This repository has been archived by the owner on Nov 15, 2023. It is now read-only.
-
Notifications
You must be signed in to change notification settings - Fork 2.6k
/
lib.rs
647 lines (553 loc) · 21.3 KB
/
lib.rs
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
// Copyright 2017-2019 Parity Technologies (UK) Ltd.
// This file is part of Substrate.
// Substrate is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// Substrate is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with Substrate. If not, see <http://www.gnu.org/licenses/>.
//! # Treasury Module
//!
//! The Treasury module provides a "pot" of funds that can be managed by stakeholders in the
//! system and a structure for making spending proposals from this pot.
//!
//! - [`treasury::Trait`](./trait.Trait.html)
//! - [`Call`](./enum.Call.html)
//!
//! ## Overview
//!
//! The Treasury Module itself provides the pot to store funds, and a means for stakeholders to
//! propose, approve, and deny expendatures. The chain will need to provide a method (e.g.
//! inflation, fees) for collecting funds.
//!
//! By way of example, the Council could vote to fund the Treasury with a portion of the block
//! reward and use the funds to pay developers.
//!
//! ### Terminology
//!
//! - **Proposal:** A suggestion to allocate funds from the pot to a beneficiary.
//! - **Beneficiary:** An account who will receive the funds from a proposal iff
//! the proposal is approved.
//! - **Deposit:** Funds that a proposer must lock when making a proposal. The
//! deposit will be returned or slashed if the proposal is approved or rejected
//! respectively.
//! - **Pot:** Unspent funds accumulated by the treasury module.
//!
//! ## Interface
//!
//! ### Dispatchable Functions
//!
//! - `propose_spend` - Make a spending proposal and stake the required deposit.
//! - `set_pot` - Set the spendable balance of funds.
//! - `configure` - Configure the module's proposal requirements.
//! - `reject_proposal` - Reject a proposal, slashing the deposit.
//! - `approve_proposal` - Accept the proposal, returning the deposit.
//!
//! ## GenesisConfig
//!
//! The Treasury module depends on the [`GenesisConfig`](./struct.GenesisConfig.html).
#![cfg_attr(not(feature = "std"), no_std)]
#[cfg(feature = "std")]
use serde::{Serialize, Deserialize};
use rstd::prelude::*;
use support::{decl_module, decl_storage, decl_event, ensure, print};
use support::traits::{
Currency, ExistenceRequirement, Get, Imbalance, OnUnbalanced,
ReservableCurrency, WithdrawReason
};
use sr_primitives::{Permill, ModuleId};
use sr_primitives::traits::{
Zero, EnsureOrigin, StaticLookup, AccountIdConversion, Saturating
};
use sr_primitives::weights::SimpleDispatchInfo;
use codec::{Encode, Decode};
use system::ensure_signed;
type BalanceOf<T> = <<T as Trait>::Currency as Currency<<T as system::Trait>::AccountId>>::Balance;
type PositiveImbalanceOf<T> = <<T as Trait>::Currency as Currency<<T as system::Trait>::AccountId>>::PositiveImbalance;
type NegativeImbalanceOf<T> = <<T as Trait>::Currency as Currency<<T as system::Trait>::AccountId>>::NegativeImbalance;
const MODULE_ID: ModuleId = ModuleId(*b"py/trsry");
pub trait Trait: system::Trait {
/// The staking balance.
type Currency: Currency<Self::AccountId> + ReservableCurrency<Self::AccountId>;
/// Origin from which approvals must come.
type ApproveOrigin: EnsureOrigin<Self::Origin>;
/// Origin from which rejections must come.
type RejectOrigin: EnsureOrigin<Self::Origin>;
/// The overarching event type.
type Event: From<Event<Self>> + Into<<Self as system::Trait>::Event>;
/// Handler for the unbalanced decrease when slashing for a rejected proposal.
type ProposalRejection: OnUnbalanced<NegativeImbalanceOf<Self>>;
/// Fraction of a proposal's value that should be bonded in order to place the proposal.
