cashu/nuts/
nut02.rs

1//! NUT-02: Keysets and keyset ID
2//!
3//! <https://github.com/cashubtc/nuts/blob/main/02.md>
4
5use core::fmt;
6use core::str::FromStr;
7use std::array::TryFromSliceError;
8#[cfg(feature = "mint")]
9use std::collections::BTreeMap;
10
11#[cfg(feature = "mint")]
12use bitcoin::bip32::{ChildNumber, DerivationPath, Xpriv};
13use bitcoin::hashes::sha256::Hash as Sha256;
14use bitcoin::hashes::Hash;
15#[cfg(feature = "mint")]
16use bitcoin::key::Secp256k1;
17#[cfg(feature = "mint")]
18use bitcoin::secp256k1;
19use serde::{Deserialize, Deserializer, Serialize};
20use serde_with::{serde_as, VecSkipError};
21use thiserror::Error;
22
23use super::nut01::Keys;
24#[cfg(feature = "mint")]
25use super::nut01::{MintKeyPair, MintKeys};
26use crate::nuts::nut00::CurrencyUnit;
27use crate::util::hex;
28use crate::{ensure_cdk, Amount};
29
30/// NUT02 Error
31#[derive(Debug, Error)]
32pub enum Error {
33    /// Hex Error
34    #[error(transparent)]
35    HexError(#[from] hex::Error),
36    /// Keyset length error
37    #[error("NUT02: ID length invalid")]
38    Length,
39    /// Unknown version
40    #[error("NUT02: Unknown Version")]
41    UnknownVersion,
42    /// Keyset id does not match
43    #[error("Keyset id incorrect")]
44    IncorrectKeysetId,
45    /// Slice Error
46    #[error(transparent)]
47    Slice(#[from] TryFromSliceError),
48}
49
50/// Keyset version
51#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
52#[cfg_attr(feature = "swagger", derive(utoipa::ToSchema))]
53pub enum KeySetVersion {
54    /// Current Version 00
55    Version00,
56}
57
58impl KeySetVersion {
59    /// [`KeySetVersion`] to byte
60    pub fn to_byte(&self) -> u8 {
61        match self {
62            Self::Version00 => 0,
63        }
64    }
65
66    /// [`KeySetVersion`] from byte
67    pub fn from_byte(byte: &u8) -> Result<Self, Error> {
68        match byte {
69            0 => Ok(Self::Version00),
70            _ => Err(Error::UnknownVersion),
71        }
72    }
73}
74
75impl fmt::Display for KeySetVersion {
76    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
77        match self {
78            KeySetVersion::Version00 => f.write_str("00"),
79        }
80    }
81}
82
83/// A keyset ID is an identifier for a specific keyset. It can be derived by
84/// anyone who knows the set of public keys of a mint. The keyset ID **CAN**
85/// be stored in a Cashu token such that the token can be used to identify
86/// which mint or keyset it was generated from.
87#[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash, Serialize, Deserialize)]
88#[serde(into = "String", try_from = "String")]
89#[cfg_attr(feature = "swagger", derive(utoipa::ToSchema))]
90pub struct Id {
91    version: KeySetVersion,
92    id: [u8; Self::BYTELEN],
93}
94
95impl Id {
96    const STRLEN: usize = 14;
97    const BYTELEN: usize = 7;
98
99    /// [`Id`] to bytes
100    pub fn to_bytes(&self) -> Vec<u8> {
101        [vec![self.version.to_byte()], self.id.to_vec()].concat()
102    }
103
104    /// [`Id`] from bytes
105    pub fn from_bytes(bytes: &[u8]) -> Result<Self, Error> {
106        Ok(Self {
107            version: KeySetVersion::from_byte(&bytes[0])?,
108            id: bytes[1..].try_into()?,
109        })
110    }
111
112    /// [`Id`] as bytes
113    pub fn as_bytes(&self) -> [u8; Self::BYTELEN + 1] {
114        let mut bytes = [0u8; Self::BYTELEN + 1];
115        bytes[0] = self.version.to_byte();
116        bytes[1..].copy_from_slice(&self.id);
117        bytes
118    }
119}
120
121// Used to generate a compressed unique identifier as part of the NUT13 spec
122// This is a one-way function
123impl From<Id> for u32 {
124    fn from(value: Id) -> Self {
125        let hex_bytes: [u8; 8] = value.as_bytes();
126
127        let int = u64::from_be_bytes(hex_bytes);
128
129        (int % (2_u64.pow(31) - 1)) as u32
130    }
131}
132
133impl fmt::Display for Id {
134    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
135        f.write_str(&format!("{}{}", self.version, hex::encode(self.id)))
136    }
137}
138
139impl fmt::Debug for Id {
140    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
141        f.write_str(&format!("{}{}", self.version, hex::encode(self.id)))
142    }
143}
144
145impl TryFrom<String> for Id {
146    type Error = Error;
147
148    fn try_from(s: String) -> Result<Self, Self::Error> {
149        ensure_cdk!(s.len() == 16, Error::Length);
150
151        Ok(Self {
152            version: KeySetVersion::from_byte(&hex::decode(&s[..2])?[0])?,
153            id: hex::decode(&s[2..])?
