git.delta.rocks / unique-network / refs/commits / 0d52e2cbc000

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	type RuntimeFreezeReason = RuntimeFreezeReason;65}6667frame_support::construct_runtime!(68	pub enum Test {69		Balances: pallet_balances,70		System: frame_system,71		Inflation: pallet_inflation,72	}73);7475parameter_types! {76	pub const BlockHashCount: u32 = 250;77	pub BlockWeights: frame_system::limits::BlockWeights =78		frame_system::limits::BlockWeights::simple_max(Weight::from_parts(1024, 0));79	pub const SS58Prefix: u8 = 42;80}8182impl frame_system::Config for Test {83	type BaseCallFilter = Everything;84	type Block = Block;85	type BlockWeights = ();86	type BlockLength = ();87	type DbWeight = ();88	type RuntimeOrigin = RuntimeOrigin;89	type RuntimeCall = RuntimeCall;90	type Nonce = u64;91	type Hash = H256;92	type Hashing = BlakeTwo256;93	type AccountId = u64;94	type Lookup = IdentityLookup<Self::AccountId>;95	type RuntimeEvent = ();96	type BlockHashCount = BlockHashCount;97	type Version = ();98	type PalletInfo = PalletInfo;99	type AccountData = pallet_balances::AccountData<u64>;100	type OnNewAccount = ();101	type OnKilledAccount = ();102	type SystemWeightInfo = ();103	type SS58Prefix = SS58Prefix;104	type OnSetCode = ();105	type MaxConsumers = ConstU32<16>;106}107108parameter_types! {109	pub TreasuryAccountId: u64 = 1234;110	pub const InflationBlockInterval: u32 = 100; // every time per how many blocks inflation is applied111	pub static MockBlockNumberProvider: u32 = 0;112}113114impl BlockNumberProvider for MockBlockNumberProvider {115	type BlockNumber = u32;116117	fn current_block_number() -> Self::BlockNumber {118		Self::get()119	}120}121122impl pallet_inflation::Config for Test {123	type Currency = Balances;124	type TreasuryAccountId = TreasuryAccountId;125	type InflationBlockInterval = InflationBlockInterval;126	type OnInitializeBlockNumberProvider = MockBlockNumberProvider;127}128129pub fn new_test_ext() -> sp_io::TestExternalities {130	<frame_system::GenesisConfig<Test>>::default()131		.build_storage()132		.unwrap()133		.into()134}135136macro_rules! block_inflation {137	// Block inflation doesn't have any argumets138	() => {139		// Return BlockInflation state variable current value140		<pallet_inflation::BlockInflation<Test>>::get()141	};142}143144#[test]145fn uninitialized_inflation() {146	new_test_ext().execute_with(|| {147		let initial_issuance: u64 = 1_000_000_000;148		let _ = <Balances as Balanced<_>>::deposit(&1234, initial_issuance, Precision::Exact);149		assert_eq!(Balances::free_balance(1234), initial_issuance);150151		// BlockInflation should be set after inflation is started152		// first inflation deposit should be equal to BlockInflation153		MockBlockNumberProvider::set(1);154155		assert_eq!(block_inflation!(), 0);156	});157}158159#[test]160fn inflation_works() {161	new_test_ext().execute_with(|| {162		// Total issuance = 1_000_000_000163		let initial_issuance: u64 = 1_000_000_000;164		let _ = <Balances as Balanced<_>>::deposit(&1234, initial_issuance, Precision::Exact);165		assert_eq!(Balances::free_balance(1234), initial_issuance);166167		// BlockInflation should be set after inflation is started168		// first inflation deposit should be equal to BlockInflation169		MockBlockNumberProvider::set(1);170171		// Start inflation as sudo172		assert_ok!(Inflation::start_inflation(RawOrigin::Root.into(), 1));173		assert_eq!(block_inflation!(), FIRST_YEAR_BLOCK_INFLATION);174		assert_eq!(175			Balances::free_balance(1234) - initial_issuance,176			block_inflation!