Merge pull request #1703 from TheBlueMatt/2022-09-badonion-first-check
[rust-lightning] / lightning-invoice / src / lib.rs
index 841e3f9c69549b4a5a61e4a6e98183261b27e1db..defe958a1c05406cf8eb6cdfe409c9958c26458b 100644 (file)
@@ -1,9 +1,12 @@
+// Prefix these with `rustdoc::` when we update our MSRV to be >= 1.52 to remove warnings.
+#![deny(broken_intra_doc_links)]
+#![deny(private_intra_doc_links)]
+
 #![deny(missing_docs)]
 #![deny(non_upper_case_globals)]
 #![deny(non_camel_case_types)]
 #![deny(non_snake_case)]
 #![deny(unused_mut)]
-#![deny(broken_intra_doc_links)]
 
 #![cfg_attr(docsrs, feature(doc_auto_cfg))]
 
@@ -11,7 +14,7 @@
 #![cfg_attr(all(not(feature = "std"), not(test)), no_std)]
 
 //! This crate provides data structures to represent
-//! [lightning BOLT11](https://github.com/lightningnetwork/lightning-rfc/blob/master/11-payment-encoding.md)
+//! [lightning BOLT11](https://github.com/lightning/bolts/blob/master/11-payment-encoding.md)
 //! invoices and functions to create, encode and decode these. If you just want to use the standard
 //! en-/decoding functionality this should get you started:
 //!
@@ -25,6 +28,8 @@ compile_error!("at least one of the `std` or `no-std` features must be enabled")
 pub mod payment;
 pub mod utils;
 
+pub(crate) mod time_utils;
+
 extern crate bech32;
 extern crate bitcoin_hashes;
 #[macro_use] extern crate lightning;
@@ -33,6 +38,8 @@ extern crate secp256k1;
 extern crate alloc;
 #[cfg(any(test, feature = "std"))]
 extern crate core;
+#[cfg(feature = "serde")]
+extern crate serde;
 
 #[cfg(feature = "std")]
 use std::time::SystemTime;
@@ -43,19 +50,24 @@ use bitcoin_hashes::sha256;
 use lightning::ln::PaymentSecret;
 use lightning::ln::features::InvoiceFeatures;
 #[cfg(any(doc, test))]
-use lightning::routing::network_graph::RoutingFees;
+use lightning::routing::gossip::RoutingFees;
 use lightning::routing::router::RouteHint;
 use lightning::util::invoice::construct_invoice_preimage;
 
-use secp256k1::key::PublicKey;
+use secp256k1::PublicKey;
 use secp256k1::{Message, Secp256k1};
-use secp256k1::recovery::RecoverableSignature;
+use secp256k1::ecdsa::RecoverableSignature;
 
 use core::fmt::{Display, Formatter, self};
 use core::iter::FilterMap;
+use core::num::ParseIntError;
 use core::ops::Deref;
 use core::slice::Iter;
 use core::time::Duration;
+use core::str;
+
+#[cfg(feature = "serde")]
+use serde::{Deserialize, Deserializer,Serialize, Serializer, de::Error};
 
 mod de;
 mod ser;
@@ -86,7 +98,45 @@ mod sync {
 #[cfg(not(feature = "std"))]
 mod sync;
 