154                .try_into()
155                .map_err(|_| Error::Length)?,
156        })
157    }
158}
159
160impl FromStr for Id {
161    type Err = Error;
162
163    fn from_str(s: &str) -> Result<Self, Self::Err> {
164        Self::try_from(s.to_string())
165    }
166}
167
168impl From<Id> for String {
169    fn from(value: Id) -> Self {
170        value.to_string()
171    }
172}
173
174impl From<&Keys> for Id {
175    /// As per NUT-02:
176    ///   1. sort public keys by their amount in ascending order
177    ///   2. concatenate all public keys to one string
178    ///   3. HASH_SHA256 the concatenated public keys
179    ///   4. take the first 14 characters of the hex-encoded hash
180    ///   5. prefix it with a keyset ID version byte
181    fn from(map: &Keys) -> Self {
182        let mut keys: Vec<(&Amount, &super::PublicKey)> = map.iter().collect();
183        keys.sort_by_key(|(amt, _v)| *amt);
184
185        let pubkeys_concat: Vec<u8> = keys
186            .iter()
187            .map(|(_, pubkey)| pubkey.to_bytes())
188            .collect::<Vec<[u8; 33]>>()
189            .concat();
190
191        let hash = Sha256::hash(&pubkeys_concat);
192        let hex_of_hash = hex::encode(hash.to_byte_array());
193
194        Self {
195            version: KeySetVersion::Version00,
196            id: hex::decode(&hex_of_hash[0..Self::STRLEN])
197                .expect("Keys hash could not be hex decoded")
198                .try_into()
199                .expect("Invalid length of hex id"),
200        }
201    }
202}
203
204/// Mint Keysets [NUT-02]
205/// Ids of mints keyset ids
206#[serde_as]
207#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
208#[cfg_attr(feature = "swagger", derive(utoipa::ToSchema))]
209pub struct KeysetResponse {
210    /// set of public key ids that the mint generates
211    #[serde_as(as = "VecSkipError<_>")]
212    pub keysets: Vec<KeySetInfo>,
213}
214
215/// Keyset
216#[derive(Debug, Clone, PartialEq, Eq, Deserialize, Serialize)]
217#[cfg_attr(feature = "swagger", derive(utoipa::ToSchema))]
218pub struct KeySet {
219    /// Keyset [`Id`]
220    #[cfg_attr(feature = "swagger", schema(value_type = String))]
221    pub id: Id,
222    /// Keyset [`CurrencyUnit`]
223    pub unit: CurrencyUnit,
224    /// Keyset [`Keys`]
225    pub keys: Keys,
226}
227
228impl KeySet {
229    /// Verify the keyset is matches keys
230    pub fn verify_id(&self) -> Result<(), Error> {
231        let keys_id: Id = (&self.keys).into();
232
233        ensure_cdk!(keys_id == self.id, Error::IncorrectKeysetId);
234
235        Ok(())
236    }
237}
238
239#[cfg(feature = "mint")]
240impl From<MintKeySet> for KeySet {
241    fn from(keyset: MintKeySet) -> Self {
242        Self {
243            id: keyset.id,
244            unit: keyset.unit,
245            keys: Keys::from(keyset.keys),
246        }
247    }
248}
249
250/// KeySetInfo
251#[derive(Debug, Clone, Hash, PartialEq, Eq, Deserialize, Serialize)]
252#[cfg_attr(feature = "swagger", derive(utoipa::ToSchema))]
253pub struct KeySetInfo {
254    /// Keyset [`Id`]
255    #[cfg_attr(feature = "swagger", schema(value_type = String))]
256    pub id: Id,
257    /// Keyset [`CurrencyUnit`]
258    pub unit: CurrencyUnit,
259    /// Keyset state
260    /// Mint will only sign from an active keyset
261    pub active: bool,
