f5832feb02
* Add KULUPU_GENESIS constant * Add Kulupu-specific thresholds * Add support for targetBlockTime * Styling fix * Init Kulupu logo * Fix endpoint icon for Kulupu * Fix linting
37 lines
1.0 KiB
TypeScript
37 lines
1.0 KiB
TypeScript
// Copyright 2017-2020 @polkadot/app-democracy 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 BN from 'bn.js';
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import { useMemo } from 'react';
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import { timeToString } from '@polkadot/react-components/util';
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import { useApi } from '@polkadot/react-hooks';
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import { BN_ONE, extractTime } from '@polkadot/util';
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import { useTranslation } from './translate';
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type Result = [number, string];
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const DEFAULT_TIME = new BN(6000);
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export default function useBlockTime (blocks = BN_ONE): Result {
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const { t } = useTranslation();
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const { api } = useApi();
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return useMemo(
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(): Result => {
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const blockTime = (
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api.consts.babe?.expectedBlockTime ||
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api.consts.difficulty?.targetBlockTime ||
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api.consts.timestamp?.minimumPeriod.muln(2) ||
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DEFAULT_TIME
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);
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return [
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blockTime.toNumber(),
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timeToString(t, extractTime(blockTime.mul(blocks).toNumber()))
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];
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},
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[api, blocks, t]
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);
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}
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