-pub use de::{ParseError, ParseOrSemanticError};
+/// Errors that indicate what is wrong with the invoice. They have some granularity for debug
+/// reasons, but should generally result in an "invalid BOLT11 invoice" message for the user.
+#[allow(missing_docs)]
+#[derive(PartialEq, Debug, Clone)]
+pub enum ParseError {
+       Bech32Error(bech32::Error),
+       ParseAmountError(ParseIntError),
+       MalformedSignature(secp256k1::Error),
+       BadPrefix,
+       UnknownCurrency,
+       UnknownSiPrefix,
+       MalformedHRP,
+       TooShortDataPart,
+       UnexpectedEndOfTaggedFields,
+       DescriptionDecodeError(str::Utf8Error),
+       PaddingError,
+       IntegerOverflowError,
+       InvalidSegWitProgramLength,
+       InvalidPubKeyHashLength,
+       InvalidScriptHashLength,
+       InvalidRecoveryId,
+       InvalidSliceLength(String),
+
+       /// Not an error, but used internally to signal that a part of the invoice should be ignored
+       /// according to BOLT11
+       Skip,
+}
+
+/// Indicates that something went wrong while parsing or validating the invoice. Parsing errors
+/// should be mostly seen as opaque and are only there for debugging reasons. Semantic errors
+/// like wrong signatures, missing fields etc. could mean that someone tampered with the invoice.
+#[derive(PartialEq, Debug, Clone)]
+pub enum ParseOrSemanticError {
+       /// The invoice couldn't be decoded
+       ParseError(ParseError),
+
+       /// The invoice could be decoded but violates the BOLT11 standard
+       SemanticError(::SemanticError),
+}
 
 /// The number of bits used to represent timestamps as defined in BOLT 11.
 const TIMESTAMP_BITS: usize = 35;
@@ -123,7 +173,7 @@ pub const DEFAULT_MIN_FINAL_CLTV_EXPIRY: u64 = 18;
 /// use bitcoin_hashes::sha256;
 ///
 /// use secp256k1::Secp256k1;
-/// use secp256k1::key::SecretKey;
+/// use secp256k1::SecretKey;
 ///
 /// use lightning::ln::PaymentSecret;
 ///
@@ -151,7 +201,7 @@ pub const DEFAULT_MIN_FINAL_CLTV_EXPIRY: u64 = 18;
 ///    .current_timestamp()
 ///    .min_final_cltv_expiry(144)
 ///    .build_signed(|hash| {
-///            Secp256k1::new().sign_recoverable(hash, &private_key)
+///            Secp256k1::new().sign_ecdsa_recoverable(hash, &private_key)
 ///    })
 ///    .unwrap();
 ///
@@ -189,7 +239,7 @@ pub struct InvoiceBuilder<D: tb::Bool, H: tb::Bool, T: tb::Bool, C: tb::Bool, S:
 ///  1. using `InvoiceBuilder`
 ///  2. using `Invoice::from_signed(SignedRawInvoice)`
 ///  3. using `str::parse::<Invoice>(&str)`
-#[derive(Eq, PartialEq, Debug, Clone)]
+#[derive(Eq, PartialEq, Debug, Clone, Hash)]
 pub struct Invoice {
        signed_invoice: SignedRawInvoice,
 }
@@ -213,7 +263,7 @@ pub enum InvoiceDescription<'f> {
 ///
 /// # Invariants
 /// The hash has to be either from the deserialized invoice or from the serialized `raw_invoice`.
-#[derive(Eq, PartialEq, Debug, Clone)]
+#[derive(Eq, PartialEq, Debug, Clone, Hash)]
 pub struct SignedRawInvoice {
        /// The rawInvoice that the signature belongs to
        raw_invoice: RawInvoice,
@@ -236,7 +286,7 @@ pub struct SignedRawInvoice {
 /// De- and encoding should not lead to information loss but may lead to different hashes.
 ///
 /// For methods without docs see the corresponding methods in `Invoice`.
-#[derive(Eq, PartialEq, Debug, Clone)]
+#[derive(Eq, PartialEq, Debug, Clone, Hash)]
 pub struct RawInvoice {
        /// human readable part
        pub hrp: RawHrp,
@@ -248,7 +298,7 @@ pub struct RawInvoice {
 /// Data of the `RawInvoice` that is encoded in the human readable part
 ///
 /// (C-not exported) As we don't yet support Option<Enum>
-#[derive(Eq, PartialEq, Debug, Clone)]
+#[derive(Eq, PartialEq, Debug, Clone, Hash)]
 pub struct RawHrp {
        /// The currency deferred from the 3rd and 4th character of the bech32 transaction
        pub currency: Currency,
@@ -261,7 +311,7 @@ pub struct RawHrp {
 }
 
