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    /// Short keyset id does not match any of the provided IDv2s
46    #[error("Short keyset id does not match any of the provided IDv2s")]
47    UnknownShortKeysetId,
48    /// Short keyset id is ill-formed
49    #[error("Short keyset id is ill-formed")]
50    MalformedShortKeysetId,
51    /// Slice Error
52    #[error(transparent)]
53    Slice(#[from] TryFromSliceError),
54}
55
56/// Keyset version
57#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
58#[cfg_attr(feature = "swagger", derive(utoipa::ToSchema))]
59pub enum KeySetVersion {
60    /// Version 00
61    Version00,
62    /// Version 01
63    Version01,
64}
65
66impl KeySetVersion {
67    /// [`KeySetVersion`] to byte
68    pub fn to_byte(&self) -> u8 {
69        match self {
70            Self::Version00 => 0,
71            Self::Version01 => 1,
72        }
73    }
74
75    /// [`KeySetVersion`] from byte
76    pub fn from_byte(byte: &u8) -> Result<Self, Error> {
77        match byte {
78            0 => Ok(Self::Version00),
79            1 => Ok(Self::Version01),
80            _ => Err(Error::UnknownVersion),
81        }
82    }
83}
84
85impl fmt::Display for KeySetVersion {
86    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
87        match self {
88            KeySetVersion::Version00 => f.write_str("00"),
89            KeySetVersion::Version01 => f.write_str("01"),
90        }
91    }
92}
93
94/// Keyset ID bytes
95#[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
96#[cfg_attr(feature = "swagger", derive(utoipa::ToSchema))]
97pub enum IdBytes {
98    /// Bytes for v1
99    V1([u8; 7]),
100    /// Bytes for v2
101    V2([u8; 32]),
102}
103
104impl IdBytes {
105    /// Convert [`IdBytes`] to [`Vec<u8>`]
106    pub fn to_vec(&self) -> Vec<u8> {
107        match self {
108            IdBytes::V1(bytes) => bytes.to_vec(),
109            IdBytes::V2(bytes) => bytes.to_vec(),
110        }
111    }
112}
113
114/// A keyset ID is an identifier for a specific keyset. It can be derived by
115/// anyone who knows the set of public keys of a mint. The keyset ID **CAN**
116/// be stored in a Cashu token such that the token can be used to identify
117/// which mint or keyset it was generated from.
118#[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash, Serialize, Deserialize)]
119#[serde(into = "String", try_from = "String")]
120#[cfg_attr(feature = "swagger", derive(utoipa::ToSchema))]
121pub struct Id {
122    version: KeySetVersion,
123    id: IdBytes,
124}
125
126impl Id {
127    const STRLEN_V1: usize = 14;
128    const BYTELEN_V1: usize = 7;
129    const STRLEN_V2: usize = 64;
130    const BYTELEN_V2: usize = 32;
131
132    /// [`Id`] to bytes
133    pub fn to_bytes(&self) -> Vec<u8> {
134        [vec![self.version.to_byte()], self.id.to_vec()].concat()
135    }
136
137    /// [`Id`] from bytes
138    pub fn from_bytes(bytes: &[u8]) -> Result<Self, Error> {
139        let version = KeySetVersion::from_byte(&bytes[0])?;
140        let id = match version {
141            KeySetVersion::Version00 => IdBytes::V1(bytes[1..].try_into()?),
142            KeySetVersion::Version01 => IdBytes::V2(bytes[1..].try_into()?),
143        };
144        Ok(Self { version, id })
145    }
146
147    /// Get the version of the keyset
148    pub fn get_version(&self) -> KeySetVersion {
149        self.version
150    }
151
152    /// *** V2 KEYSET ***
153    /// create [`Id`] v2 from keys, unit and (optionally) expiry
154    /// 1 - sort public keys by their amount in ascending order
155    /// 2 - concatenate all public keys to one byte array
156    /// 3 - concatenate the lowercase unit string to the byte array (e.g. "unit:sat")
157    /// 4 - If a final expiration is specified, convert it into a radix-10 string and concatenate it (e.g "final_expiry:1896187313")
158    /// 5 - HASH_SHA256 the concatenated byte array and take the first 31 bytes
159    /// 6 - prefix it with a keyset ID version byte
160    pub fn v2_from_data(map: &Keys, unit: &CurrencyUnit, expiry: Option<u64>) -> Self {
161        let mut keys: Vec<(&Amount, &super::PublicKey)> = map.iter().collect();
162        keys.sort_by_key(|(amt, _v)| *amt);
163
164        let mut pubkeys_concat: Vec<u8> = keys
165            .iter()
166            .map(|(_, pubkey)| pubkey.to_bytes())
167            .collect::<Vec<[u8; 33]>>()
168            .concat();
169
170        // Add the unit
171        pubkeys_concat.extend(b"unit:");
172        pubkeys_concat.extend(unit.to_string().to_lowercase().as_bytes());
173
174        // Add the expiration
175        if let Some(expiry) = expiry {
176            pubkeys_concat.extend(b"final_expiry:");
177            pubkeys_concat.extend(expiry.to_string().as_bytes());