262    /// Input Fee PPK
263    #[serde(
264        deserialize_with = "deserialize_input_fee_ppk",
265        default = "default_input_fee_ppk"
266    )]
267    pub input_fee_ppk: u64,
268}
269
270fn deserialize_input_fee_ppk<'de, D>(deserializer: D) -> Result<u64, D::Error>
271where
272    D: Deserializer<'de>,
273{
274    // This will either give us a u64 or null (which becomes None)
275    let opt = Option::<u64>::deserialize(deserializer)?;
276    Ok(opt.unwrap_or_else(default_input_fee_ppk))
277}
278
279fn default_input_fee_ppk() -> u64 {
280    0
281}
282
283#[cfg(feature = "mint")]
284/// MintKeyset
285#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
286pub struct MintKeySet {
287    /// Keyset [`Id`]
288    pub id: Id,
289    /// Keyset [`CurrencyUnit`]
290    pub unit: CurrencyUnit,
291    /// Keyset [`MintKeys`]
292    pub keys: MintKeys,
293}
294
295#[cfg(feature = "mint")]
296impl MintKeySet {
297    /// Generate new [`MintKeySet`]
298    pub fn generate<C: secp256k1::Signing>(
299        secp: &Secp256k1<C>,
300        xpriv: Xpriv,
301        unit: CurrencyUnit,
302        max_order: u8,
303    ) -> Self {
304        let mut map = BTreeMap::new();
305        for i in 0..max_order {
306            let amount = Amount::from(2_u64.pow(i as u32));
307            let secret_key = xpriv
308                .derive_priv(
309                    secp,
310                    &[ChildNumber::from_hardened_idx(i as u32).expect("order is valid index")],
311                )
312                .expect("RNG busted")
313                .private_key;
314            let public_key = secret_key.public_key(secp);
315            map.insert(
316                amount,
317                MintKeyPair {
318                    secret_key: secret_key.into(),
319                    public_key: public_key.into(),
320                },
321            );
322        }
323
324        let keys = MintKeys::new(map);
325        Self {
326            id: (&keys).into(),
327            unit,
328            keys,
329        }
330    }
331
332    /// Generate new [`MintKeySet`] from seed
333    pub fn generate_from_seed<C: secp256k1::Signing>(
334        secp: &Secp256k1<C>,
335        seed: &[u8],
336        max_order: u8,
337        currency_unit: CurrencyUnit,
338        derivation_path: DerivationPath,
339    ) -> Self {
340        let xpriv = Xpriv::new_master(bitcoin::Network::Bitcoin, seed).expect("RNG busted");
341        Self::generate(
342            secp,
343            xpriv
344                .derive_priv(secp, &derivation_path)
345                .expect("RNG busted"),
346            currency_unit,
347            max_order,
348        )
349    }
350
351    /// Generate new [`MintKeySet`] from xpriv
352    pub fn generate_from_xpriv<C: secp256k1::Signing>(
353        secp: &Secp256k1<C>,
354        xpriv: Xpriv,
355        max_order: u8,
356        currency_unit: CurrencyUnit,
357        derivation_path: DerivationPath,
358    ) -> Self {
359        Self::generate(
360            secp,
361            xpriv
362                .derive_priv(secp, &derivation_path)
363                .expect("RNG busted"),
364            currency_unit,
365            max_order,
366        )
367    }
368}
369
370#[cfg(feature = "mint")]
371impl From<MintKeySet> for Id {
372    fn from(keyset: MintKeySet) -> Id {
