use schemars::JsonSchema;
use serde::{de, ser, Deserialize, Deserializer, Serialize};
use std::convert::TryFrom;
use std::fmt::{self, Write};
use std::ops;
use std::str::FromStr;
use bigint::U256;
use cosmwasm_std::{Decimal, StdError, Uint128};
#[derive(Copy, Clone, Default, Debug, PartialEq, Eq, PartialOrd, Ord, JsonSchema)]
pub struct Decimal256(#[schemars(with = "String")] pub U256);
impl Decimal256 {
pub const MAX: Decimal256 = Decimal256(U256::MAX);
pub const DECIMAL_FRACTIONAL: U256 = U256([1_000_000_000_000_000_000u64, 0, 0, 0]);
pub const fn one() -> Decimal256 {
Decimal256(Decimal256::DECIMAL_FRACTIONAL)
}
pub const fn zero() -> Decimal256 {
Decimal256(U256([0, 0, 0, 0]))
}
pub fn percent(x: u64) -> Decimal256 {
Decimal256(U256::from(x) * U256::from(10_000_000_000_000_000u64))
}
pub fn permille(x: u64) -> Decimal256 {
Decimal256(U256::from(x) * U256::from(1_000_000_000_000_000u64))
}
pub fn from_ratio<A: Into<U256>, B: Into<U256>>(nominator: A, denominator: B) -> Decimal256 {
let nominator: U256 = nominator.into();
let denominator: U256 = denominator.into();
if denominator.is_zero() {
panic!("Denominator must not be zero");
}
Decimal256(nominator * Decimal256::DECIMAL_FRACTIONAL / denominator)
}
pub fn from_uint256<A: Into<Uint256>>(val: A) -> Decimal256 {
let num: Uint256 = val.into();
Decimal256(num.0 * Decimal256::DECIMAL_FRACTIONAL)
}
pub fn is_zero(&self) -> bool {
self.0.is_zero()
}
}
impl From<Decimal> for Decimal256 {
fn from(val: Decimal) -> Self {
Decimal256::from_str(&val.to_string()).unwrap()
}
}
impl From<Decimal256> for Decimal {
fn from(n: Decimal256) -> Self {
let U256(ref arr) = n.0;
assert!(arr[2] == 0u64);
assert!(arr[3] == 0u64);
Decimal::from_str(&n.to_string()).unwrap()
}
}
impl FromStr for Decimal256 {
type Err = StdError;
fn from_str(input: &str) -> Result<Self, Self::Err> {
let parts: Vec<&str> = input.split('.').collect();
match parts.len() {
1 => {
let whole = U256::from_dec_str(parts[0])
.map_err(|_| StdError::generic_err("Error parsing whole"))?;
let whole_as_atomics = whole * Decimal256::DECIMAL_FRACTIONAL;
Ok(Decimal256(whole_as_atomics))
}
2 => {
let whole = U256::from_dec_str(parts[0])
.map_err(|_| StdError::generic_err("Error parsing whole"))?;
let fractional = U256::from_dec_str(parts[1])
.map_err(|_| StdError::generic_err("Error parsing fractional"))?;
let exp = (18usize.checked_sub(parts[1].len())).ok_or_else(|| {
StdError::generic_err("Cannot parse more than 18 fractional digits")
})?;
let fractional_factor = U256::from(10).pow(exp.into());
let whole_as_atomics = whole * Decimal256::DECIMAL_FRACTIONAL;
let atomics = whole_as_atomics + fractional * fractional_factor;
Ok(Decimal256(atomics))
}
_ => Err(StdError::generic_err("Unexpected number of dots")),
}
}
}
impl fmt::Display for Decimal256 {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
let whole = (self.0) / Decimal256::DECIMAL_FRACTIONAL;
let fractional = (self.0) % Decimal256::DECIMAL_FRACTIONAL;
if fractional.is_zero() {
write!(f, "{}", whole)
} else {
let fractional_string = fractional.to_string();
let fractional_string = "0".repeat(18 - fractional_string.len()) + &fractional_string;
f.write_str(&whole.to_string())?;
f.write_char('.')?;