178        }
179
180        let hash = Sha256::hash(&pubkeys_concat);
181        let hex_of_hash = hex::encode(hash.to_byte_array());
182
183        Self {
184            version: KeySetVersion::Version01,
185            id: IdBytes::V2(
186                hex::decode(&hex_of_hash[0..Self::STRLEN_V2])
187                    .expect("Keys hash could not be hex decoded")
188                    .try_into()
189                    .expect("Invalid length of hex id"),
190            ),
191        }
192    }
193
194    /// *** V1 VERSION ***
195    /// As per NUT-02:
196    ///   1. sort public keys by their amount in ascending order
197    ///   2. concatenate all public keys to one string
198    ///   3. HASH_SHA256 the concatenated public keys
199    ///   4. take the first 14 characters of the hex-encoded hash
200    ///   5. prefix it with a keyset ID version byte
201    pub fn v1_from_keys(map: &Keys) -> Self {
202        let mut keys: Vec<(&Amount, &super::PublicKey)> = map.iter().collect();
203        keys.sort_by_key(|(amt, _v)| *amt);
204
205        let pubkeys_concat: Vec<u8> = keys
206            .iter()
207            .map(|(_, pubkey)| pubkey.to_bytes())
208            .collect::<Vec<[u8; 33]>>()
209            .concat();
210
211        let hash = Sha256::hash(&pubkeys_concat);
212        let hex_of_hash = hex::encode(hash.to_byte_array());
213
214        Self {
215            version: KeySetVersion::Version00,
216            id: IdBytes::V1(
217                hex::decode(&hex_of_hash[0..Self::STRLEN_V1])
218                    .expect("Keys hash could not be hex decoded")
219                    .try_into()
220                    .expect("Invalid length of hex id"),
221            ),
222        }
223    }
224
225    /// Selects the correct IDv2 from a list of keysets and the given short-id
226    /// or returns the short-id in the case of v1.
227    pub fn from_short_keyset_id(
228        short_id: &ShortKeysetId,
229        keysets_info: &[KeySetInfo],
230    ) -> Result<Self, Error> {
231        // Check prefix length
232        if short_id.prefix.len() < Self::BYTELEN_V1 || short_id.prefix.len() > Self::BYTELEN_V2 {
233            return Err(Error::MalformedShortKeysetId);
234        }
235
236        match short_id.version {
237            KeySetVersion::Version00 => {
238                let mut idbytes: [u8; Self::BYTELEN_V1] = [0u8; Self::BYTELEN_V1];
239                idbytes.copy_from_slice(&short_id.prefix[..Self::BYTELEN_V1]);
240                Ok(Self {
241                    version: short_id.version,
242                    id: IdBytes::V1(idbytes),
243                })
244            }
245            KeySetVersion::Version01 => {
246                // We return the first match or error
247                for keyset_info in keysets_info.iter() {
248                    if keyset_info.id.id.to_vec()[..short_id.prefix.len()] == short_id.prefix {
249                        return Ok(keyset_info.id);
250                    }
251                }
252                Err(Error::UnknownShortKeysetId)
253            }
254        }
255    }
256}
257
258// Used to generate a compressed unique identifier as part of the NUT13 spec
259// This is a one-way function
260impl From<Id> for u32 {
261    fn from(value: Id) -> Self {
262        let id_bytes = value.to_bytes();
263        let mut hex_bytes: [u8; 8] = [0; 8];
264        hex_bytes.copy_from_slice(&id_bytes[..8]);
265
266        let int = u64::from_be_bytes(hex_bytes);
267
268        (int % (2_u64.pow(31) - 1)) as u32
269    }
270}
271
272impl fmt::Display for Id {
273    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
274        let hex_id = match self.id {
275            IdBytes::V1(id) => hex::encode(id),
276            IdBytes::V2(id) => hex::encode(id),
277        };
278        f.write_str(&format!("{}{}", self.version, hex_id))
279    }
280}
281
282impl fmt::Debug for Id {
283    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
284        let hex_id = match self.id {
285            IdBytes::V1(id) => hex::encode(id),
286            IdBytes::V2(id) => hex::encode(id),
287        };
288        f.write_str(&format!("{}{}", self.version, hex_id))
289    }
290}
291
292impl TryFrom<String> for Id {
293    type Error = Error;
294
295    fn try_from(s: String) -> Result<Self, Self::Error> {
296        ensure_cdk!(
297            s.len() == Self::STRLEN_V1 + 2 || s.len() == Self::STRLEN_V2 + 2,
298            Error::Length
299        );
300
301        let version: KeySetVersion = KeySetVersion::from_byte(&hex::decode(&s[..2])?[0])?;
302        let id = match version {
303            KeySetVersion::Version00 => IdBytes::V1(
304                hex::decode(&s[2..])?
