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Apply WeightToFeePolynomials to pallet_transaction_payment's length fee (#10785)

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* Apply WeightToFeePolynomials to length fee

* Remove TransactionByteFee

* Add test cases for ConstantModifierFee

* Restore import

* Use pallet::constant_name

* Remove irrelevant TODO comment

* Update frame/support/src/weights.rs

* Update frame/transaction-payment/src/lib.rs

* Update frame/transaction-payment/src/lib.rs

* Update frame/transaction-payment/src/lib.rs

Co-authored-by: Kian Paimani <5588131+kianenigma@users.noreply.github.com>

* s/ConstantModifierFee/ConstantMultiplier/

* Impl LengthToFee for test configs

* fmt

* Remove unused import

* Impl WeightToFeePolynomial for byte fee in ExtBuilder

* Remove unused import

* fix doc

Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>
Co-authored-by: Kian Paimani <5588131+kianenigma@users.noreply.github.com>
Co-authored-by: Shawn Tabrizi <shawntabrizi@gmail.com>
This commit is contained in:
Stephen Shelton
2022-04-07 11:24:59 +00:00
committed by GitHub
parent b438b47f1a
commit ca1261ee21
10 changed files with 85 additions and 33 deletions
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substrate/frame/support/src/weights.rs
+41 -1
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@@ -132,7 +132,10 @@ mod extrinsic_weights;
mod paritydb_weights;
mod rocksdb_weights;
use crate::dispatch::{DispatchError, DispatchErrorWithPostInfo, DispatchResultWithPostInfo};
use crate::{
dispatch::{DispatchError, DispatchErrorWithPostInfo, DispatchResultWithPostInfo},
traits::Get,
};
use codec::{Decode, Encode};
use scale_info::TypeInfo;
#[cfg(feature = "std")]
@@ -709,6 +712,34 @@ where
}
}
/// Implementor of [`WeightToFeePolynomial`] that uses a constant multiplier.
/// # Example
///
/// ```
/// # use frame_support::traits::ConstU128;
/// # use frame_support::weights::ConstantMultiplier;
/// // Results in a multiplier of 10 for each unit of weight (or length)
/// type LengthToFee = ConstantMultiplier::<u128, ConstU128<10u128>>;
/// ```
pub struct ConstantMultiplier<T, M>(sp_std::marker::PhantomData<(T, M)>);
impl<T, M> WeightToFeePolynomial for ConstantMultiplier<T, M>
where
T: BaseArithmetic + From<u32> + Copy + Unsigned,
M: Get<T>,
{
type Balance = T;
fn polynomial() -> WeightToFeeCoefficients<Self::Balance> {
smallvec!(WeightToFeeCoefficient {
coeff_integer: M::get(),
coeff_frac: Perbill::zero(),
negative: false,
degree: 1,
})
}
}
/// A struct holding value for each `DispatchClass`.
#[derive(Clone, Eq, PartialEq, Default, RuntimeDebug, Encode, Decode, TypeInfo)]
pub struct PerDispatchClass<T> {
@@ -983,4 +1014,13 @@ mod tests {
assert_eq!(IdentityFee::<Balance>::calc(&50), 50);
assert_eq!(IdentityFee::<Balance>::calc(&Weight::max_value()), Balance::max_value());
}
#[test]
fn constant_fee_works() {
use crate::traits::ConstU128;
assert_eq!(ConstantMultiplier::<u128, ConstU128<100u128>>::calc(&0), 0);
assert_eq!(ConstantMultiplier::<u128, ConstU128<10u128>>::calc(&50), 500);
assert_eq!(ConstantMultiplier::<u128, ConstU128<1024u128>>::calc(&16), 16384);
assert_eq!(ConstantMultiplier::<u128, ConstU128<{ u128::MAX }>>::calc(&2), u128::MAX);
}
}