f.write_str(fractional_string.trim_end_matches('0'))?;
Ok(())
}
}
}
impl ops::Add for Decimal256 {
type Output = Self;
fn add(self, rhs: Self) -> Self {
Decimal256(self.0 + rhs.0)
}
}
impl ops::AddAssign for Decimal256 {
fn add_assign(&mut self, rhs: Self) {
self.0 = self.0 + rhs.0;
}
}
impl ops::Sub for Decimal256 {
type Output = Self;
fn sub(self, rhs: Self) -> Self {
assert!(self.0 >= rhs.0);
Decimal256(self.0 - rhs.0)
}
}
impl ops::Mul for Decimal256 {
type Output = Self;
fn mul(self, rhs: Self) -> Self {
Decimal256(self.0 * rhs.0 / Decimal256::DECIMAL_FRACTIONAL)
}
}
impl ops::Div for Decimal256 {
type Output = Self;
fn div(self, rhs: Self) -> Self {
assert!(!rhs.is_zero());
Decimal256(self.0 * Decimal256::DECIMAL_FRACTIONAL / rhs.0)
}
}
impl Serialize for Decimal256 {
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where
S: ser::Serializer,
{
serializer.serialize_str(&self.to_string())
}
}
impl<'de> Deserialize<'de> for Decimal256 {
fn deserialize<D>(deserializer: D) -> Result<Decimal256, D::Error>
where
D: Deserializer<'de>,
{
deserializer.deserialize_str(Decimal256Visitor)
}
}
struct Decimal256Visitor;
impl<'de> de::Visitor<'de> for Decimal256Visitor {
type Value = Decimal256;
fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
formatter.write_str("string-encoded decimal")
}
fn visit_str<E>(self, v: &str) -> Result<Self::Value, E>
where
E: de::Error,
{
match Decimal256::from_str(v) {
Ok(d) => Ok(d),
Err(e) => Err(E::custom(format!("Error parsing decimal '{}': {}", v, e))),
}
}
}
#[derive(Copy, Clone, Default, Debug, PartialEq, Eq, PartialOrd, Ord, JsonSchema)]
pub struct Uint256(#[schemars(with = "String")] pub U256);
impl Uint256 {
pub const fn zero() -> Self {
Uint256(U256([0, 0, 0, 0]))
}
pub const fn one() -> Self {
Uint256(U256([1, 0, 0, 0]))
}
pub fn is_zero(&self) -> bool {
self.0.is_zero()
}
}
impl From<U256> for Uint256 {
fn from(val: U256) -> Self {
Uint256(val)
}
}
impl From<Uint256> for U256 {
fn from(val: Uint256) -> Self {
val.0
}
}
#[inline(always)]
fn split_u128(a: u128) -> (u64, u64) {
((a >> 64) as _, (a & 0xFFFFFFFFFFFFFFFF) as _)
}
impl From<Uint128> for Uint256 {
fn from(val: Uint128) -> Self {
Uint256::from(val.u128())
}
}
impl From<u128> for Uint256 {
fn from(val: u128) -> Self {
let (hi, low) = split_u128(val);
Uint256(U256([low, hi, 0, 0]))
}
}
impl From<u64> for Uint256 {
fn from(val: u64) -> Self {
Uint256(val.into())
}
}
impl TryFrom<&str> for Uint256 {
type Error = StdError;
fn try_from(val: &str) -> Result<Self, Self::Error> {
match U256::from_dec_str(val) {
Ok(u) => Ok(Uint256(u)),
Err(_e) => Err(StdError::generic_err(format!("invalid Uint256 '{}'", val))),
}
}
}
impl FromStr for Uint256 {
type Err = StdError;
fn from_str(input: &str) -> Result<Self, Self::Err> {
let number =
U256::from_dec_str(input).map_err(|_| StdError::generic_err("Error parsing number"))?;
Ok(Uint256(number))
}
}
impl From<Uint256> for String {
fn from(n: Uint256) -> Self {
n.0.to_string()
}
}
impl From<Uint256> for u128 {
fn from(n: Uint256) -> Self {
let U256(ref arr) = n.0;
assert!(arr[2] == 0u64);
assert!(arr[3] == 0u64);
let (hi, low) = (arr[1], arr[0]);
((hi as u128) << 64) + (low as u128)
}
}
impl From<Uint256> for Uint128 {
fn from(n: Uint256) -> Self {
