Jaco Greeff
66aa38000b
* Derive for democracy locks * Cater for old referendums * Split lock parsing
67 lines
2.5 KiB
TypeScript
67 lines
2.5 KiB
TypeScript
// Copyright 2017-2020 @polkadot/api-derive 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 { AccountId, ReferendumInfo, ReferendumInfoTo239, VotingDirect, VotingDirectVote } from '@polkadot/types/interfaces';
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import { ApiInterfaceRx } from '@polkadot/api/types';
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import { DeriveDemocracyLock } from '../types';
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import BN from 'bn.js';
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import { Observable, of } from 'rxjs';
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import { map, switchMap } from 'rxjs/operators';
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import { Option } from '@polkadot/types';
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import { isUndefined } from '@polkadot/util';
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import { memo } from '../util';
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const LOCKUPS = [0, 1, 2, 4, 8, 16, 32];
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const ZERO = new BN(0);
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function parseLock (api: ApiInterfaceRx, [referendumId, accountVote]: VotingDirectVote, referendum: ReferendumInfo): DeriveDemocracyLock {
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const { balance, vote } = accountVote.asStandard;
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let unlockAt = ZERO;
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if (referendum.isFinished) {
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const { approved, end } = referendum.asFinished;
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if ((approved.isTrue && vote.isAye) || (approved.isFalse && vote.isNay)) {
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unlockAt = end.add(api.consts.democracy.enactmentPeriod.muln(LOCKUPS[vote.conviction.index]));
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}
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}
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return { balance, isFinished: referendum.isFinished, referendumId, unlockAt, vote };
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}
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function directLocks (api: ApiInterfaceRx, { votes }: VotingDirect): Observable<DeriveDemocracyLock[]> {
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if (!votes.length) {
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return of([]);
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}
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return api.query.democracy.referendumInfoOf.multi<Option<ReferendumInfo | ReferendumInfoTo239>>(votes.map(([referendumId]) => referendumId)).pipe(
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map((referendums) =>
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votes
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.map((vote, index): [VotingDirectVote, ReferendumInfo | ReferendumInfoTo239 | null] =>
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[vote, referendums[index].unwrapOr(null)]
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)
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.filter((item): item is [VotingDirectVote, ReferendumInfo] =>
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!!item[1] && isUndefined((item[1] as ReferendumInfoTo239).end) && item[0][1].isStandard
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)
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.map(([directVote, referendum]) =>
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parseLock(api, directVote, referendum)
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)
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)
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);
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}
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export function locks (api: ApiInterfaceRx): (accountId: string | AccountId) => Observable<DeriveDemocracyLock[]> {
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return memo((accountId: string | AccountId): Observable<DeriveDemocracyLock[]> =>
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api.query.democracy.votingOf(accountId).pipe(
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switchMap((voting): Observable<DeriveDemocracyLock[]> =>
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voting.isDirect
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? directLocks(api, voting.asDirect)
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: of([])
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)
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)
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);
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}
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