35 lines
1.0 KiB
TypeScript
35 lines
1.0 KiB
TypeScript
// Copyright 2017-2025 @polkadot/app-staking authors & contributors
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// SPDX-License-Identifier: Apache-2.0
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import type { StorageKey, u32 } from '@polkadot/types';
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import type { AccountId32 } from '@polkadot/types/interfaces';
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import type { SessionInfo } from './types.js';
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import { useMemo } from 'react';
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import { createNamedHook, useApi, useMapKeys } from '@polkadot/react-hooks';
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import { useCacheValue } from './useCache.js';
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const OPT_ELECTED = {
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transform: (keys: StorageKey<[u32, AccountId32]>[]): string[] =>
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keys.map(({ args: [, stashId] }) =>
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stashId.toString()
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)
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};
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function useElectedValidatorsImpl ({ currentEra }: SessionInfo): string[] | undefined {
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const { api } = useApi();
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const electedParams = useMemo(
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() => currentEra && [currentEra],
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[currentEra]
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);
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const elected = useMapKeys(electedParams && api.query.staking.erasStakers, electedParams, OPT_ELECTED);
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return useCacheValue('useElectedValidators', elected);
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}
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export default createNamedHook('useElectedValidators', useElectedValidatorsImpl);
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