git.delta.rocks / unique-network / refs/commits / 83c9d6351207

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 frame_support::{20	assert_ok, parameter_types,21	traits::{22		fungible::{Balanced, Inspect},23		tokens::Precision,24		ConstU32, Everything, OnInitialize,25	},26	weights::Weight,27};28use frame_system::RawOrigin;29use sp_core::H256;30use sp_runtime::{31	traits::{BlakeTwo256, BlockNumberProvider, IdentityLookup},32	BuildStorage,33};3435use crate as pallet_inflation;3637type Block = frame_system::mocking::MockBlockU32<Test>;3839// 6-second blocks40// const YEAR: u32 = 2_629_800; // 12-second blocks41// Expected 100-block inflation for year 1 is 100 * 100_000_000 / YEAR = FIRST_YEAR_BLOCK_INFLATION42const YEAR: u32 = 5_259_600;43const FIRST_YEAR_BLOCK_INFLATION: u64 = 1901;4445parameter_types! {46	pub const ExistentialDeposit: u64 = 1;47	pub const MaxLocks: u32 = 50;48}4950impl pallet_balances::Config for Test {51	type AccountStore = System;52	type Balance = u64;53	type DustRemoval = ();54	type RuntimeEvent = ();55	type ExistentialDeposit = ExistentialDeposit;56	type WeightInfo = ();57	type MaxLocks = MaxLocks;58	type MaxReserves = ();59	type ReserveIdentifier = ();60	type FreezeIdentifier = ();61	type MaxHolds = ();62	type MaxFreezes = ();63	type RuntimeHoldReason = RuntimeHoldReason;64}6566frame_support::construct_runtime!(67	pub enum Test {68		Balances: pallet_balances,69		System: frame_system,70		Inflation: pallet_inflation,71	}72);7374parameter_types! {75	pub const BlockHashCount: u32 = 250;76	pub BlockWeights: frame_system::limits::BlockWeights =77		frame_system::limits::BlockWeights::simple_max(Weight::from_parts(1024, 0));78	pub const SS58Prefix: u8 = 42;79}8081impl frame_system::Config for Test {82	type BaseCallFilter = Everything;83	type Block = Block;84	type BlockWeights = ();85	type BlockLength = ();86	type DbWeight = ();87	type RuntimeOrigin = RuntimeOrigin;88	type RuntimeCall = RuntimeCall;89	type Nonce = u64;90	type Hash = H256;91	type Hashing = BlakeTwo256;92	type AccountId = u64;93	type Lookup = IdentityLookup<Self::AccountId>;94	type RuntimeEvent = ();95	type BlockHashCount = BlockHashCount;96	type Version = ();97	type PalletInfo = PalletInfo;98	type AccountData = pallet_balances::AccountData<u64>;99	type OnNewAccount = ();100	type OnKilledAccount = ();101	type SystemWeightInfo = ();102	type SS58Prefix = SS58Prefix;103	type OnSetCode = ();104	type MaxConsumers = ConstU32<16>;105}106107parameter_types! {108	pub TreasuryAccountId: u64 = 1234;109	pub const InflationBlockInterval: u32 = 10; // every time per how many blocks inflation is applied110	pub static MockBlockNumberProvider: u32 = 0;111}112113impl BlockNumberProvider for MockBlockNumberProvider {114	type BlockNumber = u32;115116	fn current_block_number() -> Self::BlockNumber {117		Self::get()118	}119}120121impl pallet_inflation::Config for Test {122	type Currency = Balances;123	type TreasuryAccountId = TreasuryAccountId;124	type InflationBlockInterval = InflationBlockInterval;125	type OnInitializeBlockNumberProvider = MockBlockNumberProvider;126}127128pub fn new_test_ext() -> sp_io::TestExternalities {129	<frame_system::GenesisConfig<Test>>::default()130		.build_storage()131		.unwrap()132		.into()133}134135macro_rules! block_inflation {136	// Block inflation doesn't have any argumets137	() => {138		// Return BlockInflation state variable current value139		<pallet_inflation::BlockInflation<Test>>::get()140	};141}142143#[test]144fn uninitialized_inflation() {145	new_test_ext().execute_with(|| {146		let initial_issuance: u64 = 1_000_000_000;147		let _ = <Balances as Balanced<_>>::deposit(&1234, initial_issuance, Precision::Exact);148		assert_eq!(Balances::free_balance(1234), initial_issuance);149150		// BlockInflation should be set after inflation is started151		// first inflation deposit should be equal to BlockInflation152		MockBlockNumberProvider::set(1);153154		assert_eq!