timechain_runtime::configs::tokenomics

Struct WeightToFee

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pub struct WeightToFee;
Expand description

Handles converting a weight scalar to a fee value, based on the scale and granularity of the node’s balance type.

This should typically create a mapping between the following ranges:

  • [0, frame_system::MaximumBlockWeight]
  • [Balance::min, Balance::max]

Yet, it can be used for any other sort of change to weight-fee. Some examples being:

  • Setting it to 0 will essentially disable the weight fee.
  • Setting it to 1 will cause the literal #[weight = x] values to be charged.

Trait Implementations§

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impl WeightToFeePolynomial for WeightToFee

By introducing a second-degree term, the fee will grow faster as the weight increases. This can be useful for discouraging transactions that consume excessive resources. While a first-degree polynomial gives a linear fee increase, adding a quadratic term will make fees grow non-linearly, meaning larger weights result in disproportionately larger fees. This change can help manage network congestion by making resource-heavy operations more expensive.

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type Balance = u128

The type that is returned as result from polynomial evaluation.
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fn polynomial() -> WeightToFeeCoefficients<Self::Balance>

Returns a polynomial that describes the weight to fee conversion. Read more

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fn weight_to_fee(weight: &Weight) -> <T as WeightToFee>::Balance

Calculates the fee from the passed weight according to the polynomial.

This should not be overridden in most circumstances. Calculation is done in the Balance type and never overflows. All evaluation is saturating.

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type Balance = <T as WeightToFeePolynomial>::Balance

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