305                    .try_into()
306                    .map_err(|_| Error::Length)?,
307            ),
308            KeySetVersion::Version01 => IdBytes::V2(
309                hex::decode(&s[2..])?
310                    .try_into()
311                    .map_err(|_| Error::Length)?,
312            ),
313        };
314
315        Ok(Self { version, id })
316    }
317}
318
319impl FromStr for Id {
320    type Err = Error;
321
322    fn from_str(s: &str) -> Result<Self, Self::Err> {
323        Self::try_from(s.to_string())
324    }
325}
326
327impl From<Id> for String {
328    fn from(value: Id) -> Self {
329        value.to_string()
330    }
331}
332
333/// Improper prefix of the keyset ID. In case of v1, this is the whole ID.
334/// In case of v2, this is the 8-byte prefix
335#[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Serialize, Deserialize)]
336#[serde(into = "String", try_from = "String")]
337#[cfg_attr(feature = "swagger", derive(utoipa::ToSchema))]
338pub struct ShortKeysetId {
339    /// The version of the short keyset
340    version: KeySetVersion,
341    /// The improper prefix of the keyset ID bytes
342    prefix: Vec<u8>,
343}
344
345impl ShortKeysetId {
346    /// [`ShortKeysetId`] to bytes
347    pub fn to_bytes(&self) -> Vec<u8> {
348        [vec![self.version.to_byte()], self.prefix.clone()].concat()
349    }
350
351    /// [`ShortKeysetId`] from bytes
352    pub fn from_bytes(bytes: &[u8]) -> Result<Self, Error> {
353        let version = KeySetVersion::from_byte(&bytes[0])?;
354        let prefix = bytes[1..].to_vec();
355        Ok(Self { version, prefix })
356    }
357}
358
359impl From<Id> for ShortKeysetId {
360    fn from(id: Id) -> Self {
361        let version = id.version;
362        let prefix: Vec<u8> = match id.version {
363            KeySetVersion::Version00 => match id.id {
364                IdBytes::V1(idbytes) => Vec::from(&idbytes),
365                _ => panic!("Unexpected IdBytes length"),
366            },
367            KeySetVersion::Version01 => match id.id {
368                IdBytes::V2(idbytes) => Vec::from(&idbytes[..7]),
369                _ => panic!("Unexpected IdBytes length"),
370            },
371        };
372
373        Self { version, prefix }
374    }
375}
376
377impl fmt::Display for ShortKeysetId {
378    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
379        let hex_id = hex::encode(&self.prefix);
380        f.write_str(&format!("{}{}", self.version, hex_id))
381    }
382}
383
384impl fmt::Debug for ShortKeysetId {
385    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
386        let hex_id = hex::encode(&self.prefix);
387        f.write_str(&format!("{}{}", self.version, hex_id))
388    }
389}
390
391impl TryFrom<String> for ShortKeysetId {
392    type Error = Error;
393
394    fn try_from(s: String) -> Result<Self, Self::Error> {
395        ensure_cdk!(s.len() == 16, Error::Length);
396
397        let version: KeySetVersion = KeySetVersion::from_byte(&hex::decode(&s[..2])?[0])?;
398        let prefix = hex::decode(&s[2..])?;
399
400        Ok(Self { version, prefix })
401    }
402}
403
404impl FromStr for ShortKeysetId {
405    type Err = Error;
406
407    fn from_str(s: &str) -> Result<Self, Self::Err> {
408        Self::try_from(s.to_string())
409    }
410}
411
412impl From<ShortKeysetId> for String {
413    fn from(value: ShortKeysetId) -> Self {
414        value.to_string()
415    }
416}
417
418/// Mint Keysets [NUT-02]
419/// Ids of mints keyset ids
420#[serde_as]
421#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
422#[cfg_attr(feature = "swagger", derive(utoipa::ToSchema))]
423pub struct KeysetResponse {
424    /// set of public key ids that the mint generates
425    #[serde_as(as = "VecSkipError<_>")]
426    pub keysets: Vec<KeySetInfo>,
427}
428
429/// Keyset
430#[derive(Debug, Clone, PartialEq, Eq, Deserialize, Serialize)]
431#[cfg_attr(feature = "swagger", derive(utoipa::ToSchema))]
432pub struct KeySet {
433    /// Keyset [`Id`]
