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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/treasury/src/lib.rs
+2 -2
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@@ -22,7 +22,7 @@
use serde_derive::{Serialize, Deserialize};
use rstd::prelude::*;
use srml_support::{StorageValue, StorageMap, decl_module, decl_storage, decl_event, ensure};
use srml_support::traits::{Currency, OnDilution, OnUnbalanced, Imbalance};
use srml_support::traits::{Currency, ReservableCurrency, OnDilution, OnUnbalanced, Imbalance};
use runtime_primitives::{Permill, traits::{Zero, EnsureOrigin, StaticLookup}};
use parity_codec::{Encode, Decode};
use system::ensure_signed;
@@ -33,7 +33,7 @@ type NegativeImbalanceOf<T> = <<T as Trait>::Currency as Currency<<T as system::
pub trait Trait: system::Trait {
/// The staking balance.
type Currency: Currency<Self::AccountId>;
type Currency: Currency<Self::AccountId> + ReservableCurrency<Self::AccountId>;
/// Origin from which approvals must come.
type ApproveOrigin: EnsureOrigin<Self::Origin>;