373        let keys: super::KeySet = keyset.into();
374
375        Id::from(&keys.keys)
376    }
377}
378
379#[cfg(feature = "mint")]
380impl From<&MintKeys> for Id {
381    fn from(map: &MintKeys) -> Self {
382        let keys: super::Keys = map.clone().into();
383
384        Id::from(&keys)
385    }
386}
387
388#[cfg(test)]
389mod test {
390    use std::str::FromStr;
391
392    use bitcoin::secp256k1::rand::{self, RngCore};
393
394    use super::{KeySetInfo, Keys, KeysetResponse};
395    use crate::nuts::nut02::{Error, Id};
396    use crate::nuts::KeysResponse;
397    use crate::util::hex;
398
399    const SHORT_KEYSET_ID: &str = "00456a94ab4e1c46";
400    const SHORT_KEYSET: &str = r#"
401        {
402            "1":"03a40f20667ed53513075dc51e715ff2046cad64eb68960632269ba7f0210e38bc",
403            "2":"03fd4ce5a16b65576145949e6f99f445f8249fee17c606b688b504a849cdc452de",
404            "4":"02648eccfa4c026960966276fa5a4cae46ce0fd432211a4f449bf84f13aa5f8303",
405            "8":"02fdfd6796bfeac490cbee12f778f867f0a2c68f6508d17c649759ea0dc3547528"
406        }
407    "#;
408
409    const KEYSET_ID: &str = "000f01df73ea149a";
410    const KEYSET: &str = r#"
411        {
412            "1":"03ba786a2c0745f8c30e490288acd7a72dd53d65afd292ddefa326a4a3fa14c566",
413            "2":"03361cd8bd1329fea797a6add1cf1990ffcf2270ceb9fc81eeee0e8e9c1bd0cdf5",
414            "4":"036e378bcf78738ddf68859293c69778035740e41138ab183c94f8fee7572214c7",
415            "8":"03909d73beaf28edfb283dbeb8da321afd40651e8902fcf5454ecc7d69788626c0",
416            "16":"028a36f0e6638ea7466665fe174d958212723019ec08f9ce6898d897f88e68aa5d",
417            "32":"03a97a40e146adee2687ac60c2ba2586a90f970de92a9d0e6cae5a4b9965f54612",
418            "64":"03ce86f0c197aab181ddba0cfc5c5576e11dfd5164d9f3d4a3fc3ffbbf2e069664",
419            "128":"0284f2c06d938a6f78794814c687560a0aabab19fe5e6f30ede38e113b132a3cb9",
420            "256":"03b99f475b68e5b4c0ba809cdecaae64eade2d9787aa123206f91cd61f76c01459",
421            "512":"03d4db82ea19a44d35274de51f78af0a710925fe7d9e03620b84e3e9976e3ac2eb",
422            "1024":"031fbd4ba801870871d46cf62228a1b748905ebc07d3b210daf48de229e683f2dc",
423            "2048":"0276cedb9a3b160db6a158ad4e468d2437f021293204b3cd4bf6247970d8aff54b",
424            "4096":"02fc6b89b403ee9eb8a7ed457cd3973638080d6e04ca8af7307c965c166b555ea2",
425            "8192":"0320265583e916d3a305f0d2687fcf2cd4e3cd03a16ea8261fda309c3ec5721e21",
426            "16384":"036e41de58fdff3cb1d8d713f48c63bc61fa3b3e1631495a444d178363c0d2ed50",
427            "32768":"0365438f613f19696264300b069d1dad93f0c60a37536b72a8ab7c7366a5ee6c04",
428            "65536":"02408426cfb6fc86341bac79624ba8708a4376b2d92debdf4134813f866eb57a8d",
429            "131072":"031063e9f11c94dc778c473e968966eac0e70b7145213fbaff5f7a007e71c65f41",
430            "262144":"02f2a3e808f9cd168ec71b7f328258d0c1dda250659c1aced14c7f5cf05aab4328",
431            "524288":"038ac10de9f1ff9395903bb73077e94dbf91e9ef98fd77d9a2debc5f74c575bc86",
432            "1048576":"0203eaee4db749b0fc7c49870d082024b2c31d889f9bc3b32473d4f1dfa3625788",
433            "2097152":"033cdb9d36e1e82ae652b7b6a08e0204569ec7ff9ebf85d80a02786dc7fe00b04c",
434            "4194304":"02c8b73f4e3a470ae05e5f2fe39984d41e9f6ae7be9f3b09c9ac31292e403ac512",
