//! NUT-02: Keysets and keyset ID
//!
//! <https://github.com/cashubtc/nuts/blob/main/02.md>
use core::fmt;
use core::str::FromStr;
use std::array::TryFromSliceError;
#[cfg(feature = "mint")]
use std::collections::BTreeMap;
#[cfg(feature = "mint")]
use bitcoin::bip32::{ChildNumber, DerivationPath, Xpriv};
use bitcoin::hashes::sha256::Hash as Sha256;
use bitcoin::hashes::Hash;
#[cfg(feature = "mint")]
use bitcoin::key::Secp256k1;
#[cfg(feature = "mint")]
use bitcoin::secp256k1;
use serde::{Deserialize, Deserializer, Serialize};
use serde_with::{serde_as, VecSkipError};
use thiserror::Error;
use super::nut01::Keys;
#[cfg(feature = "mint")]
use super::nut01::{MintKeyPair, MintKeys};
use crate::nuts::nut00::CurrencyUnit;
use crate::util::hex;
use crate::{ensure_cdk, Amount};
/// NUT02 Error
#[derive(Debug, Error)]
pub enum Error {
/// Hex Error
#[error(transparent)]
HexError(#[from] hex::Error),
/// Keyset length error
#[error("NUT02: ID length invalid, expected 8 bytes (short/v1) or 33 bytes (v2)")]
Length,
/// Unknown version
#[error("NUT02: Unknown Version")]
UnknownVersion,
/// Keyset id does not match
#[error("Keyset id incorrect")]
IncorrectKeysetId,
/// Short keyset id does not match any of the provided IDv2s
#[error("Short keyset id does not match any of the provided IDv2s")]
UnknownShortKeysetId,
/// Short keyset id is ill-formed
#[error("Short keyset id is ill-formed")]
MalformedShortKeysetId,
/// Slice Error
#[error(transparent)]
Slice(#[from] TryFromSliceError),
}
/// Keyset version
#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
#[cfg_attr(feature = "swagger", derive(utoipa::ToSchema))]
pub enum KeySetVersion {
/// Version 00
Version00,
/// Version 01
Version01,
}
impl KeySetVersion {
/// [`KeySetVersion`] to byte
pub fn to_byte(&self) -> u8 {
match self {
Self::Version00 => 0,
Self::Version01 => 1,
}
}
/// [`KeySetVersion`] from byte
pub fn from_byte(byte: &u8) -> Result<Self, Error> {
match byte {
0 => Ok(Self::Version00),
1 => Ok(Self::Version01),
_ => Err(Error::UnknownVersion),
}
}
/// [`KeySetVersion`] from proto value
pub fn from_proto_i32(value: i32) -> Result<Self, Error> {
match value {
1 => Ok(Self::Version00),
2 => Ok(Self::Version01),
_ => Err(Error::UnknownVersion),
}
}
/// [`KeySetVersion`] to proto value
pub fn to_proto_i32(&self) -> i32 {
match self {
Self::Version00 => 1,
Self::Version01 => 2,
}
}
}
impl fmt::Display for KeySetVersion {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match self {
KeySetVersion::Version00 => f.write_str("00"),
KeySetVersion::Version01 => f.write_str("01"),
}
}
}
/// Keyset ID bytes
#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
#[cfg_attr(feature = "swagger", derive(utoipa::ToSchema))]
pub enum IdBytes {
/// Bytes for v1
V1([u8; 7]),
/// Bytes for v2
V2([u8; 32]),
}
impl IdBytes {
/// Convert [`IdBytes`] to [`Vec<u8>`]
pub fn to_vec(&self) -> Vec<u8> {
match self {
IdBytes::V1(bytes) => bytes.to_vec(),
IdBytes::V2(bytes) => bytes.to_vec(),
}
}
}
/// A keyset ID is an identifier for a specific keyset. It can be derived by
/// anyone who knows the set of public keys of a mint. The keyset ID **CAN**
/// be stored in a Cashu token such that the token can be used to identify
/// which mint or keyset it was generated from.