/// An accepted proposal gets these back. A rejected proposal does not.
type ProposalBond: Get<Permill>;
/// Minimum amount of funds that should be placed in a deposit for making a proposal.
type ProposalBondMinimum: Get<BalanceOf<Self>>;
/// Period between successive spends.
type SpendPeriod: Get<Self::BlockNumber>;
/// Percentage of spare funds (if any) that are burnt per spend period.
type Burn: Get<Permill>;
}
type ProposalIndex = u32;
decl_module! {
pub struct Module<T: Trait> for enum Call where origin: T::Origin {
/// Fraction of a proposal's value that should be bonded in order to place the proposal.
/// An accepted proposal gets these back. A rejected proposal does not.
const ProposalBond: Permill = T::ProposalBond::get();
/// Minimum amount of funds that should be placed in a deposit for making a proposal.
const ProposalBondMinimum: BalanceOf<T> = T::ProposalBondMinimum::get();
/// Period between successive spends.
const SpendPeriod: T::BlockNumber = T::SpendPeriod::get();
/// Percentage of spare funds (if any) that are burnt per spend period.
const Burn: Permill = T::Burn::get();
fn deposit_event() = default;
/// Put forward a suggestion for spending. A deposit proportional to the value
/// is reserved and slashed if the proposal is rejected. It is returned once the
/// proposal is awarded.
///
/// # <weight>
/// - O(1).
/// - Limited storage reads.
/// - One DB change, one extra DB entry.
/// # </weight>
#[weight = SimpleDispatchInfo::FixedNormal(500_000)]
fn propose_spend(
origin,
#[compact] value: BalanceOf<T>,
beneficiary: <T::Lookup as StaticLookup>::Source
) {
let proposer = ensure_signed(origin)?;
let beneficiary = T::Lookup::lookup(beneficiary)?;
let bond = Self::calculate_bond(value);
T::Currency::reserve(&proposer, bond)
.map_err(|_| "Proposer's balance too low")?;
let c = Self::proposal_count();
ProposalCount::put(c + 1);
<Proposals<T>>::insert(c, Proposal { proposer, value, beneficiary, bond });
Self::deposit_event(RawEvent::Proposed(c));
}
/// Reject a proposed spend. The original deposit will be slashed.
///
/// # <weight>
/// - O(1).
/// - Limited storage reads.
/// - One DB clear.
/// # </weight>
#[weight = SimpleDispatchInfo::FixedOperational(100_000)]
fn reject_proposal(origin, #[compact] proposal_id: ProposalIndex) {
T::RejectOrigin::ensure_origin(origin)?;
let proposal = <Proposals<T>>::take(proposal_id).ok_or("No proposal at that index")?;
let value = proposal.bond;
let imbalance = T::Currency::slash_reserved(&proposal.proposer, value).0;
T::ProposalRejection::on_unbalanced(imbalance);
}
/// Approve a proposal. At a later time, the proposal will be allocated to the beneficiary
/// and the original deposit will be returned.
///
/// # <weight>
/// - O(1).
/// - Limited storage reads.
/// - One DB change.
/// # </weight>
#[weight = SimpleDispatchInfo::FixedOperational(100_000)]
fn approve_proposal(origin, #[compact] proposal_id: ProposalIndex) {
T::ApproveOrigin::ensure_origin(origin)?;
ensure!(<Proposals<T>>::exists(proposal_id), "No proposal at that index");
Approvals::mutate(|v| v.push(proposal_id));
}
fn on_finalize(n: T::BlockNumber) {
// Check to see if we should spend some funds!
if (n % T::SpendPeriod::get()).is_zero() {
Self::spend_funds();
}
}
}
}
/// A spending proposal.
#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]
#[derive(Encode, Decode, Clone, PartialEq, Eq, sr_primitives::RuntimeDebug)]
pub struct Proposal<AccountId, Balance> {
proposer: AccountId,
value: Balance,
beneficiary: AccountId,
bond: Balance,
}
decl_storage! {
trait Store for Module<T: Trait> as Treasury {
/// Number of proposals that have been made.
