -> Self {
546 self.tagged_fields.push(TaggedField::ExpiryTime(ExpiryTime::from_duration(expiry_time)));
550 /// Adds a fallback address.
551 pub fn fallback(mut self, fallback: Fallback) -> Self {
552 self.tagged_fields.push(TaggedField::Fallback(fallback));
556 /// Adds a private route.
557 pub fn private_route(mut self, hint: RouteHint) -> Self {
558 match PrivateRoute::new(hint) {
559 Ok(r) => self.tagged_fields.push(TaggedField::PrivateRoute(r)),
560 Err(e) => self.error = Some(e),
566 impl<D: tb::Bool, H: tb::Bool, C: tb::Bool, S: tb::Bool> InvoiceBuilder<D, H, tb::True, C, S> {
567 /// Builds a `RawInvoice` if no `CreationError` occurred while construction any of the fields.
568 pub fn build_raw(self) -> Result<RawInvoice, CreationError> {
570 // If an error occurred at any time before, return it now
571 if let Some(e) = self.error {
576 currency: self.currency,
577 raw_amount: self.amount,
578 si_prefix: self.si_prefix,
581 let timestamp = self.timestamp.expect("ensured to be Some(t) by type T");
583 let tagged_fields = self.tagged_fields.into_iter().map(|tf| {
584 RawTaggedField::KnownSemantics(tf)
585 }).collect::<Vec<_>>();
587 let data = RawDataPart {
599 impl<H: tb::Bool, T: tb::Bool, C: tb::Bool, S: tb::Bool> InvoiceBuilder<tb::False, H, T, C, S> {
600 /// Set the description. This function is only available if no description (hash) was set.
601 pub fn description(mut self, description: String) -> InvoiceBuilder<tb::True, H, T, C, S> {
602 match Description::new(description) {
603 Ok(d) => self.tagged_fields.push(TaggedField::Description(d)),
604 Err(e) => self.error = Some(e),
609 /// Set the description hash. This function is only available if no description (hash) was set.
610 pub fn description_hash(mut self, description_hash: sha256::Hash) -> InvoiceBuilder<tb::True, H, T, C, S> {
611 self.tagged_fields.push(TaggedField::DescriptionHash(Sha256(description_hash)));
616 impl<D: tb::Bool, T: tb::Bool, C: tb::Bool, S: tb::Bool> InvoiceBuilder<D, tb::False, T, C, S> {
617 /// Set the payment hash. This function is only available if no payment hash was set.
618 pub fn payment_hash(mut self, hash: sha256::Hash) -> InvoiceBuilder<D, tb::True, T, C, S> {
619 self.tagged_fields.push(TaggedField::PaymentHash(Sha256(hash)));
624 impl<D: tb::Bool, H: tb::Bool, C: tb::Bool, S: tb::Bool> InvoiceBuilder<D, H, tb::False, C, S> {
625 /// Sets the timestamp to a specific [`SystemTime`].
626 #[cfg(feature = "std")]
627 pub fn timestamp(mut self, time: SystemTime) -> InvoiceBuilder<D, H, tb::True, C, S> {
628 match PositiveTimestamp::from_system_time(time) {
629 Ok(t) => self.timestamp = Some(t),
630 Err(e) => self.error = Some(e),
636 /// Sets the timestamp to a duration since the Unix epoch, dropping the subsecond part (which
637 /// is not representable in BOLT 11 invoices).
638 pub fn duration_since_epoch(mut self, time: Duration) -> InvoiceBuilder<D, H, tb::True, C, S> {
639 match PositiveTimestamp::from_duration_since_epoch(time) {
640 Ok(t) => self.timestamp = Some(t),
641 Err(e) => self.error = Some(e),
647 /// Sets the timestamp to the current system time.
648 #[cfg(feature = "std")]
649 pub fn current_timestamp(mut self) -> InvoiceBuilder<D, H, tb::True, C, S> {
650 let now = PositiveTimestamp::from_system_time(SystemTime::now());
651 self.timestamp = Some(now.expect("for the foreseeable future this shouldn't happen"));
656 impl<D: tb::Bool, H: tb::Bool, T: tb::Bool, S: tb::Bool> InvoiceBuilder<D, H, T, tb::False, S> {
657 /// Sets `min_final_cltv_expiry_delta`.
658 pub fn min_final_cltv_expiry_delta(mut self, min_final_cltv_expiry_delta: u64) -> InvoiceBuilder<D, H, T, tb::True, S> {
659 self.tagged_fields.push(TaggedField::MinFinalCltvExpiryDelta(MinFinalCltvExpiryDelta(min_final_cltv_expiry_delta)));
664 impl<D: tb::Bool, H: tb::Bool, T: tb::Bool, C: tb::Bool> InvoiceBuilder<D, H, T, C, tb::False> {
665 /// Sets the payment secret and relevant features.
666 pub fn payment_secret(mut self, payment_secret: PaymentSecret) -> InvoiceBuilder<D, H, T, C, tb::True> {
667 let mut features = InvoiceFeatures::empty();
668 features.set_variable_length_onion_required();
669 features.set_payment_secret_required();
670 self.tagged_fields.push(TaggedField::PaymentSecret(payment_secret));
671 self.tagged_fields.push(TaggedField::Features(features));
676 impl<D: tb::Bool, H: tb::Bool, T: tb::Bool, C: tb::Bool> InvoiceBuilder<D, H, T, C, tb::True> {
677 /// Sets the `basic_mpp` feature as optional.
678 pub fn basic_mpp(mut self) -> Self {
679 for field in self.tagged_fields.iter_mut() {
680 if let TaggedField::Features(f) = field {
681 f.set_basic_mpp_optional();
688 impl InvoiceBuilder<tb::True, tb::True, tb::True, tb::True, tb::True> {
689 /// Builds and signs an invoice using the supplied `sign_function`. This function MAY NOT fail
690 /// and MUST produce a recoverable signature valid for the given hash and if applicable also for
691 /// the included payee public key.
692 pub fn build_signed<F>(self, sign_function: F) -> Result<Invoice, CreationError>
693 where F: FnOnce(&Message) -> RecoverableSignature
695 let invoice = self.try_build_signed::<_, ()>(|hash| {
696 Ok(sign_function(hash))
701 Err(SignOrCreationError::CreationError(e)) => Err(e),
702 Err(SignOrCreationError::SignError(())) => unreachable!(),
706 /// Builds and signs an invoice using the supplied `sign_function`. This function MAY fail with
707 /// an error of type `E` and MUST produce a recoverable signature valid for the given hash and
708 /// if applicable also for the included payee public key.
709 pub fn try_build_signed<F, E>(self, sign_function: F) -> Result<Invoice, SignOrCreationError<E>>
710 where F: FnOnce(&Message) -> Result<RecoverableSignature, E>
712 let raw = match self.build_raw() {
714 Err(e) => return Err(SignOrCreationError::CreationError(e)),
717 let signed = match raw.sign(sign_function) {
719 Err(e) => return Err(SignOrCreationError::SignError(e)),
722 let invoice = Invoice {
723 signed_invoice: signed,
726 invoice.check_field_counts().expect("should be ensured by type signature of builder");
727 invoice.check_feature_bits().expect("should be ensured by type signature of builder");
728 invoice.check_amount().expect("should be ensured by type signature of builder");
735 impl SignedRawInvoice {
736 /// Disassembles the `SignedRawInvoice` into its three parts:
738 /// 2. hash of the raw invoice
740 pub fn into_parts(self) -> (RawInvoice, [u8; 32], InvoiceSignature) {
741 (self.raw_invoice, self.hash, self.signature)
744 /// The `RawInvoice` which was signed.
