Crowdloans (#4613)

* Crowdloans

* update icon

* crowdloads -> crowdloan

* Overview start

* Fund indexes

* Fund displays stucture

* Fund view

* Fund view expanded

* Update packages/page-crowdloan/src/useFundIndexes.ts

* Add skeleton

* useEventTrigger

* Cleanups

* Fund proposal

* Registrar

* Adjust current versions

* Update README.md

packages/apps-routing/src/crowdloan.ts

@@ -0,0 +1,22 @@
+// Copyright 2017-2021 @polkadot/apps-routing authors & contributors
+// SPDX-License-Identifier: Apache-2.0
+
+import type { TFunction } from 'i18next';
+import type { Route } from './types';
+
+import Component from '@polkadot/app-crowdloan';
+
+export default function create (t: TFunction): Route {
+  return {
+    Component,
+    display: {
+      needsApi: [
+        'query.crowdloan.funds'
+      ]
+    },
+    group: 'network',
+    icon: 'coins',
+    name: 'crowdloan',
+    text: t('nav.crowdloan', 'Crowdloan', { ns: 'apps-routing' })
+  };
+}

packages/apps-routing/src/index.ts

@@ -11,6 +11,7 @@ import calendar from './calendar';
 import claims from './claims';
 import contracts from './contracts';
 import council from './council';
+import crowdloan from './crowdloan';
 import democracy from './democracy';
 import explorer from './explorer';
 import extrinsics from './extrinsics';
@@ -43,6 +44,7 @@ export default function create (t: TFunction): Routes {
     bounties(t),
     techcomm(t),
     parachains(t),
+    crowdloan(t),
     society(t),
     calendar(t),
     contracts(t),