#[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash, Serialize, Deserialize)]
#[serde(into = "String", try_from = "String")]
#[cfg_attr(feature = "swagger", derive(utoipa::ToSchema))]
pub struct Id {
version: KeySetVersion,
id: IdBytes,
}
impl Id {
const STRLEN_V1: usize = 14;
const BYTELEN_V1: usize = 7;
const STRLEN_V2: usize = 64;
const BYTELEN_V2: usize = 32;
/// [`Id`] to bytes
pub fn to_bytes(&self) -> Vec<u8> {
[vec![self.version.to_byte()], self.id.to_vec()].concat()
}
/// [`Id`] from bytes
pub fn from_bytes(bytes: &[u8]) -> Result<Self, Error> {
let version = KeySetVersion::from_byte(&bytes[0])?;
let id = match version {
KeySetVersion::Version00 => IdBytes::V1(bytes[1..].try_into()?),
KeySetVersion::Version01 => IdBytes::V2(bytes[1..].try_into()?),
};
Ok(Self { version, id })
}
/// Get the version of the keyset
pub fn get_version(&self) -> KeySetVersion {
self.version
}
/// *** V2 KEYSET ***
/// create [`Id`] v2 from keys, unit and (optionally) expiry
/// 1 - sort public keys by their amount in ascending order
/// 2 - concatenate all public keys to one byte array
/// 3 - concatenate the lowercase unit string to the byte array (e.g. "unit:sat")
/// 4 - If a final expiration is specified, convert it into a radix-10 string and concatenate it (e.g "final_expiry:1896187313")
/// 5 - HASH_SHA256 the concatenated byte array and take the first 31 bytes
/// 6 - prefix it with a keyset ID version byte
///
/// # Panics
///
/// This function will not panic under normal circumstances as the hash output
/// is always valid hex and the correct length.
pub fn v2_from_data(
map: &Keys,
unit: &CurrencyUnit,
input_fee_ppk: u64,
expiry: Option<u64>,
) -> Self {
let mut keys: Vec<(&Amount, &super::PublicKey)> = map.iter().collect();
keys.sort_by_key(|(amt, _v)| *amt);
let keys_string = keys
.iter()
.map(|(amt, pubkey)| format!("{}:{}", amt, hex::encode(pubkey.to_bytes())))
.collect::<Vec<String>>()
.join(",");
let mut data = keys_string;
data.push_str(&format!("|unit:{}", unit));
if input_fee_ppk > 0 {
data.push_str(&format!("|input_fee_ppk:{}", input_fee_ppk));
}
if let Some(expiry) = expiry {
if expiry > 0 {
data.push_str(&format!("|final_expiry:{}", expiry));
}
}
let hash = Sha256::hash(data.as_bytes());
let hex_of_hash = hex::encode(hash.to_byte_array());
Self {
version: KeySetVersion::Version01,
id: IdBytes::V2(
hex::decode(&hex_of_hash[0..Self::STRLEN_V2])
.expect("Keys hash could not be hex decoded")
.try_into()
.expect("Invalid length of hex id"),
),
}
}
/// *** V1 VERSION ***
/// As per NUT-02:
/// 1. sort public keys by their amount in ascending order
/// 2. concatenate all public keys to one string
/// 3. HASH_SHA256 the concatenated public keys
/// 4. take the first 14 characters of the hex-encoded hash
/// 5. prefix it with a keyset ID version byte
///
/// # Panics
///
/// This function will not panic under normal circumstances as the hash output
/// is always valid hex and the correct length.
pub fn v1_from_keys(map: &Keys) -> Self {
let mut keys: Vec<(&Amount, &super::PublicKey)> = map.iter().collect();
keys.sort_by_key(|(amt, _v)| *amt);
let pubkeys_concat: Vec<u8> = keys
.iter()
.map(|(_, pubkey)| pubkey.to_bytes())
.collect::<Vec<[u8; 33]>>()
.concat();
let hash = Sha256::hash(&pubkeys_concat);
let hex_of_hash = hex::encode(hash.to_byte_array());
Self {
version: KeySetVersion::Version00,
id: IdBytes::V1(
hex::decode(&hex_of_hash[0..Self::STRLEN_V1])
.expect("Keys hash could not be hex decoded")
.try_into()
.expect("Invalid length of hex id"),
),
}
}
/// Selects the correct IDv2 from a list of keysets and the given short-id
/// or returns the short-id in the case of v1.
