#![allow(clippy::result_large_err)]
mod builder;
mod dbc;
mod dbc_ciphers;
mod dbc_id;
mod error;
mod fee_output;
mod signed_spend;
mod spentbook;
mod token;
mod transaction;
#[cfg(feature = "mock")]
pub mod mock;
pub use crate::{
builder::{DbcBuilder, TransactionBuilder},
dbc::Dbc,
dbc_ciphers::DbcSecrets,
dbc_id::{random_derivation_index, DbcId, DerivationIndex, DerivedKey, MainKey, PublicAddress},
error::{Error, Result},
fee_output::FeeOutput,
signed_spend::{SignedSpend, Spend},
token::Token,
transaction::{DbcTransaction, Input, Output},
};
pub use blsttc::{self, rand, Ciphertext, PublicKey, PublicKeySet, Signature, SignatureShare};
#[cfg(feature = "serde")]
use serde::{Deserialize, Serialize};
use std::{fmt, str::FromStr};
#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
#[derive(Clone, Copy, PartialEq, Eq, Hash, PartialOrd, Ord, Default)]
pub struct Hash([u8; 32]);
impl Hash {
#[allow(clippy::self_named_constructors)]
pub fn hash(input: &[u8]) -> Self {
Self::from(sha3_256(input))
}
pub fn slice(&self) -> &[u8; 32] {
&self.0
}
pub fn from_hex(hex: &str) -> Result<Self, Error> {
let mut h = Self::default();
hex::decode_to_slice(hex, &mut h.0)
.map_err(|e| Error::HexDeserializationFailed(e.to_string()))?;
Ok(h)
}
pub fn to_hex(&self) -> String {
hex::encode(self.0)
}
}
impl FromStr for Hash {
type Err = Error;
fn from_str(s: &str) -> std::result::Result<Self, Self::Err> {
Hash::from_hex(s)
}
}
impl From<[u8; 32]> for Hash {
fn from(val: [u8; 32]) -> Hash {
Hash(val)
}
}
impl fmt::Debug for Hash {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.debug_tuple("Hash").field(&self.to_hex()).finish()
}
}
impl AsRef<[u8]> for Hash {
fn as_ref(&self) -> &[u8] {
&self.0
}
}
pub mod rng {
use crate::rand::{
rngs::{StdRng, ThreadRng},
SeedableRng,
};
pub fn thread_rng() -> ThreadRng {
crate::rand::thread_rng()
}
pub fn from_seed(seed: <StdRng as SeedableRng>::Seed) -> StdRng {
StdRng::from_seed(seed)
}
}
pub(crate) fn sha3_256(input: &[u8]) -> [u8; 32] {
use tiny_keccak::{Hasher, Sha3};
let mut sha3 = Sha3::v256();
let mut output = [0; 32];
sha3.update(input);
sha3.finalize(&mut output);
output
}
#[cfg(test)]
mod tests {
use super::*;
use quickcheck::{Arbitrary, Gen};
#[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord)]
pub struct TinyInt(pub u8);
impl TinyInt {
pub fn coerce<T: From<u8>>(self) -> T {
self.0.into()
}
}
impl std::fmt::Debug for TinyInt {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
write!(f, "{}", self.0)
}
}
impl Arbitrary for TinyInt {
fn arbitrary(g: &mut Gen) -> Self {
Self(u8::arbitrary(g) % 5)
}
fn shrink(&self) -> Box<dyn Iterator<Item = Self>> {
Box::new((0..(self.0)).rev().map(Self))
}
}
#[derive(Clone, PartialEq, Eq, PartialOrd, Ord)]
pub struct TinyVec<T>(pub Vec<T>);
impl<T> TinyVec<T> {
pub fn into_iter(self) -> impl Iterator<Item = T> {
self.0.into_iter()
}
}
impl<T: std::fmt::Debug> std::fmt::Debug for TinyVec<T> {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
write!(f, "{:?}", self.0)
}
}
impl<T: Arbitrary> Arbitrary for TinyVec<T> {
fn arbitrary(g: &mut Gen) -> Self {
let n = u8::arbitrary(g) % 7;
let mut vec = Vec::new();
for _ in 0..n {
vec.push(T::arbitrary(g));
}
Self(vec)
}
fn shrink(&self) -> Box<dyn Iterator<Item = Self>> {
Box::new(self.0.shrink().map(Self))
}
}
#[test]
fn hash() {
let data = b"hello world";
let expected = b"\
\x64\x4b\xcc\x7e\x56\x43\x73\x04\x09\x99\xaa\xc8\x9e\x76\x22\xf3\
\xca\x71\xfb\xa1\xd9\x72\xfd\x94\xa3\x1c\x3b\xfb\xf2\x4e\x39\x38\
";
assert_eq!(sha3_256(data), *expected);
let hash = Hash::hash(data);
assert_eq!(hash.slice(), expected);
}
#[test]
fn hex_encoding() {
let data = b"hello world";
let expected_hex = "644bcc7e564373040999aac89e7622f3ca71fba1d972fd94a31c3bfbf24e3938";
let hash = Hash::hash(data);
assert_eq!(hash.to_hex(), expected_hex.to_string());
assert_eq!(Hash::from_hex(expected_hex), Ok(hash));
let too_long_hex = format!("{expected_hex}ab");
assert_eq!(
Hash::from_hex(&too_long_hex),
Err(Error::HexDeserializationFailed(
"Invalid string length".to_string()
))
);
assert_eq!(
Hash::from_hex(&expected_hex[0..30]),
Err(Error::HexDeserializationFailed(
"Invalid string length".to_string()
))
);
}
}