let num: u128 = n.into();
Uint128::from(num)
}
}
impl fmt::Display for Uint256 {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "{}", self.0)
}
}
impl ops::Add for Uint256 {
type Output = Self;
fn add(self, rhs: Self) -> Self {
Uint256(self.0 + rhs.0)
}
}
impl ops::AddAssign for Uint256 {
fn add_assign(&mut self, other: Self) {
self.0 = self.0 + other.0;
}
}
impl ops::Sub for Uint256 {
type Output = Self;
fn sub(self, rhs: Self) -> Self::Output {
assert!(self.0 >= rhs.0);
Uint256(self.0 - rhs.0)
}
}
impl ops::Mul<Uint256> for Uint256 {
type Output = Self;
#[allow(clippy::suspicious_arithmetic_impl)]
fn mul(self, rhs: Uint256) -> Self::Output {
if self.is_zero() || rhs.is_zero() {
return Uint256::zero();
}
Uint256(self.0 * rhs.0)
}
}
impl ops::Mul<Decimal256> for Uint256 {
type Output = Self;
#[allow(clippy::suspicious_arithmetic_impl)]
fn mul(self, rhs: Decimal256) -> Self::Output {
if self.is_zero() || rhs.is_zero() {
return Uint256::zero();
}
self.multiply_ratio(rhs.0, Decimal256::DECIMAL_FRACTIONAL)
}
}
impl ops::Div<Decimal256> for Uint256 {
type Output = Self;
fn div(self, rhs: Decimal256) -> Self::Output {
assert!(!rhs.is_zero());
if self.is_zero() {
return Uint256::zero();
}
self.multiply_ratio(Decimal256::DECIMAL_FRACTIONAL, rhs.0)
}
}
impl ops::Mul<Uint256> for Decimal256 {
type Output = Uint256;
fn mul(self, rhs: Uint256) -> Self::Output {
rhs * self
}
}
impl Uint256 {
pub fn multiply_ratio<A: Into<U256>, B: Into<U256>>(&self, nom: A, denom: B) -> Uint256 {
let nominator: U256 = nom.into();
let denominator: U256 = denom.into();
if denominator.is_zero() {
panic!("Denominator must not be zero");
}
let val = self.0 * nominator / denominator;
Uint256::from(val)
}
}
impl Serialize for Uint256 {
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where
S: ser::Serializer,
{
serializer.serialize_str(&self.to_string())
}
}
impl<'de> Deserialize<'de> for Uint256 {
fn deserialize<D>(deserializer: D) -> Result<Uint256, D::Error>
where
D: Deserializer<'de>,
{
deserializer.deserialize_str(Uint256Visitor)
}
}
struct Uint256Visitor;
impl<'de> de::Visitor<'de> for Uint256Visitor {
type Value = Uint256;
fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
formatter.write_str("string-encoded integer")
}
fn visit_str<E>(self, v: &str) -> Result<Self::Value, E>
where
E: de::Error,
{
match U256::from_dec_str(v) {
Ok(u) => Ok(Uint256(u)),
Err(_e) => Err(E::custom(format!("invalid Uint256 '{}'", v))),
}
}
}
#[cfg(test)]
mod test {
use super::*;
use cosmwasm_std::{from_slice, to_vec, StdResult};
use std::convert::TryInto;
#[test]
fn decimal_one() {
let value = Decimal256::one();
assert_eq!(value.0, Decimal256::DECIMAL_FRACTIONAL);
}
#[test]
fn decimal_zero() {
let value = Decimal256::zero();
assert_eq!(value.0, U256::zero());
}
#[test]
fn decimal_percent() {
let value = Decimal256::percent(50);
assert_eq!(value.0, Decimal256::DECIMAL_FRACTIONAL / 2.into());
}
#[test]
fn decimal_permille() {
let value = Decimal256::permille(125);
assert_eq!(value.0, Decimal256::DECIMAL_FRACTIONAL / 8.into());
}
#[test]
fn decimal_from_ratio_works() {
assert_eq!(Decimal256::from_ratio(1, 1), Decimal256::one());
assert_eq!(Decimal256::from_ratio(53, 53), Decimal256::one());