435            "8388608":"025bbe0cfce8a1f4fbd7f3a0d4a09cb6badd73ef61829dc827aa8a98c270bc25b0",
436            "16777216":"037eec3d1651a30a90182d9287a5c51386fe35d4a96839cf7969c6e2a03db1fc21",
437            "33554432":"03280576b81a04e6abd7197f305506476f5751356b7643988495ca5c3e14e5c262",
438            "67108864":"03268bfb05be1dbb33ab6e7e00e438373ca2c9b9abc018fdb452d0e1a0935e10d3",
439            "134217728":"02573b68784ceba9617bbcc7c9487836d296aa7c628c3199173a841e7a19798020",
440            "268435456":"0234076b6e70f7fbf755d2227ecc8d8169d662518ee3a1401f729e2a12ccb2b276",
441            "536870912":"03015bd88961e2a466a2163bd4248d1d2b42c7c58a157e594785e7eb34d880efc9",
442            "1073741824":"02c9b076d08f9020ebee49ac8ba2610b404d4e553a4f800150ceb539e9421aaeee",
443            "2147483648":"034d592f4c366afddc919a509600af81b489a03caf4f7517c2b3f4f2b558f9a41a",
444            "4294967296":"037c09ecb66da082981e4cbdb1ac65c0eb631fc75d85bed13efb2c6364148879b5",
445            "8589934592":"02b4ebb0dda3b9ad83b39e2e31024b777cc0ac205a96b9a6cfab3edea2912ed1b3",
446            "17179869184":"026cc4dacdced45e63f6e4f62edbc5779ccd802e7fabb82d5123db879b636176e9",
447            "34359738368":"02b2cee01b7d8e90180254459b8f09bbea9aad34c3a2fd98c85517ecfc9805af75",
448            "68719476736":"037a0c0d564540fc574b8bfa0253cca987b75466e44b295ed59f6f8bd41aace754",
449            "137438953472":"021df6585cae9b9ca431318a713fd73dbb76b3ef5667957e8633bca8aaa7214fb6",
450            "274877906944":"02b8f53dde126f8c85fa5bb6061c0be5aca90984ce9b902966941caf963648d53a",
451            "549755813888":"029cc8af2840d59f1d8761779b2496623c82c64be8e15f9ab577c657c6dd453785",
452            "1099511627776":"03e446fdb84fad492ff3a25fc1046fb9a93a5b262ebcd0151caa442ea28959a38a",
453            "2199023255552":"02d6b25bd4ab599dd0818c55f75702fde603c93f259222001246569018842d3258",
454            "4398046511104":"03397b522bb4e156ec3952d3f048e5a986c20a00718e5e52cd5718466bf494156a",
455            "8796093022208":"02d1fb9e78262b5d7d74028073075b80bb5ab281edcfc3191061962c1346340f1e",
456            "17592186044416":"030d3f2ad7a4ca115712ff7f140434f802b19a4c9b2dd1c76f3e8e80c05c6a9310",
457            "35184372088832":"03e325b691f292e1dfb151c3fb7cad440b225795583c32e24e10635a80e4221c06",
458            "70368744177664":"03bee8f64d88de3dee21d61f89efa32933da51152ddbd67466bef815e9f93f8fd1",
459            "140737488355328":"0327244c9019a4892e1f04ba3bf95fe43b327479e2d57c25979446cc508cd379ed",
460            "281474976710656":"02fb58522cd662f2f8b042f8161caae6e45de98283f74d4e99f19b0ea85e08a56d",
461            "562949953421312":"02adde4b466a9d7e59386b6a701a39717c53f30c4810613c1b55e6b6da43b7bc9a",
462            "1125899906842624":"038eeda11f78ce05c774f30e393cda075192b890d68590813ff46362548528dca9",
463            "2251799813685248":"02ec13e0058b196db80f7079d329333b330dc30c000dbdd7397cbbc5a37a664c4f",
464            "4503599627370496":"02d2d162db63675bd04f7d56df04508840f41e2ad87312a3c93041b494efe80a73",
465            "9007199254740992":"0356969d6aef2bb40121dbd07c68b6102339f4ea8e674a9008bb69506795998f49",
466            "18014398509481984":"02f4e667567ebb9f4e6e180a4113bb071c48855f657766bb5e9c776a880335d1d6",
467            "36028797018963968":"0385b4fe35e41703d7a657d957c67bb536629de57b7e6ee6fe2130728ef0fc90b0",