ProposalCount get(fn proposal_count): ProposalIndex;
/// Proposals that have been made.
Proposals get(fn proposals): map ProposalIndex => Option<Proposal<T::AccountId, BalanceOf<T>>>;
/// Proposal indices that have been approved but not yet awarded.
Approvals get(fn approvals): Vec<ProposalIndex>;
}
add_extra_genesis {
build(|_config| {
// Create Treasury account
let _ = T::Currency::make_free_balance_be(
&<Module<T>>::account_id(),
T::Currency::minimum_balance(),
);
});
}
}
decl_event!(
pub enum Event<T>
where
Balance = BalanceOf<T>,
<T as system::Trait>::AccountId
{
/// New proposal.
Proposed(ProposalIndex),
/// We have ended a spend period and will now allocate funds.
Spending(Balance),
/// Some funds have been allocated.
Awarded(ProposalIndex, Balance, AccountId),
/// Some of our funds have been burnt.
Burnt(Balance),
/// Spending has finished; this is the amount that rolls over until next spend.
Rollover(Balance),
/// Some funds have been deposited.
Deposit(Balance),
}
);
impl<T: Trait> Module<T> {
// Add public immutables and private mutables.
/// The account ID of the treasury pot.
///
/// This actually does computation. If you need to keep using it, then make sure you cache the
/// value and only call this once.
pub fn account_id() -> T::AccountId {
MODULE_ID.into_account()
}
/// The needed bond for a proposal whose spend is `value`.
fn calculate_bond(value: BalanceOf<T>) -> BalanceOf<T> {
T::ProposalBondMinimum::get().max(T::ProposalBond::get() * value)
}
// Spend some money!
fn spend_funds() {
let mut budget_remaining = Self::pot();
Self::deposit_event(RawEvent::Spending(budget_remaining));
let mut missed_any = false;
let mut imbalance = <PositiveImbalanceOf<T>>::zero();
Approvals::mutate(|v| {
v.retain(|&index| {
// Should always be true, but shouldn't panic if false or we're screwed.
if let Some(p) = Self::proposals(index) {
if p.value <= budget_remaining {
budget_remaining -= p.value;
<Proposals<T>>::remove(index);
// return their deposit.
let _ = T::Currency::unreserve(&p.proposer, p.bond);
// provide the allocation.
imbalance.subsume(T::Currency::deposit_creating(&p.beneficiary, p.value));
Self::deposit_event(RawEvent::Awarded(index, p.value, p.beneficiary));
false
} else {
missed_any = true;
true
}
} else {
false
}
});
});
if !missed_any {
// burn some proportion of the remaining budget if we run a surplus.
let burn = (T::Burn::get() * budget_remaining).min(budget_remaining);
budget_remaining -= burn;
imbalance.subsume(T::Currency::burn(burn));
Self::deposit_event(RawEvent::Burnt(burn))
}
// Must never be an error, but better to be safe.
// proof: budget_remaining is account free balance minus ED;
// Thus we can't spend more than account free balance minus ED;
// Thus account is kept alive; qed;
if let Err(problem) = T::Currency::settle(
&Self::account_id(),
imbalance,
WithdrawReason::Transfer.into(),
ExistenceRequirement::KeepAlive
) {
print("Inconsistent state - couldn't settle imbalance for funds spent by treasury");
// Nothing else to do here.
drop(problem);
}
Self::deposit_event(RawEvent::Rollover(budget_remaining));
}
/// Return the amount of money in the pot.
// The existential deposit is not part of the pot so treasury account never gets deleted.
fn pot() -> BalanceOf<T> {
T::Currency::free_balance(&Self::account_id())
// Must never be less than 0 but better be safe.