745 pub fn raw_invoice(&self) -> &RawInvoice {
749 /// The hash of the `RawInvoice` that was signed.
750 pub fn signable_hash(&self) -> &[u8; 32] {
754 /// InvoiceSignature for the invoice.
755 pub fn signature(&self) -> &InvoiceSignature {
759 /// Recovers the public key used for signing the invoice from the recoverable signature.
760 pub fn recover_payee_pub_key(&self) -> Result<PayeePubKey, secp256k1::Error> {
761 let hash = Message::from_slice(&self.hash[..])
762 .expect("Hash is 32 bytes long, same as MESSAGE_SIZE");
764 Ok(PayeePubKey(Secp256k1::new().recover_ecdsa(
770 /// Checks if the signature is valid for the included payee public key or if none exists if it's
771 /// valid for the recovered signature (which should always be true?).
772 pub fn check_signature(&self) -> bool {
773 let included_pub_key = self.raw_invoice.payee_pub_key();
775 let mut recovered_pub_key = Option::None;
776 if recovered_pub_key.is_none() {
777 let recovered = match self.recover_payee_pub_key() {
779 Err(_) => return false,
781 recovered_pub_key = Some(recovered);
784 let pub_key = included_pub_key.or(recovered_pub_key.as_ref())
785 .expect("One is always present");
787 let hash = Message::from_slice(&self.hash[..])
788 .expect("Hash is 32 bytes long, same as MESSAGE_SIZE");
790 let secp_context = Secp256k1::new();
791 let verification_result = secp_context.verify_ecdsa(
793 &self.signature.to_standard(),
797 match verification_result {
804 /// Finds the first element of an enum stream of a given variant and extracts one member of the
805 /// variant. If no element was found `None` gets returned.
807 /// The following example would extract the first B.
815 /// let elements = vec![Enum::A(1), Enum::A(2), Enum::B(3), Enum::A(4)];
817 /// assert_eq!(find_extract!(elements.iter(), Enum::B(x), x), Some(3u16));
819 macro_rules! find_extract {
820 ($iter:expr, $enm:pat, $enm_var:ident) => {
821 find_all_extract!($iter, $enm, $enm_var).next()
825 /// Finds the all elements of an enum stream of a given variant and extracts one member of the
826 /// variant through an iterator.
828 /// The following example would extract all A.
836 /// let elements = vec![Enum::A(1), Enum::A(2), Enum::B(3), Enum::A(4)];
839 /// find_all_extract!(elements.iter(), Enum::A(x), x).collect::<Vec<u8>>(),
840 /// vec![1u8, 2u8, 4u8]
843 macro_rules! find_all_extract {
844 ($iter:expr, $enm:pat, $enm_var:ident) => {
845 $iter.filter_map(|tf| match *tf {
846 $enm => Some($enm_var),
852 #[allow(missing_docs)]
854 /// Hash the HRP as bytes and signatureless data part.
855 fn hash_from_parts(hrp_bytes: &[u8], data_without_signature: &[u5]) -> [u8; 32] {
856 let preimage = construct_invoice_preimage(hrp_bytes, data_without_signature);
857 let mut hash: [u8; 32] = Default::default();
858 hash.copy_from_slice(&sha256::Hash::hash(&preimage)[..]);
862 /// Calculate the hash of the encoded `RawInvoice` which should be signed.
863 pub fn signable_hash(&self) -> [u8; 32] {
864 use bech32::ToBase32;
866 RawInvoice::hash_from_parts(
867 self.hrp.to_string().as_bytes(),
868 &self.data.to_base32()
872 /// Signs the invoice using the supplied `sign_function`. This function MAY fail with an error
873 /// of type `E`. Since the signature of a `SignedRawInvoice` is not required to be valid there
874 /// are no constraints regarding the validity of the produced signature.
876 /// (C-not exported) As we don't currently support passing function pointers into methods
878 pub fn sign<F, E>(self, sign_method: F) -> Result<SignedRawInvoice, E>
879 where F: FnOnce(&Message) -> Result<RecoverableSignature, E>
881 let raw_hash = self.signable_hash();
882 let hash = Message::from_slice(&raw_hash[..])
883 .expect("Hash is 32 bytes long, same as MESSAGE_SIZE");
884 let signature = sign_method(&hash)?;
886 Ok(SignedRawInvoice {
889 signature: InvoiceSignature(signature),
893 /// Returns an iterator over all tagged fields with known semantics.
895 /// (C-not exported) As there is not yet a manual mapping for a FilterMap
896 pub fn known_tagged_fields(&self)
897 -> FilterMap<Iter<RawTaggedField>, fn(&RawTaggedField) -> Option<&TaggedField>>
899 // For 1.14.0 compatibility: closures' types can't be written an fn()->() in the
900 // function's type signature.
901 // TODO: refactor once impl Trait is available
902 fn match_raw(raw: &RawTaggedField) -> Option<&TaggedField> {
904 RawTaggedField::KnownSemantics(ref tf) => Some(tf),
909 self.data.tagged_fields.iter().filter_map(match_raw )
912 pub fn payment_hash(&self) -> Option<&Sha256> {
913 find_extract!(self.known_tagged_fields(), TaggedField::PaymentHash(ref x), x)
916 pub fn description(&self) -> Option<&Description> {
917 find_extract!(self.known_tagged_fields(), TaggedField::Description(ref x), x)
920 pub fn payee_pub_key(&self) -> Option<&PayeePubKey> {
921 find_extract!(self.known_tagged_fields(), TaggedField::PayeePubKey(ref x), x)
924 pub fn description_hash(&self) -> Option<&Sha256> {
925 find_extract!(self.known_tagged_fields(), TaggedField::DescriptionHash(ref x), x)
928 pub fn expiry_time(&self) -> Option<&ExpiryTime> {
929 find_extract!(self.known_tagged_fields(), TaggedField::ExpiryTime(ref x), x)
932 pub fn min_final_cltv_expiry_delta(&self) -> Option<&MinFinalCltvExpiryDelta> {
933 find_extract!(self.known_tagged_fields(), TaggedField::MinFinalCltvExpiryDelta(ref x), x)
936 pub fn payment_secret(&self) -> Option<&PaymentSecret> {
937 find_extract!(self.known_tagged_fields(), TaggedField::PaymentSecret(ref x), x)
940 pub fn features(&self) -> Option<&InvoiceFeatures> {
941 find_extract!(self.known_tagged_fields(), TaggedField::Features(ref x), x)
944 /// (C-not exported) as we don't support Vec<&NonOpaqueType>
945 pub fn fallbacks(&self) -> Vec<&Fallback> {
946 find_all_extract!(self.known_tagged_fields(), TaggedField::Fallback(ref x), x).collect()
949 pub fn private_routes(&self) -> Vec<&PrivateRoute> {
950 find_all_extract!(self.known_tagged_fields(), TaggedField::PrivateRoute(ref x), x).collect()
953 pub fn amount_pico_btc(&self) -> Option<u64> {
954 self.hrp.raw_amount.map(|v| {
955 v * self.hrp.si_prefix.as_ref().map_or(1_000_000_000_000, |si| { si.multiplier() })
959 pub fn currency(&self) -> Currency {
960 self.hrp.currency.clone()
964 impl PositiveTimestamp {
965 /// Creates a `PositiveTimestamp` from a Unix timestamp in the range `0..=MAX_TIMESTAMP`.
