Struct sp_weights::WeightToFeeCoefficient

pub struct WeightToFeeCoefficient<Balance> {
    pub coeff_integer: Balance,
    pub coeff_frac: Perbill,
    pub negative: bool,
    pub degree: u8,
}

One coefficient and its position in the WeightToFee.

One term of polynomial is calculated as:

coeff_integer * x^(degree) + coeff_frac * x^(degree)

The negative value encodes whether the term is added or subtracted from the overall polynomial result.

Fields

coeff_integer: Balance

The integral part of the coefficient.

coeff_frac: Perbill

The fractional part of the coefficient.

negative: bool

True iff the coefficient should be interpreted as negative.

degree: u8

Degree/exponent of the term.

Implementations

impl<Balance> WeightToFeeCoefficient<Balance>

where Balance: BaseArithmetic + From<u32> + Copy + Unsigned,

pub fn saturating_eval(&self, result: Balance, x: Balance) -> Balance

Evaluate the term at x and saturatingly amalgamate into result.

The unsigned value for the term is calculated as:

(frac * x^(degree) + integer * x^(degree))

Depending on the value of negative, it is added or subtracted from the result.

Trait Implementations

impl<Balance: Clone> Clone for WeightToFeeCoefficient<Balance>

fn clone(&self) -> WeightToFeeCoefficient<Balance>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<Balance> Decode for WeightToFeeCoefficient<Balance>

where Balance: Decode,

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<Balance> Encode for WeightToFeeCoefficient<Balance>

where Balance: Encode,

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<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 encoded_size(&self) -> usize

Calculates the encoded size.

impl<Balance> TypeInfo for WeightToFeeCoefficient<Balance>

where Balance: TypeInfo + 'static,

type Identity = WeightToFeeCoefficient<Balance>

The type identifying for which type info is provided.

fn type_info() -> Type

Returns the static type identifier for Self.

impl<Balance> EncodeLike for WeightToFeeCoefficient<Balance>

where Balance: Encode,