.saturating_sub(T::Currency::minimum_balance())
}
}
impl<T: Trait> OnUnbalanced<NegativeImbalanceOf<T>> for Module<T> {
fn on_nonzero_unbalanced(amount: NegativeImbalanceOf<T>) {
let numeric_amount = amount.peek();
// Must resolve into existing but better to be safe.
let _ = T::Currency::resolve_creating(&Self::account_id(), amount);
Self::deposit_event(RawEvent::Deposit(numeric_amount));
}
}
#[cfg(test)]
mod tests {
use super::*;
use support::{assert_noop, assert_ok, impl_outer_origin, parameter_types};
use primitives::H256;
use sr_primitives::{
traits::{BlakeTwo256, OnFinalize, IdentityLookup}, testing::Header, Perbill
};
impl_outer_origin! {
pub enum Origin for Test {}
}
#[derive(Clone, Eq, PartialEq)]
pub struct Test;
parameter_types! {
pub const BlockHashCount: u64 = 250;
pub const MaximumBlockWeight: u32 = 1024;
pub const MaximumBlockLength: u32 = 2 * 1024;
pub const AvailableBlockRatio: Perbill = Perbill::one();
}
impl system::Trait for Test {
type Origin = Origin;
type Index = u64;
type BlockNumber = u64;
type Call = ();
type Hash = H256;
type Hashing = BlakeTwo256;
type AccountId = u64;
type Lookup = IdentityLookup<Self::AccountId>;
type Header = Header;
type Event = ();
type BlockHashCount = BlockHashCount;
type MaximumBlockWeight = MaximumBlockWeight;
type AvailableBlockRatio = AvailableBlockRatio;
type MaximumBlockLength = MaximumBlockLength;
type Version = ();
}
parameter_types! {
pub const ExistentialDeposit: u64 = 1;
pub const TransferFee: u64 = 0;
pub const CreationFee: u64 = 0;
}
impl balances::Trait for Test {
type Balance = u64;
type OnNewAccount = ();
type OnFreeBalanceZero = ();
type Event = ();
type TransferPayment = ();
type DustRemoval = ();
type ExistentialDeposit = ExistentialDeposit;
type TransferFee = TransferFee;
type CreationFee = CreationFee;
}
parameter_types! {
pub const ProposalBond: Permill = Permill::from_percent(5);
pub const ProposalBondMinimum: u64 = 1;
pub const SpendPeriod: u64 = 2;
pub const Burn: Permill = Permill::from_percent(50);
}
impl Trait for Test {
type Currency = balances::Module<Test>;
type ApproveOrigin = system::EnsureRoot<u64>;
type RejectOrigin = system::EnsureRoot<u64>;
type Event = ();
type ProposalRejection = ();
type ProposalBond = ProposalBond;
type ProposalBondMinimum = ProposalBondMinimum;
type SpendPeriod = SpendPeriod;
type Burn = Burn;
}
type Balances = balances::Module<Test>;
type Treasury = Module<Test>;
fn new_test_ext() -> runtime_io::TestExternalities {
let mut t = system::GenesisConfig::default().build_storage::<Test>().unwrap();
balances::GenesisConfig::<Test>{
// Total issuance will be 200 with treasury account initialized at ED.
balances: vec![(0, 100), (1, 98), (2, 1)],
vesting: vec![],
}.assimilate_storage(&mut t).unwrap();
GenesisConfig::default().assimilate_storage::<Test>(&mut t).unwrap();
t.into()
}
#[test]
fn genesis_config_works() {
new_test_ext().execute_with(|| {
assert_eq!(Treasury::pot(), 0);
assert_eq!(Treasury::proposal_count(), 0);
});
}
#[test]
fn minting_works() {
new_test_ext().execute_with(|| {
// Check that accumulate works when we have Some value in Dummy already.
