git.delta.rocks / unique-network / refs/commits / 7fc3eecfe610

1#![cfg(test)]2#![allow(clippy::from_over_into)]3use crate as pallet_inflation;45use frame_support::{6	assert_ok, parameter_types,7	traits::{Currency, OnInitialize, Everything},8};9use frame_system::RawOrigin;10use sp_core::H256;11use sp_runtime::{12	traits::{BlakeTwo256, BlockNumberProvider, IdentityLookup},13	testing::Header,14};1516type UncheckedExtrinsic = frame_system::mocking::MockUncheckedExtrinsic<Test>;17type Block = frame_system::mocking::MockBlock<Test>;1819const YEAR: u64 = 5_259_600; // 6-second blocks20							 // const YEAR: u64 = 2_629_800; // 12-second blocks21							 // Expected 100-block inflation for year 1 is 100 * 100_000_000 / YEAR = FIRST_YEAR_BLOCK_INFLATION22const FIRST_YEAR_BLOCK_INFLATION: u64 = 1901;2324parameter_types! {25	pub const ExistentialDeposit: u64 = 1;26	pub const MaxLocks: u32 = 50;27}2829impl pallet_balances::Config for Test {30	type AccountStore = System;31	type Balance = u64;32	type DustRemoval = ();33	type Event = ();34	type ExistentialDeposit = ExistentialDeposit;35	type WeightInfo = ();36	type MaxLocks = MaxLocks;37	type MaxReserves = ();38	type ReserveIdentifier = ();39}4041frame_support::construct_runtime!(42	pub enum Test where43		Block = Block,44		NodeBlock = Block,45		UncheckedExtrinsic = UncheckedExtrinsic,46	{47		Balances: pallet_balances::{Pallet, Call, Storage},48		System: frame_system::{Pallet, Call, Config, Storage, Event<T>},49		Inflation: pallet_inflation::{Pallet, Call, Storage},50	}51);5253parameter_types! {54	pub const BlockHashCount: u64 = 250;55	pub BlockWeights: frame_system::limits::BlockWeights =56		frame_system::limits::BlockWeights::simple_max(1024);57	pub const SS58Prefix: u8 = 42;58}5960impl frame_system::Config for Test {61	type BaseCallFilter = Everything;62	type BlockWeights = ();63	type BlockLength = ();64	type DbWeight = ();65	type Origin = Origin;66	type Call = Call;67	type Index = u64;68	type BlockNumber = u64;69	type Hash = H256;70	type Hashing = BlakeTwo256;71	type AccountId = u64;72	type Lookup = IdentityLookup<Self::AccountId>;73	type Header = Header;74	type Event = ();75	type BlockHashCount = BlockHashCount;76	type Version = ();77	type PalletInfo = PalletInfo;78	type AccountData = pallet_balances::AccountData<u64>;79	type OnNewAccount = ();80	type OnKilledAccount = ();81	type SystemWeightInfo = ();82	type SS58Prefix = SS58Prefix;83	type OnSetCode = ();84}8586parameter_types! {87	pub TreasuryAccountId: u64 = 1234;88	pub const InflationBlockInterval: u32 = 100; // every time per how many blocks inflation is applied89	pub static MockBlockNumberProvider: u64 = 0;90}9192impl BlockNumberProvider for MockBlockNumberProvider {93	type BlockNumber = u64;9495	fn current_block_number() -> Self::BlockNumber {96		Self::get()97	}98}99100impl pallet_inflation::Config for Test {101	type Currency = Balances;102	type TreasuryAccountId = TreasuryAccountId;103	type InflationBlockInterval = InflationBlockInterval;104	type BlockNumberProvider = MockBlockNumberProvider;105}106107pub fn new_test_ext() -> sp_io::TestExternalities {108	frame_system::GenesisConfig::default()109		.build_storage::<Test>()110		.unwrap()111		.into()112}113114macro_rules! block_inflation {115	// Block inflation doesn't have any argumets116	() => {117		// Return BlockInflation state variable current value118		<pallet_inflation::BlockInflation<Test>>::get()119	};120}121122#[test]123fn uninitialized_inflation() {124	new_test_ext().execute_with(|| {125		let initial_issuance: u64 = 1_000_000_000;126		let _ = <Balances as Currency<_>>::deposit_creating(&1234, initial_issuance);127		assert_eq!(Balances::free_balance(1234), initial_issuance);128129		// BlockInflation should be set after inflation is started130		// first inflation deposit should be equal to BlockInflation131		MockBlockNumberProvider::set(1);132133		assert_eq!