Type Alias ChannelId

pub type ChannelId = U256;

Channel identity.

Aliased Type

struct ChannelId(pub [u64; 4]);

Fields

0: [u64; 4]

Implementations

impl U256

pub fn full_mul(self, other: U256) -> U512

Multiplies two 256-bit integers to produce full 512-bit integer. Overflow is not possible.

impl U256

pub const fn low_u128(&self) -> u128

Low 2 words (u128)

pub fn as_u128(&self) -> u128

Conversion to u128 with overflow checking

Panics

Panics if the number is larger than 2^128.

impl U256

pub const MAX: U256

Maximum value.

pub fn from_str_radix(txt: &str, radix: u32) -> Result<U256, FromStrRadixErr>

Converts a string slice in a given base to an integer. Only supports radixes of 10 and 16.

pub fn from_dec_str(value: &str) -> Result<U256, FromDecStrErr>

Convert from a decimal string.

pub const fn low_u32(&self) -> u32

Conversion to u32

pub const fn low_u64(&self) -> u64

Low word (u64)

pub fn as_u32(&self) -> u32

Conversion to u32 with overflow checking

Panics

Panics if the number is larger than 2^32.

pub fn as_u64(&self) -> u64

Conversion to u64 with overflow checking

Panics

Panics if the number is larger than u64::max_value().

pub fn as_usize(&self) -> usize

Conversion to usize with overflow checking

Panics

Panics if the number is larger than usize::max_value().

pub const fn is_zero(&self) -> bool

Whether this is zero.

pub fn bits(&self) -> usize

Return the least number of bits needed to represent the number

pub const fn bit(&self, index: usize) -> bool

Return if specific bit is set.

Panics

Panics if index exceeds the bit width of the number.

pub fn leading_zeros(&self) -> u32

Returns the number of leading zeros in the binary representation of self.

pub fn trailing_zeros(&self) -> u32

Returns the number of trailing zeros in the binary representation of self.

pub const fn byte(&self, index: usize) -> u8

Return specific byte. Byte 0 is the least significant value (ie~ little endian).

Panics

Panics if index exceeds the byte width of the number.

pub fn to_big_endian(&self) -> [u8; 32]

Convert to big-endian bytes.

pub fn write_as_big_endian(&self, bytes: &mut [u8])

Write to the slice in big-endian format.

pub fn to_little_endian(&self) -> [u8; 32]

Convert to little-endian bytes.

pub fn write_as_little_endian(&self, bytes: &mut [u8])

pub fn exp10(n: usize) -> U256

Create 10**n as this type.

Panics

Panics if the result overflows the type.

pub const fn zero() -> U256

Zero (additive identity) of this type.

pub const fn one() -> U256

One (multiplicative identity) of this type.

pub const fn max_value() -> U256

The maximum value which can be inhabited by this type.

pub fn div_mod(self, other: U256) -> (U256, U256)

Returns a pair (self / other, self % other).

Panics

Panics if other is zero.

pub fn integer_sqrt(&self) -> U256

Compute the highest n such that n * n <= self.

pub fn pow(self, expon: U256) -> U256

Fast exponentiation by squaring https://en.wikipedia.org/wiki/Exponentiation_by_squaring

Panics

Panics if the result overflows the type.

pub fn overflowing_pow(self, expon: U256) -> (U256, bool)

Fast exponentiation by squaring. Returns result and overflow flag.

pub fn checked_pow(self, expon: U256) -> Option<U256>

Checked exponentiation. Returns None if overflow occurred.

pub fn overflowing_add(self, other: U256) -> (U256, bool)

Addition which overflows and returns a flag if it does.

pub fn saturating_add(self, other: U256) -> U256

Addition which saturates at the maximum value (Self::MAX).

pub fn checked_add(self, other: U256) -> Option<U256>

Checked addition. Returns None if overflow occurred.

pub fn overflowing_sub(self, other: U256) -> (U256, bool)