Balances::make_free_balance_be(&Treasury::account_id(), 101);
assert_eq!(Treasury::pot(), 100);
});
}
#[test]
fn spend_proposal_takes_min_deposit() {
new_test_ext().execute_with(|| {
assert_ok!(Treasury::propose_spend(Origin::signed(0), 1, 3));
assert_eq!(Balances::free_balance(&0), 99);
assert_eq!(Balances::reserved_balance(&0), 1);
});
}
#[test]
fn spend_proposal_takes_proportional_deposit() {
new_test_ext().execute_with(|| {
assert_ok!(Treasury::propose_spend(Origin::signed(0), 100, 3));
assert_eq!(Balances::free_balance(&0), 95);
assert_eq!(Balances::reserved_balance(&0), 5);
});
}
#[test]
fn spend_proposal_fails_when_proposer_poor() {
new_test_ext().execute_with(|| {
assert_noop!(Treasury::propose_spend(Origin::signed(2), 100, 3), "Proposer's balance too low");
});
}
#[test]
fn accepted_spend_proposal_ignored_outside_spend_period() {
new_test_ext().execute_with(|| {
Balances::make_free_balance_be(&Treasury::account_id(), 101);
assert_ok!(Treasury::propose_spend(Origin::signed(0), 100, 3));
assert_ok!(Treasury::approve_proposal(Origin::ROOT, 0));
<Treasury as OnFinalize<u64>>::on_finalize(1);
assert_eq!(Balances::free_balance(&3), 0);
assert_eq!(Treasury::pot(), 100);
});
}
#[test]
fn unused_pot_should_diminish() {
new_test_ext().execute_with(|| {
let init_total_issuance = Balances::total_issuance();
Balances::make_free_balance_be(&Treasury::account_id(), 101);
assert_eq!(Balances::total_issuance(), init_total_issuance + 100);
<Treasury as OnFinalize<u64>>::on_finalize(2);
assert_eq!(Treasury::pot(), 50);
assert_eq!(Balances::total_issuance(), init_total_issuance + 50);
});
}
#[test]
fn rejected_spend_proposal_ignored_on_spend_period() {
new_test_ext().execute_with(|| {
Balances::make_free_balance_be(&Treasury::account_id(), 101);
assert_ok!(Treasury::propose_spend(Origin::signed(0), 100, 3));
assert_ok!(Treasury::reject_proposal(Origin::ROOT, 0));
<Treasury as OnFinalize<u64>>::on_finalize(2);
assert_eq!(Balances::free_balance(&3), 0);
assert_eq!(Treasury::pot(), 50);
});
}
#[test]
fn reject_already_rejected_spend_proposal_fails() {
new_test_ext().execute_with(|| {
Balances::make_free_balance_be(&Treasury::account_id(), 101);
assert_ok!(Treasury::propose_spend(Origin::signed(0), 100, 3));
assert_ok!(Treasury::reject_proposal(Origin::ROOT, 0));
assert_noop!(Treasury::reject_proposal(Origin::ROOT, 0), "No proposal at that index");
});
}
#[test]
fn reject_non_existant_spend_proposal_fails() {
new_test_ext().execute_with(|| {
assert_noop!(Treasury::reject_proposal(Origin::ROOT, 0), "No proposal at that index");
});
}
#[test]
fn accept_non_existant_spend_proposal_fails() {
new_test_ext().execute_with(|| {
assert_noop!(Treasury::approve_proposal(Origin::ROOT, 0), "No proposal at that index");
});
}
#[test]
fn accept_already_rejected_spend_proposal_fails() {
new_test_ext().execute_with(|| {
Balances::make_free_balance_be(&Treasury::account_id(), 101);
assert_ok!(Treasury::propose_spend(Origin::signed(0), 100, 3));
assert_ok!(Treasury::reject_proposal(Origin::ROOT, 0));
assert_noop!(Treasury::approve_proposal(Origin::ROOT, 0), "No proposal at that index");
});
}
#[test]
fn accepted_spend_proposal_enacted_on_spend_period() {
new_test_ext().execute_with(|| {
Balances::make_free_balance_be(&Treasury::account_id(), 101);
assert_eq!(Treasury::pot(), 100);
assert_ok!(Treasury::propose_spend(Origin::signed(0), 100, 3));
assert_ok!(Treasury::approve_proposal(Origin::ROOT, 0));
<Treasury as OnFinalize<u64>>::on_finalize(2);
assert_eq!(Balances::free_balance(&3), 100);
assert_eq!(Treasury::pot(), 0);
});
}
#[test]
fn pot_underflow_should_not_diminish() {
new_test_ext().execute_with(|| {
Balances::make_free_balance_be(&Treasury::account_id(), 101);
assert_eq!(Treasury::pot(), 100);
assert_ok!(Treasury::propose_spend(Origin::signed(0), 150, 3));
assert_ok!(Treasury::approve_proposal(Origin::ROOT, 0));
<Treasury as OnFinalize<u64>>::on_finalize(2);
assert_eq!(Treasury::pot(), 100); // Pot hasn't changed
let _ = Balances::deposit_into_existing(&Treasury::account_id(), 100).unwrap();
<Treasury as OnFinalize<u64>>::on_finalize(4);
assert_eq!(Balances::free_balance(&3), 150); // Fund has been spent
assert_eq!(Treasury::pot(), 25); // Pot has finally changed
});
}
// Treasury account doesn't get deleted if amount approved to spend is all its free balance.
