23 lines
920 B
TypeScript
23 lines
920 B
TypeScript
// Copyright 2017-2023 @polkadot/api-derive authors & contributors
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// SPDX-License-Identifier: Apache-2.0
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import type { Observable } from 'rxjs';
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import type { AccountId, AccountIndex, Address } from '@polkadot/types/interfaces';
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import type { DeriveApi, DeriveBalancesAccount } from '../types.js';
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import { combineLatest, of } from 'rxjs';
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import { memo } from '../util/index.js';
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export function votingBalances (instanceId: string, api: DeriveApi): (addresses?: (AccountId | AccountIndex | Address | string)[]) => Observable<DeriveBalancesAccount[]> {
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return memo(instanceId, (addresses?: (AccountId | AccountIndex | Address | string)[]): Observable<DeriveBalancesAccount[]> =>
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!addresses?.length
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? of([] as DeriveBalancesAccount[])
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: combineLatest(
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addresses.map((accountId): Observable<DeriveBalancesAccount> =>
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api.derive.balances.account(accountId)
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)
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)
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);
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}
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