frame_support/traits/tokens/stable.rs
1// This file is part of Substrate.
2
3// Copyright (C) Amforc AG.
4// SPDX-License-Identifier: Apache-2.0
5
6// Licensed under the Apache License, Version 2.0 (the "License");
7// you may not use this file except in compliance with the License.
8// You may obtain a copy of the License at
9//
10// http://www.apache.org/licenses/LICENSE-2.0
11//
12// Unless required by applicable law or agreed to in writing, software
13// distributed under the License is distributed on an "AS IS" BASIS,
14// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15// See the License for the specific language governing permissions and
16// limitations under the License.
17
18//! Traits for stablecoin inter-pallet communication.
19
20/// Trait exposing the PSM pallet's reserved capacity to other pallets.
21///
22/// Implemented by the PSM pallet, used by the Vaults pallet to account for
23/// PSM-reserved debt ceiling when calculating available vault capacity.
24pub trait PsmInterface {
25 /// The balance type.
26 type Balance;
27
28 /// Get the amount of internal/minting stablecoin issuance capacity reserved by the PSM.
29 fn reserved_capacity() -> Self::Balance;
30}
31
32impl PsmInterface for () {
33 type Balance = u128;
34
35 fn reserved_capacity() -> Self::Balance {
36 0
37 }
38}