git.delta.rocks / unique-network / refs/commits / 8a37f3ec9fdf

1#![cfg(test)]2#![allow(clippy::from_over_into)]3use crate as pallet_inflation;45use frame_support::{6	traits::{Currency},7	parameter_types,8};9use frame_support::{10	traits::{OnInitialize, Everything},11};12use sp_core::H256;13use sp_runtime::{14	traits::{BlakeTwo256, IdentityLookup},15	testing::Header,16};1718type UncheckedExtrinsic = frame_system::mocking::MockUncheckedExtrinsic<Test>;19type Block = frame_system::mocking::MockBlock<Test>;2021const YEAR: u64 = 2_629_800;2223parameter_types! {24	pub const ExistentialDeposit: u64 = 1;25	pub const MaxLocks: u32 = 50;26}2728impl pallet_balances::Config for Test {29	type AccountStore = System;30	type Balance = u64;31	type DustRemoval = ();32	type Event = ();33	type ExistentialDeposit = ExistentialDeposit;34	type WeightInfo = ();35	type MaxLocks = MaxLocks;36	type MaxReserves = ();37	type ReserveIdentifier = ();38}3940frame_support::construct_runtime!(41	pub enum Test where42		Block = Block,43		NodeBlock = Block,44		UncheckedExtrinsic = UncheckedExtrinsic,45	{46		Balances: pallet_balances::{Pallet, Call, Storage},47		System: frame_system::{Pallet, Call, Config, Storage, Event<T>},48		Inflation: pallet_inflation::{Pallet, Call, Storage},49	}50);5152parameter_types! {53	pub const BlockHashCount: u64 = 250;54	pub BlockWeights: frame_system::limits::BlockWeights =55		frame_system::limits::BlockWeights::simple_max(1024);56	pub const SS58Prefix: u8 = 42;57}5859impl frame_system::Config for Test {60	type BaseCallFilter = Everything;61	type BlockWeights = ();62	type BlockLength = ();63	type DbWeight = ();64	type Origin = Origin;65	type Call = Call;66	type Index = u64;67	type BlockNumber = u64;68	type Hash = H256;69	type Hashing = BlakeTwo256;70	type AccountId = u64;71	type Lookup = IdentityLookup<Self::AccountId>;72	type Header = Header;73	type Event = ();74	type BlockHashCount = BlockHashCount;75	type Version = ();76	type PalletInfo = PalletInfo;77	type AccountData = pallet_balances::AccountData<u64>;78	type OnNewAccount = ();79	type OnKilledAccount = ();80	type SystemWeightInfo = ();81	type SS58Prefix = SS58Prefix;82	type OnSetCode = ();83}8485parameter_types! {86	pub TreasuryAccountId: u64 = 1234;87	pub const InflationBlockInterval: u32 = 100; // every time per how many blocks inflation is applied88}8990impl pallet_inflation::Config for Test {91	type Currency = Balances;92	type TreasuryAccountId = TreasuryAccountId;93	type InflationBlockInterval = InflationBlockInterval;94}9596pub fn new_test_ext() -> sp_io::TestExternalities {97	frame_system::GenesisConfig::default()98		.build_storage::<Test>()99		.unwrap()100		.into()101}102103#[test]104fn inflation_works() {105	new_test_ext().execute_with(|| {106		// Total issuance = 1_000_000_000107		let initial_issuance: u64 = 1_000_000_000;108		let _ = <Balances as Currency<_>>::deposit_creating(&1234, initial_issuance);109		assert_eq!(Balances::free_balance(1234), initial_issuance);110111		// BlockInflation should be set after 1st block and112		// first inflation deposit should be equal to BlockInflation113		Inflation::on_initialize(1);114115		// Expected 100-block inflation for year 1 is 100 * 100_000_000 / YEAR = 3803116		assert_eq!(Inflation::block_inflation(), 3803);117		assert_eq!(118			Balances::free_balance(1234) - initial_issuance,119			Inflation::block_inflation()120		);121	});122}123124#[test]125fn inflation_second_deposit() {126	new_test_ext().execute_with(|| {127		// Total issuance = 1_000_000_000128		let initial_issuance: u64 = 1_000_000_000;129		let _ = <Balances as Currency<_>>::deposit_creating(&1234, initial_issuance);130		assert_eq!(Balances::free_balance(1234), initial_issuance);131		Inflation::on_initialize(1);132133		// Next inflation deposit happens when block is multiple of InflationBlockInterval134		let mut block: u32 = 2;135		let balance_before: u64 = Balances::free_balance(1234);136		while block % InflationBlockInterval::get() != 0 {137			Inflation::on_initialize(block as u64);138			block += 1;139		}140		let balance_just_before: u64 = Balances::free_balance(1234);141		assert_eq!