(block_inflation!(), 0);155	});156}157158#[test]159fn inflation_works() {160	new_test_ext().execute_with(|| {161		// Total issuance = 1_000_000_000162		let initial_issuance: u64 = 1_000_000_000;163		let _ = <Balances as Balanced<_>>::deposit(&1234, initial_issuance, Precision::Exact);164		assert_eq!(Balances::free_balance(1234), initial_issuance);165166		// BlockInflation should be set after inflation is started167		// first inflation deposit should be equal to BlockInflation168		MockBlockNumberProvider::set(1);169170		// Start inflation as sudo171		assert_ok!(Inflation::start_inflation(RawOrigin::Root.into(), 1));172		assert_eq!(block_inflation!(), FIRST_YEAR_BLOCK_INFLATION);173		assert_eq!(174			Balances::free_balance(1234) - initial_issuance,175			block_inflation!()176		);177178		// Trigger inflation179		MockBlockNumberProvider::set(102);180		Inflation::on_initialize(0);181		assert_eq!(182			Balances::free_balance(1234) - initial_issuance,183			2 * block_inflation!()184		);185	});186}187188#[test]189fn inflation_second_deposit() {190	new_test_ext().execute_with(|| {191		// Total issuance = 1_000_000_000192		let initial_issuance = 1_000_000_000;193		let _ = <Balances as Balanced<_>>::deposit(&1234, initial_issuance, Precision::Exact);194		assert_eq!(Balances::free_balance(1234), initial_issuance);195		MockBlockNumberProvider::set(1);196197		// Start inflation as sudo198		assert_ok!(Inflation::start_inflation(RawOrigin::Root.into(), 1));199200		// Next inflation deposit happens when block is greater then or equal to NextInflationBlock201		let mut block = 2;202		let balance_before = Balances::free_balance(1234);203		while block < <pallet_inflation::NextInflationBlock<Test>>::get() {204			MockBlockNumberProvider::set(block);205			Inflation::on_initialize(0);206			block += 1;207		}208		let balance_just_before = Balances::free_balance(1234);209		assert_eq!(balance_before, balance_just_before);210211		// The block with inflation212		MockBlockNumberProvider::set(block);213		Inflation::on_initialize(0);214		let balance_after = Balances::free_balance(1234);215		assert_eq!(balance_after - balance_just_before, block_inflation!());216	});217}218219#[test]220fn inflation_in_1_year() {221	new_test_ext().execute_with(|| {222		// Total issuance = 1_000_000_000223		let initial_issuance: u64 = 1_000_000_000;224		let _ = <Balances as Balanced<_>>::deposit(&1234, initial_issuance, Precision::Exact);225		assert_eq!(Balances::free_balance(1234), initial_issuance);226		MockBlockNumberProvider::set(1);227228		// Start inflation as sudo229		assert_ok!(Inflation::start_inflation(RawOrigin::Root.into(), 1));230231		// Go through all the block inflations for year 1,232		// total issuance will be updated accordingly233		// Inflation is set to start in block 1, so first iteration is block 101234		for block in (101..YEAR).step_by(100) {235			MockBlockNumberProvider::set(block);236			Inflation::on_initialize(0);237		}238		assert_eq!(239			initial_issuance + (FIRST_YEAR_BLOCK_INFLATION * ((YEAR as u64) / 100)),240			<Balances as Inspect<_>>::total_issuance()241		);242243		MockBlockNumberProvider::set(YEAR + 1);244		Inflation::on_initialize(0);245		let block_inflation_year_2 = block_inflation!();246		// Expected 100-block inflation for year 2: 100 * 9.33% * initial issuance * 110% / YEAR == 1951247		let expecter_year_2_inflation: u64 = (initial_issuance248			+ FIRST_YEAR_BLOCK_INFLATION * (YEAR as u64) / 100)249			* 933 * 100 / (10000 * (YEAR as u64));250		assert_eq!(block_inflation_year_2 / 10, expecter_year_2_inflation / 10); // divide by 10 for approx. equality251	});252}253254#[test]255fn inflation_start_large_kusama_block() {256	new_test_ext().execute_with(|| {257		// Total issuance = 1_000_000_000258		let initial_issuance = 1_000_000_000;259		let start_block = 10457457;260		let _ = <Balances as Balanced<_>>::deposit(&1234, initial_issuance, Precision::Exact);261		assert_eq!