 /// Data of the `RawInvoice` that is encoded in the data part
-#[derive(Eq, PartialEq, Debug, Clone)]
+#[derive(Eq, PartialEq, Debug, Clone, Hash)]
 pub struct RawDataPart {
        /// generation time of the invoice
        pub timestamp: PositiveTimestamp,
@@ -276,11 +326,11 @@ pub struct RawDataPart {
 ///
 /// The Unix timestamp representing the stored time has to be positive and no greater than
 /// [`MAX_TIMESTAMP`].
-#[derive(Eq, PartialEq, Debug, Clone)]
+#[derive(Eq, PartialEq, Debug, Clone, Hash)]
 pub struct PositiveTimestamp(Duration);
 
 /// SI prefixes for the human readable part
-#[derive(Eq, PartialEq, Debug, Clone, Copy)]
+#[derive(Eq, PartialEq, Debug, Clone, Copy, Hash)]
 pub enum SiPrefix {
        /// 10^-3
        Milli,
@@ -406,7 +456,7 @@ pub enum Fallback {
 }
 
 /// Recoverable signature
-#[derive(Clone, Debug, Eq, PartialEq)]
+#[derive(Clone, Debug, Hash, Eq, PartialEq)]
 pub struct InvoiceSignature(pub RecoverableSignature);
 
 /// Private routing information
@@ -612,9 +662,9 @@ impl<D: tb::Bool, H: tb::Bool, T: tb::Bool, S: tb::Bool> InvoiceBuilder<D, H, T,
 impl<D: tb::Bool, H: tb::Bool, T: tb::Bool, C: tb::Bool> InvoiceBuilder<D, H, T, C, tb::False> {
        /// Sets the payment secret and relevant features.
        pub fn payment_secret(mut self, payment_secret: PaymentSecret) -> InvoiceBuilder<D, H, T, C, tb::True> {
-               let features = InvoiceFeatures::empty()
-                       .set_variable_length_onion_required()
-                       .set_payment_secret_required();
+               let mut features = InvoiceFeatures::empty();
+               features.set_variable_length_onion_required();
+               features.set_payment_secret_required();
                self.tagged_fields.push(TaggedField::PaymentSecret(payment_secret));
                self.tagged_fields.push(TaggedField::Features(features));
                self.set_flags()
@@ -624,13 +674,11 @@ impl<D: tb::Bool, H: tb::Bool, T: tb::Bool, C: tb::Bool> InvoiceBuilder<D, H, T,
 impl<D: tb::Bool, H: tb::Bool, T: tb::Bool, C: tb::Bool> InvoiceBuilder<D, H, T, C, tb::True> {
        /// Sets the `basic_mpp` feature as optional.
        pub fn basic_mpp(mut self) -> Self {
-               self.tagged_fields = self.tagged_fields
-                       .drain(..)
-                       .map(|field| match field {
-                               TaggedField::Features(f) => TaggedField::Features(f.set_basic_mpp_optional()),
-                               _ => field,
-                       })
-                       .collect();
+               for field in self.tagged_fields.iter_mut() {
+                       if let TaggedField::Features(f) = field {
+                               f.set_basic_mpp_optional();
+                       }
+               }
                self
        }
 }
@@ -697,7 +745,7 @@ impl SignedRawInvoice {
        }
 
        /// The hash of the `RawInvoice` that was signed.
-       pub fn hash(&self) -> &[u8; 32] {
+       pub fn signable_hash(&self) -> &[u8; 32] {
                &self.hash
        }
 
@@ -711,7 +759,7 @@ impl SignedRawInvoice {
                let hash = Message::from_slice(&self.hash[..])
                        .expect("Hash is 32 bytes long, same as MESSAGE_SIZE");
 
