Struct GasAllowanceCounter 

pub struct GasAllowanceCounter(/* private fields */);

Gas allowance counter with some predefined maximum value.

Implementations

impl GasAllowanceCounter

pub fn new(initial_amount: u64) -> Self

New limited gas allowance counter with initial value to spend.

pub fn left(&self) -> u64

Report how much gas allowance is left.

pub fn charge<T: Into<u64>>(&mut self, amount: T) -> ChargeResult

Account for used gas allowance.

If there is no enough gas, then makes saturating charge and returns NotEnough. Else charges gas and returns Enough.

pub fn charge_if_enough<T: Into<u64>>(&mut self, amount: T) -> ChargeResult

Account for used gas allowance.

If there is no enough gas, then does nothing and returns ChargeResult::NotEnough. Else charges gas and returns ChargeResult::Enough.

pub unsafe fn clone(&self) -> Self

Clone the counter

Safety

Use only when it’s absolutely necessary to clone the counter i.e atomic implementation of Ext.

Trait Implementations

impl Clone for GasAllowanceCounter

fn clone(&self) -> GasAllowanceCounter

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for GasAllowanceCounter

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

Formats the value using the given formatter.

impl Decode for GasAllowanceCounter

fn decode<__CodecInputEdqy: Input>( __codec_input_edqy: &mut __CodecInputEdqy, ) -> Result<Self, Error>

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 Encode for GasAllowanceCounter

fn size_hint(&self) -> usize

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

fn encode_to<__CodecOutputEdqy: Output + ?Sized>( &self, __codec_dest_edqy: &mut __CodecOutputEdqy, )

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

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

Convert self to an owned vector.

fn using_encoded<__CodecOutputReturn, __CodecUsingEncodedCallback: FnOnce(&[u8]) -> __CodecOutputReturn>( &self, f: __CodecUsingEncodedCallback, ) -> __CodecOutputReturn

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

fn encoded_size(&self) -> usize

Calculates the encoded size.

impl EncodeLike for GasAllowanceCounter