git.delta.rocks / unique-network / refs/commits / 500168dd283f

1// Copyright 2019-2022 Unique Network (Gibraltar) Ltd.2// This file is part of Unique Network.34// Unique Network is free software: you can redistribute it and/or modify5// it under the terms of the GNU General Public License as published by6// the Free Software Foundation, either version 3 of the License, or7// (at your option) any later version.89// Unique Network is distributed in the hope that it will be useful,10// but WITHOUT ANY WARRANTY; without even the implied warranty of11// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the12// GNU General Public License for more details.1314// You should have received a copy of the GNU General Public License15// along with Unique Network. If not, see <http://www.gnu.org/licenses/>.1617#![cfg(test)]18#![allow(clippy::from_over_into)]19use crate as pallet_inflation;2021use frame_support::{22	assert_ok, parameter_types,23	traits::{Currency, OnInitialize, Everything, ConstU32},24	weights::Weight,25};26use frame_system::RawOrigin;27use sp_core::H256;28use sp_runtime::{29	traits::{BlakeTwo256, BlockNumberProvider, IdentityLookup},30	testing::Header,31};3233type UncheckedExtrinsic = frame_system::mocking::MockUncheckedExtrinsic<Test>;34type Block = frame_system::mocking::MockBlock<Test>;3536const YEAR: u64 = 5_259_600; // 6-second blocks37							 // const YEAR: u64 = 2_629_800; // 12-second blocks38							 // Expected 100-block inflation for year 1 is 100 * 100_000_000 / YEAR = FIRST_YEAR_BLOCK_INFLATION39const FIRST_YEAR_BLOCK_INFLATION: u64 = 1901;4041parameter_types! {42	pub const ExistentialDeposit: u64 = 1;43	pub const MaxLocks: u32 = 50;44}4546impl pallet_balances::Config for Test {47	type AccountStore = System;48	type Balance = u64;49	type DustRemoval = ();50	type RuntimeEvent = ();51	type ExistentialDeposit = ExistentialDeposit;52	type WeightInfo = ();53	type MaxLocks = MaxLocks;54	type MaxReserves = ();55	type ReserveIdentifier = ();56}5758frame_support::construct_runtime!(59	pub enum Test where60		Block = Block,61		NodeBlock = Block,62		UncheckedExtrinsic = UncheckedExtrinsic,63	{64		Balances: pallet_balances::{Pallet, Call, Storage},65		System: frame_system::{Pallet, Call, Config, Storage, Event<T>},66		Inflation: pallet_inflation::{Pallet, Call, Storage},67	}68);6970parameter_types! {71	pub const BlockHashCount: u64 = 250;72	pub BlockWeights: frame_system::limits::BlockWeights =73		frame_system::limits::BlockWeights::simple_max(Weight::from_ref_time(1024));74	pub const SS58Prefix: u8 = 42;75}7677impl frame_system::Config for Test {78	type BaseCallFilter = Everything;79	type BlockWeights = ();80	type BlockLength = ();81	type DbWeight = ();82	type RuntimeOrigin = RuntimeOrigin;83	type RuntimeCall = RuntimeCall;84	type Index = u64;85	type BlockNumber = u64;86	type Hash = H256;87	type Hashing = BlakeTwo256;88	type AccountId = u64;89	type Lookup = IdentityLookup<Self::AccountId>;90	type Header = Header;91	type RuntimeEvent = ();92	type BlockHashCount = BlockHashCount;93	type Version = ();94	type PalletInfo = PalletInfo;95	type AccountData = pallet_balances::AccountData<u64>;96	type OnNewAccount = ();97	type OnKilledAccount = ();98	type SystemWeightInfo = ();99	type SS58Prefix = SS58Prefix;100	type OnSetCode = ();101	type MaxConsumers = ConstU32<16>;102}103104parameter_types! {105	pub TreasuryAccountId: u64 = 1234;106	pub const InflationBlockInterval: u32 = 100; // every time per how many blocks inflation is applied107	pub static MockBlockNumberProvider: u64 = 0;108}109110impl BlockNumberProvider for MockBlockNumberProvider {111	type BlockNumber = u64;112113	fn current_block_number() -> Self::BlockNumber {114		Self::get()115	}116}117118impl pallet_inflation::Config for Test {119	type Currency = Balances;120	type TreasuryAccountId = TreasuryAccountId;121	type InflationBlockInterval = InflationBlockInterval;122	type BlockNumberProvider = MockBlockNumberProvider;123}124125pub fn new_test_ext() -> sp_io::TestExternalities {126	frame_system::GenesisConfig::default()127		.build_storage::<Test>()128		.unwrap()129		.into()130}131132macro_rules! block_inflation {133	// Block inflation doesn't have any argumets134	() => {135		// Return BlockInflation state variable current value136		<pallet_inflation::BlockInflation<Test>>::get()137	};138}139140#[test]141fn uninitialized_inflation() {142	new_test_ext().execute_with(|| {143		let initial_issuance: u64 = 1_000_000_000;144		let _ = <Balances as Currency<_>>::deposit_creating(&1234, initial_issuance);145		assert_eq!