-               Ok(PayeePubKey(Secp256k1::new().recover(
+               Ok(PayeePubKey(Secp256k1::new().recover_ecdsa(
                        &hash,
                        &self.signature
                )?))
@@ -738,7 +786,7 @@ impl SignedRawInvoice {
                        .expect("Hash is 32 bytes long, same as MESSAGE_SIZE");
 
                let secp_context = Secp256k1::new();
-               let verification_result = secp_context.verify(
+               let verification_result = secp_context.verify_ecdsa(
                        &hash,
                        &self.signature.to_standard(),
                        pub_key
@@ -755,18 +803,15 @@ impl SignedRawInvoice {
 /// variant. If no element was found `None` gets returned.
 ///
 /// The following example would extract the first B.
-/// ```
-/// use Enum::*
 ///
 /// enum Enum {
 ///    A(u8),
 ///    B(u16)
 /// }
 ///
-/// let elements = vec![A(1), A(2), B(3), A(4)]
+/// let elements = vec![Enum::A(1), Enum::A(2), Enum::B(3), Enum::A(4)];
 ///
-/// assert_eq!(find_extract!(elements.iter(), Enum::B(ref x), x), Some(3u16))
-/// ```
+/// assert_eq!(find_extract!(elements.iter(), Enum::B(x), x), Some(3u16));
 macro_rules! find_extract {
        ($iter:expr, $enm:pat, $enm_var:ident) => {
                find_all_extract!($iter, $enm, $enm_var).next()
@@ -777,20 +822,18 @@ macro_rules! find_extract {
 /// variant through an iterator.
 ///
 /// The following example would extract all A.
-/// ```
-/// use Enum::*
 ///
 /// enum Enum {
 ///    A(u8),
 ///    B(u16)
 /// }
 ///
-/// let elements = vec![A(1), A(2), B(3), A(4)]
+/// let elements = vec![Enum::A(1), Enum::A(2), Enum::B(3), Enum::A(4)];
 ///
 /// assert_eq!(
-///    find_all_extract!(elements.iter(), Enum::A(ref x), x).collect::<Vec<u8>>(),
-///    vec![1u8, 2u8, 4u8])
-/// ```
+///    find_all_extract!(elements.iter(), Enum::A(x), x).collect::<Vec<u8>>(),
+///    vec![1u8, 2u8, 4u8]
+/// );
 macro_rules! find_all_extract {
        ($iter:expr, $enm:pat, $enm_var:ident) => {
                $iter.filter_map(|tf| match *tf {
@@ -810,8 +853,8 @@ impl RawInvoice {
                hash
        }
 
-       /// Calculate the hash of the encoded `RawInvoice`
-       pub fn hash(&self) -> [u8; 32] {
+       /// Calculate the hash of the encoded `RawInvoice` which should be signed.
+       pub fn signable_hash(&self) -> [u8; 32] {
                use bech32::ToBase32;
 
                RawInvoice::hash_from_parts(
@@ -829,7 +872,7 @@ impl RawInvoice {
        pub fn sign<F, E>(self, sign_method: F) -> Result<SignedRawInvoice, E>
                where F: FnOnce(&Message) -> Result<RecoverableSignature, E>
        {
-               let raw_hash = self.hash();
+               let raw_hash = self.signable_hash();
                let hash = Message::from_slice(&raw_hash[..])
                        .expect("Hash is 32 bytes long, same as MESSAGE_SIZE");
                let signature = sign_method(&hash)?;
@@ -1488,6 +1531,23 @@ impl<S> Display for SignOrCreationError<S> {
        }
 }
 
+#[cfg(feature = "serde")]
+impl Serialize for Invoice {
+       fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> where S: Serializer {
+               serializer.serialize_str(self.to_string().as_str())
+       }
+}
+#[cfg(feature = "serde")]
+impl<'de> Deserialize<'de> for Invoice {
+       fn deserialize<D>(deserializer: D) -> Result<Invoice, D::Error> where D: Deserializer<'de> {
+               let bolt11 = String::deserialize(deserializer)?
+                       .parse::<Invoice>()
+                       .map_err(|e| D::Error::custom(format!("{:?}", e)))?;
+
+               Ok(bolt11)
+       }
+}
+
 #[cfg(test)]
 mod test {
        use bitcoin_hashes::hex::FromHex;
@@ -1531,15 +1591,15 @@ mod test {
                        0xd5, 0x18, 0xe1, 0xc9
                ];
 