967 /// Otherwise, returns a [`CreationError::TimestampOutOfBounds`].
968 pub fn from_unix_timestamp(unix_seconds: u64) -> Result<Self, CreationError> {
969 if unix_seconds <= MAX_TIMESTAMP {
970 Ok(Self(Duration::from_secs(unix_seconds)))
972 Err(CreationError::TimestampOutOfBounds)
976 /// Creates a `PositiveTimestamp` from a [`SystemTime`] with a corresponding Unix timestamp in
977 /// the range `0..=MAX_TIMESTAMP`.
979 /// Note that the subsecond part is dropped as it is not representable in BOLT 11 invoices.
981 /// Otherwise, returns a [`CreationError::TimestampOutOfBounds`].
982 #[cfg(feature = "std")]
983 pub fn from_system_time(time: SystemTime) -> Result<Self, CreationError> {
984 time.duration_since(SystemTime::UNIX_EPOCH)
985 .map(Self::from_duration_since_epoch)
986 .unwrap_or(Err(CreationError::TimestampOutOfBounds))
989 /// Creates a `PositiveTimestamp` from a [`Duration`] since the Unix epoch in the range
990 /// `0..=MAX_TIMESTAMP`.
992 /// Note that the subsecond part is dropped as it is not representable in BOLT 11 invoices.
994 /// Otherwise, returns a [`CreationError::TimestampOutOfBounds`].
995 pub fn from_duration_since_epoch(duration: Duration) -> Result<Self, CreationError> {
996 Self::from_unix_timestamp(duration.as_secs())
999 /// Returns the Unix timestamp representing the stored time
1000 pub fn as_unix_timestamp(&self) -> u64 {
1004 /// Returns the duration of the stored time since the Unix epoch
1005 pub fn as_duration_since_epoch(&self) -> Duration {
1009 /// Returns the [`SystemTime`] representing the stored time
1010 #[cfg(feature = "std")]
1011 pub fn as_time(&self) -> SystemTime {
1012 SystemTime::UNIX_EPOCH + self.0
1016 #[cfg(feature = "std")]
1017 impl From<PositiveTimestamp> for SystemTime {
1018 fn from(val: PositiveTimestamp) -> Self {
1019 SystemTime::UNIX_EPOCH + val.0
1024 /// Transform the `Invoice` into it's unchecked version
1025 pub fn into_signed_raw(self) -> SignedRawInvoice {
1029 /// Check that all mandatory fields are present
1030 fn check_field_counts(&self) -> Result<(), SemanticError> {
1031 // "A writer MUST include exactly one p field […]."
1032 let payment_hash_cnt = self.tagged_fields().filter(|&tf| match *tf {
1033 TaggedField::PaymentHash(_) => true,
1036 if payment_hash_cnt < 1 {
1037 return Err(SemanticError::NoPaymentHash);
1038 } else if payment_hash_cnt > 1 {
1039 return Err(SemanticError::MultiplePaymentHashes);
1042 // "A writer MUST include either exactly one d or exactly one h field."
1043 let description_cnt = self.tagged_fields().filter(|&tf| match *tf {
1044 TaggedField::Description(_) | TaggedField::DescriptionHash(_) => true,
1047 if description_cnt < 1 {
1048 return Err(SemanticError::NoDescription);
1049 } else if description_cnt > 1 {
1050 return Err(SemanticError::MultipleDescriptions);
1053 self.check_payment_secret()?;
1058 /// Checks that there is exactly one payment secret field
1059 fn check_payment_secret(&self) -> Result<(), SemanticError> {
1060 // "A writer MUST include exactly one `s` field."
1061 let payment_secret_count = self.tagged_fields().filter(|&tf| match *tf {
1062 TaggedField::PaymentSecret(_) => true,
1065 if payment_secret_count < 1 {
1066 return Err(SemanticError::NoPaymentSecret);
1067 } else if payment_secret_count > 1 {
1068 return Err(SemanticError::MultiplePaymentSecrets);
1074 /// Check that amount is a whole number of millisatoshis
1075 fn check_amount(&self) -> Result<(), SemanticError> {
1076 if let Some(amount_pico_btc) = self.amount_pico_btc() {
1077 if amount_pico_btc % 10 != 0 {
1078 return Err(SemanticError::ImpreciseAmount);
1084 /// Check that feature bits are set as required
1085 fn check_feature_bits(&self) -> Result<(), SemanticError> {
1086 self.check_payment_secret()?;
1088 // "A writer MUST set an s field if and only if the payment_secret feature is set."
1089 // (this requirement has been since removed, and we now require the payment secret
1090 // feature bit always).
1091 let features = self.tagged_fields().find(|&tf| match *tf {
1092 TaggedField::Features(_) => true,
1096 None => Err(SemanticError::InvalidFeatures),
1097 Some(TaggedField::Features(features)) => {
1098 if features.requires_unknown_bits() {
1099 Err(SemanticError::InvalidFeatures)
1100 } else if !features.supports_payment_secret() {
1101 Err(SemanticError::InvalidFeatures)
1106 Some(_) => unreachable!(),
1110 /// Check that the invoice is signed correctly and that key recovery works
1111 pub fn check_signature(&self) -> Result<(), SemanticError> {
1112 match self.signed_invoice.recover_payee_pub_key() {
1113 Err(secp256k1::Error::InvalidRecoveryId) =>
1114 return Err(SemanticError::InvalidRecoveryId),
1115 Err(secp256k1::Error::InvalidSignature) =>
1116 return Err(SemanticError::InvalidSignature),
1117 Err(e) => panic!("no other error may occur, got {:?}", e),
1121 if !self.signed_invoice.check_signature() {
1122 return Err(SemanticError::InvalidSignature);
1128 /// Constructs an `Invoice` from a `SignedRawInvoice` by checking all its invariants.
1130 /// use lightning_invoice::*;
1132 /// let invoice = "lnbc100p1psj9jhxdqud3jxktt5w46x7unfv9kz6mn0v3jsnp4q0d3p2sfluzdx45tqcs\
1133 /// h2pu5qc7lgq0xs578ngs6s0s68ua4h7cvspp5q6rmq35js88zp5dvwrv9m459tnk2zunwj5jalqtyxqulh0l\
1134 /// 5gflssp5nf55ny5gcrfl30xuhzj3nphgj27rstekmr9fw3ny5989s300gyus9qyysgqcqpcrzjqw2sxwe993\
1135 /// h5pcm4dxzpvttgza8zhkqxpgffcrf5v25nwpr3cmfg7z54kuqq8rgqqqqqqqq2qqqqq9qq9qrzjqd0ylaqcl\
1136 /// j9424x9m8h2vcukcgnm6s56xfgu3j78zyqzhgs4hlpzvznlugqq9vsqqqqqqqlgqqqqqeqq9qrzjqwldmj9d\
1137 /// ha74df76zhx6l9we0vjdquygcdt3kssupehe64g6yyp5yz5rhuqqwccqqyqqqqlgqqqqjcqq9qrzjqf9e58a\
1138 /// guqr0rcun0ajlvmzq3ek63cw2w282gv3z5uupmuwvgjtq2z55qsqqg6qqqyqqqrtnqqqzq3cqygrzjqvphms\
1139 /// ywntrrhqjcraumvc4y6r8v4z5v593trte429v4hredj7ms5z52usqq9ngqqqqqqqlgqqqqqqgq9qrzjq2v0v\
1140 /// p62g49p7569ev48cmulecsxe59lvaw3wlxm7r982zxa9zzj7z5l0cqqxusqqyqqqqlgqqqqqzsqygarl9fh3\
1141 /// 8s0gyuxjjgux34w75dnc6xp2l35j7es3jd4ugt3lu0xzre26yg5m7ke54n2d5sym4xcmxtl8238xxvw5h5h5\
1142 /// j5r6drg6k6zcqj0fcwg";
1144 /// let signed = invoice.parse::<SignedRawInvoice>().unwrap();
1146 /// assert!(Invoice::from_signed(signed).is_ok());
1148 pub fn from_signed(signed_invoice: SignedRawInvoice) -> Result<Self, SemanticError> {
1149 let invoice = Invoice {
1152 invoice.check_field_counts()?;
1153 invoice.check_feature_bits()?;
1154 invoice.check_signature()?;
1155 invoice.check_amount()?;
1160 /// Returns the `Invoice`'s timestamp (should equal its creation time)
1161 #[cfg(feature = "std")]
1162 pub fn timestamp(&self) -> SystemTime {
1163 self.signed_invoice.raw_invoice().data.timestamp.as_time()
1166 /// Returns the `Invoice`'s timestamp as a duration since the Unix epoch
1167 pub fn duration_since_epoch(&self) -> Duration {
1168 self.signed_invoice.raw_invoice().data.timestamp.0
1171 /// Returns an iterator over all tagged fields of this Invoice.