assert_eq!(Decimal256::from_ratio(125, 125), Decimal256::one());
assert_eq!(Decimal256::from_ratio(3, 2), Decimal256::percent(150));
assert_eq!(Decimal256::from_ratio(150, 100), Decimal256::percent(150));
assert_eq!(Decimal256::from_ratio(333, 222), Decimal256::percent(150));
assert_eq!(Decimal256::from_ratio(1, 8), Decimal256::permille(125));
assert_eq!(Decimal256::from_ratio(125, 1000), Decimal256::permille(125));
assert_eq!(
Decimal256::from_ratio(1, 3),
Decimal256(0_333_333_333_333_333_333u64.into())
);
assert_eq!(
Decimal256::from_ratio(2, 3),
Decimal256(0_666_666_666_666_666_666u64.into())
);
}
#[test]
#[should_panic(expected = "Denominator must not be zero")]
fn decimal_from_ratio_panics_for_zero_denominator() {
Decimal256::from_ratio(1, 0);
}
#[test]
fn decimal_from_str_works() {
assert_eq!(Decimal256::from_str("").unwrap(), Decimal256::percent(0));
assert_eq!(Decimal256::from_str("0").unwrap(), Decimal256::percent(0));
assert_eq!(Decimal256::from_str("1").unwrap(), Decimal256::percent(100));
assert_eq!(Decimal256::from_str("5").unwrap(), Decimal256::percent(500));
assert_eq!(
Decimal256::from_str("42").unwrap(),
Decimal256::percent(4200)
);
assert_eq!(Decimal256::from_str("000").unwrap(), Decimal256::percent(0));
assert_eq!(
Decimal256::from_str("001").unwrap(),
Decimal256::percent(100)
);
assert_eq!(
Decimal256::from_str("005").unwrap(),
Decimal256::percent(500)
);
assert_eq!(
Decimal256::from_str("0042").unwrap(),
Decimal256::percent(4200)
);
assert_eq!(
Decimal256::from_str("1.").unwrap(),
Decimal256::percent(100)
);
assert_eq!(
Decimal256::from_str("1.0").unwrap(),
Decimal256::percent(100)
);
assert_eq!(
Decimal256::from_str("1.5").unwrap(),
Decimal256::percent(150)
);
assert_eq!(
Decimal256::from_str("0.5").unwrap(),
Decimal256::percent(50)
);
assert_eq!(
Decimal256::from_str("0.123").unwrap(),
Decimal256::permille(123)
);
assert_eq!(
Decimal256::from_str("40.00").unwrap(),
Decimal256::percent(4000)
);
assert_eq!(
Decimal256::from_str("04.00").unwrap(),
Decimal256::percent(0400)
);
assert_eq!(
Decimal256::from_str("00.40").unwrap(),
Decimal256::percent(0040)
);
assert_eq!(
Decimal256::from_str("00.04").unwrap(),
Decimal256::percent(0004)
);
assert_eq!(
Decimal256::from_str("7.123456789012345678").unwrap(),
Decimal256(7123456789012345678u64.into())
);
assert_eq!(
Decimal256::from_str("7.999999999999999999").unwrap(),
Decimal256(7999999999999999999u64.into())
);
assert_eq!(
Decimal256::from_str(
"115792089237316195423570985008687907853269984665640564039457.584007913129639935"
)
.unwrap(),
Decimal256::MAX
);
}
#[test]
fn decimal_from_str_errors_for_broken_whole_part() {
match Decimal256::from_str(" ").unwrap_err() {
StdError::GenericErr { msg, .. } => assert_eq!(msg, "Error parsing whole"),
e => panic!("Unexpected error: {:?}", e),
}
match Decimal256::from_str("-1").unwrap_err() {
StdError::GenericErr { msg, .. } => assert_eq!(msg, "Error parsing whole"),
e => panic!("Unexpected error: {:?}", e),
}
}
#[test]
fn decimal_from_str_errors_for_broken_fractinal_part() {
match Decimal256::from_str("1. ").unwrap_err() {
StdError::GenericErr { msg, .. } => assert_eq!(msg, "Error parsing fractional"),
e => panic!("Unexpected error: {:?}", e),
}