(block_inflation!(), 0);134	});135}136137#[test]138fn inflation_works() {139	new_test_ext().execute_with(|| {140		// Total issuance = 1_000_000_000141		let initial_issuance: u64 = 1_000_000_000;142		let _ = <Balances as Currency<_>>::deposit_creating(&1234, initial_issuance);143		assert_eq!(Balances::free_balance(1234), initial_issuance);144145		// BlockInflation should be set after inflation is started146		// first inflation deposit should be equal to BlockInflation147		MockBlockNumberProvider::set(1);148149		// Start inflation as sudo150		assert_ok!(Inflation::start_inflation(RawOrigin::Root.into(), 1));151		assert_eq!(block_inflation!(), FIRST_YEAR_BLOCK_INFLATION);152		assert_eq!(153			Balances::free_balance(1234) - initial_issuance,154			block_inflation!()155		);156157		// Trigger inflation158		MockBlockNumberProvider::set(102);159		Inflation::on_initialize(0);160		assert_eq!(161			Balances::free_balance(1234) - initial_issuance,162			2 * block_inflation!()163		);164	});165}166167#[test]168fn inflation_second_deposit() {169	new_test_ext().execute_with(|| {170		// Total issuance = 1_000_000_000171		let initial_issuance: u64 = 1_000_000_000;172		let _ = <Balances as Currency<_>>::deposit_creating(&1234, initial_issuance);173		assert_eq!(Balances::free_balance(1234), initial_issuance);174		MockBlockNumberProvider::set(1);175176		// Start inflation as sudo177		assert_ok!(Inflation::start_inflation(RawOrigin::Root.into(), 1));178179		// Next inflation deposit happens when block is greater then or equal to NextInflationBlock180		let mut block: u64 = 2;181		let balance_before: u64 = Balances::free_balance(1234);182		while block < <pallet_inflation::NextInflationBlock<Test>>::get() {183			MockBlockNumberProvider::set(block as u64);184			Inflation::on_initialize(0);185			block += 1;186		}187		let balance_just_before: u64 = Balances::free_balance(1234);188		assert_eq!(balance_before, balance_just_before);189190		// The block with inflation191		MockBlockNumberProvider::set(block as u64);192		Inflation::on_initialize(0);193		let balance_after: u64 = Balances::free_balance(1234);194		assert_eq!(balance_after - balance_just_before, block_inflation!());195	});196}197198#[test]199fn inflation_in_1_year() {200	new_test_ext().execute_with(|| {201		// Total issuance = 1_000_000_000202		let initial_issuance: u64 = 1_000_000_000;203		let _ = <Balances as Currency<_>>::deposit_creating(&1234, initial_issuance);204		assert_eq!(Balances::free_balance(1234), initial_issuance);205		MockBlockNumberProvider::set(1);206207		// Start inflation as sudo208		assert_ok!(Inflation::start_inflation(RawOrigin::Root.into(), 1));209210		// Go through all the block inflations for year 1,211		// total issuance will be updated accordingly212		// Inflation is set to start in block 1, so first iteration is block 101213		for block in (101..YEAR).step_by(100) {214			MockBlockNumberProvider::set(block);215			Inflation::on_initialize(0);216		}217		assert_eq!(218			initial_issuance + (FIRST_YEAR_BLOCK_INFLATION * (YEAR / 100)),219			<Balances as Currency<_>>::total_issuance()220		);221222		MockBlockNumberProvider::set(YEAR + 1);223		Inflation::on_initialize(0);224		let block_inflation_year_2 = block_inflation!();225		// Expected 100-block inflation for year 2: 100 * 9.33% * initial issuance * 110% / YEAR == 1951226		let expecter_year_2_inflation: u64 = (initial_issuance227			+ FIRST_YEAR_BLOCK_INFLATION * YEAR / 100)228			* 933 * 100 / (10000 * YEAR);229		assert_eq!(block_inflation_year_2 / 10, expecter_year_2_inflation / 10); // divide by 10 for approx. equality230	});231}232233#[test]234fn inflation_start_large_kusama_block() {235	new_test_ext().execute_with(|| {236		// Total issuance = 1_000_000_000237		let initial_issuance: u64 = 1_000_000_000;238		let start_block: u64 = 10457457;239		let _ = <Balances as Currency<_>>::deposit_creating(&1234, initial_issuance);240		assert_eq!