1173 /// (C-not exported) As there is not yet a manual mapping for a FilterMap
1174 pub fn tagged_fields(&self)
1175 -> FilterMap<Iter<RawTaggedField>, fn(&RawTaggedField) -> Option<&TaggedField>> {
1176 self.signed_invoice.raw_invoice().known_tagged_fields()
1179 /// Returns the hash to which we will receive the preimage on completion of the payment
1180 pub fn payment_hash(&self) -> &sha256::Hash {
1181 &self.signed_invoice.payment_hash().expect("checked by constructor").0
1184 /// Return the description or a hash of it for longer ones
1186 /// (C-not exported) because we don't yet export InvoiceDescription
1187 pub fn description(&self) -> InvoiceDescription {
1188 if let Some(direct) = self.signed_invoice.description() {
1189 return InvoiceDescription::Direct(direct);
1190 } else if let Some(hash) = self.signed_invoice.description_hash() {
1191 return InvoiceDescription::Hash(hash);
1193 unreachable!("ensured by constructor");
1196 /// Get the payee's public key if one was included in the invoice
1197 pub fn payee_pub_key(&self) -> Option<&PublicKey> {
1198 self.signed_invoice.payee_pub_key().map(|x| &x.0)
1201 /// Get the payment secret if one was included in the invoice
1202 pub fn payment_secret(&self) -> &PaymentSecret {
1203 self.signed_invoice.payment_secret().expect("was checked by constructor")
1206 /// Get the invoice features if they were included in the invoice
1207 pub fn features(&self) -> Option<&InvoiceFeatures> {
1208 self.signed_invoice.features()
1211 /// Recover the payee's public key (only to be used if none was included in the invoice)
1212 pub fn recover_payee_pub_key(&self) -> PublicKey {
1213 self.signed_invoice.recover_payee_pub_key().expect("was checked by constructor").0
1216 /// Returns the invoice's expiry time, if present, otherwise [`DEFAULT_EXPIRY_TIME`].
1217 pub fn expiry_time(&self) -> Duration {
1218 self.signed_invoice.expiry_time()
1220 .unwrap_or(Duration::from_secs(DEFAULT_EXPIRY_TIME))
1223 /// Returns whether the invoice has expired.
1224 #[cfg(feature = "std")]
1225 pub fn is_expired(&self) -> bool {
1226 Self::is_expired_from_epoch(&self.timestamp(), self.expiry_time())
1229 /// Returns whether the expiry time from the given epoch has passed.
1230 #[cfg(feature = "std")]
1231 pub(crate) fn is_expired_from_epoch(epoch: &SystemTime, expiry_time: Duration) -> bool {
1232 match epoch.elapsed() {
1233 Ok(elapsed) => elapsed > expiry_time,
1238 /// Returns whether the expiry time would pass at the given point in time.
1239 /// `at_time` is the timestamp as a duration since the Unix epoch.
1240 pub fn would_expire(&self, at_time: Duration) -> bool {
1241 self.duration_since_epoch()
1242 .checked_add(self.expiry_time())
1243 .unwrap_or_else(|| Duration::new(u64::max_value(), 1_000_000_000 - 1)) < at_time
1246 /// Returns the invoice's `min_final_cltv_expiry_delta` time, if present, otherwise
1247 /// [`DEFAULT_MIN_FINAL_CLTV_EXPIRY_DELTA`].
1248 pub fn min_final_cltv_expiry_delta(&self) -> u64 {
1249 self.signed_invoice.min_final_cltv_expiry_delta()
1251 .unwrap_or(DEFAULT_MIN_FINAL_CLTV_EXPIRY_DELTA)
1254 /// Returns a list of all fallback addresses
1256 /// (C-not exported) as we don't support Vec<&NonOpaqueType>
1257 pub fn fallbacks(&self) -> Vec<&Fallback> {
1258 self.signed_invoice.fallbacks()
1261 /// Returns a list of all routes included in the invoice
1262 pub fn private_routes(&self) -> Vec<&PrivateRoute> {
1263 self.signed_invoice.private_routes()
1266 /// Returns a list of all routes included in the invoice as the underlying hints
1267 pub fn route_hints(&self) -> Vec<RouteHint> {
1269 self.signed_invoice.known_tagged_fields(), TaggedField::PrivateRoute(ref x), x
1270 ).map(|route| (**route).clone()).collect()
1273 /// Returns the currency for which the invoice was issued
1274 pub fn currency(&self) -> Currency {
1275 self.signed_invoice.currency()
1278 /// Returns the amount if specified in the invoice as millisatoshis.
1279 pub fn amount_milli_satoshis(&self) -> Option<u64> {
1280 self.signed_invoice.amount_pico_btc().map(|v| v / 10)
1283 /// Returns the amount if specified in the invoice as pico BTC.
1284 fn amount_pico_btc(&self) -> Option<u64> {
1285 self.signed_invoice.amount_pico_btc()
1289 impl From<TaggedField> for RawTaggedField {
1290 fn from(tf: TaggedField) -> Self {
1291 RawTaggedField::KnownSemantics(tf)
1296 /// Numeric representation of the field's tag
1297 pub fn tag(&self) -> u5 {
1298 let tag = match *self {
1299 TaggedField::PaymentHash(_) => constants::TAG_PAYMENT_HASH,
1300 TaggedField::Description(_) => constants::TAG_DESCRIPTION,
1301 TaggedField::PayeePubKey(_) => constants::TAG_PAYEE_PUB_KEY,
1302 TaggedField::DescriptionHash(_) => constants::TAG_DESCRIPTION_HASH,
1303 TaggedField::ExpiryTime(_) => constants::TAG_EXPIRY_TIME,
1304 TaggedField::MinFinalCltvExpiryDelta(_) => constants::TAG_MIN_FINAL_CLTV_EXPIRY_DELTA,
1305 TaggedField::Fallback(_) => constants::TAG_FALLBACK,
1306 TaggedField::PrivateRoute(_) => constants::TAG_PRIVATE_ROUTE,
1307 TaggedField::PaymentSecret(_) => constants::TAG_PAYMENT_SECRET,
1308 TaggedField::Features(_) => constants::TAG_FEATURES,
1311 u5::try_from_u8(tag).expect("all tags defined are <32")
1317 /// Creates a new `Description` if `description` is at most 1023 __bytes__ long,
1318 /// returns `CreationError::DescriptionTooLong` otherwise
1320 /// Please note that single characters may use more than one byte due to UTF8 encoding.