match Decimal256::from_str("1.e").unwrap_err() {
StdError::GenericErr { msg, .. } => assert_eq!(msg, "Error parsing fractional"),
e => panic!("Unexpected error: {:?}", e),
}
match Decimal256::from_str("1.2e3").unwrap_err() {
StdError::GenericErr { msg, .. } => assert_eq!(msg, "Error parsing fractional"),
e => panic!("Unexpected error: {:?}", e),
}
}
#[test]
fn decimal_from_str_errors_for_more_than_18_fractional_digits() {
match Decimal256::from_str("7.1234567890123456789").unwrap_err() {
StdError::GenericErr { msg, .. } => {
assert_eq!(msg, "Cannot parse more than 18 fractional digits")
}
e => panic!("Unexpected error: {:?}", e),
}
match Decimal256::from_str("7.1230000000000000000").unwrap_err() {
StdError::GenericErr { msg, .. } => {
assert_eq!(msg, "Cannot parse more than 18 fractional digits")
}
e => panic!("Unexpected error: {:?}", e),
}
}
#[test]
fn decimal_from_str_errors_for_invalid_number_of_dots() {
match Decimal256::from_str("1.2.3").unwrap_err() {
StdError::GenericErr { msg, .. } => assert_eq!(msg, "Unexpected number of dots"),
e => panic!("Unexpected error: {:?}", e),
}
match Decimal256::from_str("1.2.3.4").unwrap_err() {
StdError::GenericErr { msg, .. } => assert_eq!(msg, "Unexpected number of dots"),
e => panic!("Unexpected error: {:?}", e),
}
}
#[test]
#[should_panic(expected = "arithmetic operation overflow")]
fn decimal_from_str_errors_for_more_than_max_value_integer_part() {
let _ =
Decimal256::from_str("115792089237316195423570985008687907853269984665640564039458");
}
#[test]
#[should_panic(expected = "arithmetic operation overflow")]
fn decimal_from_str_errors_for_more_than_max_value_integer_part_with_decimal() {
let _ =
Decimal256::from_str("115792089237316195423570985008687907853269984665640564039458.0");
}
#[test]
#[should_panic(expected = "arithmetic operation overflow")]
fn decimal_from_str_errors_for_more_than_max_value_decimal_part() {
let _ = Decimal256::from_str(
"115792089237316195423570985008687907853269984665640564039457.584007913129639936",
);
}
#[test]
fn decimal_is_zero_works() {
assert_eq!(Decimal256::zero().is_zero(), true);
assert_eq!(Decimal256::percent(0).is_zero(), true);
assert_eq!(Decimal256::permille(0).is_zero(), true);
assert_eq!(Decimal256::one().is_zero(), false);
assert_eq!(Decimal256::percent(123).is_zero(), false);
assert_eq!(Decimal256::permille(1234).is_zero(), false);
}
#[test]
fn decimal_add() {
let value = Decimal256::one() + Decimal256::percent(50); assert_eq!(
value.0,
Decimal256::DECIMAL_FRACTIONAL * U256::from(3) / U256::from(2)
);
}
#[test]
fn decimal_sub() {
assert_eq!(
Decimal256::percent(50),
Decimal256::one() - Decimal256::percent(50)
);
}
#[test]
fn decimal_mul() {
assert_eq!(
Decimal256::percent(25),
Decimal256::percent(50) * Decimal256::percent(50)
);
}
#[test]
fn decimal_div() {
assert_eq!(
Decimal256::one() + Decimal256::one(),
Decimal256::percent(50) / Decimal256::percent(25)
);
}
#[test]
fn decimal_to_string() {
assert_eq!(Decimal256::zero().to_string(), "0");
assert_eq!(Decimal256::one().to_string(), "1");
assert_eq!(Decimal256::percent(500).to_string(), "5");
assert_eq!(Decimal256::percent(125).to_string(), "1.25");
assert_eq!(Decimal256::percent(42638).to_string(), "426.38");
assert_eq!(Decimal256::percent(1).to_string(), "0.01");