434    #[cfg_attr(feature = "swagger", schema(value_type = String))]
435    pub id: Id,
436    /// Keyset [`CurrencyUnit`]
437    pub unit: CurrencyUnit,
438    /// Keyset [`Keys`]
439    pub keys: Keys,
440    /// Expiry
441    #[serde(skip_serializing_if = "Option::is_none")]
442    pub final_expiry: Option<u64>,
443}
444
445impl KeySet {
446    /// Verify the keyset id matches keys
447    pub fn verify_id(&self) -> Result<(), Error> {
448        match self.id.version {
449            KeySetVersion::Version00 => {
450                let keys_id: Id = Id::v1_from_keys(&self.keys);
451
452                ensure_cdk!(keys_id == self.id, Error::IncorrectKeysetId);
453            }
454            KeySetVersion::Version01 => {
455                let keys_id: Id = Id::v2_from_data(&self.keys, &self.unit, self.final_expiry);
456
457                ensure_cdk!(keys_id == self.id, Error::IncorrectKeysetId);
458            }
459        }
460
461        Ok(())
462    }
463}
464
465#[cfg(feature = "mint")]
466impl From<MintKeySet> for KeySet {
467    fn from(keyset: MintKeySet) -> Self {
468        Self {
469            id: keyset.id,
470            unit: keyset.unit,
471            keys: Keys::from(keyset.keys),
472            final_expiry: keyset.final_expiry,
473        }
474    }
475}
476
477/// KeySetInfo
478#[derive(Debug, Clone, Hash, PartialEq, Eq, Deserialize, Serialize)]
479#[cfg_attr(feature = "swagger", derive(utoipa::ToSchema))]
480pub struct KeySetInfo {
481    /// Keyset [`Id`]
482    #[cfg_attr(feature = "swagger", schema(value_type = String))]
483    pub id: Id,
484    /// Keyset [`CurrencyUnit`]
485    pub unit: CurrencyUnit,
486    /// Keyset state
487    /// Mint will only sign from an active keyset
488    pub active: bool,
489    /// Input Fee PPK
490    #[serde(
491        deserialize_with = "deserialize_input_fee_ppk",
492        default = "default_input_fee_ppk"
493    )]
494    pub input_fee_ppk: u64,
495    /// Expiry of the keyset
496    #[serde(skip_serializing_if = "Option::is_none")]
497    pub final_expiry: Option<u64>,
498}
499
500fn deserialize_input_fee_ppk<'de, D>(deserializer: D) -> Result<u64, D::Error>
501where
502    D: Deserializer<'de>,
503{
504    // This will either give us a u64 or null (which becomes None)
505    let opt = Option::<u64>::deserialize(deserializer)?;
506    Ok(opt.unwrap_or_else(default_input_fee_ppk))
507}
508
509fn default_input_fee_ppk() -> u64 {
510    0
511}
512
513#[cfg(feature = "mint")]
514/// MintKeyset
515#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
516pub struct MintKeySet {
517    /// Keyset [`Id`]
518    pub id: Id,
519    /// Keyset [`CurrencyUnit`]
520    pub unit: CurrencyUnit,
521    /// Keyset [`MintKeys`]
522    pub keys: MintKeys,
523    #[serde(skip_serializing_if = "Option::is_none")]
524    /// Expiry [`Option<u64>`]
525    pub final_expiry: Option<u64>,
526}
527
528#[cfg(feature = "mint")]
529impl MintKeySet {
530    /// Generate new [`MintKeySet`]
531    pub fn generate<C: secp256k1::Signing>(
532        secp: &Secp256k1<C>,
533        xpriv: Xpriv,
534        unit: CurrencyUnit,
535        max_order: u8,
536        final_expiry: Option<u64>,
537        version: KeySetVersion,
538    ) -> Self {
539        let mut map = BTreeMap::new();
540        for i in 0..max_order {
541            let amount = Amount::from(2_u64.pow(i as u32));
542            let secret_key = xpriv
543                .derive_priv(
544                    secp,
545                    &[ChildNumber::from_hardened_idx(i as u32).expect("order is valid index")],
546                )
547                .expect("RNG busted")
548                .private_key;
549            let public_key = secret_key.public_key(secp);
550            map.insert(
551                amount,
552                MintKeyPair {
553                    secret_key: secret_key.into(),
554                    public_key: public_key.into(),
555                },
556            );
557        }
558
559        let keys = MintKeys::new(map);
560        let id = match version {