()177		);178179		// Trigger inflation180		MockBlockNumberProvider::set(102);181		Inflation::on_initialize(0);182		assert_eq!(183			Balances::free_balance(1234) - initial_issuance,184			2 * block_inflation!()185		);186	});187}188189#[test]190fn inflation_second_deposit() {191	new_test_ext().execute_with(|| {192		// Total issuance = 1_000_000_000193		let initial_issuance = 1_000_000_000;194		let _ = <Balances as Balanced<_>>::deposit(&1234, initial_issuance, Precision::Exact);195		assert_eq!(Balances::free_balance(1234), initial_issuance);196		MockBlockNumberProvider::set(1);197198		// Start inflation as sudo199		assert_ok!(Inflation::start_inflation(RawOrigin::Root.into(), 1));200201		// Next inflation deposit happens when block is greater then or equal to NextInflationBlock202		let mut block = 2;203		let balance_before = Balances::free_balance(1234);204		while block < <pallet_inflation::NextInflationBlock<Test>>::get() {205			MockBlockNumberProvider::set(block);206			Inflation::on_initialize(0);207			block += 1;208		}209		let balance_just_before = Balances::free_balance(1234);210		assert_eq!(balance_before, balance_just_before);211212		// The block with inflation213		MockBlockNumberProvider::set(block);214		Inflation::on_initialize(0);215		let balance_after = Balances::free_balance(1234);216		assert_eq!(balance_after - balance_just_before, block_inflation!());217	});218}219220#[test]221fn inflation_in_1_year() {222	new_test_ext().execute_with(|| {223		// Total issuance = 1_000_000_000224		let initial_issuance: u64 = 1_000_000_000;225		let _ = <Balances as Balanced<_>>::deposit(&1234, initial_issuance, Precision::Exact);226		assert_eq!(Balances::free_balance(1234), initial_issuance);227		MockBlockNumberProvider::set(1);228229		// Start inflation as sudo230		assert_ok!(Inflation::start_inflation(RawOrigin::Root.into(), 1));231232		// Go through all the block inflations for year 1,233		// total issuance will be updated accordingly234		// Inflation is set to start in block 1, so first iteration is block 101235		for block in (101..YEAR).step_by(100) {236			MockBlockNumberProvider::set(block);237			Inflation::on_initialize(0);238		}239		assert_eq!(240			initial_issuance + (FIRST_YEAR_BLOCK_INFLATION * ((YEAR as u64) / 100)),241			<Balances as Inspect<_>>::total_issuance()242		);243244		MockBlockNumberProvider::set(YEAR + 1);245		Inflation::on_initialize(0);246		let block_inflation_year_2 = block_inflation!();247		// Expected 100-block inflation for year 2: 100 * 9.33% * initial issuance * 110% / YEAR == 1951248		let expecter_year_2_inflation: u64 = (initial_issuance249			+ FIRST_YEAR_BLOCK_INFLATION * (YEAR as u64) / 100)250			* 933 * 100 / (10000 * (YEAR as u64));251		assert_eq!(block_inflation_year_2 / 10, expecter_year_2_inflation / 10); // divide by 10 for approx. equality252	});253}254255#[test]256fn inflation_start_large_kusama_block() {257	new_test_ext().execute_with(|| {258		// Total issuance = 1_000_000_000259		let initial_issuance = 1_000_000_000;260		let start_block = 10457457;261		let _ = <Balances as Balanced<_>>::deposit(&1234, initial_issuance, Precision::Exact);262		assert_eq!(Balances::free_balance(1234), initial_issuance);263		MockBlockNumberProvider::set(start_block);264265		// Start inflation as sudo266		assert_ok!(Inflation::start_inflation(267			RawOrigin::Root.into(),268			start_block269		));270271		// Go through all the block inflations for year 1,272		// total issuance will be updated accordingly273		// Inflation is set to start in block 1, so first iteration is block 101274		for block in (101..YEAR).step_by(100) {275			MockBlockNumberProvider::set(start_block + block);276			Inflation::on_initialize(0);277		}278		assert_eq!