assert_eq!(Decimal256::permille(987).to_string(), "0.987");
assert_eq!(Decimal256(1u64.into()).to_string(), "0.000000000000000001");
assert_eq!(Decimal256(10u64.into()).to_string(), "0.00000000000000001");
assert_eq!(Decimal256(100u64.into()).to_string(), "0.0000000000000001");
assert_eq!(Decimal256(1000u64.into()).to_string(), "0.000000000000001");
assert_eq!(Decimal256(10000u64.into()).to_string(), "0.00000000000001");
assert_eq!(Decimal256(100000u64.into()).to_string(), "0.0000000000001");
assert_eq!(Decimal256(1000000u64.into()).to_string(), "0.000000000001");
assert_eq!(Decimal256(10000000u64.into()).to_string(), "0.00000000001");
assert_eq!(Decimal256(100000000u64.into()).to_string(), "0.0000000001");
assert_eq!(Decimal256(1000000000u64.into()).to_string(), "0.000000001");
assert_eq!(Decimal256(10000000000u64.into()).to_string(), "0.00000001");
assert_eq!(Decimal256(100000000000u64.into()).to_string(), "0.0000001");
assert_eq!(Decimal256(10000000000000u64.into()).to_string(), "0.00001");
assert_eq!(Decimal256(100000000000000u64.into()).to_string(), "0.0001");
assert_eq!(Decimal256(1000000000000000u64.into()).to_string(), "0.001");
assert_eq!(Decimal256(10000000000000000u64.into()).to_string(), "0.01");
assert_eq!(Decimal256(100000000000000000u64.into()).to_string(), "0.1");
}
#[test]
fn decimal_serialize() {
assert_eq!(to_vec(&Decimal256::zero()).unwrap(), br#""0""#);
assert_eq!(to_vec(&Decimal256::one()).unwrap(), br#""1""#);
assert_eq!(to_vec(&Decimal256::percent(8)).unwrap(), br#""0.08""#);
assert_eq!(to_vec(&Decimal256::percent(87)).unwrap(), br#""0.87""#);
assert_eq!(to_vec(&Decimal256::percent(876)).unwrap(), br#""8.76""#);
assert_eq!(to_vec(&Decimal256::percent(8765)).unwrap(), br#""87.65""#);
}
#[test]
fn decimal_deserialize() {
assert_eq!(
from_slice::<Decimal256>(br#""0""#).unwrap(),
Decimal256::zero()
);
assert_eq!(
from_slice::<Decimal256>(br#""1""#).unwrap(),
Decimal256::one()
);
assert_eq!(
from_slice::<Decimal256>(br#""000""#).unwrap(),
Decimal256::zero()
);
assert_eq!(
from_slice::<Decimal256>(br#""001""#).unwrap(),
Decimal256::one()
);
assert_eq!(
from_slice::<Decimal256>(br#""0.08""#).unwrap(),
Decimal256::percent(8)
);
assert_eq!(
from_slice::<Decimal256>(br#""0.87""#).unwrap(),
Decimal256::percent(87)
);
assert_eq!(
from_slice::<Decimal256>(br#""8.76""#).unwrap(),
Decimal256::percent(876)
);
assert_eq!(
from_slice::<Decimal256>(br#""87.65""#).unwrap(),
Decimal256::percent(8765)
);
}
#[test]
fn to_and_from_uint256() {
let a: Uint256 = 12345u64.into();
assert_eq!(U256::from(12345), a.0);
assert_eq!("12345", a.to_string());
let a: Uint256 = "34567".try_into().unwrap();
assert_eq!(U256::from(34567), a.0);
assert_eq!("34567", a.to_string());
let a: StdResult<Uint256> = "1.23".try_into();
assert!(a.is_err());
}
#[test]
fn uint256_is_zero_works() {
assert_eq!(Uint256::zero().is_zero(), true);
assert_eq!(Uint256::from(0u64).is_zero(), true);
assert_eq!(Uint256::from(1u64).is_zero(), false);
assert_eq!(Uint256::from(123u64).is_zero(), false);
}
#[test]
fn uint256_json() {
let orig = Uint256::from(1234567890987654321u64);
let serialized = to_vec(&orig).unwrap();
assert_eq!(serialized.as_slice(), b"\"1234567890987654321\"");