561            KeySetVersion::Version00 => Id::v1_from_keys(&keys.clone().into()),
562            KeySetVersion::Version01 => Id::v2_from_data(&keys.clone().into(), &unit, final_expiry),
563        };
564        Self {
565            id,
566            unit,
567            keys,
568            final_expiry,
569        }
570    }
571
572    /// Generate new [`MintKeySet`] from seed
573    pub fn generate_from_seed<C: secp256k1::Signing>(
574        secp: &Secp256k1<C>,
575        seed: &[u8],
576        max_order: u8,
577        currency_unit: CurrencyUnit,
578        derivation_path: DerivationPath,
579        final_expiry: Option<u64>,
580        version: KeySetVersion,
581    ) -> Self {
582        let xpriv = Xpriv::new_master(bitcoin::Network::Bitcoin, seed).expect("RNG busted");
583        Self::generate(
584            secp,
585            xpriv
586                .derive_priv(secp, &derivation_path)
587                .expect("RNG busted"),
588            currency_unit,
589            max_order,
590            final_expiry,
591            version,
592        )
593    }
594
595    /// Generate new [`MintKeySet`] from xpriv
596    pub fn generate_from_xpriv<C: secp256k1::Signing>(
597        secp: &Secp256k1<C>,
598        xpriv: Xpriv,
599        max_order: u8,
600        currency_unit: CurrencyUnit,
601        derivation_path: DerivationPath,
602        final_expiry: Option<u64>,
603        version: KeySetVersion,
604    ) -> Self {
605        Self::generate(
606            secp,
607            xpriv
608                .derive_priv(secp, &derivation_path)
609                .expect("RNG busted"),
610            currency_unit,
611            max_order,
612            final_expiry,
613            version,
614        )
615    }
616}
617
618#[cfg(feature = "mint")]
619impl From<MintKeySet> for Id {
620    fn from(keyset: MintKeySet) -> Id {
621        let keys: super::KeySet = keyset.into();
622        match keys.id.version {
623            KeySetVersion::Version00 => Id::v1_from_keys(&keys.keys),
624            KeySetVersion::Version01 => Id::v2_from_data(&keys.keys, &keys.unit, keys.final_expiry),
625        }
626    }
627}
628
629#[cfg(feature = "mint")]
630impl From<&MintKeys> for Id {
631    fn from(map: &MintKeys) -> Self {
632        let keys: super::Keys = map.clone().into();
633
634        Id::v1_from_keys(&keys)
635    }
636}
637
638#[cfg(test)]
639mod test {
640    use std::str::FromStr;
641
642    use bitcoin::secp256k1::rand::{self, RngCore};
643
644    use super::{KeySetInfo, KeySetVersion, Keys, KeysetResponse, ShortKeysetId};
645    use crate::nuts::nut02::{Error, Id};
646    use crate::nuts::KeysResponse;
647    use crate::util::hex;
648    use crate::CurrencyUnit;
649
650    const SHORT_KEYSET_ID: &str = "00456a94ab4e1c46";
651    const SHORT_KEYSET: &str = r#"
652        {
653            "1":"03a40f20667ed53513075dc51e715ff2046cad64eb68960632269ba7f0210e38bc",
654            "2":"03fd4ce5a16b65576145949e6f99f445f8249fee17c606b688b504a849cdc452de",
655            "4":"02648eccfa4c026960966276fa5a4cae46ce0fd432211a4f449bf84f13aa5f8303",
656            "8":"02fdfd6796bfeac490cbee12f778f867f0a2c68f6508d17c649759ea0dc3547528"
657        }
658    "#;
659
660    const KEYSET_ID: &str = "000f01df73ea149a";
661    const KEYSET: &str = r#"
662        {
663            "1":"03ba786a2c0745f8c30e490288acd7a72dd53d65afd292ddefa326a4a3fa14c566",
664            "2":"03361cd8bd1329fea797a6add1cf1990ffcf2270ceb9fc81eeee0e8e9c1bd0cdf5",
665            "4":"036e378bcf78738ddf68859293c69778035740e41138ab183c94f8fee7572214c7",
666            "8":"03909d73beaf28edfb283dbeb8da321afd40651e8902fcf5454ecc7d69788626c0",
667            "16":"028a36f0e6638ea7466665fe174d958212723019ec08f9ce6898d897f88e68aa5d",
668            "32":"03a97a40e146adee2687ac60c2ba2586a90f970de92a9d0e6cae5a4b9965f54612",
669            "64":"03ce86f0c197aab181ddba0cfc5c5576e11dfd5164d9f3d4a3fc3ffbbf2e069664",
670            "128":"0284f2c06d938a6f78794814c687560a0aabab19fe5e6f30ede38e113b132a3cb9",
