62 lines
1.9 KiB
TypeScript
62 lines
1.9 KiB
TypeScript
// Copyright 2017-2020 @polkadot/react-components 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 React, { useState, useMemo } from 'react';
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import { useApi } from '@polkadot/react-hooks';
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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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help?: 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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}
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const CONVICTIONS: [number, number][] = [1, 2, 4, 8, 16, 32].map((lock, index) => [index + 1, lock]);
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const SEC_DAY = 60 * 60 * 24;
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// REMOVE once Polkadot is upgraded with the correct conviction
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const PERIODS: Record<string, BN> = {
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'0x91b171bb158e2d3848fa23a9f1c25182fb8e20313b2c1eb49219da7a70ce90c3': new BN(403200)
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};
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function AvailableDisplay ({ className = '', help, label, onChange, value }: Props): React.ReactElement<Props> | null {
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const { api } = useApi();
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const { t } = useTranslation();
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const [enact] = useState(
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((PERIODS[api.genesisHash.toHex()] || api.consts.democracy.enactmentPeriod).toNumber() * api.consts.timestamp.minimumPeriod.toNumber() / 1000 * 2) / SEC_DAY
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);
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const convictionOpts = useMemo(() => [
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{ text: t<string>('0.1x voting balance, no lockup period'), value: 0 },
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...CONVICTIONS.map(([value, lock]): { text: string; value: number } => ({
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text: t<string>('{{value}}x voting balance, locked for {{lock}}x enactment ({{period}} days)', {
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replace: {
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lock,
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period: (enact * lock).toFixed(2),
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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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], [t, enact]);
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return (
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<Dropdown
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className={className}
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help={help}
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label={label}
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onChange={onChange}
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options={convictionOpts}
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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(AvailableDisplay);
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