pub fn from_short_keyset_id(
short_id: &ShortKeysetId,
keysets_info: &[KeySetInfo],
) -> Result<Self, Error> {
// Check prefix length
if short_id.prefix.len() < Self::BYTELEN_V1 || short_id.prefix.len() > Self::BYTELEN_V2 {
return Err(Error::MalformedShortKeysetId);
}
match short_id.version {
KeySetVersion::Version00 => {
let mut idbytes: [u8; Self::BYTELEN_V1] = [0u8; Self::BYTELEN_V1];
idbytes.copy_from_slice(&short_id.prefix[..Self::BYTELEN_V1]);
Ok(Self {
version: short_id.version,
id: IdBytes::V1(idbytes),
})
}
KeySetVersion::Version01 => {
// We return the first match or error
for keyset_info in keysets_info.iter() {
if keyset_info.id.id.to_vec()[..short_id.prefix.len()] == short_id.prefix {
return Ok(keyset_info.id);
}
}
Err(Error::UnknownShortKeysetId)
}
}
}
}
// Used to generate a compressed unique identifier as part of the NUT13 spec
// This is a one-way function
impl From<Id> for u32 {
fn from(value: Id) -> Self {
let id_bytes = value.to_bytes();
let mut hex_bytes: [u8; 8] = [0; 8];
hex_bytes.copy_from_slice(&id_bytes[..8]);
let int = u64::from_be_bytes(hex_bytes);
(int % (2_u64.pow(31) - 1)) as u32
}
}
impl fmt::Display for Id {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
let hex_id = match self.id {
IdBytes::V1(id) => hex::encode(id),
IdBytes::V2(id) => hex::encode(id),
};
f.write_str(&format!("{}{}", self.version, hex_id))
}
}
impl fmt::Debug for Id {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
let hex_id = match self.id {
IdBytes::V1(id) => hex::encode(id),
IdBytes::V2(id) => hex::encode(id),
};
f.write_str(&format!("{}{}", self.version, hex_id))
}
}
impl TryFrom<String> for Id {
type Error = Error;
fn try_from(s: String) -> Result<Self, Self::Error> {
// Check that string is ASCII (required for hex) to avoid panics on byte slicing
// with multi-byte UTF-8 characters
ensure_cdk!(
s.is_ascii(),
Error::HexError(hex::Error::InvalidHexCharacter {
c: s.chars().find(|c| !c.is_ascii()).unwrap_or('\0'),
index: s.chars().position(|c| !c.is_ascii()).unwrap_or(0),
})
);
ensure_cdk!(
s.len() == Self::STRLEN_V1 + 2 || s.len() == Self::STRLEN_V2 + 2,
Error::Length
);
let version: KeySetVersion = KeySetVersion::from_byte(&hex::decode(&s[..2])?[0])?;
let id = match version {
KeySetVersion::Version00 => IdBytes::V1(
hex::decode(&s[2..])?
.try_into()
.map_err(|_| Error::Length)?,
),
KeySetVersion::Version01 => IdBytes::V2(
hex::decode(&s[2..])?
.try_into()
.map_err(|_| Error::Length)?,
),
};
Ok(Self { version, id })
}
}
impl FromStr for Id {
type Err = Error;
fn from_str(s: &str) -> Result<Self, Self::Err> {
Self::try_from(s.to_string())
}
}
impl From<Id> for String {
fn from(value: Id) -> Self {
value.to_string()
}
}
/// Improper prefix of the keyset ID. In case of v1, this is the whole ID.