Subtraction which underflows and returns a flag if it does.

pub fn saturating_sub(self, other: U256) -> U256

Subtraction which saturates at zero.

pub fn checked_sub(self, other: U256) -> Option<U256>

Checked subtraction. Returns None if overflow occurred.

pub fn abs_diff(self, other: U256) -> U256

Computes the absolute difference between self and other.

pub fn overflowing_mul(self, other: U256) -> (U256, bool)

Multiply with overflow, returning a flag if it does.

pub fn saturating_mul(self, other: U256) -> U256

Multiplication which saturates at the maximum value..

pub fn checked_mul(self, other: U256) -> Option<U256>

Checked multiplication. Returns None if overflow occurred.

pub fn checked_div(self, other: U256) -> Option<U256>

Checked division. Returns None if other == 0.

pub fn checked_rem(self, other: U256) -> Option<U256>

Checked modulus. Returns None if other == 0.

pub fn overflowing_neg(self) -> (U256, bool)

Negation with overflow.

pub fn checked_neg(self) -> Option<U256>

Checked negation. Returns None unless self == 0.

pub fn from_big_endian(slice: &[u8]) -> U256

Converts from big endian representation bytes in memory.

pub fn from_little_endian(slice: &[u8]) -> U256

Converts from little endian representation bytes in memory.

Trait Implementations

impl<T> Add<T> for U256

where T: Into<U256>,

type Output = U256

The resulting type after applying the + operator.

fn add(self, other: T) -> U256

Performs the + operation.

impl AddAssign for U256

fn add_assign(&mut self, other: U256)

Performs the += operation.

impl AsRef<[u64]> for U256

Get a reference to the underlying little-endian words.

fn as_ref(&self) -> &[u64]

Converts this type into a shared reference of the (usually inferred) input type.

impl BitAnd for U256

type Output = U256

The resulting type after applying the & operator.

fn bitand(self, other: U256) -> U256

Performs the & operation.

impl BitAndAssign for U256

fn bitand_assign(&mut self, rhs: U256)

Performs the &= operation.

impl BitOr for U256

type Output = U256

The resulting type after applying the | operator.

fn bitor(self, other: U256) -> U256

Performs the | operation.

impl BitOrAssign for U256

fn bitor_assign(&mut self, rhs: U256)

Performs the |= operation.

impl BitXor for U256

type Output = U256

The resulting type after applying the ^ operator.

fn bitxor(self, other: U256) -> U256

Performs the ^ operation.

impl BitXorAssign for U256

fn bitxor_assign(&mut self, rhs: U256)

Performs the ^= operation.

impl CheckedAdd for U256

fn checked_add(&self, v: &U256) -> Option<U256>

Adds two numbers, checking for overflow. If overflow happens, None is returned.

impl CheckedDiv for U256

fn checked_div(&self, v: &U256) -> Option<U256>

Divides two numbers, checking for underflow, overflow and division by zero. If any of that happens, None is returned.

impl CheckedMul for U256

fn checked_mul(&self, v: &U256) -> Option<U256>

Multiplies two numbers, checking for underflow or overflow. If underflow or overflow happens, None is returned.

impl CheckedSub for U256

fn checked_sub(&self, v: &U256) -> Option<U256>

Subtracts two numbers, checking for underflow. If underflow happens, None is returned.

impl Clone for U256

fn clone(&self) -> U256

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for U256

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Decodable for U256

fn decode(rlp: &Rlp<'_>) -> Result<U256, DecoderError>

Decode a value from RLP bytes

impl Decode for U256

fn decode<I>(input: &mut I) -> Result<U256, Error>

where I: Input,

Attempt to deserialise the value from input.

fn decode_into<I>( input: &mut I, dst: &mut MaybeUninit<Self>, ) -> Result<DecodeFinished, Error>

where I: Input,

Attempt to deserialize the value from input into a pre-allocated piece of memory.

