63 lines
1.9 KiB
TypeScript
63 lines
1.9 KiB
TypeScript
// Copyright 2017-2020 @polkadot/react-hooks 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 { BlockNumber, Votes } from '@polkadot/types/interfaces';
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import BN from 'bn.js';
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import { useMemo } from 'react';
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import { ApiPromise } from '@polkadot/api';
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import useApi from './useApi';
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import useCall from './useCall';
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interface State {
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hasFailed: boolean;
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hasPassed: boolean;
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isCloseable: boolean;
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isVoteable: boolean;
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remainingBlocks: BN | null;
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}
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const DEFAULT_STATUS = { hasFailed: false, hasPassed: false, isCloseable: false, isVoteable: false, remainingBlocks: null };
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function getStatus (api: ApiPromise, bestNumber: BlockNumber, votes: Votes, numMembers: number, section: 'council' | 'technicalCommittee'): State {
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if (!votes.end) {
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return {
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hasFailed: false,
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hasPassed: false,
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isCloseable: false,
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isVoteable: true,
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remainingBlocks: null
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};
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}
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const isEnd = bestNumber.gte(votes.end);
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const hasPassed = votes.threshold.lten(votes.ayes.length);
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const hasFailed = votes.threshold.gtn(Math.abs(numMembers - votes.nays.length));
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return {
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hasFailed,
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hasPassed,
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isCloseable: api.tx[section].close?.meta.args.length === 4 // current-generation
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? isEnd || hasPassed || hasFailed
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: isEnd,
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isVoteable: !isEnd,
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remainingBlocks: isEnd
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? null
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: votes.end.sub(bestNumber)
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};
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}
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export default function useVotingStatus (votes: Votes | null | undefined, numMembers: number, section: 'council' | 'technicalCommittee'): State {
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const { api } = useApi();
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const bestNumber = useCall<BlockNumber>(api.derive.chain.bestNumber);
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return useMemo(
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() => bestNumber && votes
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? getStatus(api, bestNumber, votes, numMembers, section)
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: DEFAULT_STATUS,
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[api, bestNumber, numMembers, section, votes]
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);
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}
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