1321 pub fn new(description: String) -> Result<Description, CreationError> {
1322 if description.len() > 639 {
1323 Err(CreationError::DescriptionTooLong)
1325 Ok(Description(description))
1329 /// Returns the underlying description `String`
1330 pub fn into_inner(self) -> String {
1335 impl From<Description> for String {
1336 fn from(val: Description) -> Self {
1341 impl Deref for Description {
1344 fn deref(&self) -> &str {
1349 impl From<PublicKey> for PayeePubKey {
1350 fn from(pk: PublicKey) -> Self {
1355 impl Deref for PayeePubKey {
1356 type Target = PublicKey;
1358 fn deref(&self) -> &PublicKey {
1364 /// Construct an `ExpiryTime` from seconds.
1365 pub fn from_seconds(seconds: u64) -> ExpiryTime {
1366 ExpiryTime(Duration::from_secs(seconds))
1369 /// Construct an `ExpiryTime` from a `Duration`, dropping the sub-second part.
1370 pub fn from_duration(duration: Duration) -> ExpiryTime {
1371 Self::from_seconds(duration.as_secs())
1374 /// Returns the expiry time in seconds
1375 pub fn as_seconds(&self) -> u64 {
1379 /// Returns a reference to the underlying `Duration` (=expiry time)
1380 pub fn as_duration(&self) -> &Duration {
1386 /// Creates a new (partial) route from a list of hops
1387 pub fn new(hops: RouteHint) -> Result<PrivateRoute, CreationError> {
1388 if hops.0.len() <= 12 {
1389 Ok(PrivateRoute(hops))
1391 Err(CreationError::RouteTooLong)
1395 /// Returns the underlying list of hops
1396 pub fn into_inner(self) -> RouteHint {
1401 impl From<PrivateRoute> for RouteHint {
1402 fn from(val: PrivateRoute) -> Self {
1407 impl Deref for PrivateRoute {
1408 type Target = RouteHint;
1410 fn deref(&self) -> &RouteHint {
1415 impl Deref for InvoiceSignature {
1416 type Target = RecoverableSignature;
1418 fn deref(&self) -> &RecoverableSignature {
1423 impl Deref for SignedRawInvoice {
1424 type Target = RawInvoice;
1426 fn deref(&self) -> &RawInvoice {
1431 /// Errors that may occur when constructing a new `RawInvoice` or `Invoice`
1432 #[derive(Eq, PartialEq, Debug, Clone)]
1433 pub enum CreationError {
1434 /// The supplied description string was longer than 639 __bytes__ (see [`Description::new(…)`](./struct.Description.html#method.new))
1437 /// The specified route has too many hops and can't be encoded
1440 /// The Unix timestamp of the supplied date is less than zero or greater than 35-bits
1441 TimestampOutOfBounds,
1443 /// The supplied millisatoshi amount was greater than the total bitcoin supply.
1446 /// Route hints were required for this invoice and were missing. Applies to
1447 /// [phantom invoices].
1449 /// [phantom invoices]: crate::utils::create_phantom_invoice
1452 /// The provided `min_final_cltv_expiry_delta` was less than [`MIN_FINAL_CLTV_EXPIRY_DELTA`].
1454 /// [`MIN_FINAL_CLTV_EXPIRY_DELTA`]: lightning::ln::channelmanager::MIN_FINAL_CLTV_EXPIRY_DELTA
1455 MinFinalCltvExpiryDeltaTooShort,
1458 impl Display for CreationError {
1459 fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
1461 CreationError::DescriptionTooLong => f.write_str("The supplied description string was longer than 639 bytes"),
1462 CreationError::RouteTooLong => f.write_str("The specified route has too many hops and can't be encoded"),
1463 CreationError::TimestampOutOfBounds => f.write_str("The Unix timestamp of the supplied date is less than zero or greater than 35-bits"),
1464 CreationError::InvalidAmount => f.write_str("The supplied millisatoshi amount was greater than the total bitcoin supply"),
1465 CreationError::MissingRouteHints => f.write_str("The invoice required route hints and they weren't provided"),
1466 CreationError::MinFinalCltvExpiryDeltaTooShort => f.write_str(
1467 "The supplied final CLTV expiry delta was less than LDK's `MIN_FINAL_CLTV_EXPIRY_DELTA`"),
1472 #[cfg(feature = "std")]
1473 impl std::error::Error for CreationError { }
1475 /// Errors that may occur when converting a `RawInvoice` to an `Invoice`. They relate to the
1476 /// requirements sections in BOLT #11
1477 #[derive(Eq, PartialEq, Debug, Clone)]
1478 pub enum SemanticError {
1479 /// The invoice is missing the mandatory payment hash
1482 /// The invoice has multiple payment hashes which isn't allowed
1483 MultiplePaymentHashes,
1485 /// No description or description hash are part of the invoice
1488 /// The invoice contains multiple descriptions and/or description hashes which isn't allowed
1489 MultipleDescriptions,
1491 /// The invoice is missing the mandatory payment secret, which all modern lightning nodes
1495 /// The invoice contains multiple payment secrets
1496 MultiplePaymentSecrets,
1498 /// The invoice's features are invalid
1501 /// The recovery id doesn't fit the signature/pub key
1504 /// The invoice's signature is invalid
1507 /// The invoice's amount was not a whole number of millisatoshis
1511 impl Display for SemanticError {
1512 fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
1514 SemanticError::NoPaymentHash => f.write_str("The invoice is missing the mandatory payment hash"),
1515 SemanticError::MultiplePaymentHashes => f.write_str("The invoice has multiple payment hashes which isn't allowed"),
1516 SemanticError::NoDescription => f.write_str("No description or description hash are part of the invoice"),
1517 SemanticError::MultipleDescriptions => f.write_str("The invoice contains multiple descriptions and/or description hashes which isn't allowed"),
1518 SemanticError::NoPaymentSecret => f.write_str("The invoice is missing the mandatory payment secret"),
1519 SemanticError::MultiplePaymentSecrets => f.write_str("The invoice contains multiple payment secrets"),
1520 SemanticError::InvalidFeatures => f.write_str("The invoice's features are invalid"),
1521 SemanticError::InvalidRecoveryId => f.write_str("The recovery id doesn't fit the signature/pub key"),
1522 SemanticError::InvalidSignature => f.write_str("The invoice's signature is invalid"),
1523 SemanticError::ImpreciseAmount => f.write_str("The invoice's amount was not a whole number of millisatoshis"),
1528 #[cfg(feature = "std")]
1529 impl std::error::Error for SemanticError { }
1531 /// When signing using a fallible method either an user-supplied `SignError` or a `CreationError`
1533 #[derive(Eq, PartialEq, Debug, Clone)]
1534 pub enum SignOrCreationError<S = ()> {
1535 /// An error occurred during signing
1538 /// An error occurred while building the transaction
1539 CreationError(CreationError),
1542 impl<S> Display for SignOrCreationError<S> {
1543 fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
1545 SignOrCreationError::SignError(_) => f.write_str("An error occurred during signing"),
1546 SignOrCreationError::CreationError(err) => err.fmt(f),
1551 #[cfg(feature = "serde")]
1552 impl Serialize for Invoice {
1553 fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> where S: Serializer {
1554 serializer.serialize_str(self.to_string().as_str())
1557 #[cfg(feature = "serde")]
1558 impl<'de> Deserialize<'de> for Invoice {
1559 fn deserialize<D>(deserializer: D) -> Result<Invoice, D::Error> where D: Deserializer<'de> {
1560 let bolt11 = String::deserialize(deserializer)?