468            "72057594037927936":"02b2bc1968a6fddbcc78fb9903940524824b5f5bed329c6ad48a19b56068c144fd",
469            "144115188075855872":"02e0dbb24f1d288a693e8a49bc14264d1276be16972131520cf9e055ae92fba19a",
470            "288230376151711744":"03efe75c106f931a525dc2d653ebedddc413a2c7d8cb9da410893ae7d2fa7d19cc",
471            "576460752303423488":"02c7ec2bd9508a7fc03f73c7565dc600b30fd86f3d305f8f139c45c404a52d958a",
472            "1152921504606846976":"035a6679c6b25e68ff4e29d1c7ef87f21e0a8fc574f6a08c1aa45ff352c1d59f06",
473            "2305843009213693952":"033cdc225962c052d485f7cfbf55a5b2367d200fe1fe4373a347deb4cc99e9a099",
474            "4611686018427387904":"024a4b806cf413d14b294719090a9da36ba75209c7657135ad09bc65328fba9e6f",
475            "9223372036854775808":"0377a6fe114e291a8d8e991627c38001c8305b23b9e98b1c7b1893f5cd0dda6cad"
476        }
477    "#;
478
479    #[test]
480    fn test_deserialization_and_id_generation() {
481        let _id = Id::from_str("009a1f293253e41e").unwrap();
482
483        let keys: Keys = serde_json::from_str(SHORT_KEYSET).unwrap();
484
485        let id: Id = (&keys).into();
486
487        assert_eq!(id, Id::from_str(SHORT_KEYSET_ID).unwrap());
488
489        let keys: Keys = serde_json::from_str(KEYSET).unwrap();
490
491        let id: Id = (&keys).into();
492
493        assert_eq!(id, Id::from_str(KEYSET_ID).unwrap());
494    }
495
496    #[test]
497    fn test_deserialization_keyset_info() {
498        let h = r#"{"id":"009a1f293253e41e","unit":"sat","active":true}"#;
499
500        let _keyset_response: KeySetInfo = serde_json::from_str(h).unwrap();
501
502        let h = r#"{"id":"009a1f293253e41e","unit":"sat","active":true, "input_fee_ppk":null}"#;
503
504        let _keyset_response: KeySetInfo = serde_json::from_str(h).unwrap();
505    }
506
507    #[test]
508    fn test_deserialization_of_keyset_response() {
509        let h = r#"{"keysets":[{"id":"009a1f293253e41e","unit":"sat","active":true, "input_fee_ppk": 100},{"id":"eGnEWtdJ0PIM","unit":"sat","active":true},{"id":"003dfdf4e5e35487","unit":"sat","active":true},{"id":"0066ad1a4b6fc57c","unit":"sat","active":true},{"id":"00f7ca24d44c3e5e","unit":"sat","active":true},{"id":"001fcea2931f2d85","unit":"sat","active":true},{"id":"00d095959d940edb","unit":"sat","active":true},{"id":"000d7f730d657125","unit":"sat","active":true},{"id":"0007208d861d7295","unit":"sat","active":true},{"id":"00bfdf8889b719dd","unit":"sat","active":true},{"id":"00ca9b17da045f21","unit":"sat","active":true}]}"#;
510
511        let _keyset_response: KeysetResponse = serde_json::from_str(h).unwrap();
512    }
513
514    #[test]
515    fn test_to_int() {
516        let id = Id::from_str("009a1f293253e41e").unwrap();
517
518        let id_int = u32::from(id);
519        assert_eq!(864559728, id_int)
520    }
521
522    #[test]
523    fn test_id_from_invalid_byte_length() {
524        let three_bytes = [0x01, 0x02, 0x03];
525        let result = Id::from_bytes(&three_bytes);
526        assert!(result.is_err(), "Expected an invalid byte length error");
527    }
528
529    #[test]
530    fn test_keyset_bytes() {
531        let id = Id::from_str("009a1f293253e41e").unwrap();
532
533        let id_bytes = id.to_bytes();
534
535        assert_eq!(id_bytes.len(), 8);
536
537        let id_from_bytes = Id::from_bytes(&id_bytes).unwrap();
538
