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Companion for #6076 (Allow fee calculation to happen off-chain) (#1111)

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* Switch from Convert to WeightToFeePolynomial

* Bump

Co-authored-by: Gav Wood <gavin@parity.io>
This commit is contained in:
Alexander Theißen
2020-05-21 13:47:55 +02:00
committed by GitHub
parent 162baa62fb
commit b6829b6d21
10 changed files with 214 additions and 162 deletions
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polkadot/Cargo.lock
Generated
+137 -131
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File diff suppressed because it is too large Load Diff
polkadot/runtime/kusama/Cargo.toml
+1
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@@ -13,6 +13,7 @@ rustc-hex = { version = "2.0.1", default-features = false }
serde = { version = "1.0.102", default-features = false }
serde_derive = { version = "1.0.102", optional = true }
static_assertions = "1.1.0"
smallvec = "1.4.0"
authority-discovery-primitives = { package = "sp-authority-discovery", git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
babe-primitives = { package = "sp-consensus-babe", git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
polkadot/runtime/kusama/src/constants.rs
+20 -8
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@@ -52,9 +52,11 @@ pub mod time {
pub mod fee {
pub use sp_runtime::Perbill;
use primitives::Balance;
use frame_support::weights::Weight;
use sp_runtime::traits::Convert;
use runtime_common::ExtrinsicBaseWeight;
use frame_support::weights::{
WeightToFeePolynomial, WeightToFeeCoefficient, WeightToFeeCoefficients,
};
use smallvec::smallvec;
/// The block saturation level. Fees will be updates based on this value.
pub const TARGET_BLOCK_FULLNESS: Perbill = Perbill::from_percent(25);
@@ -70,17 +72,25 @@ pub mod fee {
/// - Setting it to `0` will essentially disable the weight fee.
/// - Setting it to `1` will cause the literal `#[weight = x]` values to be charged.
pub struct WeightToFee;
impl Convert<Weight, Balance> for WeightToFee {
fn convert(x: Weight) -> Balance {
impl WeightToFeePolynomial for WeightToFee {
type Balance = Balance;
fn polynomial() -> WeightToFeeCoefficients<Self::Balance> {
// in Kusama, extrinsic base weight (smallest non-zero weight) is mapped to 1/10 CENT:
Balance::from(x).saturating_mul(super::currency::CENTS / 10) / Balance::from(ExtrinsicBaseWeight::get())
let p = super::currency::CENTS;
let q = 10 * Balance::from(ExtrinsicBaseWeight::get());
smallvec![WeightToFeeCoefficient {
degree: 1,
negative: false,
coeff_frac: Perbill::from_rational_approximation(p % q, q),
coeff_integer: p / q,
}]
}
}
}
#[cfg(test)]
mod tests {
use sp_runtime::traits::Convert;
use frame_support::weights::WeightToFeePolynomial;
use runtime_common::{MaximumBlockWeight, ExtrinsicBaseWeight};
use super::fee::WeightToFee;
use super::currency::{CENTS, DOLLARS};
@@ -89,13 +99,15 @@ mod tests {
// This function tests that the fee for `MaximumBlockWeight` of weight is correct
fn full_block_fee_is_correct() {
// A full block should cost 16 DOLLARS
assert_eq!(WeightToFee::convert(MaximumBlockWeight::get()), 16 * DOLLARS)
println!("Base: {}", ExtrinsicBaseWeight::get());
assert_eq!(WeightToFee::calc(&MaximumBlockWeight::get()), 16 * DOLLARS)
}
#[test]
// This function tests that the fee for `ExtrinsicBaseWeight` of weight is correct
fn extrinsic_base_fee_is_correct() {
// `ExtrinsicBaseWeight` should cost 1/10 of a CENT
assert_eq!(WeightToFee::convert(ExtrinsicBaseWeight::get()), CENTS / 10)
println!("Base: {}", ExtrinsicBaseWeight::get());
assert_eq!(WeightToFee::calc(&ExtrinsicBaseWeight::get()), CENTS / 10)
}
}
polkadot/runtime/kusama/src/lib.rs
+1 -1
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@@ -389,7 +389,7 @@ impl collective::Trait<CouncilCollective> for Runtime {
type MaxProposals = CouncilMaxProposals;
}
const DESIRED_MEMBERS: u32 = 13;
const DESIRED_MEMBERS: u32 = 17;
parameter_types! {
pub const CandidacyBond: Balance = 1 * DOLLARS;
pub const VotingBond: Balance = 5 * CENTS;
polkadot/runtime/polkadot/Cargo.toml
+1
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@@ -13,6 +13,7 @@ rustc-hex = { version = "2.0.1", default-features = false }
serde = { version = "1.0.102", default-features = false }
serde_derive = { version = "1.0.102", optional = true }
static_assertions = "1.1.0"
smallvec = "1.4.0"
authority-discovery-primitives = { package = "sp-authority-discovery", git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
babe-primitives = { package = "sp-consensus-babe", git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
polkadot/runtime/polkadot/src/constants.rs
+18 -8
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@@ -44,9 +44,11 @@ pub mod time {
pub mod fee {
pub use sp_runtime::Perbill;
use primitives::Balance;
use frame_support::weights::Weight;
use sp_runtime::traits::Convert;
use runtime_common::ExtrinsicBaseWeight;
use frame_support::weights::{
WeightToFeePolynomial, WeightToFeeCoefficient, WeightToFeeCoefficients,
};
use smallvec::smallvec;
/// The block saturation level. Fees will be updates based on this value.
