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Introduce ReservableCurrency Trait in Balances Module (#2124)

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* Introduce `ReservableCurrency`

* Update Docs for `ReservableCurrency`

* Update Tests

* Bump spec and rebuild wasm

* Extra: Add a note to `slash()`

Discussion in Riot clarified the behavior of `slash()` and `can_slash()`. Trying to sneak clarifying comments about it into this PR

* Update lib.rs

* Don't drop the periods!

CC @shawntabrizi
This commit is contained in:
Shawn Tabrizi
2019-03-27 16:48:38 +01:00
committed by Gav Wood
parent b32653d0a8
commit 1c1609342c
10 changed files with 66 additions and 50 deletions
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substrate/srml/balances/src/tests.rs
+5 -4
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@@ -23,7 +23,8 @@ use mock::{Balances, ExtBuilder, Runtime, System};
use runtime_io::with_externalities;
use srml_support::{
assert_noop, assert_ok, assert_err,
traits::{LockableCurrency, LockIdentifier, WithdrawReason, WithdrawReasons, Currency, MakePayment}
traits::{LockableCurrency, LockIdentifier, WithdrawReason, WithdrawReasons,
Currency, MakePayment, ReservableCurrency}
};
const ID_1: LockIdentifier = *b"1 ";
@@ -101,17 +102,17 @@ fn lock_reasons_should_work() {
with_externalities(&mut ExtBuilder::default().existential_deposit(1).monied(true).transaction_fees(0, 1).build(), || {
Balances::set_lock(ID_1, &1, 10, u64::max_value(), WithdrawReason::Transfer.into());
assert_noop!(<Balances as Currency<_>>::transfer(&1, &2, 1), "account liquidity restrictions prevent withdrawal");
assert_ok!(<Balances as Currency<_>>::reserve(&1, 1));
assert_ok!(<Balances as ReservableCurrency<_>>::reserve(&1, 1));
assert_ok!(<Balances as MakePayment<_>>::make_payment(&1, 1));
Balances::set_lock(ID_1, &1, 10, u64::max_value(), WithdrawReason::Reserve.into());
assert_ok!(<Balances as Currency<_>>::transfer(&1, &2, 1));
assert_noop!(<Balances as Currency<_>>::reserve(&1, 1), "account liquidity restrictions prevent withdrawal");
assert_noop!(<Balances as ReservableCurrency<_>>::reserve(&1, 1), "account liquidity restrictions prevent withdrawal");
assert_ok!(<Balances as MakePayment<_>>::make_payment(&1, 1));
Balances::set_lock(ID_1, &1, 10, u64::max_value(), WithdrawReason::TransactionPayment.into());
assert_ok!(<Balances as Currency<_>>::transfer(&1, &2, 1));
assert_ok!(<Balances as Currency<_>>::reserve(&1, 1));
assert_ok!(<Balances as ReservableCurrency<_>>::reserve(&1, 1));
assert_noop!(<Balances as MakePayment<_>>::make_payment(&1, 1), "account liquidity restrictions prevent withdrawal");
});
}