`764552168e27`

1 file changed

modifiedpallets/inflation/src/lib.rsdiff before after both
1//2// This file is subject to the terms and conditions defined in3// file 'LICENSE', which is part of this source code package.4//56#![recursion_limit = "1024"]7#![cfg_attr(not(feature = "std"), no_std)]89#[cfg(feature = "std")]10pub use std::*;1112pub use serde::{Serialize, Deserialize};1314#[cfg(feature = "runtime-benchmarks")]15mod benchmarking;1617#[cfg(test)]18mod tests;1920pub use frame_support::{21	construct_runtime, decl_module, decl_storage, ensure,22	traits::{23		Currency, ExistenceRequirement, Get, Imbalance, KeyOwnerProofSystem, OnUnbalanced,24		Randomness, IsSubType, WithdrawReasons,25	},26	weights::{27		constants::{BlockExecutionWeight, ExtrinsicBaseWeight, RocksDbWeight, WEIGHT_PER_SECOND},28		DispatchInfo, GetDispatchInfo, IdentityFee, Pays, PostDispatchInfo, Weight,29		WeightToFeePolynomial, DispatchClass,30	},31	StorageValue, transactional,32};3334// #[cfg(feature = "runtime-benchmarks")]35pub use frame_support::dispatch::DispatchResult;3637use sp_runtime::{38	Perbill,39	traits::{BlockNumberProvider},40};41use sp_std::convert::TryInto;4243use frame_system::{self as system};4445/// The balance type of this module.46pub type BalanceOf<T> =47	<<T as Config>::Currency as Currency<<T as frame_system::Config>::AccountId>>::Balance;4849pub const YEAR: u32 = 5_259_600; // 6-second block50// pub const YEAR: u32 = 2_629_800; // 12-second block51pub const TOTAL_YEARS_UNTIL_FLAT: u32 = 9;52pub const START_INFLATION_PERCENT: u32 = 10;53pub const END_INFLATION_PERCENT: u32 = 4;5455pub trait Config: system::Config {56	type Currency: Currency<Self::AccountId>;57	type TreasuryAccountId: Get<Self::AccountId>;58	type InflationBlockInterval: Get<Self::BlockNumber>;5960	// The block number provider61	type BlockNumberProvider: BlockNumberProvider<BlockNumber = Self::BlockNumber>;62}6364decl_storage! {65	trait Store for Module<T: Config> as Inflation {66		/// starting year total issuance67		pub StartingYearTotalIssuance get(fn starting_year_total_issuance): BalanceOf<T>;6869		/// Current block inflation70		pub BlockInflation get(fn block_inflation): BalanceOf<T>;7172		/// Next (relay) block when inflation is applied. This value is approximate.73		pub NextInflationBlock get(fn next_inflation_block): T::BlockNumber;7475		/// Next (relay) block when inflation is recalculated. This value is approximate.76		pub NextRecalculationBlock get(fn next_recalculation_block): T::BlockNumber;77	}78}7980decl_module! {81	pub struct Module<T: Config> for enum Call82	where83		origin: T::Origin,84	{85		const InflationBlockInterval: T::BlockNumber = T::InflationBlockInterval::get();8687		fn on_initialize() -> Weight88		{89			let mut consumed_weight = 0;90			let mut add_weight = |reads, writes, weight| {91				consumed_weight += T::DbWeight::get().reads_writes(reads, writes);92				consumed_weight += weight;93			};9495			let block_interval: u32 = T::InflationBlockInterval::get().try_into().unwrap_or(0);96			let _now = T::BlockNumberProvider::current_block_number();97			let next_recalculation: T::BlockNumber = <NextRecalculationBlock<T>>::get();98			let next_inflation: T::BlockNumber = <NextInflationBlock<T>>::get();99			add_weight(2, 0, 5_000_000);100101			// Recalculate inflation on the first block of the year (or if it is not initialized yet)102			if _now >= next_recalculation {103				let current_year: u32 = (next_recalculation / T::BlockNumber::from(YEAR)).try_into().unwrap_or(0);104105				let one_percent = Perbill::from_percent(1);106107				if current_year <= TOTAL_YEARS_UNTIL_FLAT {108					let amount: BalanceOf<T> = Perbill::from_rational(109						block_interval * (START_INFLATION_PERCENT * TOTAL_YEARS_UNTIL_FLAT - current_year * (START_INFLATION_PERCENT - END_INFLATION_PERCENT)),110						YEAR * TOTAL_YEARS_UNTIL_FLAT111					) * ( one_percent * T::Currency::total_issuance() );112					<BlockInflation<T>>::put(amount);113				}114				else {115					let amount: BalanceOf<T> = Perbill::from_rational(116						block_interval * END_INFLATION_PERCENT,117						YEAR118					) * (one_percent * T::Currency::total_issuance());119					<BlockInflation<T>>::put(amount);120				}121				<StartingYearTotalIssuance<T>>::set(T::Currency::total_issuance());122123				// First time deposit124				T::Currency::deposit_creating(&T::TreasuryAccountId::get(), <BlockInflation<T>>::get());125126				// Update recalculation and inflation blocks127				<NextRecalculationBlock<T>>::set(next_recalculation + YEAR.into());128				<NextInflationBlock<T>>::set(next_recalculation + block_interval.into() + YEAR.into());129130				add_weight(7, 8, 28_300_000);131			}132133			// Apply inflation every InflationBlockInterval blocks and in the 1st block to initialize Treasury account134			else if _now >= next_inflation {135				T::Currency::deposit_into_existing(&T::TreasuryAccountId::get(), <BlockInflation<T>>::get()).ok();136137				// Update inflation block138				<NextInflationBlock<T>>::set(next_inflation + block_interval.into());139140				add_weight(3, 3, 12_900_000);141			}142143			consumed_weight144		}145146	}147}