/// In case of v2, this is the 8-byte prefix
#[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Serialize, Deserialize)]
#[serde(into = "String", try_from = "String")]
#[cfg_attr(feature = "swagger", derive(utoipa::ToSchema))]
pub struct ShortKeysetId {
/// The version of the short keyset
version: KeySetVersion,
/// The improper prefix of the keyset ID bytes
prefix: Vec<u8>,
}
impl ShortKeysetId {
/// [`ShortKeysetId`] to bytes
pub fn to_bytes(&self) -> Vec<u8> {
[vec![self.version.to_byte()], self.prefix.clone()].concat()
}
/// [`ShortKeysetId`] from bytes
pub fn from_bytes(bytes: &[u8]) -> Result<Self, Error> {
if bytes.is_empty() {
return Err(Error::Length);
}
let version = KeySetVersion::from_byte(&bytes[0])?;
let prefix = bytes[1..].to_vec();
Ok(Self { version, prefix })
}
}
impl From<Id> for ShortKeysetId {
fn from(id: Id) -> Self {
let version = id.version;
let prefix: Vec<u8> = match id.version {
KeySetVersion::Version00 => match id.id {
IdBytes::V1(idbytes) => Vec::from(&idbytes),
_ => panic!("Unexpected IdBytes length"),
},
KeySetVersion::Version01 => match id.id {
IdBytes::V2(idbytes) => Vec::from(&idbytes[..7]),
_ => panic!("Unexpected IdBytes length"),
},
};
Self { version, prefix }
}
}
impl fmt::Display for ShortKeysetId {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
let hex_id = hex::encode(&self.prefix);
f.write_str(&format!("{}{}", self.version, hex_id))
}
}
impl fmt::Debug for ShortKeysetId {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
let hex_id = hex::encode(&self.prefix);
f.write_str(&format!("{}{}", self.version, hex_id))
}
}
impl TryFrom<String> for ShortKeysetId {
type Error = Error;
fn try_from(s: String) -> Result<Self, Self::Error> {
// Check that string is ASCII (required for hex) to avoid panics on byte slicing
// with multi-byte UTF-8 characters
ensure_cdk!(
s.is_ascii(),
Error::HexError(hex::Error::InvalidHexCharacter {
c: s.chars().find(|c| !c.is_ascii()).unwrap_or('\0'),
index: s.chars().position(|c| !c.is_ascii()).unwrap_or(0),
})
);
ensure_cdk!(s.len() == 16, Error::Length);
let version: KeySetVersion = KeySetVersion::from_byte(&hex::decode(&s[..2])?[0])?;
let prefix = hex::decode(&s[2..])?;
Ok(Self { version, prefix })
}
}
impl FromStr for ShortKeysetId {
type Err = Error;
fn from_str(s: &str) -> Result<Self, Self::Err> {
Self::try_from(s.to_string())
}
}
impl From<ShortKeysetId> for String {
fn from(value: ShortKeysetId) -> Self {
value.to_string()
}
}
/// Mint Keysets [NUT-02]
/// Ids of mints keyset ids
#[serde_as]
#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
#[cfg_attr(feature = "swagger", derive(utoipa::ToSchema))]
pub struct KeysetResponse {
/// set of public key ids that the mint generates
#[serde_as(as = "VecSkipError<_>")]
pub keysets: Vec<KeySetInfo>,
}
/// Keyset
#[derive(Debug, Clone, PartialEq, Eq, Deserialize, Serialize)]
#[cfg_attr(feature = "swagger", derive(utoipa::ToSchema))]
pub struct KeySet {
/// Keyset [`Id`]
#[cfg_attr(feature = "swagger", schema(value_type = String))]
pub id: Id,
/// Keyset [`CurrencyUnit`]
pub unit: CurrencyUnit,
/// Keyset state - indicates whether the mint will sign new outputs with this keyset
#[serde(skip_serializing_if = "Option::is_none")]
pub active: Option<bool>,
/// Keyset [`Keys`]
pub keys: Keys,
/// Input Fee PPK
#[serde(default)]
pub input_fee_ppk: u64,
/// Expiry
#[serde(skip_serializing_if = "Option::is_none")]
pub final_expiry: Option<u64>,
}
impl KeySet {
/// Verify the keyset id matches keys
pub fn verify_id(&self) -> Result<(), Error> {
let keys_id = match self.id.version {