1562 .map_err(|e| D::Error::custom(format!("{:?}", e)))?;
1570 use bitcoin_hashes::hex::FromHex;
1571 use bitcoin_hashes::sha256;
1574 fn test_system_time_bounds_assumptions() {
1576 crate::PositiveTimestamp::from_unix_timestamp(crate::MAX_TIMESTAMP + 1),
1577 Err(crate::CreationError::TimestampOutOfBounds)
1582 fn test_calc_invoice_hash() {
1583 use crate::{RawInvoice, RawHrp, RawDataPart, Currency, PositiveTimestamp};
1584 use crate::TaggedField::*;
1586 let invoice = RawInvoice {
1588 currency: Currency::Bitcoin,
1593 timestamp: PositiveTimestamp::from_unix_timestamp(1496314658).unwrap(),
1594 tagged_fields: vec![
1595 PaymentHash(crate::Sha256(sha256::Hash::from_hex(
1596 "0001020304050607080900010203040506070809000102030405060708090102"
1597 ).unwrap())).into(),
1598 Description(crate::Description::new(
1599 "Please consider supporting this project".to_owned()
1605 let expected_hash = [
1606 0xc3, 0xd4, 0xe8, 0x3f, 0x64, 0x6f, 0xa7, 0x9a, 0x39, 0x3d, 0x75, 0x27, 0x7b, 0x1d,
1607 0x85, 0x8d, 0xb1, 0xd1, 0xf7, 0xab, 0x71, 0x37, 0xdc, 0xb7, 0x83, 0x5d, 0xb2, 0xec,
1608 0xd5, 0x18, 0xe1, 0xc9
1611 assert_eq!(invoice.signable_hash(), expected_hash)
1615 fn test_check_signature() {
1616 use crate::TaggedField::*;
1617 use secp256k1::Secp256k1;
1618 use secp256k1::ecdsa::{RecoveryId, RecoverableSignature};
1619 use secp256k1::{SecretKey, PublicKey};
1620 use crate::{SignedRawInvoice, InvoiceSignature, RawInvoice, RawHrp, RawDataPart, Currency, Sha256,
1623 let invoice = SignedRawInvoice {
1624 raw_invoice: RawInvoice {
1626 currency: Currency::Bitcoin,
1631 timestamp: PositiveTimestamp::from_unix_timestamp(1496314658).unwrap(),
1632 tagged_fields: vec ! [
1633 PaymentHash(Sha256(sha256::Hash::from_hex(
1634 "0001020304050607080900010203040506070809000102030405060708090102"
1635 ).unwrap())).into(),
1637 crate::Description::new(
1638 "Please consider supporting this project".to_owned()
1645 0xc3, 0xd4, 0xe8, 0x3f, 0x64, 0x6f, 0xa7, 0x9a, 0x39, 0x3d, 0x75, 0x27,
1646 0x7b, 0x1d, 0x85, 0x8d, 0xb1, 0xd1, 0xf7, 0xab, 0x71, 0x37, 0xdc, 0xb7,
1647 0x83, 0x5d, 0xb2, 0xec, 0xd5, 0x18, 0xe1, 0xc9
1649 signature: InvoiceSignature(RecoverableSignature::from_compact(
1651 0x38u8, 0xec, 0x68, 0x91, 0x34, 0x5e, 0x20, 0x41, 0x45, 0xbe, 0x8a,
1652 0x3a, 0x99, 0xde, 0x38, 0xe9, 0x8a, 0x39, 0xd6, 0xa5, 0x69, 0x43,
1653 0x4e, 0x18, 0x45, 0xc8, 0xaf, 0x72, 0x05, 0xaf, 0xcf, 0xcc, 0x7f,
1654 0x42, 0x5f, 0xcd, 0x14, 0x63, 0xe9, 0x3c, 0x32, 0x88, 0x1e, 0xad,
1655 0x0d, 0x6e, 0x35, 0x6d, 0x46, 0x7e, 0xc8, 0xc0, 0x25, 0x53, 0xf9,
1656 0xaa, 0xb1, 0x5e, 0x57, 0x38, 0xb1, 0x1f, 0x12, 0x7f
1658 RecoveryId::from_i32(0).unwrap()
1662 assert!(invoice.check_signature());
1664 let private_key = SecretKey::from_slice(
1666 0xe1, 0x26, 0xf6, 0x8f, 0x7e, 0xaf, 0xcc, 0x8b, 0x74, 0xf5, 0x4d, 0x26, 0x9f, 0xe2,
1667 0x06, 0xbe, 0x71, 0x50, 0x00, 0xf9, 0x4d, 0xac, 0x06, 0x7d, 0x1c, 0x04, 0xa8, 0xca,
1668 0x3b, 0x2d, 0xb7, 0x34
1671 let public_key = PublicKey::from_secret_key(&Secp256k1::new(), &private_key);
1673 assert_eq!(invoice.recover_payee_pub_key(), Ok(crate::PayeePubKey(public_key)));
1675 let (raw_invoice, _, _) = invoice.into_parts();
1676 let new_signed = raw_invoice.sign::<_, ()>(|hash| {
1677 Ok(Secp256k1::new().sign_ecdsa_recoverable(hash, &private_key))
1680 assert!(new_signed.check_signature());
1684 fn test_check_feature_bits() {
1685 use crate::TaggedField::*;
1686 use lightning::ln::features::InvoiceFeatures;
1687 use secp256k1::Secp256k1;
1688 use secp256k1::SecretKey;
1689 use crate::{RawInvoice, RawHrp, RawDataPart, Currency, Sha256, PositiveTimestamp, Invoice,
1692 let private_key = SecretKey::from_slice(&[42; 32]).unwrap();
1693 let payment_secret = lightning::ln::PaymentSecret([21; 32]);
1694 let invoice_template = RawInvoice {
1696 currency: Currency::Bitcoin,
1701 timestamp: PositiveTimestamp::from_unix_timestamp(1496314658).unwrap(),
1702 tagged_fields: vec ! [
1703 PaymentHash(Sha256(sha256::Hash::from_hex(
1704 "0001020304050607080900010203040506070809000102030405060708090102"
1705 ).unwrap())).into(),
1707 crate::Description::new(
1708 "Please consider supporting this project".to_owned()
1717 let mut invoice = invoice_template.clone();
1718 invoice.data.tagged_fields.push(PaymentSecret(payment_secret).into());
1719 invoice.sign::<_, ()>(|hash| Ok(Secp256k1::new().sign_ecdsa_recoverable(hash, &private_key)))
1721 assert_eq!(Invoice::from_signed(invoice), Err(SemanticError::InvalidFeatures));
1723 // Missing feature bits
1725 let mut invoice = invoice_template.clone();
1726 invoice.data.tagged_fields.push(PaymentSecret(payment_secret).into());
1727 invoice.data.tagged_fields.push(Features(InvoiceFeatures::empty()).into());
1728 invoice.sign::<_, ()>(|hash| Ok(Secp256k1::new().sign_ecdsa_recoverable(hash, &private_key)))
1730 assert_eq!(Invoice::from_signed(invoice), Err(SemanticError::InvalidFeatures));
1732 let mut payment_secret_features = InvoiceFeatures::empty();
1733 payment_secret_features.set_payment_secret_required();
1735 // Including payment secret and feature bits
1737 let mut invoice = invoice_template.clone();
1738 invoice.data.tagged_fields.push(PaymentSecret(payment_secret).into());