packages/page-crowdloan/LICENSE

@@ -0,0 +1,201 @@
+                              Apache License
+                        Version 2.0, January 2004
+                    http://www.apache.org/licenses/
+
+TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+1. Definitions.
+
+  "License" shall mean the terms and conditions for use, reproduction,
+  and distribution as defined by Sections 1 through 9 of this document.
+
+  "Licensor" shall mean the copyright owner or entity authorized by
+  the copyright owner that is granting the License.
+
+  "Legal Entity" shall mean the union of the acting entity and all
+  other entities that control, are controlled by, or are under common
+  control with that entity. For the purposes of this definition,
+  "control" means (i) the power, direct or indirect, to cause the
+  direction or management of such entity, whether by contract or
+  otherwise, or (ii) ownership of fifty percent (50%) or more of the
+  outstanding shares, or (iii) beneficial ownership of such entity.
+
+  "You" (or "Your") shall mean an individual or Legal Entity
+  exercising permissions granted by this License.
+
+  "Source" form shall mean the preferred form for making modifications,
+  including but not limited to software source code, documentation
+  source, and configuration files.
+
+  "Object" form shall mean any form resulting from mechanical
+  transformation or translation of a Source form, including but
+  not limited to compiled object code, generated documentation,
+  and conversions to other media types.
+
+  "Work" shall mean the work of authorship, whether in Source or
+  Object form, made available under the License, as indicated by a
+  copyright notice that is included in or attached to the work
+  (an example is provided in the Appendix below).
+
+  "Derivative Works" shall mean any work, whether in Source or Object
+  form, that is based on (or derived from) the Work and for which the
+  editorial revisions, annotations, elaborations, or other modifications
+  represent, as a whole, an original work of authorship. For the purposes
+  of this License, Derivative Works shall not include works that remain
+  separable from, or merely link (or bind by name) to the interfaces of,
+  the Work and Derivative Works thereof.
+
+  "Contribution" shall mean any work of authorship, including
+  the original version of the Work and any modifications or additions
+  to that Work or Derivative Works thereof, that is intentionally
+  submitted to Licensor for inclusion in the Work by the copyright owner
+  or by an individual or Legal Entity authorized to submit on behalf of
+  the copyright owner. For the purposes of this definition, "submitted"
+  means any form of electronic, verbal, or written communication sent
+  to the Licensor or its representatives, including but not limited to
+  communication on electronic mailing lists, source code control systems,
+  and issue tracking systems that are managed by, or on behalf of, the
+  Licensor for the purpose of discussing and improving the Work, but
+  excluding communication that is conspicuously marked or otherwise
+  designated in writing by the copyright owner as "Not a Contribution."
+
+  "Contributor" shall mean Licensor and any individual or Legal Entity
+  on behalf of whom a Contribution has been received by Licensor and
+  subsequently incorporated within the Work.
+
+2. Grant of Copyright License. Subject to the terms and conditions of
+  this License, each Contributor hereby grants to You a perpetual,
+  worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+  copyright license to reproduce, prepare Derivative Works of,
+  publicly display, publicly perform, sublicense, and distribute the
+  Work and such Derivative Works in Source or Object form.
+
+3. Grant of Patent License. Subject to the terms and conditions of
+  this License, each Contributor hereby grants to You a perpetual,
+  worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+  (except as stated in this section) patent license to make, have made,
+  use, offer to sell, sell, import, and otherwise transfer the Work,
+  where such license applies only to those patent claims licensable
+  by such Contributor that are necessarily infringed by their
+  Contribution(s) alone or by combination of their Contribution(s)
+  with the Work to which such Contribution(s) was submitted. If You
+  institute patent litigation against any entity (including a
+  cross-claim or counterclaim in a lawsuit) alleging that the Work
+  or a Contribution incorporated within the Work constitutes direct
+  or contributory patent infringement, then any patent licenses
+  granted to You under this License for that Work shall terminate
+  as of the date such litigation is filed.
+
+4. Redistribution. You may reproduce and distribute copies of the
+  Work or Derivative Works thereof in any medium, with or without
+  modifications, and in Source or Object form, provided that You
+  meet the following conditions:
+
+  (a) You must give any other recipients of the Work or
+      Derivative Works a copy of this License; and
+
+  (b) You must cause any modified files to carry prominent notices
+      stating that You changed the files; and
+
+  (c) You must retain, in the Source form of any Derivative Works
+      that You distribute, all copyright, patent, trademark, and
+      attribution notices from the Source form of the Work,
+      excluding those notices that do not pertain to any part of
+      the Derivative Works; and
+
+  (d) If the Work includes a "NOTICE" text file as part of its
+      distribution, then any Derivative Works that You distribute must
+      include a readable copy of the attribution notices contained
+      within such NOTICE file, excluding those notices that do not
+      pertain to any part of the Derivative Works, in at least one
+      of the following places: within a NOTICE text file distributed
+      as part of the Derivative Works; within the Source form or
+      documentation, if provided along with the Derivative Works; or,
+      within a display generated by the Derivative Works, if and
+      wherever such third-party notices normally appear. The contents
+      of the NOTICE file are for informational purposes only and
+      do not modify the License. You may add Your own attribution
+      notices within Derivative Works that You distribute, alongside
+      or as an addendum to the NOTICE text from the Work, provided
+      that such additional attribution notices cannot be construed
+      as modifying the License.
+
+  You may add Your own copyright statement to Your modifications and
+  may provide additional or different license terms and conditions
+  for use, reproduction, or distribution of Your modifications, or
+  for any such Derivative Works as a whole, provided Your use,
+  reproduction, and distribution of the Work otherwise complies with
+  the conditions stated in this License.
+
+5. Submission of Contributions. Unless You explicitly state otherwise,
+  any Contribution intentionally submitted for inclusion in the Work
+  by You to the Licensor shall be under the terms and conditions of
+  this License, without any additional terms or conditions.
+  Notwithstanding the above, nothing herein shall supersede or modify
+  the terms of any separate license agreement you may have executed
+  with Licensor regarding such Contributions.
+
+6. Trademarks. This License does not grant permission to use the trade
+  names, trademarks, service marks, or product names of the Licensor,
+  except as required for reasonable and customary use in describing the
+  origin of the Work and reproducing the content of the NOTICE file.
+
+7. Disclaimer of Warranty. Unless required by applicable law or
+  agreed to in writing, Licensor provides the Work (and each
+  Contributor provides its Contributions) on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+  implied, including, without limitation, any warranties or conditions
+  of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+  PARTICULAR PURPOSE. You are solely responsible for determining the
+  appropriateness of using or redistributing the Work and assume any
+  risks associated with Your exercise of permissions under this License.
+
+8. Limitation of Liability. In no event and under no legal theory,
+  whether in tort (including negligence), contract, or otherwise,
+  unless required by applicable law (such as deliberate and grossly
+  negligent acts) or agreed to in writing, shall any Contributor be
+  liable to You for damages, including any direct, indirect, special,
+  incidental, or consequential damages of any character arising as a
+  result of this License or out of the use or inability to use the
+  Work (including but not limited to damages for loss of goodwill,
+  work stoppage, computer failure or malfunction, or any and all
+  other commercial damages or losses), even if such Contributor
+  has been advised of the possibility of such damages.
+
+9. Accepting Warranty or Additional Liability. While redistributing
+  the Work or Derivative Works thereof, You may choose to offer,
+  and charge a fee for, acceptance of support, warranty, indemnity,
+  or other liability obligations and/or rights consistent with this
+  License. However, in accepting such obligations, You may act only
+  on Your own behalf and on Your sole responsibility, not on behalf
+  of any other Contributor, and only if You agree to indemnify,
+  defend, and hold each Contributor harmless for any liability
+  incurred by, or claims asserted against, such Contributor by reason
+  of your accepting any such warranty or additional liability.
+
+END OF TERMS AND CONDITIONS
+
+APPENDIX: How to apply the Apache License to your work.
+
+  To apply the Apache License to your work, attach the following
+  boilerplate notice, with the fields enclosed by brackets "[]"
+  replaced with your own identifying information. (Don't include
+  the brackets!)  The text should be enclosed in the appropriate
+  comment syntax for the file format. We also recommend that a
+  file or class name and description of purpose be included on the
+  same "printed page" as the copyright notice for easier
+  identification within third-party archives.
+
+Copyright [yyyy] [name of copyright owner]
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.