KeySetVersion::Version00 => Id::v1_from_keys(&self.keys),
KeySetVersion::Version01 => Id::v2_from_data(
&self.keys,
&self.unit,
self.input_fee_ppk,
self.final_expiry,
),
};
ensure_cdk!(
u32::from(keys_id) == u32::from(self.id),
Error::IncorrectKeysetId
);
ensure_cdk!(keys_id == self.id, Error::IncorrectKeysetId);
Ok(())
}
}
/// KeySetInfo
#[derive(Debug, Clone, Hash, PartialEq, Eq, Deserialize, Serialize)]
#[cfg_attr(feature = "swagger", derive(utoipa::ToSchema))]
pub struct KeySetInfo {
/// Keyset [`Id`]
#[cfg_attr(feature = "swagger", schema(value_type = String))]
pub id: Id,
/// Keyset [`CurrencyUnit`]
pub unit: CurrencyUnit,
/// Keyset state
/// Mint will only sign from an active keyset
pub active: bool,
/// Input Fee PPK
#[serde(
deserialize_with = "deserialize_input_fee_ppk",
default = "default_input_fee_ppk"
)]
pub input_fee_ppk: u64,
/// Expiry of the keyset
#[serde(skip_serializing_if = "Option::is_none")]
pub final_expiry: Option<u64>,
}
/// List of [KeySetInfo]
pub type KeySetInfos = Vec<KeySetInfo>;
/// Utility methods for [KeySetInfos]
pub trait KeySetInfosMethods {
/// Filter for active keysets
fn active(&self) -> impl Iterator<Item = &KeySetInfo> + '_;
/// Filter keysets for specific unit
fn unit(&self, unit: CurrencyUnit) -> impl Iterator<Item = &KeySetInfo> + '_;
}
impl KeySetInfosMethods for KeySetInfos {
fn active(&self) -> impl Iterator<Item = &KeySetInfo> + '_ {
self.iter().filter(|k| k.active)
}
fn unit(&self, unit: CurrencyUnit) -> impl Iterator<Item = &KeySetInfo> + '_ {
self.iter().filter(move |k| k.unit == unit)
}
}
fn deserialize_input_fee_ppk<'de, D>(deserializer: D) -> Result<u64, D::Error>
where
D: Deserializer<'de>,
{
// This will either give us a u64 or null (which becomes None)
let opt = Option::<u64>::deserialize(deserializer)?;
Ok(opt.unwrap_or_else(default_input_fee_ppk))
}
fn default_input_fee_ppk() -> u64 {
0
}
#[cfg(feature = "mint")]
/// MintKeyset
#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
pub struct MintKeySet {
/// Keyset [`Id`]
pub id: Id,
/// Keyset [`CurrencyUnit`]
pub unit: CurrencyUnit,
/// Keyset [`MintKeys`]
pub keys: MintKeys,
/// Input Fee PPK
#[serde(default)]
pub input_fee_ppk: u64,
#[serde(skip_serializing_if = "Option::is_none")]
/// Expiry [`Option<u64>`]
pub final_expiry: Option<u64>,
}
#[cfg(feature = "mint")]
impl MintKeySet {
/// Generate new [`MintKeySet`]
///
/// # Panics
///
/// This function will panic if the RNG fails or if key derivation fails,
/// which should not happen under normal circumstances.
pub fn generate<C: secp256k1::Signing>(
secp: &Secp256k1<C>,
xpriv: Xpriv,
unit: CurrencyUnit,
amounts: &[u64],
input_fee_ppk: u64,
final_expiry: Option<u64>,
version: KeySetVersion,
) -> Self {
let mut map = BTreeMap::new();
for (i, amount) in amounts.iter().enumerate() {
let secret_key = xpriv
.derive_priv(
secp,
&[ChildNumber::from_hardened_idx(i as u32).expect("order is valid index")],
)
.expect("RNG busted")
.private_key;
let public_key = secret_key.public_key(secp);
map.insert(
amount.into(),
MintKeyPair {
secret_key: secret_key.into(),
public_key: public_key.into(),
},
);
}
let keys = MintKeys::new(map);
let id = match version {
KeySetVersion::Version00 => Id::v1_from_keys(&keys.clone().into()),
KeySetVersion::Version01 => {
Id::v2_from_data(&keys.clone().into(), &unit, input_fee_ppk, final_expiry)
}
};
Self {
id,
unit,
keys,
input_fee_ppk,
final_expiry,
}
}
/// Generate new [`MintKeySet`] from seed
///
/// # Panics
///
/// This function will panic if the RNG fails or if key derivation fails,
/// which should not happen under normal circumstances.