(Balances::free_balance(1234), initial_issuance);146147		// BlockInflation should be set after inflation is started148		// first inflation deposit should be equal to BlockInflation149		MockBlockNumberProvider::set(1);150151		assert_eq!(block_inflation!(), 0);152	});153}154155#[test]156fn inflation_works() {157	new_test_ext().execute_with(|| {158		// Total issuance = 1_000_000_000159		let initial_issuance: u64 = 1_000_000_000;160		let _ = <Balances as Currency<_>>::deposit_creating(&1234, initial_issuance);161		assert_eq!(Balances::free_balance(1234), initial_issuance);162163		// BlockInflation should be set after inflation is started164		// first inflation deposit should be equal to BlockInflation165		MockBlockNumberProvider::set(1);166167		// Start inflation as sudo168		assert_ok!(Inflation::start_inflation(RawOrigin::Root.into(), 1));169		assert_eq!(block_inflation!(), FIRST_YEAR_BLOCK_INFLATION);170		assert_eq!(171			Balances::free_balance(1234) - initial_issuance,172			block_inflation!()173		);174175		// Trigger inflation176		MockBlockNumberProvider::set(102);177		Inflation::on_initialize(0);178		assert_eq!(179			Balances::free_balance(1234) - initial_issuance,180			2 * block_inflation!()181		);182	});183}184185#[test]186fn inflation_second_deposit() {187	new_test_ext().execute_with(|| {188		// Total issuance = 1_000_000_000189		let initial_issuance: u64 = 1_000_000_000;190		let _ = <Balances as Currency<_>>::deposit_creating(&1234, initial_issuance);191		assert_eq!(Balances::free_balance(1234), initial_issuance);192		MockBlockNumberProvider::set(1);193194		// Start inflation as sudo195		assert_ok!(Inflation::start_inflation(RawOrigin::Root.into(), 1));196197		// Next inflation deposit happens when block is greater then or equal to NextInflationBlock198		let mut block: u64 = 2;199		let balance_before: u64 = Balances::free_balance(1234);200		while block < <pallet_inflation::NextInflationBlock<Test>>::get() {201			MockBlockNumberProvider::set(block as u64);202			Inflation::on_initialize(0);203			block += 1;204		}205		let balance_just_before: u64 = Balances::free_balance(1234);206		assert_eq!(balance_before, balance_just_before);207208		// The block with inflation209		MockBlockNumberProvider::set(block as u64);210		Inflation::on_initialize(0);211		let balance_after: u64 = Balances::free_balance(1234);212		assert_eq!(balance_after - balance_just_before, block_inflation!());213	});214}215216#[test]217fn inflation_in_1_year() {218	new_test_ext().execute_with(|| {219		// Total issuance = 1_000_000_000220		let initial_issuance: u64 = 1_000_000_000;221		let _ = <Balances as Currency<_>>::deposit_creating(&1234, initial_issuance);222		assert_eq!(Balances::free_balance(1234), initial_issuance);223		MockBlockNumberProvider::set(1);224225		// Start inflation as sudo226		assert_ok!(Inflation::start_inflation(RawOrigin::Root.into(), 1));227228		// Go through all the block inflations for year 1,229		// total issuance will be updated accordingly230		// Inflation is set to start in block 1, so first iteration is block 101231		for block in (101..YEAR).step_by(100) {232			MockBlockNumberProvider::set(block);233			Inflation::on_initialize(0);234		}235		assert_eq!(236			initial_issuance + (FIRST_YEAR_BLOCK_INFLATION * (YEAR / 100)),237			<Balances as Currency<_>>::total_issuance()238		);239240		MockBlockNumberProvider::set(YEAR + 1);241		Inflation::on_initialize(0);242		let block_inflation_year_2 = block_inflation!();243		// Expected 100-block inflation for year 2: 100 * 9.33% * initial issuance * 110% / YEAR == 1951244		let expecter_year_2_inflation: u64 = (initial_issuance245			+ FIRST_YEAR_BLOCK_INFLATION * YEAR / 100)246			* 933 * 100 / (10000 * YEAR);247		assert_eq!