539        assert_eq!(id_from_bytes, id);
540    }
541
542    #[test]
543    fn test_deserialization_keys_response() {
544        let keys = r#"{"keysets":[{"id":"I2yN+iRYfkzT","unit":"sat","keys":{"1":"03ba786a2c0745f8c30e490288acd7a72dd53d65afd292ddefa326a4a3fa14c566","2":"03361cd8bd1329fea797a6add1cf1990ffcf2270ceb9fc81eeee0e8e9c1bd0cdf5","4":"036e378bcf78738ddf68859293c69778035740e41138ab183c94f8fee7572214c7","8":"03909d73beaf28edfb283dbeb8da321afd40651e8902fcf5454ecc7d69788626c0","16":"028a36f0e6638ea7466665fe174d958212723019ec08f9ce6898d897f88e68aa5d","32":"03a97a40e146adee2687ac60c2ba2586a90f970de92a9d0e6cae5a4b9965f54612","64":"03ce86f0c197aab181ddba0cfc5c5576e11dfd5164d9f3d4a3fc3ffbbf2e069664","128":"0284f2c06d938a6f78794814c687560a0aabab19fe5e6f30ede38e113b132a3cb9","256":"03b99f475b68e5b4c0ba809cdecaae64eade2d9787aa123206f91cd61f76c01459","512":"03d4db82ea19a44d35274de51f78af0a710925fe7d9e03620b84e3e9976e3ac2eb","1024":"031fbd4ba801870871d46cf62228a1b748905ebc07d3b210daf48de229e683f2dc","2048":"0276cedb9a3b160db6a158ad4e468d2437f021293204b3cd4bf6247970d8aff54b","4096":"02fc6b89b403ee9eb8a7ed457cd3973638080d6e04ca8af7307c965c166b555ea2","8192":"0320265583e916d3a305f0d2687fcf2cd4e3cd03a16ea8261fda309c3ec5721e21","16384":"036e41de58fdff3cb1d8d713f48c63bc61fa3b3e1631495a444d178363c0d2ed50","32768":"0365438f613f19696264300b069d1dad93f0c60a37536b72a8ab7c7366a5ee6c04","65536":"02408426cfb6fc86341bac79624ba8708a4376b2d92debdf4134813f866eb57a8d","131072":"031063e9f11c94dc778c473e968966eac0e70b7145213fbaff5f7a007e71c65f41","262144":"02f2a3e808f9cd168ec71b7f328258d0c1dda250659c1aced14c7f5cf05aab4328","524288":"038ac10de9f1ff9395903bb73077e94dbf91e9ef98fd77d9a2debc5f74c575bc86","1048576":"0203eaee4db749b0fc7c49870d082024b2c31d889f9bc3b32473d4f1dfa3625788","2097152":"033cdb9d36e1e82ae652b7b6a08e0204569ec7ff9ebf85d80a02786dc7fe00b04c","4194304":"02c8b73f4e3a470ae05e5f2fe39984d41e9f6ae7be9f3b09c9ac31292e403ac512","8388608":"025bbe0cfce8a1f4fbd7f3a0d4a09cb6badd73ef61829dc827aa8a98c270bc25b0","16777216":"037eec3d1651a30a90182d9287a5c51386fe35d4a96839cf7969c6e2a03db1fc21","33554432":"03280576b81a04e6abd7197f305506476f5751356b7643988495ca5c3e14e5c262","67108864":"03268bfb05be1dbb33ab6e7e00e438373ca2c9b9abc018fdb452d0e1a0935e10d3","134217728":"02573b68784ceba9617bbcc7c9487836d296aa7c628c3199173a841e7a19798020","268435456":"0234076b6e70f7fbf755d2227ecc8d8169d662518ee3a1401f729e2a12ccb2b276","536870912":"03015bd88961e2a466a2163bd4248d1d2b42c7c58a157e594785e7eb34d880efc9","1073741824":"02c9b076d08f9020ebee49ac8ba2610b404d4e553a4f800150ceb539e9421aaeee","2147483648":"034d592f4c366afddc919a509600af81b489a03caf4f7517c2b3f4f2b558f9a41a","4294967296":"037c09ecb66da082981e4cbdb1ac65c0eb631fc75d85bed13efb2c6364148879b5","8589934592":"02b4ebb0dda3b9ad83b39e2e31024b777cc0ac205a96b9a6cfab3edea2912ed1b3","17179869184":"026cc4dacdced45e63f6e4f62edbc5779ccd802e7fabb82d5123db879b636176e9","34359738368":"02b2cee01b7d8e90180254459b8f09bbea9aad34c3a2fd98c85517ecfc9805af75","68719476736":"037a0c0d564540fc574b8bfa0253cca987b75466e44b295ed59f6f8bd41aace754","137438953472":"021df6585cae9b9ca431318a713fd73dbb76b3ef5667957e8633bca8aaa7214fb6","274877906944":"02b8f53dde126f8c85fa5bb6061c0be5aca90984ce9b902966941caf963648d53a","549755813888":"029cc8af2840d59f1d8761779b2496623c82c64be8e15f9ab577c657c6dd453785","1099511