97 lines
3.3 KiB
TypeScript
97 lines
3.3 KiB
TypeScript
// Copyright 2017-2020 @polkadot/app-staking 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 { DeriveEraRewards, DeriveOwnSlashes, DeriveStakerPoints } from '@polkadot/api-derive/types';
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import { ChartInfo, LineDataEntry, Props } from './types';
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import BN from 'bn.js';
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import React, { useEffect, useMemo, useState } from 'react';
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import { Chart, Spinner } from '@polkadot/react-components';
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import { useApi, useCall } from '@polkadot/react-hooks';
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import { formatBalance } from '@polkadot/util';
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import { useTranslation } from '../translate';
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import { balanceToNumber } from './util';
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const COLORS_REWARD = ['#8c2200', '#008c22', '#acacac'];
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function extractRewards (erasRewards: DeriveEraRewards[], ownSlashes: DeriveOwnSlashes[], allPoints: DeriveStakerPoints[], divisor: BN): ChartInfo {
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const labels: string[] = [];
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const slashSet: LineDataEntry = [];
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const rewardSet: LineDataEntry = [];
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const avgSet: LineDataEntry = [];
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let avgCount = 0;
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let total = 0;
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erasRewards.forEach(({ era, eraReward }): void => {
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const points = allPoints.find((points) => points.era.eq(era));
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const slashed = ownSlashes.find((slash) => slash.era.eq(era));
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const reward = points?.eraPoints.gtn(0)
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? balanceToNumber(points.points.mul(eraReward).div(points.eraPoints), divisor)
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: 0;
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const slash = slashed
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? balanceToNumber(slashed.total, divisor)
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: 0;
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total += reward;
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if (reward > 0) {
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avgCount++;
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}
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labels.push(era.toHuman());
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rewardSet.push(reward);
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avgSet.push((avgCount ? Math.ceil(total * 100 / avgCount) : 0) / 100);
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slashSet.push(slash);
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});
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return {
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chart: [slashSet, rewardSet, avgSet],
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labels
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};
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}
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function ChartRewards ({ validatorId }: Props): React.ReactElement<Props> {
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const { t } = useTranslation();
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const { api } = useApi();
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const [{ chart, labels }, setChart] = useState<ChartInfo>({ chart: [], labels: [] });
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const ownSlashes = useCall<DeriveOwnSlashes[]>(api.derive.staking.ownSlashes as any, [validatorId, true]);
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const erasRewards = useCall<DeriveEraRewards[]>(api.derive.staking.erasRewards as any, []);
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const stakerPoints = useCall<DeriveStakerPoints[]>(api.derive.staking.stakerPoints as any, [validatorId, true]);
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const { currency, divisor } = useMemo((): { currency: string; divisor: BN } => ({
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currency: formatBalance.getDefaults().unit,
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divisor: new BN('1'.padEnd(formatBalance.getDefaults().decimals + 1, '0'))
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}), []);
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const legends = useMemo(() => [
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t('{{currency}} slashed', { replace: { currency } }),
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t('{{currency}} rewards', { replace: { currency } }),
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t('{{currency}} average', { replace: { currency } })
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], [currency, t]);
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useEffect((): void => {
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erasRewards && ownSlashes && stakerPoints && setChart(
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extractRewards(erasRewards, ownSlashes, stakerPoints, divisor)
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);
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}, [divisor, erasRewards, ownSlashes, stakerPoints]);
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return (
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<div className='staking--Chart'>
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<h1>{t('rewards & slashes')}</h1>
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{chart.length
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? (
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<Chart.Line
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colors={COLORS_REWARD}
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labels={labels}
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legends={legends}
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values={chart}
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/>
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)
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: <Spinner />
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}
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</div>
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);
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}
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export default React.memo(ChartRewards);
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