1739 invoice.data.tagged_fields.push(Features(payment_secret_features.clone()).into());
1740 invoice.sign::<_, ()>(|hash| Ok(Secp256k1::new().sign_ecdsa_recoverable(hash, &private_key)))
1742 assert!(Invoice::from_signed(invoice).is_ok());
1744 // No payment secret or features
1746 let invoice = invoice_template.clone();
1747 invoice.sign::<_, ()>(|hash| Ok(Secp256k1::new().sign_ecdsa_recoverable(hash, &private_key)))
1749 assert_eq!(Invoice::from_signed(invoice), Err(SemanticError::NoPaymentSecret));
1751 // No payment secret or feature bits
1753 let mut invoice = invoice_template.clone();
1754 invoice.data.tagged_fields.push(Features(InvoiceFeatures::empty()).into());
1755 invoice.sign::<_, ()>(|hash| Ok(Secp256k1::new().sign_ecdsa_recoverable(hash, &private_key)))
1757 assert_eq!(Invoice::from_signed(invoice), Err(SemanticError::NoPaymentSecret));
1759 // Missing payment secret
1761 let mut invoice = invoice_template.clone();
1762 invoice.data.tagged_fields.push(Features(payment_secret_features).into());
1763 invoice.sign::<_, ()>(|hash| Ok(Secp256k1::new().sign_ecdsa_recoverable(hash, &private_key)))
1765 assert_eq!(Invoice::from_signed(invoice), Err(SemanticError::NoPaymentSecret));
1767 // Multiple payment secrets
1769 let mut invoice = invoice_template;
1770 invoice.data.tagged_fields.push(PaymentSecret(payment_secret).into());
1771 invoice.data.tagged_fields.push(PaymentSecret(payment_secret).into());
1772 invoice.sign::<_, ()>(|hash| Ok(Secp256k1::new().sign_ecdsa_recoverable(hash, &private_key)))
1774 assert_eq!(Invoice::from_signed(invoice), Err(SemanticError::MultiplePaymentSecrets));
1778 fn test_builder_amount() {
1781 let builder = InvoiceBuilder::new(Currency::Bitcoin)
1782 .description("Test".into())
1783 .payment_hash(sha256::Hash::from_slice(&[0;32][..]).unwrap())
1784 .duration_since_epoch(Duration::from_secs(1234567));
1786 let invoice = builder.clone()
1787 .amount_milli_satoshis(1500)
1791 assert_eq!(invoice.hrp.si_prefix, Some(SiPrefix::Nano));
1792 assert_eq!(invoice.hrp.raw_amount, Some(15));
1795 let invoice = builder
1796 .amount_milli_satoshis(150)
1800 assert_eq!(invoice.hrp.si_prefix, Some(SiPrefix::Pico));
1801 assert_eq!(invoice.hrp.raw_amount, Some(1500));
1805 fn test_builder_fail() {
1807 use lightning::routing::router::RouteHintHop;
1808 use std::iter::FromIterator;
1809 use secp256k1::PublicKey;
1811 let builder = InvoiceBuilder::new(Currency::Bitcoin)
1812 .payment_hash(sha256::Hash::from_slice(&[0;32][..]).unwrap())
1813 .duration_since_epoch(Duration::from_secs(1234567))
1814 .min_final_cltv_expiry_delta(144);
1816 let too_long_string = String::from_iter(
1817 (0..1024).map(|_| '?')
1820 let long_desc_res = builder.clone()
1821 .description(too_long_string)
1823 assert_eq!(long_desc_res, Err(CreationError::DescriptionTooLong));
1825 let route_hop = RouteHintHop {
1826 src_node_id: PublicKey::from_slice(
1828 0x03, 0x9e, 0x03, 0xa9, 0x01, 0xb8, 0x55, 0x34, 0xff, 0x1e, 0x92, 0xc4,
1829 0x3c, 0x74, 0x43, 0x1f, 0x7c, 0xe7, 0x20, 0x46, 0x06, 0x0f, 0xcf, 0x7a,
1830 0x95, 0xc3, 0x7e, 0x14, 0x8f, 0x78, 0xc7, 0x72, 0x55
1833 short_channel_id: 0,
1836 proportional_millionths: 0,
1838 cltv_expiry_delta: 0,
1839 htlc_minimum_msat: None,
1840 htlc_maximum_msat: None,
1842 let too_long_route = RouteHint(vec![route_hop; 13]);
1843 let long_route_res = builder.clone()
1844 .description("Test".into())
1845 .private_route(too_long_route)
1847 assert_eq!(long_route_res, Err(CreationError::RouteTooLong));
1849 let sign_error_res = builder
1850 .description("Test".into())
1851 .payment_secret(PaymentSecret([0; 32]))
1852 .try_build_signed(|_| {
1853 Err("ImaginaryError")
1855 assert_eq!(sign_error_res, Err(SignOrCreationError::SignError("ImaginaryError")));
1859 fn test_builder_ok() {
1861 use lightning::routing::router::RouteHintHop;
1862 use secp256k1::Secp256k1;
1863 use secp256k1::{SecretKey, PublicKey};
1864 use std::time::{UNIX_EPOCH, Duration};
1866 let secp_ctx = Secp256k1::new();
1868 let private_key = SecretKey::from_slice(
1870 0xe1, 0x26, 0xf6, 0x8f, 0x7e, 0xaf, 0xcc, 0x8b, 0x74, 0xf5, 0x4d, 0x26, 0x9f, 0xe2,
1871 0x06, 0xbe, 0x71, 0x50, 0x00, 0xf9, 0x4d, 0xac, 0x06, 0x7d, 0x1c, 0x04, 0xa8, 0xca,
1872 0x3b, 0x2d, 0xb7, 0x34
1875 let public_key = PublicKey::from_secret_key(&secp_ctx, &private_key);
1877 let route_1 = RouteHint(vec![
1879 src_node_id: public_key,
1880 short_channel_id: de::parse_int_be(&[123; 8], 256).expect("short chan ID slice too big?"),
1883 proportional_millionths: 1,
1885 cltv_expiry_delta: 145,
1886 htlc_minimum_msat: None,
1887 htlc_maximum_msat: None,
1890 src_node_id: public_key,
1891 short_channel_id: de::parse_int_be(&[42; 8], 256).expect("short chan ID slice too big?"),
1894 proportional_millionths: 2,
1896 cltv_expiry_delta: 146,
1897 htlc_minimum_msat: None,
1898 htlc_maximum_msat: None,
1902 let route_2 = RouteHint(vec![
1904 src_node_id: public_key,
1905 short_channel_id: 0,
1908 proportional_millionths: 3,
1910 cltv_expiry_delta: 147,
1911 htlc_minimum_msat: None,
1912 htlc_maximum_msat: None,
1915 src_node_id: public_key,
1916 short_channel_id: de::parse_int_be(&[1; 8], 256).expect("short chan ID slice too big?"),
1919 proportional_millionths: 4,
