# Struct frame_support::weights::WeightToFeeCoefficient

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

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§

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

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#### 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§

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### impl<Balance> Clone for WeightToFeeCoefficient<Balance>where Balance: Clone,

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

Returns a copy of the value. Read more
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#### fn clone_from(&mut self, source: &Self)

Performs copy-assignment from `source`. Read more
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### impl<Balance> Decode for WeightToFeeCoefficient<Balance>where Balance: Decode,

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#### fn decode<__CodecInputEdqy>( __codec_input_edqy: &mut __CodecInputEdqy ) -> Result<WeightToFeeCoefficient<Balance>, Error>where __CodecInputEdqy: Input,

Attempt to deserialise the value from input.
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#### 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. Read more
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#### fn skip<I>(input: &mut I) -> Result<(), Error>where I: Input,

Attempt to skip the encoded value from input. Read more
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#### fn encoded_fixed_size() -> Option<usize>

Returns the fixed encoded size of the type. Read more
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### impl<Balance> Encode for WeightToFeeCoefficient<Balance>where Balance: Encode,

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#### fn size_hint(&self) -> usize

If possible give a hint of expected size of the encoding. Read more
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#### fn encode_to<__CodecOutputEdqy>( &self, __codec_dest_edqy: &mut __CodecOutputEdqy )where __CodecOutputEdqy: Output + ?Sized,

Convert self to a slice and append it to the destination.
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#### fn encode(&self) -> Vec<u8> ⓘ

Convert self to an owned vector.
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Convert self to a slice and then invoke the given closure with it.
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#### fn encoded_size(&self) -> usize

Calculates the encoded size. Read more
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### impl<Balance> TypeInfo for WeightToFeeCoefficient<Balance>where Balance: TypeInfo + 'static,

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#### type Identity = WeightToFeeCoefficient<Balance>

The type identifying for which type info is provided. Read more
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#### fn type_info() -> Type

Returns the static type identifier for `Self`.
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