#[allow(clippy::too_many_arguments)]
pub fn generate_from_seed<C: secp256k1::Signing>(
secp: &Secp256k1<C>,
seed: &[u8],
amounts: &[u64],
currency_unit: CurrencyUnit,
derivation_path: DerivationPath,
input_fee_ppk: u64,
final_expiry: Option<u64>,
version: KeySetVersion,
) -> Self {
let xpriv = Xpriv::new_master(bitcoin::Network::Bitcoin, seed).expect("RNG busted");
Self::generate(
secp,
xpriv
.derive_priv(secp, &derivation_path)
.expect("RNG busted"),
currency_unit,
amounts,
input_fee_ppk,
final_expiry,
version,
)
}
/// Generate new [`MintKeySet`] from xpriv
///
/// # Panics
///
/// This function will panic if the RNG fails or if key derivation fails,
/// which should not happen under normal circumstances.
#[allow(clippy::too_many_arguments)]
pub fn generate_from_xpriv<C: secp256k1::Signing>(
secp: &Secp256k1<C>,
xpriv: Xpriv,
amounts: &[u64],
currency_unit: CurrencyUnit,
derivation_path: DerivationPath,
input_fee_ppk: u64,
final_expiry: Option<u64>,
version: KeySetVersion,
) -> Self {
Self::generate(
secp,
xpriv
.derive_priv(secp, &derivation_path)
.expect("RNG busted"),
currency_unit,
amounts,
input_fee_ppk,
final_expiry,
version,
)
}
}
#[cfg(feature = "mint")]
impl From<MintKeySet> for Id {
fn from(keyset: MintKeySet) -> Id {
let keys: Keys = keyset.keys.into();
match keyset.id.version {
KeySetVersion::Version00 => Id::v1_from_keys(&keys),
KeySetVersion::Version01 => Id::v2_from_data(
&keys,
&keyset.unit,
keyset.input_fee_ppk,
keyset.final_expiry,
),
}
}
}
#[cfg(feature = "mint")]
impl From<&MintKeys> for Id {
fn from(map: &MintKeys) -> Self {
let keys: super::Keys = map.clone().into();
Id::v1_from_keys(&keys)
}
}
#[cfg(test)]
mod test {
use std::str::FromStr;
use bitcoin::secp256k1::rand::{self, RngCore};
use super::{KeySetInfo, KeySetVersion, Keys, KeysetResponse, ShortKeysetId};
use crate::nuts::nut02::{Error, Id};
use crate::nuts::KeysResponse;
use crate::util::hex;
use crate::CurrencyUnit;
const SHORT_KEYSET_ID: &str = "00456a94ab4e1c46";
const SHORT_KEYSET: &str = r#"
{
"1":"03a40f20667ed53513075dc51e715ff2046cad64eb68960632269ba7f0210e38bc",
"2":"03fd4ce5a16b65576145949e6f99f445f8249fee17c606b688b504a849cdc452de",
"4":"02648eccfa4c026960966276fa5a4cae46ce0fd432211a4f449bf84f13aa5f8303",
"8":"02fdfd6796bfeac490cbee12f778f867f0a2c68f6508d17c649759ea0dc3547528"
}
"#;
const KEYSET_ID: &str = "000f01df73ea149a";
const KEYSET: &str = r#"
{
"1":"03ba786a2c0745f8c30e490288acd7a72dd53d65afd292ddefa326a4a3fa14c566",
"2":"03361cd8bd1329fea797a6add1cf1990ffcf2270ceb9fc81eeee0e8e9c1bd0cdf5",
"4":"036e378bcf78738ddf68859293c69778035740e41138ab183c94f8fee7572214c7",
"8":"03909d73beaf28edfb283dbeb8da321afd40651e8902fcf5454ecc7d69788626c0",
"16":"028a36f0e6638ea7466665fe174d958212723019ec08f9ce6898d897f88e68aa5d",
"32":"03a97a40e146adee2687ac60c2ba2586a90f970de92a9d0e6cae5a4b9965f54612",
"64":"03ce86f0c197aab181ddba0cfc5c5576e11dfd5164d9f3d4a3fc3ffbbf2e069664",
