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Move balance tracker inside accumulator
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chainstate/constraints-value-accumulator/src/accounts_balances_tracker.rs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,88 @@ | ||
| // Copyright (c) 2024 RBB S.r.l | ||
| // [email protected] | ||
| // SPDX-License-Identifier: MIT | ||
| // Licensed under the MIT License; | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // https://github.com/mintlayer/mintlayer-core/blob/master/LICENSE | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
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| use std::collections::{btree_map::Entry, BTreeMap}; | ||
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| use common::{ | ||
| chain::{AccountSpending, AccountType, DelegationId}, | ||
| primitives::Amount, | ||
| }; | ||
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| use crate::Error; | ||
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| #[derive(Copy, Clone, Eq, PartialEq, Ord, PartialOrd)] | ||
| enum GenericAccountId { | ||
| Delegation(DelegationId), | ||
| } | ||
|
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| impl From<AccountSpending> for GenericAccountId { | ||
| fn from(account: AccountSpending) -> Self { | ||
| match account { | ||
| AccountSpending::DelegationBalance(id, _) => Self::Delegation(id), | ||
| } | ||
| } | ||
| } | ||
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| impl From<GenericAccountId> for AccountType { | ||
| fn from(value: GenericAccountId) -> Self { | ||
| match value { | ||
| GenericAccountId::Delegation(id) => AccountType::Delegation(id), | ||
| } | ||
| } | ||
| } | ||
|
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| pub struct AccountsBalancesTracker<'a, DelegationBalanceGetterFn> { | ||
| balances: BTreeMap<GenericAccountId, Amount>, | ||
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| delegation_balance_getter: &'a DelegationBalanceGetterFn, | ||
| } | ||
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| impl<'a, DelegationBalanceGetterFn> AccountsBalancesTracker<'a, DelegationBalanceGetterFn> | ||
| where | ||
| DelegationBalanceGetterFn: Fn(DelegationId) -> Result<Option<Amount>, Error>, | ||
| { | ||
| pub fn new(delegation_balance_getter: &'a DelegationBalanceGetterFn) -> Self { | ||
| Self { | ||
| balances: BTreeMap::new(), | ||
| delegation_balance_getter, | ||
| } | ||
| } | ||
|
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| pub fn spend_from_account(&mut self, account: AccountSpending) -> Result<(), Error> { | ||
| match self.balances.entry(account.clone().into()) { | ||
| Entry::Vacant(e) => { | ||
| let (balance, spending) = match account { | ||
| AccountSpending::DelegationBalance(id, spending) => { | ||
| let balance = (self.delegation_balance_getter)(id)? | ||
| .ok_or(Error::AccountBalanceNotFound(account.clone().into()))?; | ||
| (balance, spending) | ||
| } | ||
| }; | ||
| let new_balance = (balance - spending) | ||
| .ok_or(Error::NegativeAccountBalance(account.clone().into()))?; | ||
| e.insert(new_balance); | ||
| } | ||
| Entry::Occupied(mut e) => { | ||
| let balance = e.get_mut(); | ||
| let spending = match account { | ||
| AccountSpending::DelegationBalance(_, spending) => spending, | ||
| }; | ||
| *balance = (*balance - spending) | ||
| .ok_or(Error::NegativeAccountBalance(account.clone().into()))?; | ||
| } | ||
| }; | ||
| Ok(()) | ||
| } | ||
| } |
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