37 lines
1.0 KiB
TypeScript
37 lines
1.0 KiB
TypeScript
// Copyright 2017-2020 @polkadot/react-query authors & contributors
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// This software may be modified and distributed under the terms
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// of the Apache-2.0 license. See the LICENSE file for details.
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import { BareProps } from '@polkadot/react-api/types';
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import { BlockNumber } from '@polkadot/types/interfaces';
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import React from 'react';
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import { useApi, useCall } from '@polkadot/react-hooks';
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import { formatNumber } from '@polkadot/util';
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interface Props extends BareProps {
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children?: React.ReactNode;
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label?: React.ReactNode;
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withPound?: boolean;
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}
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function BestNumber ({ children, className, label, style, withPound }: Props): React.ReactElement<Props> {
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const { api, isApiReady } = useApi();
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const bestNumber = useCall<BlockNumber>(isApiReady && api.derive.chain.bestNumber, []);
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return (
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<div
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className={className}
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style={style}
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>
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{label || ''}{withPound && '#'}{
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bestNumber
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? formatNumber(bestNumber)
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: '-'
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}{children}
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</div>
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);
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}
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export default React.memo(BestNumber);
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