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"9223372036854775808":"0377a6fe114e291a8d8e991627c38001c8305b23b9e98b1c7b1893f5cd0dda6cad"
}
"#;
#[test]
fn test_deserialization_and_id_generation() {
let _id = Id::from_str("009a1f293253e41e").unwrap();
let keys: Keys = serde_json::from_str(SHORT_KEYSET).unwrap();
let id: Id = Id::v1_from_keys(&keys);
assert_eq!(id, Id::from_str(SHORT_KEYSET_ID).unwrap());
let keys: Keys = serde_json::from_str(KEYSET).unwrap();
let id: Id = Id::v1_from_keys(&keys);
assert_eq!(id, Id::from_str(KEYSET_ID).unwrap());
}
#[test]
fn test_v2_deserialization_and_id_generation() {
let unit: CurrencyUnit = CurrencyUnit::from_str("sat").unwrap();
let expiry: u64 = 2059210353; // +10 years from now
let input_fee_ppk = 100;
let keys: Keys = serde_json::from_str(SHORT_KEYSET).unwrap();
let id_from_str =
Id::from_str("015ba18a8adcd02e715a58358eb618da4a4b3791151a4bee5e968bb88406ccf76a")
.unwrap();
let id = Id::v2_from_data(&keys, &unit, input_fee_ppk, Some(expiry));
assert_eq!(id, id_from_str);
let keys: Keys = serde_json::from_str(KEYSET).unwrap();
let id_from_str =
Id::from_str("01ab6aa4ff30390da34986d84be5274b48ad7a74265d791095bfc39f4098d9764f")
.unwrap();
let id = Id::v2_from_data(&keys, &unit, 0, Some(expiry));
assert_eq!(id, id_from_str);
let id = Id::v2_from_data(&keys, &unit, 0, None);
let id_from_str =
Id::from_str("012fbb01a4e200c76df911eeba3b8fe1831202914b24664f4bccbd25852a6708f8")
.unwrap();
assert_eq!(id, id_from_str);
}
#[test]
fn test_deserialization_keyset_info() {
let h = r#"{"id":"009a1f293253e41e","unit":"sat","active":true}"#;
let _keyset_response: KeySetInfo = serde_json::from_str(h).unwrap();
let h = r#"{"id":"009a1f293253e41e","unit":"sat","active":true, "input_fee_ppk":null}"#;
let _keyset_response: KeySetInfo = serde_json::from_str(h).unwrap();
}
#[test]
fn test_deserialization_of_keyset_response() {
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}]}"#;
let _keyset_response: KeysetResponse = serde_json::from_str(h).unwrap();
}
#[test]
fn test_to_int() {
let id = Id::from_str("009a1f293253e41e").unwrap();
let id_int = u32::from(id);
assert_eq!(864559728, id_int)
}
#[test]
fn test_v2_to_int() {
let id = Id::from_str("01adc013fa9d85171586660abab27579888611659d357bc86bc09cb26eee8bc035")
.unwrap();
let id_int = u32::from(id);
assert_eq!(2113471806, id_int);
}
#[test]
fn test_id_from_invalid_byte_length() {
let three_bytes = [0x01, 0x02, 0x03];
let result = Id::from_bytes(&three_bytes);
assert!(result.is_err(), "Expected an invalid byte length error");
}
#[test]
fn test_keyset_bytes() {
let id = Id::from_str("009a1f293253e41e").unwrap();
let id_bytes = id.to_bytes();
assert_eq!(id_bytes.len(), 8);
let id_from_bytes = Id::from_bytes(&id_bytes).unwrap();
assert_eq!(id_from_bytes, id);
}
#[test]
fn test_keyset_version_proto_mapping() {
assert_eq!(
KeySetVersion::from_proto_i32(1).unwrap(),
KeySetVersion::Version00
);
assert_eq!(
KeySetVersion::from_proto_i32(2).unwrap(),
KeySetVersion::Version01
);
assert!(matches!(