-               assert_eq!(invoice.hash(), expected_hash)
+               assert_eq!(invoice.signable_hash(), expected_hash)
        }
 
        #[test]
        fn test_check_signature() {
                use TaggedField::*;
                use secp256k1::Secp256k1;
-               use secp256k1::recovery::{RecoveryId, RecoverableSignature};
-               use secp256k1::key::{SecretKey, PublicKey};
+               use secp256k1::ecdsa::{RecoveryId, RecoverableSignature};
+               use secp256k1::{SecretKey, PublicKey};
                use {SignedRawInvoice, InvoiceSignature, RawInvoice, RawHrp, RawDataPart, Currency, Sha256,
                         PositiveTimestamp};
 
@@ -1597,7 +1657,7 @@ mod test {
 
                let (raw_invoice, _, _) = invoice.into_parts();
                let new_signed = raw_invoice.sign::<_, ()>(|hash| {
-                       Ok(Secp256k1::new().sign_recoverable(hash, &private_key))
+                       Ok(Secp256k1::new().sign_ecdsa_recoverable(hash, &private_key))
                }).unwrap();
 
                assert!(new_signed.check_signature());
@@ -1608,7 +1668,7 @@ mod test {
                use TaggedField::*;
                use lightning::ln::features::InvoiceFeatures;
                use secp256k1::Secp256k1;
-               use secp256k1::key::SecretKey;
+               use secp256k1::SecretKey;
                use {RawInvoice, RawHrp, RawDataPart, Currency, Sha256, PositiveTimestamp, Invoice,
                         SemanticError};
 
@@ -1639,7 +1699,7 @@ mod test {
                let invoice = {
                        let mut invoice = invoice_template.clone();
                        invoice.data.tagged_fields.push(PaymentSecret(payment_secret).into());
-                       invoice.sign::<_, ()>(|hash| Ok(Secp256k1::new().sign_recoverable(hash, &private_key)))
+                       invoice.sign::<_, ()>(|hash| Ok(Secp256k1::new().sign_ecdsa_recoverable(hash, &private_key)))
                }.unwrap();
                assert_eq!(Invoice::from_signed(invoice), Err(SemanticError::InvalidFeatures));
 
@@ -1648,7 +1708,7 @@ mod test {
                        let mut invoice = invoice_template.clone();
                        invoice.data.tagged_fields.push(PaymentSecret(payment_secret).into());
                        invoice.data.tagged_fields.push(Features(InvoiceFeatures::empty()).into());
-                       invoice.sign::<_, ()>(|hash| Ok(Secp256k1::new().sign_recoverable(hash, &private_key)))
+                       invoice.sign::<_, ()>(|hash| Ok(Secp256k1::new().sign_ecdsa_recoverable(hash, &private_key)))
                }.unwrap();
                assert_eq!(Invoice::from_signed(invoice), Err(SemanticError::InvalidFeatures));
 
@@ -1657,14 +1717,14 @@ mod test {
                        let mut invoice = invoice_template.clone();
                        invoice.data.tagged_fields.push(PaymentSecret(payment_secret).into());
                        invoice.data.tagged_fields.push(Features(InvoiceFeatures::known()).into());
-                       invoice.sign::<_, ()>(|hash| Ok(Secp256k1::new().sign_recoverable(hash, &private_key)))
+                       invoice.sign::<_, ()>(|hash| Ok(Secp256k1::new().sign_ecdsa_recoverable(hash, &private_key)))
                }.unwrap();
                assert!(Invoice::from_signed(invoice).is_ok());
 