pub const TARGET_BLOCK_FULLNESS: Perbill = Perbill::from_percent(25);
@@ -62,32 +64,40 @@ pub mod fee {
/// - Setting it to `0` will essentially disable the weight fee.
/// - Setting it to `1` will cause the literal `#[weight = x]` values to be charged.
pub struct WeightToFee;
impl Convert<Weight, Balance> for WeightToFee {
fn convert(x: Weight) -> Balance {
impl WeightToFeePolynomial for WeightToFee {
type Balance = Balance;
fn polynomial() -> WeightToFeeCoefficients<Self::Balance> {
// in Polkadot, extrinsic base weight (smallest non-zero weight) is mapped to 1/10 CENT:
Balance::from(x).saturating_mul(super::currency::CENTS / 10) / Balance::from(ExtrinsicBaseWeight::get())
let p = super::currency::CENTS;
let q = 10 * Balance::from(ExtrinsicBaseWeight::get());
smallvec![WeightToFeeCoefficient {
degree: 1,
negative: false,
coeff_frac: Perbill::from_rational_approximation(p % q, q),
coeff_integer: p / q,
}]
}
}
}
#[cfg(test)]
mod tests {
use sp_runtime::traits::Convert;
use runtime_common::{MaximumBlockWeight, ExtrinsicBaseWeight};
use super::fee::WeightToFee;
use super::currency::{CENTS, DOLLARS};
use frame_support::weights::WeightToFeePolynomial;
#[test]
// This function tests that the fee for `MaximumBlockWeight` of weight is correct
fn full_block_fee_is_correct() {
// A full block should cost 16 DOLLARS
assert_eq!(WeightToFee::convert(MaximumBlockWeight::get()), 16 * DOLLARS)
assert_eq!(WeightToFee::calc(&MaximumBlockWeight::get()), 16 * DOLLARS)
}
#[test]
// This function tests that the fee for `ExtrinsicBaseWeight` of weight is correct
fn extrinsic_base_fee_is_correct() {
// `ExtrinsicBaseWeight` should cost 1/10 of a CENT
assert_eq!(WeightToFee::convert(ExtrinsicBaseWeight::get()), CENTS / 10)
assert_eq!(WeightToFee::calc(&ExtrinsicBaseWeight::get()), CENTS / 10)
}
}
polkadot/runtime/test-runtime/Cargo.toml
+1
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@@ -12,6 +12,7 @@ log = { version = "0.3.9", optional = true }
rustc-hex = { version = "2.0.1", default-features = false }
serde = { version = "1.0.102", default-features = false }
serde_derive = { version = "1.0.102", optional = true }
smallvec = "1.4.0"
babe-primitives = { package = "sp-consensus-babe", git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
sp-api = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
polkadot/runtime/test-runtime/src/constants.rs
+16 -6
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@@ -46,8 +46,11 @@ pub mod time {
pub mod fee {
pub use sp_runtime::Perbill;
use primitives::Balance;
use frame_support::weights::Weight;
use sp_runtime::traits::Convert;
use runtime_common::ExtrinsicBaseWeight;
use frame_support::weights::{
WeightToFeePolynomial, WeightToFeeCoefficient, WeightToFeeCoefficients,
};
use smallvec::smallvec;
/// The block saturation level. Fees will be updates based on this value.
pub const TARGET_BLOCK_FULLNESS: Perbill = Perbill::from_percent(25);
@@ -63,10 +66,17 @@ pub mod fee {
/// - Setting it to `0` will essentially disable the weight fee.