fn skip<I>(input: &mut I) -> Result<(), Error>

where I: Input,

Attempt to skip the encoded value from input.

fn encoded_fixed_size() -> Option<usize>

Returns the fixed encoded size of the type.

impl Default for U256

fn default() -> U256

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for U256

fn deserialize<D>( deserializer: D, ) -> Result<U256, <D as Deserializer<'de>>::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for U256

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl<T> Div<T> for U256

where T: Into<U256>,

type Output = U256

The resulting type after applying the / operator.

fn div(self, other: T) -> U256

Performs the / operation.

impl<T> DivAssign<T> for U256

where T: Into<U256>,

fn div_assign(&mut self, other: T)

Performs the /= operation.

impl Encodable for U256

fn rlp_append(&self, s: &mut RlpStream)

Append a value to the stream

fn rlp_bytes(&self) -> BytesMut

Get rlp-encoded bytes for this instance

impl Encode for U256

fn using_encoded<R, F>(&self, f: F) -> R

where F: FnOnce(&[u8]) -> R,

Convert self to a slice and then invoke the given closure with it.

fn size_hint(&self) -> usize

If possible give a hint of expected size of the encoding.

fn encode_to<T>(&self, dest: &mut T)

where T: Output + ?Sized,

Convert self to a slice and append it to the destination.

fn encode(&self) -> Vec<u8>

Convert self to an owned vector.

fn encoded_size(&self) -> usize

Calculates the encoded size.

impl<'a> From<&'a U256> for U256

fn from(x: &'a U256) -> U256

Converts to this type from the input type.

impl From<&'static str> for U256

fn from(s: &'static str) -> U256

Converts to this type from the input type.

impl From<U128> for U256

fn from(value: U128) -> U256

Converts to this type from the input type.

impl From<i128> for U256

fn from(value: i128) -> U256

Converts to this type from the input type.

impl From<i16> for U256

fn from(value: i16) -> U256

Converts to this type from the input type.

impl From<i32> for U256

fn from(value: i32) -> U256

Converts to this type from the input type.

impl From<i64> for U256

fn from(value: i64) -> U256

Converts to this type from the input type.

impl From<i8> for U256

fn from(value: i8) -> U256

Converts to this type from the input type.

impl From<isize> for U256

fn from(value: isize) -> U256

Converts to this type from the input type.

impl From<u128> for U256

fn from(value: u128) -> U256

Converts to this type from the input type.

impl From<u16> for U256

fn from(value: u16) -> U256

Converts to this type from the input type.

impl From<u32> for U256

fn from(value: u32) -> U256

Converts to this type from the input type.

impl From<u64> for U256

fn from(value: u64) -> U256

Converts to this type from the input type.

impl From<u8> for U256

fn from(value: u8) -> U256

Converts to this type from the input type.

impl From<usize> for U256

fn from(value: usize) -> U256

Converts to this type from the input type.

impl FromEntropy for U256

fn from_entropy(input: &mut impl Input) -> Result<U256, Error>

Create a random value of Self given a stream of random bytes on input. May only fail if input has an error.

impl FromStr for U256

type Err = FromHexError

The associated error which can be returned from parsing.

fn from_str(value: &str) -> Result<U256, <U256 as FromStr>::Err>

Parses a string s to return a value of this type.

impl Hash for U256

fn hash<__H>(&self, state: &mut __H)

where __H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl IntegerSquareRoot for U256

fn integer_sqrt_checked(&self) -> Option<U256>

Find the integer square root, returning None if the number is negative (this can never happen for unsigned types).

fn integer_sqrt(&self) -> Self

where Self: Sized,

Find the integer square root.

impl LowerHex for U256

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl MaxEncodedLen for U256

fn max_encoded_len() -> usize

Upper bound, in bytes, of the maximum encoded size of this item.

impl<'a> Mul<&'a U256> for U256

type Output = U256

The resulting type after applying the * operator.

fn mul(self, other: &'a U256) -> U256

Performs the * operation.