let parsed: Uint256 = from_slice(&serialized).unwrap();
assert_eq!(parsed, orig);
}
#[test]
fn uint256_compare() {
let a = Uint256::from(12345u64);
let b = Uint256::from(23456u64);
assert!(a < b);
assert!(b > a);
assert_eq!(a, Uint256::from(12345u64));
}
#[test]
fn uint256_math() {
let a = Uint256::from(12345u64);
let b = Uint256::from(23456u64);
assert_eq!(a + b, Uint256::from(35801u64));
assert_eq!(b - a, Uint256::from(11111u64));
let mut c = Uint256::from(300000u64);
c += b;
assert_eq!(c, Uint256::from(323456u64));
}
#[test]
#[should_panic]
fn uint256_math_sub_underflow() {
let _ = Uint256::from(12345u64) - Uint256::from(23456u64);
}
#[test]
#[should_panic]
fn uint256_math_overflow_panics() {
let almost_max = Uint256::from(U256([
18446744073709551615,
18446744073709551615,
18446744073709551615,
18446744073709551615,
]));
let _ = almost_max + Uint256::from(12u64);
}
#[test]
fn uint256_decimal_multiply() {
let left = Uint256::from(300u64);
let right = Decimal256::one() + Decimal256::percent(50); assert_eq!(left * right, Uint256::from(450u64));
let left = Uint256::from(300u64);
let right = Decimal256::zero();
assert_eq!(left * right, Uint256::from(0u64));
let left = Uint256::zero();
let right = Decimal256::one() + Decimal256::percent(50); assert_eq!(left * right, Uint256::zero());
}
#[test]
fn u256_multiply_ratio_works() {
let base = Uint256::from(500u64);
assert_eq!(base.multiply_ratio(1, 1), Uint256::from(500u64));
assert_eq!(base.multiply_ratio(3, 3), Uint256::from(500u64));
assert_eq!(base.multiply_ratio(654321, 654321), Uint256::from(500u64));
assert_eq!(base.multiply_ratio(3, 2), Uint256::from(750u64));
assert_eq!(base.multiply_ratio(333333, 222222), Uint256::from(750u64));
assert_eq!(base.multiply_ratio(2, 3), Uint256::from(333u64));
assert_eq!(base.multiply_ratio(222222, 333333), Uint256::from(333u64));
assert_eq!(base.multiply_ratio(5, 6), Uint256::from(416u64));
assert_eq!(base.multiply_ratio(100, 120), Uint256::from(416u64));
}
#[test]
fn u256_from_u128() {
assert_eq!(Uint256::from(100u64), Uint256::from(100u128));
let num = Uint256::from(1_000_000_000_000_000_000_000_000u128);
assert_eq!(num.to_string(), "1000000000000000000000000");
}
#[test]
#[should_panic(expected = "Denominator must not be zero")]
fn u256_multiply_ratio_panics_for_zero_denominator() {
Uint256::from(500u64).multiply_ratio(1, 0);
}
#[test]
fn u256_zero_one() {
assert_eq!(Uint256::zero().0, U256::zero());
assert_eq!(Uint256::one().0, U256::one());
}
#[test]
fn u256_into_u128() {
let val: u128 = Uint256::from(1234556700000000000999u128).into();
assert_eq!(val, 1234556700000000000999u128);
}
#[test]
#[should_panic]
fn u256_into_u128_panics_for_overflow() {
let _: u128 = Uint256::from_str("2134982317498312749832174923184732198471983247")
.unwrap()
.into();
}
#[test]
fn decimal_uint256_multiply() {
let left = Decimal256::one() + Decimal256::percent(50); let right = Uint256::from(300u64);
assert_eq!(left * right, Uint256::from(450u64));
let left = Decimal256::zero();
let right = Uint256::from(300u64);
assert_eq!(left * right, Uint256::from(0u64));
let left = Decimal256::one() + Decimal256::percent(50); let right = Uint256::from(0u64);
assert_eq!(left * right, Uint256::from(0u64));
}
}