627776":"03e446fdb84fad492ff3a25fc1046fb9a93a5b262ebcd0151caa442ea28959a38a","2199023255552":"02d6b25bd4ab599dd0818c55f75702fde603c93f259222001246569018842d3258","4398046511104":"03397b522bb4e156ec3952d3f048e5a986c20a00718e5e52cd5718466bf494156a","8796093022208":"02d1fb9e78262b5d7d74028073075b80bb5ab281edcfc3191061962c1346340f1e","17592186044416":"030d3f2ad7a4ca115712ff7f140434f802b19a4c9b2dd1c76f3e8e80c05c6a9310","35184372088832":"03e325b691f292e1dfb151c3fb7cad440b225795583c32e24e10635a80e4221c06","70368744177664":"03bee8f64d88de3dee21d61f89efa32933da51152ddbd67466bef815e9f93f8fd1","140737488355328":"0327244c9019a4892e1f04ba3bf95fe43b327479e2d57c25979446cc508cd379ed","281474976710656":"02fb58522cd662f2f8b042f8161caae6e45de98283f74d4e99f19b0ea85e08a56d","562949953421312":"02adde4b466a9d7e59386b6a701a39717c53f30c4810613c1b55e6b6da43b7bc9a","1125899906842624":"038eeda11f78ce05c774f30e393cda075192b890d68590813ff46362548528dca9","2251799813685248":"02ec13e0058b196db80f7079d329333b330dc30c000dbdd7397cbbc5a37a664c4f","4503599627370496":"02d2d162db63675bd04f7d56df04508840f41e2ad87312a3c93041b494efe80a73","9007199254740992":"0356969d6aef2bb40121dbd07c68b6102339f4ea8e674a9008bb69506795998f49","18014398509481984":"02f4e667567ebb9f4e6e180a4113bb071c48855f657766bb5e9c776a880335d1d6","36028797018963968":"0385b4fe35e41703d7a657d957c67bb536629de57b7e6ee6fe2130728ef0fc90b0","72057594037927936":"02b2bc1968a6fddbcc78fb9903940524824b5f5bed329c6ad48a19b56068c144fd","144115188075855872":"02e0dbb24f1d288a693e8a49bc14264d1276be16972131520cf9e055ae92fba19a","288230376151711744":"03efe75c106f931a525dc2d653ebedddc413a2c7d8cb9da410893ae7d2fa7d19cc","576460752303423488":"02c7ec2bd9508a7fc03f73c7565dc600b30fd86f3d305f8f139c45c404a52d958a","1152921504606846976":"035a6679c6b25e68ff4e29d1c7ef87f21e0a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545
546        let keys_response: KeysResponse = serde_json::from_str(keys).unwrap();
547
548        assert_eq!(keys_response.keysets.len(), 2);
549    }
550
551    fn generate_random_id() -> Id {
552        let mut rand_bytes = vec![0u8; 8];
553        rand::thread_rng().fill_bytes(&mut rand_bytes[1..]);
554        Id::from_bytes(&rand_bytes)
555            .unwrap_or_else(|e| panic!("Failed to create Id from {}: {e}", hex::encode(rand_bytes)))
556    }
557
558    #[test]
559    fn test_id_serialization() {
560        let id = generate_random_id();
561        let id_str = id.to_string();
562
563        assert!(id_str.chars().all(|c| c.is_ascii_hexdigit()));
564        assert_eq!(16, id_str.len());
565        assert_eq!(id_str.to_lowercase(), id_str);
566    }
567
568    #[test]
569    fn test_id_deserialization() {
570        let id_from_short_str = Id::from_str("00123");
571        assert!(matches!(id_from_short_str, Err(Error::Length)));
572
573        let id_from_non_hex_str = Id::from_str(&SHORT_KEYSET_ID.replace('a', "x"));
574        assert!(matches!(id_from_non_hex_str, Err(Error::HexError(_))));
575
576        let id_invalid_version = Id::from_str(&SHORT_KEYSET_ID.replace("00", "99"));
577        assert!(matches!(id_invalid_version, Err(Error::UnknownVersion)));
578
579        let id_from_uppercase = Id::from_str(&SHORT_KEYSET_ID.to_uppercase());
580        assert!(id_from_uppercase.is_ok());
581    }
582}
cashu/nuts/nut02.rs

cashu/nuts/
nut02.rs