KeySetVersion::from_proto_i32(0),
Err(Error::UnknownVersion)
));
assert_eq!(KeySetVersion::Version00.to_proto_i32(), 1);
assert_eq!(KeySetVersion::Version01.to_proto_i32(), 2);
}
#[test]
fn test_deserialization_keys_response() {
let keys = 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let keys_response: KeysResponse = serde_json::from_str(keys).unwrap();
assert_eq!(keys_response.keysets.len(), 2);
}
fn generate_random_id(version: KeySetVersion) -> Id {
match version {
KeySetVersion::Version00 => {
let mut rand_bytes = vec![0u8; 8];
rand::thread_rng().fill_bytes(&mut rand_bytes[1..]);
Id::from_bytes(&rand_bytes).unwrap_or_else(|e| {
panic!("Failed to create Id from {}: {e}", hex::encode(rand_bytes))
})
}
KeySetVersion::Version01 => {
let mut rand_bytes = vec![1u8; 33];
rand::thread_rng().fill_bytes(&mut rand_bytes[1..]);
Id::from_bytes(&rand_bytes).unwrap_or_else(|e| {
panic!("Failed to create Id from {}: {e}", hex::encode(rand_bytes))
})
}
}
}
#[test]
fn test_id_serialization() {
let id = generate_random_id(KeySetVersion::Version00);
let id_str = id.to_string();
assert!(id_str.chars().all(|c| c.is_ascii_hexdigit()));
assert_eq!(16, id_str.len());
assert_eq!(id_str.to_lowercase(), id_str);
}
#[test]
fn test_id_v2_serialization() {
let id = generate_random_id(KeySetVersion::Version01);
let id_str = id.to_string();
assert!(id_str.chars().all(|c| c.is_ascii_hexdigit()));
assert_eq!(66, id_str.len());
assert_eq!(id_str.to_lowercase(), id_str);
}
#[test]
fn test_id_deserialization() {
let id_from_short_str = Id::from_str("00123");
assert!(matches!(id_from_short_str, Err(Error::Length)));
let id_from_non_hex_str = Id::from_str(&SHORT_KEYSET_ID.replace('a', "x"));
assert!(matches!(id_from_non_hex_str, Err(Error::HexError(_))));
let id_invalid_version = Id::from_str(&SHORT_KEYSET_ID.replace("00", "99"));
assert!(matches!(id_invalid_version, Err(Error::UnknownVersion)));
let id_from_uppercase = Id::from_str(&SHORT_KEYSET_ID.to_uppercase());
assert!(id_from_uppercase.is_ok());
}
#[test]
fn test_short_keyset_id_from_id() {
let idv1 = Id::from_str("009a1f293253e41e").unwrap();
let idv2 =
Id::from_str("01adc013fa9d85171586660abab27579888611659d357bc86bc09cb26eee8bc035")
.unwrap();
let short_id_1: ShortKeysetId = idv1.into();
let short_id_2: ShortKeysetId = idv2.into();
assert!(short_id_1.to_string() == "009a1f293253e41e");
assert!(short_id_2.to_string() == "01adc013fa9d8517");
}
#[test]
fn test_id_with_non_ascii_chars() {
// Test that non-ASCII characters in ID strings don't cause panics
// but instead return proper errors. This was found by fuzzing.
// The character 'ǝ' is a 2-byte UTF-8 sequence that could cause
// panics when slicing by byte index.
let id_with_non_ascii = Id::from_str("0ǝfa73302d12ff{");
assert!(matches!(id_with_non_ascii, Err(Error::HexError(_))));
// Also test ShortKeysetId
let short_id_with_non_ascii = ShortKeysetId::from_str("0ǝfa73302d12ff");
assert!(matches!(short_id_with_non_ascii, Err(Error::HexError(_))));
}
}