(Balances::free_balance(1234), initial_issuance);241		MockBlockNumberProvider::set(start_block);242243		// Start inflation as sudo244		assert_ok!(Inflation::start_inflation(245			RawOrigin::Root.into(),246			start_block247		));248249		// Go through all the block inflations for year 1,250		// total issuance will be updated accordingly251		// Inflation is set to start in block 1, so first iteration is block 101252		for block in (101..YEAR).step_by(100) {253			MockBlockNumberProvider::set(start_block + block);254			Inflation::on_initialize(0);255		}256		assert_eq!(257			initial_issuance + (FIRST_YEAR_BLOCK_INFLATION * (YEAR / 100)),258			<Balances as Currency<_>>::total_issuance()259		);260261		MockBlockNumberProvider::set(start_block + YEAR + 1);262		Inflation::on_initialize(0);263		let block_inflation_year_2 = block_inflation!();264		// Expected 100-block inflation for year 2: 100 * 9.33% * initial issuance * 110% / YEAR == 1951265		let expecter_year_2_inflation: u64 = (initial_issuance266			+ FIRST_YEAR_BLOCK_INFLATION * YEAR / 100)267			* 933 * 100 / (10000 * YEAR);268		assert_eq!(block_inflation_year_2 / 10, expecter_year_2_inflation / 10); // divide by 10 for approx. equality269	});270}271272#[test]273fn inflation_after_year_10_is_flat() {274	new_test_ext().execute_with(|| {275		// Total issuance = 1_000_000_000276		let initial_issuance: u64 = 1_000_000_000;277		let _ = <Balances as Currency<_>>::deposit_creating(&1234, initial_issuance);278		assert_eq!(Balances::free_balance(1234), initial_issuance);279		MockBlockNumberProvider::set(YEAR * 9 + 1);280281		// Start inflation as sudo282		assert_ok!(Inflation::start_inflation(RawOrigin::Root.into(), 1));283284		// Let inflation catch up285		for _year in 1..=9 {286			Inflation::on_initialize(0);287		}288289		for year in 10..=20 {290			let block_inflation_year_before = block_inflation!();291			MockBlockNumberProvider::set(YEAR * year + 1);292			Inflation::on_initialize(0);293			let block_inflation_year_after = block_inflation!();294295			// Assert that next year inflation is equal to previous year inflation296			assert_eq!(block_inflation_year_before, block_inflation_year_after);297		}298	});299}300301#[test]302fn inflation_rate_by_year() {303	new_test_ext().execute_with(|| {304		let payouts: u64 = YEAR / InflationBlockInterval::get() as u64;305306		// Inflation starts at 10% and does down by 2/3% every year until year 9 (included),307		// then it is flat.308		let payout_by_year: [u64; 11] = [1000, 933, 867, 800, 733, 667, 600, 533, 467, 400, 400];309310		// For accuracy total issuance = payout0 * payouts * 10;311		let initial_issuance: u64 = payout_by_year[0] * payouts * 10;312		let _ = <Balances as Currency<_>>::deposit_creating(&1234, initial_issuance);313		assert_eq!(Balances::free_balance(1234), initial_issuance);314315		// Start inflation as sudo316		assert_ok!(Inflation::start_inflation(RawOrigin::Root.into(), 1));317318		for year in 0..=10 {319			// Year first block320			MockBlockNumberProvider::set(YEAR * year + 1);321			Inflation::on_initialize(0);322			let mut actual_payout = block_inflation!();323			assert_eq!(actual_payout, payout_by_year[year as usize]);324325			// Year second block326			MockBlockNumberProvider::set(YEAR * year + 2);327			Inflation::on_initialize(0);328			actual_payout = block_inflation!();329			assert_eq!(actual_payout, payout_by_year[year as usize]);330331			// Year middle block332			MockBlockNumberProvider::set(year * YEAR + YEAR / 2);333			Inflation::on_initialize(0);334			actual_payout = block_inflation!();335			assert_eq!(actual_payout, payout_by_year[year as usize]);336337			// Year last block338			MockBlockNumberProvider::set((year + 1) * YEAR);339			Inflation::on_initialize(0);340			actual_payout = block_inflation!();341			assert_eq!(actual_payout, payout_by_year[year as usize]);342		}343	});344}