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Improve fees module (#1821)

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* remove amount associated
* make a new trait to bound some arithmetics to balances or assets:
  It also remove arithmetic bounds of srml-support::traits::Currency.

  To update your code then use srml_support::traits::ArithmeticType like:
  `type Currency: ArithmeticType + Currency<Self::AccountId, Balance=BalanceOf<Self>>; ` 
  with `type BalanceOf<T> = <<T as Trait>::Currency as ArithmeticType>::Type; `

* improve decl_storage when it explicit serde bound: basically don't try to be smarter than rust and just use where clause.
This commit is contained in:
thiolliere
2019-02-19 17:13:59 +01:00
committed by GitHub
parent 9a2f1b2007
commit 8065116ba5
16 changed files with 48 additions and 100 deletions
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substrate/srml/staking/src/lib.rs
+3 -3
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@@ -25,7 +25,7 @@ use parity_codec::HasCompact;
use parity_codec_derive::{Encode, Decode};
use srml_support::{Parameter, StorageValue, StorageMap, dispatch::Result};
use srml_support::{decl_module, decl_event, decl_storage, ensure};
use srml_support::traits::{Currency, OnDilution, EnsureAccountLiquid, OnFreeBalanceZero};
use srml_support::traits::{Currency, OnDilution, EnsureAccountLiquid, OnFreeBalanceZero, ArithmeticType};
use session::OnSessionChange;
use primitives::Perbill;
use primitives::traits::{Zero, One, Bounded, As, StaticLookup};
@@ -67,11 +67,11 @@ impl<B: Default + HasCompact + Copy> Default for ValidatorPrefs<B> {
}
}
type BalanceOf<T> = <<T as Trait>::Currency as Currency<<T as system::Trait>::AccountId>>::Balance;
type BalanceOf<T> = <<T as Trait>::Currency as ArithmeticType>::Type;
pub trait Trait: system::Trait + session::Trait {
/// The staking balance.
type Currency: Currency<Self::AccountId>;
type Currency: ArithmeticType + Currency<Self::AccountId, Balance=BalanceOf<Self>>;
/// Some tokens minted.
type OnRewardMinted: OnDilution<BalanceOf<Self>>;