eacf028ba6
* Use .js imports in src * Additional * Additional * Additional * Additional * Additional * Additional * Additional * Additional * Additional * Additional * Additional * Additional * Additional * Add WP extension aliases * Bump dev * Additional * Additional * Adjust extensionAlias order
38 lines
1.2 KiB
TypeScript
38 lines
1.2 KiB
TypeScript
// Copyright 2017-2023 @polkadot/app-staking authors & contributors
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// SPDX-License-Identifier: Apache-2.0
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import type { Option, u32 } from '@polkadot/types';
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import type { PalletStakingActiveEraInfo } from '@polkadot/types/lookup';
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import type { BN } from '@polkadot/util';
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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, useCall } from '@polkadot/react-hooks';
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const OPT_ACTIVEERA = {
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transform: (activeEra: Option<PalletStakingActiveEraInfo>): BN | null =>
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activeEra.isSome
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? activeEra.unwrap().index
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: null
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};
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const OPT_CURRENTERA = {
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transform: (currentEra: Option<u32>): BN | null =>
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currentEra.unwrapOr(null)
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};
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function useSessionInfoImpl (): SessionInfo {
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const { api } = useApi();
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const activeEra = useCall(api.query.staking.activeEra, undefined, OPT_ACTIVEERA);
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const currentEra = useCall(api.query.staking.currentEra, undefined, OPT_CURRENTERA);
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const currentSession = useCall<u32>(api.query.session.currentIndex);
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return useMemo(
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() => ({ activeEra, currentEra, currentSession }),
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[activeEra, currentEra, currentSession]
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);
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}
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export default createNamedHook('useSessionInfo', useSessionInfoImpl);
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