1921 cltv_expiry_delta: 148,
1922 htlc_minimum_msat: None,
1923 htlc_maximum_msat: None,
1927 let builder = InvoiceBuilder::new(Currency::BitcoinTestnet)
1928 .amount_milli_satoshis(123)
1929 .duration_since_epoch(Duration::from_secs(1234567))
1930 .payee_pub_key(public_key)
1931 .expiry_time(Duration::from_secs(54321))
1932 .min_final_cltv_expiry_delta(144)
1933 .fallback(Fallback::PubKeyHash([0;20]))
1934 .private_route(route_1.clone())
1935 .private_route(route_2.clone())
1936 .description_hash(sha256::Hash::from_slice(&[3;32][..]).unwrap())
1937 .payment_hash(sha256::Hash::from_slice(&[21;32][..]).unwrap())
1938 .payment_secret(PaymentSecret([42; 32]))
1941 let invoice = builder.clone().build_signed(|hash| {
1942 secp_ctx.sign_ecdsa_recoverable(hash, &private_key)
1945 assert!(invoice.check_signature().is_ok());
1946 assert_eq!(invoice.tagged_fields().count(), 10);
1948 assert_eq!(invoice.amount_milli_satoshis(), Some(123));
1949 assert_eq!(invoice.amount_pico_btc(), Some(1230));
1950 assert_eq!(invoice.currency(), Currency::BitcoinTestnet);
1951 #[cfg(feature = "std")]
1953 invoice.timestamp().duration_since(UNIX_EPOCH).unwrap().as_secs(),
1956 assert_eq!(invoice.payee_pub_key(), Some(&public_key));
1957 assert_eq!(invoice.expiry_time(), Duration::from_secs(54321));
1958 assert_eq!(invoice.min_final_cltv_expiry_delta(), 144);
1959 assert_eq!(invoice.fallbacks(), vec![&Fallback::PubKeyHash([0;20])]);
1960 assert_eq!(invoice.private_routes(), vec![&PrivateRoute(route_1), &PrivateRoute(route_2)]);
1962 invoice.description(),
1963 InvoiceDescription::Hash(&Sha256(sha256::Hash::from_slice(&[3;32][..]).unwrap()))
1965 assert_eq!(invoice.payment_hash(), &sha256::Hash::from_slice(&[21;32][..]).unwrap());
1966 assert_eq!(invoice.payment_secret(), &PaymentSecret([42; 32]));
1968 let mut expected_features = InvoiceFeatures::empty();
1969 expected_features.set_variable_length_onion_required();
1970 expected_features.set_payment_secret_required();
1971 expected_features.set_basic_mpp_optional();
1972 assert_eq!(invoice.features(), Some(&expected_features));
1974 let raw_invoice = builder.build_raw().unwrap();
1975 assert_eq!(raw_invoice, *invoice.into_signed_raw().raw_invoice())
1979 fn test_default_values() {
1981 use secp256k1::Secp256k1;
1982 use secp256k1::SecretKey;
1984 let signed_invoice = InvoiceBuilder::new(Currency::Bitcoin)
1985 .description("Test".into())
1986 .payment_hash(sha256::Hash::from_slice(&[0;32][..]).unwrap())
1987 .payment_secret(PaymentSecret([0; 32]))
1988 .duration_since_epoch(Duration::from_secs(1234567))
1991 .sign::<_, ()>(|hash| {
1992 let privkey = SecretKey::from_slice(&[41; 32]).unwrap();
1993 let secp_ctx = Secp256k1::new();
1994 Ok(secp_ctx.sign_ecdsa_recoverable(hash, &privkey))
1997 let invoice = Invoice::from_signed(signed_invoice).unwrap();
1999 assert_eq!(invoice.min_final_cltv_expiry_delta(), DEFAULT_MIN_FINAL_CLTV_EXPIRY_DELTA);
2000 assert_eq!(invoice.expiry_time(), Duration::from_secs(DEFAULT_EXPIRY_TIME));
2001 assert!(!invoice.would_expire(Duration::from_secs(1234568)));
2005 fn test_expiration() {
2007 use secp256k1::Secp256k1;
2008 use secp256k1::SecretKey;
2010 let signed_invoice = InvoiceBuilder::new(Currency::Bitcoin)
2011 .description("Test".into())
2012 .payment_hash(sha256::Hash::from_slice(&[0;32][..]).unwrap())
2013 .payment_secret(PaymentSecret([0; 32]))
2014 .duration_since_epoch(Duration::from_secs(1234567))
2017 .sign::<_, ()>(|hash| {
2018 let privkey = SecretKey::from_slice(&[41; 32]).unwrap();
2019 let secp_ctx = Secp256k1::new();
2020 Ok(secp_ctx.sign_ecdsa_recoverable(hash, &privkey))
2023 let invoice = Invoice::from_signed(signed_invoice).unwrap();
2025 assert!(invoice.would_expire(Duration::from_secs(1234567 + DEFAULT_EXPIRY_TIME + 1)));
2028 #[cfg(feature = "serde")]
2031 let invoice_str = "lnbc100p1psj9jhxdqud3jxktt5w46x7unfv9kz6mn0v3jsnp4q0d3p2sfluzdx45tqcs\
2032 h2pu5qc7lgq0xs578ngs6s0s68ua4h7cvspp5q6rmq35js88zp5dvwrv9m459tnk2zunwj5jalqtyxqulh0l\
2033 5gflssp5nf55ny5gcrfl30xuhzj3nphgj27rstekmr9fw3ny5989s300gyus9qyysgqcqpcrzjqw2sxwe993\
2034 h5pcm4dxzpvttgza8zhkqxpgffcrf5v25nwpr3cmfg7z54kuqq8rgqqqqqqqq2qqqqq9qq9qrzjqd0ylaqcl\
2035 j9424x9m8h2vcukcgnm6s56xfgu3j78zyqzhgs4hlpzvznlugqq9vsqqqqqqqlgqqqqqeqq9qrzjqwldmj9d\
2036 ha74df76zhx6l9we0vjdquygcdt3kssupehe64g6yyp5yz5rhuqqwccqqyqqqqlgqqqqjcqq9qrzjqf9e58a\
2037 guqr0rcun0ajlvmzq3ek63cw2w282gv3z5uupmuwvgjtq2z55qsqqg6qqqyqqqrtnqqqzq3cqygrzjqvphms\
2038 ywntrrhqjcraumvc4y6r8v4z5v593trte429v4hredj7ms5z52usqq9ngqqqqqqqlgqqqqqqgq9qrzjq2v0v\
2039 p62g49p7569ev48cmulecsxe59lvaw3wlxm7r982zxa9zzj7z5l0cqqxusqqyqqqqlgqqqqqzsqygarl9fh3\
2040 8s0gyuxjjgux34w75dnc6xp2l35j7es3jd4ugt3lu0xzre26yg5m7ke54n2d5sym4xcmxtl8238xxvw5h5h5\
2041 j5r6drg6k6zcqj0fcwg";
2042 let invoice = invoice_str.parse::<super::Invoice>().unwrap();
2043 let serialized_invoice = serde_json::to_string(&invoice).unwrap();
2044 let deserialized_invoice: super::Invoice = serde_json::from_str(serialized_invoice.as_str()).unwrap();
2045 assert_eq!(invoice, deserialized_invoice);
2046 assert_eq!(invoice_str, deserialized_invoice.to_string().as_str());
2047 assert_eq!(invoice_str, serialized_invoice.as_str().trim_matches('\"'));