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srml-staking: Force minimum bond amount + proper cleanup. (#3048)

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* enforce minimum bond amount.

* Bump.

* Improve doc.

* Update srml/staking/src/lib.rs

Co-Authored-By: Shawn Tabrizi <shawntabrizi@gmail.com>

* Update srml/staking/src/lib.rs

Co-Authored-By: Gavin Wood <gavin@parity.io>

* Doc update.
This commit is contained in:
Kian Peymani
2019-07-10 17:49:16 +02:00
committed by Gavin Wood
parent 0feb91d045
commit ddfc761dbf
3 changed files with 73 additions and 59 deletions
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substrate/srml/staking/src/tests.rs
+29 -42
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@@ -1714,59 +1714,46 @@ fn bond_with_no_staked_value() {
// Particularly when she votes and the candidate is elected.
with_externalities(&mut ExtBuilder::default()
.validator_count(3)
.existential_deposit(5)
.nominate(false)
.minimum_validator_count(1)
.build(), || {
// setup
assert_ok!(Staking::set_payee(Origin::signed(10), RewardDestination::Controller));
let _ = Balances::deposit_creating(&3, 1000);
let initial_balance_2 = Balances::free_balance(&2);
let initial_balance_4 = Balances::free_balance(&4);
// Can't bond with 1
assert_noop!(
Staking::bond(Origin::signed(1), 2, 1, RewardDestination::Controller),
"can not bond with value less than minimum balance"
);
// bonded with absolute minimum value possible.
assert_ok!(Staking::bond(Origin::signed(1), 2, 5, RewardDestination::Controller));
assert_eq!(Balances::locks(&1)[0].amount, 5);
// Stingy validator.
assert_ok!(Staking::bond(Origin::signed(1), 2, 1, RewardDestination::Controller));
assert_ok!(Staking::validate(Origin::signed(2), ValidatorPrefs::default()));
// unbonding even 1 will cause all to be unbonded.
assert_ok!(Staking::unbond(Origin::signed(2), 1));
assert_eq!(
Staking::ledger(2),
Some(StakingLedger {
stash: 1,
active: 0,
total: 5,
unlocking: vec![UnlockChunk {value: 5, era: 3}]
})
);
start_era(1);
assert_eq_uvec!(validator_controllers(), vec![30, 20, 10]);
// min of 10, 20 and 30 (30 got a payout into staking so it raised it from 1 to 31).
assert_eq!(Staking::slot_stake(), 31);
// make the stingy one elected.
assert_ok!(Staking::bond(Origin::signed(3), 4, 500, RewardDestination::Controller));
assert_ok!(Staking::nominate(Origin::signed(4), vec![1]));
// no rewards paid to 2 and 4 yet
assert_eq!(Balances::free_balance(&2), initial_balance_2);
assert_eq!(Balances::free_balance(&4), initial_balance_4);
start_era(2);
// Stingy one is selected
assert_eq_uvec!(validator_controllers(), vec![20, 10, 2]);
assert_eq!(Staking::stakers(1), Exposure {
own: 1,
total: 501,
others: vec![IndividualExposure { who: 3, value: 500}],
});
// New slot stake.
assert_eq!(Staking::slot_stake(), 501);
// no rewards paid to 2 and 4 yet
assert_eq!(Balances::free_balance(&2), initial_balance_2);
assert_eq!(Balances::free_balance(&4), initial_balance_4);
// not yet removed.
assert_ok!(Staking::withdraw_unbonded(Origin::signed(2)));
assert!(Staking::ledger(2).is_some());
assert_eq!(Balances::locks(&1)[0].amount, 5);
start_era(3);
// Approximation resulting from Perbill conversion
let approximation = 1;
let reward = Staking::current_session_reward() * 3;
// 2 will not get a reward of only 1
// 4 will get the rest
assert_eq!(Balances::free_balance(&2), initial_balance_2 + 3 - approximation);
assert_eq!(Balances::free_balance(&4), initial_balance_4 + reward - 3 - approximation);
// poof. Account 1 is removed from the staking system.
assert_ok!(Staking::withdraw_unbonded(Origin::signed(2)));
assert!(Staking::ledger(2).is_none());
assert_eq!(Balances::locks(&1).len(), 0);
});
}