|
|
@@ -0,0 +1,41 @@
|
|
|
+use frame_support::dispatch::DispatchResult;
|
|
|
+
|
|
|
+// Type alias for member id.
|
|
|
+pub type MemberId<T> = <T as membership::Trait>::MemberId;
|
|
|
+
|
|
|
+/// Balance alias for `balances` module.
|
|
|
+pub type BalanceOf<T> = <T as balances::Trait>::Balance;
|
|
|
+
|
|
|
+/// Defines abstract staking handler to manage user stakes for different activities
|
|
|
+/// like adding a proposal. Implementation should use built-in LockableCurrency
|
|
|
+/// and LockIdentifier to lock balance consistently with pallet_staking.
|
|
|
+pub trait StakingHandler<T: frame_system::Trait + membership::Trait + balances::Trait> {
|
|
|
+ /// Locks the specified balance on the account using specific lock identifier.
|
|
|
+ fn lock(account_id: &T::AccountId, amount: BalanceOf<T>);
|
|
|
+
|
|
|
+ /// Removes the specified lock on the account.
|
|
|
+ fn unlock(account_id: &T::AccountId);
|
|
|
+
|
|
|
+ /// Slash the specified balance on the account using specific lock identifier.
|
|
|
+ /// No limits, no actions on zero stake.
|
|
|
+ /// If slashing balance greater than the existing stake - stake is slashed to zero.
|
|
|
+ /// Returns actually slashed balance.
|
|
|
+ fn slash(account_id: &T::AccountId, amount: Option<BalanceOf<T>>) -> BalanceOf<T>;
|
|
|
+
|
|
|
+ /// Sets the new stake to a given amount.
|
|
|
+ fn set_stake(account_id: &T::AccountId, new_stake: BalanceOf<T>) -> DispatchResult;
|
|
|
+
|
|
|
+ /// Verifies that staking account bound to the member.
|
|
|
+ fn is_member_staking_account(member_id: &MemberId<T>, account_id: &T::AccountId) -> bool;
|
|
|
+
|
|
|
+ /// Verifies that there no conflicting stakes on the staking account.
|
|
|
+ fn is_account_free_of_conflicting_stakes(account_id: &T::AccountId) -> bool;
|
|
|
+
|
|
|
+ /// Verifies that staking account balance is sufficient for staking.
|
|
|
+ /// During the balance check we should consider already locked stake. Effective balance to check
|
|
|
+ /// is 'already locked funds' + 'usable funds'.
|
|
|
+ fn is_enough_balance_for_stake(account_id: &T::AccountId, amount: BalanceOf<T>) -> bool;
|
|
|
+
|
|
|
+ /// Returns the current stake on the account.
|
|
|
+ fn current_stake(account_id: &T::AccountId) -> BalanceOf<T>;
|
|
|
+}
|
Shamil Gadelshin