Add remove_proxies API for pallet-proxies #7557 (#12714)

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Add remove_proxies API for pallet-proxies
#7557

* added remove_all_proxy_delegates method

* remove all proxy implementation

* remove_all_proxy_delegate

* reverted changes

* fixed 7557

* fixed warnings

* removed println! causing build failure on ci/cd pipelines

* incorporated suggested changes

* minor change

* made suggested changes

* method comment

* Update frame/proxy/src/lib.rs

---------

Co-authored-by: Juan <juangirini@gmail.com>
Co-authored-by: parity-processbot <>

frame/proxy/src/lib.rs

@@ -40,7 +40,8 @@ use frame_support::{
 	traits::{Currency, Get, InstanceFilter, IsSubType, IsType, OriginTrait, ReservableCurrency},
 	RuntimeDebug,
 };
-use frame_system::{self as system};
+use frame_system::{self as system, ensure_signed};
+pub use pallet::*;
 use scale_info::TypeInfo;
 use sp_io::hashing::blake2_256;
 use sp_runtime::{
@@ -50,8 +51,6 @@ use sp_runtime::{
 use sp_std::prelude::*;
 pub use weights::WeightInfo;
 
-pub use pallet::*;
-
 type CallHashOf<T> = <<T as Config>::CallHasher as Hash>::Output;
 
 type BalanceOf<T> =
@@ -265,9 +264,7 @@ pub mod pallet {
 		#[pallet::weight(T::WeightInfo::remove_proxies(T::MaxProxies::get()))]
 		pub fn remove_proxies(origin: OriginFor<T>) -> DispatchResult {
 			let who = ensure_signed(origin)?;
-			let (_, old_deposit) = Proxies::<T>::take(&who);
-			T::Currency::unreserve(&who, old_deposit);
-
+			Self::remove_all_proxy_delegates(&who);
 			Ok(())
 		}
 
@@ -799,4 +796,13 @@ impl<T: Config> Pallet<T> {
 		let e = call.dispatch(origin);
 		Self::deposit_event(Event::ProxyExecuted { result: e.map(|_| ()).map_err(|e| e.error) });
 	}
+
+	/// Removes all proxy delegates for a given delegator.
+	///
+	/// Parameters:
+	/// - `delegator`: The delegator account.
+	pub fn remove_all_proxy_delegates(delegator: &T::AccountId) {
+		let (_, old_deposit) = Proxies::<T>::take(&delegator);
+		T::Currency::unreserve(&delegator, old_deposit);
+	}
 }