(Balances::free_balance(1234), initial_issuance);262		MockBlockNumberProvider::set(start_block);263264		// Start inflation as sudo265		assert_ok!(Inflation::start_inflation(266			RawOrigin::Root.into(),267			start_block268		));269270		// Go through all the block inflations for year 1,271		// total issuance will be updated accordingly272		// Inflation is set to start in block 1, so first iteration is block 101273		for block in (101..YEAR).step_by(100) {274			MockBlockNumberProvider::set(start_block + block);275			Inflation::on_initialize(0);276		}277		assert_eq!(278			initial_issuance + (FIRST_YEAR_BLOCK_INFLATION * ((YEAR as u64) / 100)),279			<Balances as Inspect<_>>::total_issuance()280		);281282		MockBlockNumberProvider::set(start_block + YEAR + 1);283		Inflation::on_initialize(0);284		let block_inflation_year_2 = block_inflation!();285		// Expected 100-block inflation for year 2: 100 * 9.33% * initial issuance * 110% / YEAR == 1951286		let expecter_year_2_inflation: u64 = (initial_issuance287			+ FIRST_YEAR_BLOCK_INFLATION * (YEAR as u64) / 100)288			* 933 * 100 / (10000 * (YEAR as u64));289		assert_eq!(block_inflation_year_2 / 10, expecter_year_2_inflation / 10); // divide by 10 for approx. equality290	});291}292293#[test]294fn inflation_after_year_10_is_flat() {295	new_test_ext().execute_with(|| {296		// Total issuance = 1_000_000_000297		let initial_issuance: u64 = 1_000_000_000;298		let _ = <Balances as Balanced<_>>::deposit(&1234, initial_issuance, Precision::Exact);299		assert_eq!(Balances::free_balance(1234), initial_issuance);300		MockBlockNumberProvider::set(YEAR * 9 + 1);301302		// Start inflation as sudo303		assert_ok!(Inflation::start_inflation(RawOrigin::Root.into(), 1));304305		// Let inflation catch up306		for _year in 1..=9 {307			Inflation::on_initialize(0);308		}309310		for year in 10..=20 {311			let block_inflation_year_before = block_inflation!();312			MockBlockNumberProvider::set(YEAR * year + 1);313			Inflation::on_initialize(0);314			let block_inflation_year_after = block_inflation!();315316			// Assert that next year inflation is equal to previous year inflation317			assert_eq!(block_inflation_year_before, block_inflation_year_after);318		}319	});320}321322#[test]323fn inflation_rate_by_year() {324	new_test_ext().execute_with(|| {325		let payouts = (YEAR / InflationBlockInterval::get()) as u64;326327		// Inflation starts at 10% and does down by 2/3% every year until year 9 (included),328		// then it is flat.329		let payout_by_year: [u64; 11] = [1000, 933, 867, 800, 733, 667, 600, 533, 467, 400, 400];330331		// For accuracy total issuance = payout0 * payouts * 10;332		let initial_issuance = payout_by_year[0] * payouts * 10;333		let _ = <Balances as Balanced<_>>::deposit(&1234, initial_issuance, Precision::Exact);334		assert_eq!(Balances::free_balance(1234), initial_issuance);335336		// Start inflation as sudo337		assert_ok!(Inflation::start_inflation(RawOrigin::Root.into(), 1));338339		for year in 0..=10 {340			// Year first block341			MockBlockNumberProvider::set(YEAR * year + 1);342			Inflation::on_initialize(0);343			let mut actual_payout = block_inflation!();344			assert_eq!(actual_payout, payout_by_year[year as usize]);345346			// Year second block347			MockBlockNumberProvider::set(YEAR * year + 2);348			Inflation::on_initialize(0);349			actual_payout = block_inflation!();350			assert_eq!(actual_payout, payout_by_year[year as usize]);351352			// Year middle block353			MockBlockNumberProvider::set(year * YEAR + YEAR / 2);354			Inflation::on_initialize(0);355			actual_payout = block_inflation!();356			assert_eq!(actual_payout, payout_by_year[year as usize]);357358			// Year last block359			MockBlockNumberProvider::set((year + 1) * YEAR);360			Inflation::on_initialize(0);361			actual_payout = block_inflation!();362			assert_eq!(actual_payout, payout_by_year[year as usize]);363		}364	});365}