21 lines
605 B
TypeScript
21 lines
605 B
TypeScript
// Copyright 2017-2021 @polkadot/react-hooks authors & contributors
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// SPDX-License-Identifier: Apache-2.0
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import type { Header } from '@polkadot/types/interfaces';
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import { createNamedHook } from './createNamedHook';
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import { useApi } from './useApi';
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import { useCall } from './useCall';
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const optCall = {
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transform: (header: Header) => header.hash.toHex()
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};
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function useBestHashImpl (): string | undefined {
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const { api } = useApi();
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return useCall<string>(api.rpc.chain.subscribeNewHeads, undefined, optCall);
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}
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export const useBestHash = createNamedHook('useBestHash', useBestHashImpl);
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