impl<'a> Mul<&'a i16> for U256

type Output = U256

The resulting type after applying the * operator.

fn mul(self, other: &'a i16) -> U256

Performs the * operation.

impl<'a> Mul<&'a i32> for U256

type Output = U256

The resulting type after applying the * operator.

fn mul(self, other: &'a i32) -> U256

Performs the * operation.

impl<'a> Mul<&'a i64> for U256

type Output = U256

The resulting type after applying the * operator.

fn mul(self, other: &'a i64) -> U256

Performs the * operation.

impl<'a> Mul<&'a i8> for U256

type Output = U256

The resulting type after applying the * operator.

fn mul(self, other: &'a i8) -> U256

Performs the * operation.

impl<'a> Mul<&'a isize> for U256

type Output = U256

The resulting type after applying the * operator.

fn mul(self, other: &'a isize) -> U256

Performs the * operation.

impl<'a> Mul<&'a u16> for U256

type Output = U256

The resulting type after applying the * operator.

fn mul(self, other: &'a u16) -> U256

Performs the * operation.

impl<'a> Mul<&'a u32> for U256

type Output = U256

The resulting type after applying the * operator.

fn mul(self, other: &'a u32) -> U256

Performs the * operation.

impl<'a> Mul<&'a u64> for U256

type Output = U256

The resulting type after applying the * operator.

fn mul(self, other: &'a u64) -> U256

Performs the * operation.

impl<'a> Mul<&'a u8> for U256

type Output = U256

The resulting type after applying the * operator.

fn mul(self, other: &'a u8) -> U256

Performs the * operation.

impl<'a> Mul<&'a usize> for U256

type Output = U256

The resulting type after applying the * operator.

fn mul(self, other: &'a usize) -> U256

Performs the * operation.

impl Mul<i16> for U256

type Output = U256

The resulting type after applying the * operator.

fn mul(self, other: i16) -> U256

Performs the * operation.

impl Mul<i32> for U256

type Output = U256

The resulting type after applying the * operator.

fn mul(self, other: i32) -> U256

Performs the * operation.

impl Mul<i64> for U256

type Output = U256

The resulting type after applying the * operator.

fn mul(self, other: i64) -> U256

Performs the * operation.

impl Mul<i8> for U256

type Output = U256

The resulting type after applying the * operator.

fn mul(self, other: i8) -> U256

Performs the * operation.

impl Mul<isize> for U256

type Output = U256

The resulting type after applying the * operator.

fn mul(self, other: isize) -> U256

Performs the * operation.

impl Mul<u16> for U256

type Output = U256

The resulting type after applying the * operator.

fn mul(self, other: u16) -> U256

Performs the * operation.

impl Mul<u32> for U256

type Output = U256

The resulting type after applying the * operator.

fn mul(self, other: u32) -> U256

Performs the * operation.

impl Mul<u64> for U256

type Output = U256

The resulting type after applying the * operator.

fn mul(self, other: u64) -> U256

Performs the * operation.

impl Mul<u8> for U256

type Output = U256

The resulting type after applying the * operator.

fn mul(self, other: u8) -> U256

Performs the * operation.

impl Mul<usize> for U256

type Output = U256

The resulting type after applying the * operator.

fn mul(self, other: usize) -> U256

Performs the * operation.

impl Mul for U256

type Output = U256

The resulting type after applying the * operator.

fn mul(self, other: U256) -> U256

Performs the * operation.

impl MulAssign<i16> for U256

fn mul_assign(&mut self, other: i16)

Performs the *= operation.

impl MulAssign<i32> for U256

fn mul_assign(&mut self, other: i32)

Performs the *= operation.

impl MulAssign<i64> for U256

fn mul_assign(&mut self, other: i64)

Performs the *= operation.

impl MulAssign<i8> for U256

fn mul_assign(&mut self, other: i8)

Performs the *= operation.

impl MulAssign<isize> for U256

fn mul_assign(&mut self, other: isize)