671            "256":"03b99f475b68e5b4c0ba809cdecaae64eade2d9787aa123206f91cd61f76c01459",
672            "512":"03d4db82ea19a44d35274de51f78af0a710925fe7d9e03620b84e3e9976e3ac2eb",
673            "1024":"031fbd4ba801870871d46cf62228a1b748905ebc07d3b210daf48de229e683f2dc",
674            "2048":"0276cedb9a3b160db6a158ad4e468d2437f021293204b3cd4bf6247970d8aff54b",
675            "4096":"02fc6b89b403ee9eb8a7ed457cd3973638080d6e04ca8af7307c965c166b555ea2",
676            "8192":"0320265583e916d3a305f0d2687fcf2cd4e3cd03a16ea8261fda309c3ec5721e21",
677            "16384":"036e41de58fdff3cb1d8d713f48c63bc61fa3b3e1631495a444d178363c0d2ed50",
678            "32768":"0365438f613f19696264300b069d1dad93f0c60a37536b72a8ab7c7366a5ee6c04",
679            "65536":"02408426cfb6fc86341bac79624ba8708a4376b2d92debdf4134813f866eb57a8d",
680            "131072":"031063e9f11c94dc778c473e968966eac0e70b7145213fbaff5f7a007e71c65f41",
681            "262144":"02f2a3e808f9cd168ec71b7f328258d0c1dda250659c1aced14c7f5cf05aab4328",
682            "524288":"038ac10de9f1ff9395903bb73077e94dbf91e9ef98fd77d9a2debc5f74c575bc86",
683            "1048576":"0203eaee4db749b0fc7c49870d082024b2c31d889f9bc3b32473d4f1dfa3625788",
684            "2097152":"033cdb9d36e1e82ae652b7b6a08e0204569ec7ff9ebf85d80a02786dc7fe00b04c",
685            "4194304":"02c8b73f4e3a470ae05e5f2fe39984d41e9f6ae7be9f3b09c9ac31292e403ac512",
686            "8388608":"025bbe0cfce8a1f4fbd7f3a0d4a09cb6badd73ef61829dc827aa8a98c270bc25b0",
687            "16777216":"037eec3d1651a30a90182d9287a5c51386fe35d4a96839cf7969c6e2a03db1fc21",
688            "33554432":"03280576b81a04e6abd7197f305506476f5751356b7643988495ca5c3e14e5c262",
689            "67108864":"03268bfb05be1dbb33ab6e7e00e438373ca2c9b9abc018fdb452d0e1a0935e10d3",
690            "134217728":"02573b68784ceba9617bbcc7c9487836d296aa7c628c3199173a841e7a19798020",
691            "268435456":"0234076b6e70f7fbf755d2227ecc8d8169d662518ee3a1401f729e2a12ccb2b276",
692            "536870912":"03015bd88961e2a466a2163bd4248d1d2b42c7c58a157e594785e7eb34d880efc9",
693            "1073741824":"02c9b076d08f9020ebee49ac8ba2610b404d4e553a4f800150ceb539e9421aaeee",
694            "2147483648":"034d592f4c366afddc919a509600af81b489a03caf4f7517c2b3f4f2b558f9a41a",
695            "4294967296":"037c09ecb66da082981e4cbdb1ac65c0eb631fc75d85bed13efb2c6364148879b5",
696            "8589934592":"02b4ebb0dda3b9ad83b39e2e31024b777cc0ac205a96b9a6cfab3edea2912ed1b3",
697            "17179869184":"026cc4dacdced45e63f6e4f62edbc5779ccd802e7fabb82d5123db879b636176e9",
698            "34359738368":"02b2cee01b7d8e90180254459b8f09bbea9aad34c3a2fd98c85517ecfc9805af75",
699            "68719476736":"037a0c0d564540fc574b8bfa0253cca987b75466e44b295ed59f6f8bd41aace754",
700            "137438953472":"021df6585cae9b9ca431318a713fd73dbb76b3ef5667957e8633bca8aaa7214fb6",
701            "274877906944":"02b8f53dde126f8c85fa5bb6061c0be5aca90984ce9b902966941caf963648d53a",
702            "549755813888":"029cc8af2840d59f1d8761779b2496623c82c64be8e15f9ab577c657c6dd453785",
703            "1099511627776":"03e446fdb84fad492ff3a25fc1046fb9a93a5b262ebcd0151caa442ea28959a38a",
704            "2199023255552":"02d6b25bd4ab599dd0818c55f75702fde603c93f259222001246569018842d3258",
705            "4398046511104":"03397b522bb4e156ec3952d3f048e5a986c20a00718e5e52cd5718466bf494156a",
706            "8796093022208":"02d1fb9e78262b5d7d74028073075b80bb5ab281edcfc3191061962c1346340f1e",
707            "17592186044416":"030d3f2ad7a4ca115712ff7f140434f802b19a4c9b2dd1c76f3e8e80c05c6a9310",
708            "35184372088832":"03e325b691f292e1dfb151c3fb7cad440b225795583c32e24e10635a80e4221c06",
709            "70368744177664":"03bee8f64d88de3dee21d61f89efa32933da51152ddbd67466bef815e9f93f8fd1",
710            "140737488355328":"0327244c9019a4892e1f04ba3bf95fe43b327479e2d57c25979446cc508cd379ed",
711            "281474976710656":"02fb58522cd662f2f8b042f8161caae6e45de98283f74d4e99f19b0ea85e08a56d",