                // No payment secret or features
                let invoice = {
                        let invoice = invoice_template.clone();
-                       invoice.sign::<_, ()>(|hash| Ok(Secp256k1::new().sign_recoverable(hash, &private_key)))
+                       invoice.sign::<_, ()>(|hash| Ok(Secp256k1::new().sign_ecdsa_recoverable(hash, &private_key)))
                }.unwrap();
                assert_eq!(Invoice::from_signed(invoice), Err(SemanticError::NoPaymentSecret));
 
@@ -1672,7 +1732,7 @@ mod test {
                let invoice = {
                        let mut invoice = invoice_template.clone();
                        invoice.data.tagged_fields.push(Features(InvoiceFeatures::empty()).into());
-                       invoice.sign::<_, ()>(|hash| Ok(Secp256k1::new().sign_recoverable(hash, &private_key)))
+                       invoice.sign::<_, ()>(|hash| Ok(Secp256k1::new().sign_ecdsa_recoverable(hash, &private_key)))
                }.unwrap();
                assert_eq!(Invoice::from_signed(invoice), Err(SemanticError::NoPaymentSecret));
 
@@ -1680,7 +1740,7 @@ mod test {
                let invoice = {
                        let mut invoice = invoice_template.clone();
                        invoice.data.tagged_fields.push(Features(InvoiceFeatures::known()).into());
-                       invoice.sign::<_, ()>(|hash| Ok(Secp256k1::new().sign_recoverable(hash, &private_key)))
+                       invoice.sign::<_, ()>(|hash| Ok(Secp256k1::new().sign_ecdsa_recoverable(hash, &private_key)))
                }.unwrap();
                assert_eq!(Invoice::from_signed(invoice), Err(SemanticError::NoPaymentSecret));
 
@@ -1689,7 +1749,7 @@ mod test {
                        let mut invoice = invoice_template.clone();
                        invoice.data.tagged_fields.push(PaymentSecret(payment_secret).into());
                        invoice.data.tagged_fields.push(PaymentSecret(payment_secret).into());
-                       invoice.sign::<_, ()>(|hash| Ok(Secp256k1::new().sign_recoverable(hash, &private_key)))
+                       invoice.sign::<_, ()>(|hash| Ok(Secp256k1::new().sign_ecdsa_recoverable(hash, &private_key)))
                }.unwrap();
                assert_eq!(Invoice::from_signed(invoice), Err(SemanticError::MultiplePaymentSecrets));
        }
@@ -1726,7 +1786,7 @@ mod test {
                use ::*;
                use lightning::routing::router::RouteHintHop;
                use std::iter::FromIterator;
-               use secp256k1::key::PublicKey;
+               use secp256k1::PublicKey;
 
                let builder = InvoiceBuilder::new(Currency::Bitcoin)
                        .payment_hash(sha256::Hash::from_slice(&[0;32][..]).unwrap())
@@ -1780,7 +1840,7 @@ mod test {
                use ::*;
                use lightning::routing::router::RouteHintHop;
                use secp256k1::Secp256k1;
-               use secp256k1::key::{SecretKey, PublicKey};
+               use secp256k1::{SecretKey, PublicKey};
                use std::time::{UNIX_EPOCH, Duration};
 
                let secp_ctx = Secp256k1::new();
@@ -1859,7 +1919,7 @@ mod test {
                        .basic_mpp();
 
                let invoice = builder.clone().build_signed(|hash| {
-                       secp_ctx.sign_recoverable(hash, &private_key)
+                       secp_ctx.sign_ecdsa_recoverable(hash, &private_key)
                }).unwrap();
 
                assert!(invoice.check_signature().is_ok());
@@ -1894,7 +1954,7 @@ mod test {
        fn test_default_values() {
                use ::*;
                use secp256k1::Secp256k1;
-               use secp256k1::key::SecretKey;
+               use secp256k1::SecretKey;
 