(balance_before, balance_just_before);142143		// The block with inflation144		Inflation::on_initialize(block as u64);145		let balance_after: u64 = Balances::free_balance(1234);146		assert_eq!(147			balance_after - balance_just_before,148			Inflation::block_inflation()149		);150	});151}152153#[test]154fn inflation_in_1_year() {155	new_test_ext().execute_with(|| {156		// Total issuance = 1_000_000_000157		let initial_issuance: u64 = 1_000_000_000;158		let _ = <Balances as Currency<_>>::deposit_creating(&1234, initial_issuance);159		assert_eq!(Balances::free_balance(1234), initial_issuance);160		Inflation::on_initialize(1);161162		// Go through all the block inflations for year 1,163		// total issuance will be updated accordingly164		for block in (100..YEAR).step_by(100) {165			Inflation::on_initialize(block);166		}167		assert_eq!(168			initial_issuance + (3803 * (YEAR / 100)),169			<Balances as Currency<_>>::total_issuance()170		);171172		Inflation::on_initialize(YEAR);173		let block_inflation_year_1 = Inflation::block_inflation();174		// Expected 100-block inflation for year 2: 100 * 9.33% * initial issuance * 110% / YEAR = 3904175		assert_eq!(block_inflation_year_1, 3904);176	});177}178179#[test]180fn inflation_in_1_to_9_years() {181	new_test_ext().execute_with(|| {182		// Total issuance = 1_000_000_000183		let initial_issuance: u64 = 1_000_000_000;184		let _ = <Balances as Currency<_>>::deposit_creating(&1234, initial_issuance);185		assert_eq!(Balances::free_balance(1234), initial_issuance);186		Inflation::on_initialize(1);187188		for year in 1..=9 {189			let block_inflation_year_before = Inflation::block_inflation();190			Inflation::on_initialize(YEAR * year);191			let block_inflation_year_after = Inflation::block_inflation();192193			// SBP M2 review: this is actually not true (not for the first few years)194			// Assert that next year inflation is less than previous year inflation195			assert!(block_inflation_year_before > block_inflation_year_after);196		}197	});198}199200#[test]201fn inflation_after_year_10_is_flat() {202	new_test_ext().execute_with(|| {203		// Total issuance = 1_000_000_000204		let initial_issuance: u64 = 1_000_000_000;205		let _ = <Balances as Currency<_>>::deposit_creating(&1234, initial_issuance);206		assert_eq!(Balances::free_balance(1234), initial_issuance);207		Inflation::on_initialize(YEAR * 9);208209		for year in 10..=20 {210			let block_inflation_year_before = Inflation::block_inflation();211			Inflation::on_initialize(YEAR * year);212			let block_inflation_year_after = Inflation::block_inflation();213214			// Assert that next year inflation is equal to previous year inflation215			assert_eq!(block_inflation_year_before, block_inflation_year_after);216		}217	});218}219220#[test]221fn inflation_rate_by_year() {222	new_test_ext().execute_with(|| {223		let payouts: u64 = YEAR / InflationBlockInterval::get() as u64;224225		// Inflation starts at 10% and does down by 2/3% every year until year 9 (included),226		// then it is flat.227		let payout_by_year: [u64; 11] = [1000, 933, 867, 800, 733, 667, 600, 533, 467, 400, 400];228229		// For accuracy total issuance = payout0 * payouts * 10;230		let initial_issuance: u64 = payout_by_year[0] * payouts * 10;231		let _ = <Balances as Currency<_>>::deposit_creating(&1234, initial_issuance);232		assert_eq!(Balances::free_balance(1234), initial_issuance);233234		for year in 0..=10 {235			// Year first block236			Inflation::on_initialize(year * YEAR);237			let mut actual_payout = Inflation::block_inflation();238			assert_eq!(actual_payout, payout_by_year[year as usize]);239240			// Year second block241			Inflation::on_initialize(year * YEAR + 1);242			actual_payout = Inflation::block_inflation();243			assert_eq!(actual_payout, payout_by_year[year as usize]);244245			// Year middle block246			Inflation::on_initialize(year * YEAR + YEAR / 2);247			actual_payout = Inflation::block_inflation();248			assert_eq!(actual_payout, payout_by_year[year as usize]);249250			// Year last block251			Inflation::on_initialize((year + 1) * YEAR - 1);252			actual_payout = Inflation::block_inflation();253			assert_eq!(actual_payout, payout_by_year[year as usize]);254		}255	});256}