(279			initial_issuance + (FIRST_YEAR_BLOCK_INFLATION * ((YEAR as u64) / 100)),280			<Balances as Inspect<_>>::total_issuance()281		);282283		MockBlockNumberProvider::set(start_block + YEAR + 1);284		Inflation::on_initialize(0);285		let block_inflation_year_2 = block_inflation!();286		// Expected 100-block inflation for year 2: 100 * 9.33% * initial issuance * 110% / YEAR == 1951287		let expecter_year_2_inflation: u64 = (initial_issuance288			+ FIRST_YEAR_BLOCK_INFLATION * (YEAR as u64) / 100)289			* 933 * 100 / (10000 * (YEAR as u64));290		assert_eq!(block_inflation_year_2 / 10, expecter_year_2_inflation / 10); // divide by 10 for approx. equality291	});292}293294#[test]295fn inflation_after_year_10_is_flat() {296	new_test_ext().execute_with(|| {297		// Total issuance = 1_000_000_000298		let initial_issuance: u64 = 1_000_000_000;299		let _ = <Balances as Balanced<_>>::deposit(&1234, initial_issuance, Precision::Exact);300		assert_eq!(Balances::free_balance(1234), initial_issuance);301		MockBlockNumberProvider::set(YEAR * 9 + 1);302303		// Start inflation as sudo304		assert_ok!(Inflation::start_inflation(RawOrigin::Root.into(), 1));305306		// Let inflation catch up307		for _year in 1..=9 {308			Inflation::on_initialize(0);309		}310311		for year in 10..=20 {312			let block_inflation_year_before = block_inflation!();313			MockBlockNumberProvider::set(YEAR * year + 1);314			Inflation::on_initialize(0);315			let block_inflation_year_after = block_inflation!();316317			// Assert that next year inflation is equal to previous year inflation318			assert_eq!(block_inflation_year_before, block_inflation_year_after);319		}320	});321}322323#[test]324fn inflation_rate_by_year() {325	new_test_ext().execute_with(|| {326		let payouts = (YEAR / InflationBlockInterval::get()) as u64;327328		// Inflation starts at 10% and does down by 2/3% every year until year 9 (included),329		// then it is flat.330		let payout_by_year: [u64; 11] = [1000, 933, 867, 800, 733, 667, 600, 533, 467, 400, 400];331332		// For accuracy total issuance = payout0 * payouts * 10;333		let initial_issuance = payout_by_year[0] * payouts * 10;334		let _ = <Balances as Balanced<_>>::deposit(&1234, initial_issuance, Precision::Exact);335		assert_eq!(Balances::free_balance(1234), initial_issuance);336337		// Start inflation as sudo338		assert_ok!(Inflation::start_inflation(RawOrigin::Root.into(), 1));339340		for year in 0..=10 {341			// Year first block342			MockBlockNumberProvider::set(YEAR * year + 1);343			Inflation::on_initialize(0);344			let mut actual_payout = block_inflation!();345			assert_eq!(actual_payout, payout_by_year[year as usize]);346347			// Year second block348			MockBlockNumberProvider::set(YEAR * year + 2);349			Inflation::on_initialize(0);350			actual_payout = block_inflation!();351			assert_eq!(actual_payout, payout_by_year[year as usize]);352353			// Year middle block354			MockBlockNumberProvider::set(year * YEAR + YEAR / 2);355			Inflation::on_initialize(0);356			actual_payout = block_inflation!();357			assert_eq!(actual_payout, payout_by_year[year as usize]);358359			// Year last block360			MockBlockNumberProvider::set((year + 1) * YEAR);361			Inflation::on_initialize(0);362			actual_payout = block_inflation!();363			assert_eq!(actual_payout, payout_by_year[year as usize]);364		}365	});366}