                let signed_invoice = InvoiceBuilder::new(Currency::Bitcoin)
                        .description("Test".into())
@@ -1906,7 +1966,7 @@ mod test {
                        .sign::<_, ()>(|hash| {
                                let privkey = SecretKey::from_slice(&[41; 32]).unwrap();
                                let secp_ctx = Secp256k1::new();
-                               Ok(secp_ctx.sign_recoverable(hash, &privkey))
+                               Ok(secp_ctx.sign_ecdsa_recoverable(hash, &privkey))
                        })
                        .unwrap();
                let invoice = Invoice::from_signed(signed_invoice).unwrap();
@@ -1920,7 +1980,7 @@ mod test {
        fn test_expiration() {
                use ::*;
                use secp256k1::Secp256k1;
-               use secp256k1::key::SecretKey;
+               use secp256k1::SecretKey;
 
                let signed_invoice = InvoiceBuilder::new(Currency::Bitcoin)
                        .description("Test".into())
@@ -1932,11 +1992,33 @@ mod test {
                        .sign::<_, ()>(|hash| {
                                let privkey = SecretKey::from_slice(&[41; 32]).unwrap();
                                let secp_ctx = Secp256k1::new();
-                               Ok(secp_ctx.sign_recoverable(hash, &privkey))
+                               Ok(secp_ctx.sign_ecdsa_recoverable(hash, &privkey))
                        })
                        .unwrap();
                let invoice = Invoice::from_signed(signed_invoice).unwrap();
 
                assert!(invoice.would_expire(Duration::from_secs(1234567 + DEFAULT_EXPIRY_TIME + 1)));
        }
+
+       #[cfg(feature = "serde")]
+       #[test]
+       fn test_serde() {
+               let invoice_str = "lnbc100p1psj9jhxdqud3jxktt5w46x7unfv9kz6mn0v3jsnp4q0d3p2sfluzdx45tqcs\
+                       h2pu5qc7lgq0xs578ngs6s0s68ua4h7cvspp5q6rmq35js88zp5dvwrv9m459tnk2zunwj5jalqtyxqulh0l\
+                       5gflssp5nf55ny5gcrfl30xuhzj3nphgj27rstekmr9fw3ny5989s300gyus9qyysgqcqpcrzjqw2sxwe993\
+                       h5pcm4dxzpvttgza8zhkqxpgffcrf5v25nwpr3cmfg7z54kuqq8rgqqqqqqqq2qqqqq9qq9qrzjqd0ylaqcl\
+                       j9424x9m8h2vcukcgnm6s56xfgu3j78zyqzhgs4hlpzvznlugqq9vsqqqqqqqlgqqqqqeqq9qrzjqwldmj9d\
+                       ha74df76zhx6l9we0vjdquygcdt3kssupehe64g6yyp5yz5rhuqqwccqqyqqqqlgqqqqjcqq9qrzjqf9e58a\
+                       guqr0rcun0ajlvmzq3ek63cw2w282gv3z5uupmuwvgjtq2z55qsqqg6qqqyqqqrtnqqqzq3cqygrzjqvphms\
+                       ywntrrhqjcraumvc4y6r8v4z5v593trte429v4hredj7ms5z52usqq9ngqqqqqqqlgqqqqqqgq9qrzjq2v0v\
+                       p62g49p7569ev48cmulecsxe59lvaw3wlxm7r982zxa9zzj7z5l0cqqxusqqyqqqqlgqqqqqzsqygarl9fh3\
+                       8s0gyuxjjgux34w75dnc6xp2l35j7es3jd4ugt3lu0xzre26yg5m7ke54n2d5sym4xcmxtl8238xxvw5h5h5\
+                       j5r6drg6k6zcqj0fcwg";
+               let invoice = invoice_str.parse::<super::Invoice>().unwrap();
+               let serialized_invoice = serde_json::to_string(&invoice).unwrap();
+               let deserialized_invoice: super::Invoice = serde_json::from_str(serialized_invoice.as_str()).unwrap();
+               assert_eq!(invoice, deserialized_invoice);
+               assert_eq!(invoice_str, deserialized_invoice.to_string().as_str());
+               assert_eq!(invoice_str, serialized_invoice.as_str().trim_matches('\"'));
+       }
 }