712            "562949953421312":"02adde4b466a9d7e59386b6a701a39717c53f30c4810613c1b55e6b6da43b7bc9a",
713            "1125899906842624":"038eeda11f78ce05c774f30e393cda075192b890d68590813ff46362548528dca9",
714            "2251799813685248":"02ec13e0058b196db80f7079d329333b330dc30c000dbdd7397cbbc5a37a664c4f",
715            "4503599627370496":"02d2d162db63675bd04f7d56df04508840f41e2ad87312a3c93041b494efe80a73",
716            "9007199254740992":"0356969d6aef2bb40121dbd07c68b6102339f4ea8e674a9008bb69506795998f49",
717            "18014398509481984":"02f4e667567ebb9f4e6e180a4113bb071c48855f657766bb5e9c776a880335d1d6",
718            "36028797018963968":"0385b4fe35e41703d7a657d957c67bb536629de57b7e6ee6fe2130728ef0fc90b0",
719            "72057594037927936":"02b2bc1968a6fddbcc78fb9903940524824b5f5bed329c6ad48a19b56068c144fd",
720            "144115188075855872":"02e0dbb24f1d288a693e8a49bc14264d1276be16972131520cf9e055ae92fba19a",
721            "288230376151711744":"03efe75c106f931a525dc2d653ebedddc413a2c7d8cb9da410893ae7d2fa7d19cc",
722            "576460752303423488":"02c7ec2bd9508a7fc03f73c7565dc600b30fd86f3d305f8f139c45c404a52d958a",
723            "1152921504606846976":"035a6679c6b25e68ff4e29d1c7ef87f21e0a8fc574f6a08c1aa45ff352c1d59f06",
724            "2305843009213693952":"033cdc225962c052d485f7cfbf55a5b2367d200fe1fe4373a347deb4cc99e9a099",
725            "4611686018427387904":"024a4b806cf413d14b294719090a9da36ba75209c7657135ad09bc65328fba9e6f",
726            "9223372036854775808":"0377a6fe114e291a8d8e991627c38001c8305b23b9e98b1c7b1893f5cd0dda6cad"
727        }
728    "#;
729
730    #[test]
731    fn test_deserialization_and_id_generation() {
732        let _id = Id::from_str("009a1f293253e41e").unwrap();
733
734        let keys: Keys = serde_json::from_str(SHORT_KEYSET).unwrap();
735
736        let id: Id = Id::v1_from_keys(&keys);
737
738        assert_eq!(id, Id::from_str(SHORT_KEYSET_ID).unwrap());
739
740        let keys: Keys = serde_json::from_str(KEYSET).unwrap();
741
742        let id: Id = Id::v1_from_keys(&keys);
743
744        assert_eq!(id, Id::from_str(KEYSET_ID).unwrap());
745    }
746
747    #[test]
748    fn test_v2_deserialization_and_id_generation() {
749        let unit: CurrencyUnit = CurrencyUnit::from_str("sat").unwrap();
750        let expiry: u64 = 2059210353; // +10 years from now
751
752        let keys: Keys = serde_json::from_str(SHORT_KEYSET).unwrap();
753        let id_from_str =
754            Id::from_str("01adc013fa9d85171586660abab27579888611659d357bc86bc09cb26eee8bc035")
755                .unwrap();
756        let id = Id::v2_from_data(&keys, &unit, Some(expiry));
757        assert_eq!(id, id_from_str);
758
759        let keys: Keys = serde_json::from_str(KEYSET).unwrap();
760        let id_from_str =
761            Id::from_str("0125bc634e270ad7e937af5b957f8396bb627d73f6e1fd2ffe4294c26b57daf9e0")
762                .unwrap();
763        let id = Id::v2_from_data(&keys, &unit, Some(expiry));
764        assert_eq!(id, id_from_str);
765
766        let id = Id::v2_from_data(&keys, &unit, None);
767        let id_from_str =
768            Id::from_str("016d72f27c8d22808ad66d1959b3dab83af17e2510db7ffd57d2365d9eec3ced75")
769                .unwrap();
770        assert_eq!(id, id_from_str);
771    }
772
773    #[test]
774    fn test_deserialization_keyset_info() {
775        let h = r#"{"id":"009a1f293253e41e","unit":"sat","active":true}"#;
776
777        let _keyset_response: KeySetInfo = serde_json::from_str(h).unwrap();
778
779        let h = r#"{"id":"009a1f293253e41e","unit":"sat","active":true, "input_fee_ppk":null}"#;
780
781        let _keyset_response: KeySetInfo = serde_json::from_str(h).unwrap();
782    }
783
784    #[test]
785    fn test_deserialization_of_keyset_response() {
786        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}]}"#;
787
788        let _keyset_response: KeysetResponse = serde_json::from_str(h).unwrap();
789    }
790
791    #[test]
792    fn test_to_int() {
793        let id = Id::from_str("009a1f293253e41e").unwrap();