Performs the *= operation.

impl MulAssign<u16> for U256

fn mul_assign(&mut self, other: u16)

Performs the *= operation.

impl MulAssign<u32> for U256

fn mul_assign(&mut self, other: u32)

Performs the *= operation.

impl MulAssign<u64> for U256

fn mul_assign(&mut self, other: u64)

Performs the *= operation.

impl MulAssign<u8> for U256

fn mul_assign(&mut self, other: u8)

Performs the *= operation.

impl MulAssign<usize> for U256

fn mul_assign(&mut self, other: usize)

Performs the *= operation.

impl MulAssign for U256

fn mul_assign(&mut self, other: U256)

Performs the *= operation.

impl Not for U256

type Output = U256

The resulting type after applying the ! operator.

fn not(self) -> U256

Performs the unary ! operation.

impl Num for U256

type FromStrRadixErr = FromStrRadixErr

fn from_str_radix( txt: &str, radix: u32, ) -> Result<U256, <U256 as Num>::FromStrRadixErr>

Convert from a string and radix (typically 2..=36).

impl One for U256

fn one() -> U256

Returns the multiplicative identity element of Self, 1.

fn set_one(&mut self)

Sets self to the multiplicative identity element of Self, 1.

fn is_one(&self) -> bool

where Self: PartialEq,

Returns true if self is equal to the multiplicative identity.

impl Ord for U256

fn cmp(&self, other: &U256) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for U256

fn eq(&self, other: &U256) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for U256

fn partial_cmp(&self, other: &U256) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl<T> Rem<T> for U256

where T: Into<U256> + Copy,

type Output = U256

The resulting type after applying the % operator.

fn rem(self, other: T) -> U256

Performs the % operation.

impl<T> RemAssign<T> for U256

where T: Into<U256> + Copy,

fn rem_assign(&mut self, other: T)

Performs the %= operation.

impl Serialize for U256

fn serialize<S>( &self, serializer: S, ) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error>

where S: Serializer,

Serialize this value into the given Serde serializer.

impl<T> Shl<T> for U256

where T: Into<U256>,

type Output = U256

The resulting type after applying the << operator.

fn shl(self, shift: T) -> U256

Performs the << operation.

impl<T> ShlAssign<T> for U256

where T: Into<U256>,

fn shl_assign(&mut self, shift: T)

Performs the <<= operation.

impl<T> Shr<T> for U256

where T: Into<U256>,

type Output = U256

The resulting type after applying the >> operator.

fn shr(self, shift: T) -> U256

Performs the >> operation.

impl<T> ShrAssign<T> for U256

where T: Into<U256>,

fn shr_assign(&mut self, shift: T)

Performs the >>= operation.

impl<T> Sub<T> for U256

where T: Into<U256>,

type Output = U256

The resulting type after applying the - operator.

fn sub(self, other: T) -> U256

Performs the - operation.

impl SubAssign for U256

fn sub_assign(&mut self, other: U256)

Performs the -= operation.

impl<'a> TryFrom<&'a U512> for U256

type Error = Error

The type returned in the event of a conversion error.

fn try_from(value: &'a U512) -> Result<U256, Error>

Performs the conversion.

impl TryFrom<U512> for U256

type Error = Error

The type returned in the event of a conversion error.

fn try_from(value: U512) -> Result<U256, Error>

Performs the conversion.

impl TypeInfo for U256

type Identity = U256

The type identifying for which type info is provided.

fn type_info() -> Type

Returns the static type identifier for Self.

impl UpperHex for U256

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Zero for U256

fn zero() -> U256

Returns the additive identity element of Self, 0.

fn is_zero(&self) -> bool

Returns true if self is equal to the additive identity.

fn set_zero(&mut self)

Sets self to the additive identity element of Self, 0.

impl Copy for U256

impl EncodeLike for U256

impl Eq for U256

impl StructuralPartialEq for U256

impl Unsigned for U256