// i.e. pot should not include existential deposit needed for account survival.
#[test]
fn treasury_account_doesnt_get_deleted() {
new_test_ext().execute_with(|| {
Balances::make_free_balance_be(&Treasury::account_id(), 101);
assert_eq!(Treasury::pot(), 100);
let treasury_balance = Balances::free_balance(&Treasury::account_id());
assert_ok!(Treasury::propose_spend(Origin::signed(0), treasury_balance, 3));
assert_ok!(Treasury::approve_proposal(Origin::ROOT, 0));
<Treasury as OnFinalize<u64>>::on_finalize(2);
assert_eq!(Treasury::pot(), 100); // Pot hasn't changed
assert_ok!(Treasury::propose_spend(Origin::signed(0), Treasury::pot(), 3));
assert_ok!(Treasury::approve_proposal(Origin::ROOT, 1));
<Treasury as OnFinalize<u64>>::on_finalize(4);
assert_eq!(Treasury::pot(), 0); // Pot is emptied
assert_eq!(Balances::free_balance(&Treasury::account_id()), 1); // but the account is still there
});
}
// In case treasury account is not existing then it works fine.
// This is usefull for chain that will just update runtime.
#[test]
fn inexisting_account_works() {
let mut t = system::GenesisConfig::default().build_storage::<Test>().unwrap();
balances::GenesisConfig::<Test>{
balances: vec![(0, 100), (1, 99), (2, 1)],
vesting: vec![],
}.assimilate_storage(&mut t).unwrap();
// Treasury genesis config is not build thus treasury account does not exist
let mut t: runtime_io::TestExternalities = t.into();
t.execute_with(|| {
assert_eq!(Balances::free_balance(&Treasury::account_id()), 0); // Account does not exist
assert_eq!(Treasury::pot(), 0); // Pot is empty
assert_ok!(Treasury::propose_spend(Origin::signed(0), 99, 3));
assert_ok!(Treasury::approve_proposal(Origin::ROOT, 0));
assert_ok!(Treasury::propose_spend(Origin::signed(0), 1, 3));
assert_ok!(Treasury::approve_proposal(Origin::ROOT, 1));
<Treasury as OnFinalize<u64>>::on_finalize(2);
assert_eq!(Treasury::pot(), 0); // Pot hasn't changed
assert_eq!(Balances::free_balance(&3), 0); // Balance of `3` hasn't changed
Balances::make_free_balance_be(&Treasury::account_id(), 100);
assert_eq!(Treasury::pot(), 99); // Pot now contains funds
assert_eq!(Balances::free_balance(&Treasury::account_id()), 100); // Account does exist
<Treasury as OnFinalize<u64>>::on_finalize(4);
assert_eq!(Treasury::pot(), 0); // Pot has changed
assert_eq!(Balances::free_balance(&3), 99); // Balance of `3` has changed
});
}
}