794
795        let id_int = u32::from(id);
796        assert_eq!(864559728, id_int)
797    }
798
799    #[test]
800    fn test_v2_to_int() {
801        let id = Id::from_str("01adc013fa9d85171586660abab27579888611659d357bc86bc09cb26eee8bc035")
802            .unwrap();
803
804        let id_int = u32::from(id);
805        assert_eq!(2113471806, id_int);
806    }
807
808    #[test]
809    fn test_id_from_invalid_byte_length() {
810        let three_bytes = [0x01, 0x02, 0x03];
811        let result = Id::from_bytes(&three_bytes);
812        assert!(result.is_err(), "Expected an invalid byte length error");
813    }
814
815    #[test]
816    fn test_keyset_bytes() {
817        let id = Id::from_str("009a1f293253e41e").unwrap();
818
819        let id_bytes = id.to_bytes();
820
821        assert_eq!(id_bytes.len(), 8);
822
823        let id_from_bytes = Id::from_bytes(&id_bytes).unwrap();
824
825        assert_eq!(id_from_bytes, id);
826    }
827
828    #[test]
829    fn test_deserialization_keys_response() {
830        let keys = 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831
832        let keys_response: KeysResponse = serde_json::from_str(keys).unwrap();
833
834        assert_eq!(keys_response.keysets.len(), 2);
835    }
836
837    fn generate_random_id(version: KeySetVersion) -> Id {
838        match version {
839            KeySetVersion::Version00 => {
840                let mut rand_bytes = vec![0u8; 8];
841                rand::thread_rng().fill_bytes(&mut rand_bytes[1..]);
842                Id::from_bytes(&rand_bytes).unwrap_or_else(|e| {
843                    panic!("Failed to create Id from {}: {e}", hex::encode(rand_bytes))
844                })
845            }
846            KeySetVersion::Version01 => {
847                let mut rand_bytes = vec![1u8; 33];
848                rand::thread_rng().fill_bytes(&mut rand_bytes[1..]);
849                Id::from_bytes(&rand_bytes).unwrap_or_else(|e| {
850                    panic!("Failed to create Id from {}: {e}", hex::encode(rand_bytes))
851                })
852            }
853        }
854    }
855
856    #[test]
857    fn test_id_serialization() {
858        let id = generate_random_id(KeySetVersion::Version00);
859        let id_str = id.to_string();
860
861        assert!(id_str.chars().all(|c| c.is_ascii_hexdigit()));
862        assert_eq!(16, id_str.len());
863        assert_eq!(id_str.to_lowercase(), id_str);
864    }
865
866    #[test]
867    fn test_id_v2_serialization() {
868        let id = generate_random_id(KeySetVersion::Version01);
869        let id_str = id.to_string();
870
871        assert!(id_str.chars().all(|c| c.is_ascii_hexdigit()));
872        assert_eq!(66, id_str.len());
873        assert_eq!(id_str.to_lowercase(), id_str);
874    }
875
876    #[test]
877    fn test_id_deserialization() {
878        let id_from_short_str = Id::from_str("00123");
879        assert!(matches!(id_from_short_str, Err(Error::Length)));
880
881        let id_from_non_hex_str = Id::from_str(&SHORT_KEYSET_ID.replace('a', "x"));
882        assert!(matches!(id_from_non_hex_str, Err(Error::HexError(_))));
883
884        let id_invalid_version = Id::from_str(&SHORT_KEYSET_ID.replace("00", "99"));
885        assert!(matches!(id_invalid_version, Err(Error::UnknownVersion)));
886
887        let id_from_uppercase = Id::from_str(&SHORT_KEYSET_ID.to_uppercase());
888        assert!(id_from_uppercase.is_ok());
889    }
890
891    #[test]
892    fn test_short_keyset_id_from_id() {
893        let idv1 = Id::from_str("009a1f293253e41e").unwrap();
894        let idv2 =
895            Id::from_str("01adc013fa9d85171586660abab27579888611659d357bc86bc09cb26eee8bc035")
896                .unwrap();
897
898        let short_id_1: ShortKeysetId = idv1.into();
899        let short_id_2: ShortKeysetId = idv2.into();
900
901        assert!(short_id_1.to_string() == "009a1f293253e41e");
902        assert!(short_id_2.to_string() == "01adc013fa9d8517");
903    }
904}
cashu/nuts/nut02.rs

cashu/nuts/
nut02.rs
