Struct casper_execution_engine::shared::host_function_costs::HostFunction

pub struct HostFunction<T> { /* fields omitted */ }

Representation of a host function cost

Total gas cost is equal to cost + sum of each argument weight multiplied by the byte size of the data.

Implementations

impl<T> HostFunction<T>

pub fn new(cost: Cost, arguments: T) -> Self

pub fn cost(&self) -> Cost

impl<T> HostFunction<T> where
    T: Default, 

pub fn fixed(cost: Cost) -> Self

impl<T> HostFunction<T> where
    T: AsRef<[Cost]>, 

pub fn arguments(&self) -> &[Cost]

pub fn calculate_gas_cost(&self, weights: T) -> Gas

Calculate gas cost for a host function

Trait Implementations

impl<T: Clone> Clone for HostFunction<T>

fn clone(&self) -> HostFunction<T>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<T: Copy> Copy for HostFunction<T>

impl<T> DataSize for HostFunction<T> where
    T: DataSize, 

const IS_DYNAMIC: bool

If true, the type has a heap size that can vary at runtime, depending on the actual value.

const STATIC_HEAP_SIZE: usize

The amount of space a value of the type always occupies. If IS_DYNAMIC is false, this is the total amount of heap memory occupied by the value. Otherwise this is a lower bound.

fn estimate_heap_size(&self) -> usize

Estimates the size of heap memory taken up by this value.

impl<T: Debug> Debug for HostFunction<T>

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

Formats the value using the given formatter.

impl<T> Default for HostFunction<T> where
    T: Default, 

fn default() -> Self

Returns the "default value" for a type.

impl<'de, T> Deserialize<'de> for HostFunction<T> where
    T: Deserialize<'de>, 

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error> where
    __D: Deserializer<'de>, 

Deserialize this value from the given Serde deserializer.

impl<T: Eq> Eq for HostFunction<T>

impl<T> FromBytes for HostFunction<T> where
    T: Default + AsMut<[Cost]>, 

fn from_bytes(bytes: &[u8]) -> Result<(Self, &[u8]), Error>

Deserializes the slice into Self.

pub fn from_vec(
    bytes: Vec<u8, Global>
) -> Result<(Self, Vec<u8, Global>), Error>

Deserializes the Vec<u8> into Self.

impl<T: PartialEq> PartialEq<HostFunction<T>> for HostFunction<T>

fn eq(&self, other: &HostFunction<T>) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &HostFunction<T>) -> bool

This method tests for !=.

impl<T> Serialize for HostFunction<T> where
    T: Serialize, 

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error> where
    __S: Serializer, 

Serialize this value into the given Serde serializer.

impl<T> StructuralEq for HostFunction<T>

impl<T> StructuralPartialEq for HostFunction<T>

impl<T> ToBytes for HostFunction<T> where
    T: AsRef<[Cost]>, 

fn to_bytes(&self) -> Result<Vec<u8>, Error>

Serializes &self to a Vec<u8>.

fn serialized_length(&self) -> usize

Returns the length of the Vec<u8> which would be returned from a successful call to to_bytes() or into_bytes(). The data is not actually serialized, so this call is relatively cheap.

pub fn into_bytes(self) -> Result<Vec<u8, Global>, Error>

Consumes self and serializes to a Vec<u8>.