60 lines
1.9 KiB
TypeScript
60 lines
1.9 KiB
TypeScript
// Copyright 2017-2023 @polkadot/react-components authors & contributors
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// SPDX-License-Identifier: Apache-2.0
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import type { TFunction } from 'i18next';
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import React, { useRef } from 'react';
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import { useBlockInterval } from '@polkadot/react-hooks';
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import { calcBlockTime } from '@polkadot/react-hooks/useBlockTime';
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import { BN, BN_ZERO } from '@polkadot/util';
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import Dropdown from './Dropdown';
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import { useTranslation } from './translate';
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export interface Props {
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className?: string;
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label?: React.ReactNode;
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onChange?: (value: number) => void;
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value?: number;
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voteLockingPeriod: BN;
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}
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const CONVICTIONS = [1, 2, 4, 8, 16, 32].map((lock, index): [value: number, duration: number, durationBn: BN] => [index + 1, lock, new BN(lock)]);
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function createOptions (blockTime: BN, voteLockingPeriod: BN, t: TFunction): { text: string; value: number }[] {
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return [
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{ text: t<string>('0.1x voting balance, no lockup period'), value: 0 },
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...CONVICTIONS.map(([value, duration, durationBn]): { text: string; value: number } => ({
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text: t<string>('{{value}}x voting balance, locked for {{duration}}x duration{{period}}', {
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replace: {
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duration,
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period: voteLockingPeriod && voteLockingPeriod.gt(BN_ZERO)
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? ` (${calcBlockTime(blockTime, durationBn.mul(voteLockingPeriod), t)[1]})`
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: '',
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value
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}
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}),
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value
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}))
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];
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}
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function Convictions ({ className = '', label, onChange, value, voteLockingPeriod }: Props): React.ReactElement<Props> | null {
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const { t } = useTranslation();
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const blockTime = useBlockInterval();
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const optionsRef = useRef(createOptions(blockTime, voteLockingPeriod, t));
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return (
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<Dropdown
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className={className}
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label={label}
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onChange={onChange}
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options={optionsRef.current}
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value={value}
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/>
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);
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}
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export default React.memo(Convictions);
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