(block_inflation_year_2 / 10, expecter_year_2_inflation / 10); // divide by 10 for approx. equality248	});249}250251#[test]252fn inflation_start_large_kusama_block() {253	new_test_ext().execute_with(|| {254		// Total issuance = 1_000_000_000255		let initial_issuance: u64 = 1_000_000_000;256		let start_block: u64 = 10457457;257		let _ = <Balances as Currency<_>>::deposit_creating(&1234, initial_issuance);258		assert_eq!(Balances::free_balance(1234), initial_issuance);259		MockBlockNumberProvider::set(start_block);260261		// Start inflation as sudo262		assert_ok!(Inflation::start_inflation(263			RawOrigin::Root.into(),264			start_block265		));266267		// Go through all the block inflations for year 1,268		// total issuance will be updated accordingly269		// Inflation is set to start in block 1, so first iteration is block 101270		for block in (101..YEAR).step_by(100) {271			MockBlockNumberProvider::set(start_block + block);272			Inflation::on_initialize(0);273		}274		assert_eq!(275			initial_issuance + (FIRST_YEAR_BLOCK_INFLATION * (YEAR / 100)),276			<Balances as Currency<_>>::total_issuance()277		);278279		MockBlockNumberProvider::set(start_block + YEAR + 1);280		Inflation::on_initialize(0);281		let block_inflation_year_2 = block_inflation!();282		// Expected 100-block inflation for year 2: 100 * 9.33% * initial issuance * 110% / YEAR == 1951283		let expecter_year_2_inflation: u64 = (initial_issuance284			+ FIRST_YEAR_BLOCK_INFLATION * YEAR / 100)285			* 933 * 100 / (10000 * YEAR);286		assert_eq!(block_inflation_year_2 / 10, expecter_year_2_inflation / 10); // divide by 10 for approx. equality287	});288}289290#[test]291fn inflation_after_year_10_is_flat() {292	new_test_ext().execute_with(|| {293		// Total issuance = 1_000_000_000294		let initial_issuance: u64 = 1_000_000_000;295		let _ = <Balances as Currency<_>>::deposit_creating(&1234, initial_issuance);296		assert_eq!(Balances::free_balance(1234), initial_issuance);297		MockBlockNumberProvider::set(YEAR * 9 + 1);298299		// Start inflation as sudo300		assert_ok!(Inflation::start_inflation(RawOrigin::Root.into(), 1));301302		// Let inflation catch up303		for _year in 1..=9 {304			Inflation::on_initialize(0);305		}306307		for year in 10..=20 {308			let block_inflation_year_before = block_inflation!();309			MockBlockNumberProvider::set(YEAR * year + 1);310			Inflation::on_initialize(0);311			let block_inflation_year_after = block_inflation!();312313			// Assert that next year inflation is equal to previous year inflation314			assert_eq!(block_inflation_year_before, block_inflation_year_after);315		}316	});317}318319#[test]320fn inflation_rate_by_year() {321	new_test_ext().execute_with(|| {322		let payouts: u64 = YEAR / InflationBlockInterval::get() as u64;323324		// Inflation starts at 10% and does down by 2/3% every year until year 9 (included),325		// then it is flat.326		let payout_by_year: [u64; 11] = [1000, 933, 867, 800, 733, 667, 600, 533, 467, 400, 400];327328		// For accuracy total issuance = payout0 * payouts * 10;329		let initial_issuance: u64 = payout_by_year[0] * payouts * 10;330		let _ = <Balances as Currency<_>>::deposit_creating(&1234, initial_issuance);331		assert_eq!(Balances::free_balance(1234), initial_issuance);332333		// Start inflation as sudo334		assert_ok!(Inflation::start_inflation(RawOrigin::Root.into(), 1));335336		for year in 0..=10 {337			// Year first block338			MockBlockNumberProvider::set(YEAR * year + 1);339			Inflation::on_initialize(0);340			let mut actual_payout = block_inflation!();341			assert_eq!(actual_payout, payout_by_year[year as usize]);342343			// Year second block344			MockBlockNumberProvider::set(YEAR * year + 2);345			Inflation::on_initialize(0);346			actual_payout = block_inflation!();347			assert_eq!(actual_payout, payout_by_year[year as usize]);348349			// Year middle block350			MockBlockNumberProvider::set(year * YEAR + YEAR / 2);351			Inflation::on_initialize(0);352			actual_payout = block_inflation!();353			assert_eq!(actual_payout, payout_by_year[year as usize]);354355			// Year last block356			MockBlockNumberProvider::set((year + 1) * YEAR);357			Inflation::on_initialize(0);358			actual_payout = block_inflation!();359			assert_eq!(actual_payout, payout_by_year[year as usize]);360		}361	});362}