/// - Setting it to `1` will cause the literal `#[weight = x]` values to be charged.
pub struct WeightToFee;
impl Convert<Weight, Balance> for WeightToFee {
fn convert(x: Weight) -> Balance {
// in Kusama a weight of 10_000_000 (smallest non-zero weight) is mapped to 1/10 CENT:
Balance::from(x).saturating_mul(super::currency::CENTS / (10 * 10_000_000))
impl WeightToFeePolynomial for WeightToFee {
type Balance = Balance;
fn polynomial() -> WeightToFeeCoefficients<Self::Balance> {
let p = super::currency::CENTS;
let q = 10 * Balance::from(ExtrinsicBaseWeight::get());
smallvec![WeightToFeeCoefficient {
degree: 1,
negative: false,
coeff_frac: Perbill::from_rational_approximation(p % q, q),
coeff_integer: p / q,
}]
}
}
}
polkadot/runtime/westend/Cargo.toml
+1
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@@ -12,6 +12,7 @@ log = { version = "0.3.9", optional = true }
rustc-hex = { version = "2.0.1", default-features = false }
serde = { version = "1.0.102", default-features = false }
serde_derive = { version = "1.0.102", optional = true }
smallvec = "1.4.0"
authority-discovery-primitives = { package = "sp-authority-discovery", git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
babe-primitives = { package = "sp-consensus-babe", git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
polkadot/runtime/westend/src/constants.rs
+18 -8
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@@ -44,9 +44,11 @@ pub mod time {
pub mod fee {
pub use sp_runtime::Perbill;
use primitives::Balance;
use frame_support::weights::Weight;
use sp_runtime::traits::Convert;
use runtime_common::ExtrinsicBaseWeight;
use frame_support::weights::{
WeightToFeePolynomial, WeightToFeeCoefficient, WeightToFeeCoefficients,
};
use smallvec::smallvec;
/// The block saturation level. Fees will be updates based on this value.
pub const TARGET_BLOCK_FULLNESS: Perbill = Perbill::from_percent(25);
@@ -62,32 +64,40 @@ pub mod fee {
/// - Setting it to `0` will essentially disable the weight fee.
/// - Setting it to `1` will cause the literal `#[weight = x]` values to be charged.
pub struct WeightToFee;
impl Convert<Weight, Balance> for WeightToFee {
fn convert(x: Weight) -> Balance {
impl WeightToFeePolynomial for WeightToFee {
type Balance = Balance;
fn polynomial() -> WeightToFeeCoefficients<Self::Balance> {
// in Westend, extrinsic base weight (smallest non-zero weight) is mapped to 1/10 CENT:
Balance::from(x).saturating_mul(super::currency::CENTS / 10) / Balance::from(ExtrinsicBaseWeight::get())
let p = super::currency::CENTS;
let q = 10 * Balance::from(ExtrinsicBaseWeight::get());
smallvec![WeightToFeeCoefficient {
degree: 1,
negative: false,
coeff_frac: Perbill::from_rational_approximation(p % q, q),
coeff_integer: p / q,
}]
}
}
}
#[cfg(test)]
mod tests {
use sp_runtime::traits::Convert;
use runtime_common::{MaximumBlockWeight, ExtrinsicBaseWeight};
use super::fee::WeightToFee;
use super::currency::{CENTS, DOLLARS};
use frame_support::weights::WeightToFeePolynomial;
#[test]
// This function tests that the fee for `MaximumBlockWeight` of weight is correct
fn full_block_fee_is_correct() {
// A full block should cost 16 DOLLARS
assert_eq!(WeightToFee::convert(MaximumBlockWeight::get()), 16 * DOLLARS)
assert_eq!(WeightToFee::calc(&MaximumBlockWeight::get()), 16 * DOLLARS)
}
#[test]
// This function tests that the fee for `ExtrinsicBaseWeight` of weight is correct
fn extrinsic_base_fee_is_correct() {
// `ExtrinsicBaseWeight` should cost 1/10 of a CENT
assert_eq!(WeightToFee::convert(ExtrinsicBaseWeight::get()), CENTS / 10)
assert_eq!(WeightToFee::calc(&ExtrinsicBaseWeight::get()), CENTS / 10)
}
}