packages/page-crowdloan/README.md

@@ -0,0 +1 @@
+# @polkadot/app-crowdloan

packages/page-crowdloan/package.json

@@ -0,0 +1,15 @@
+{
+  "name": "@polkadot/app-crowdloan",
+  "private": true,
+  "version": "0.78.2-36",
+  "description": "A module to allow participating in crowdloan",
+  "main": "index.js",
+  "scripts": {},
+  "author": "Jaco Greeff <jacogr@gmail.com>",
+  "maintainers": [],
+  "license": "Apache-2.0",
+  "dependencies": {
+    "@babel/runtime": "^7.12.5",
+    "@polkadot/react-components": "^0.78.2-36"
+  }
+}

packages/page-crowdloan/src/Fund.tsx

@@ -0,0 +1,39 @@
+// Copyright 2017-2021 @polkadot/app-crowdloan authors & contributors
+// SPDX-License-Identifier: Apache-2.0
+
+import type BN from 'bn.js';
+import type { FundIndex, FundInfo } from '@polkadot/types/interfaces';
+
+import React, { useMemo } from 'react';
+
+import { AddressMini } from '@polkadot/react-components';
+import { BlockToTime, FormatBalance } from '@polkadot/react-query';
+import { formatNumber } from '@polkadot/util';
+
+interface Props {
+  bestNumber?: BN;
+  className?: string;
+  id: FundIndex;
+  info: FundInfo;
+}
+
+function Fund ({ bestNumber, className, id, info: { cap, end, owner, raised } }: Props): React.ReactElement<Props> {
+  const remaining = useMemo(() => bestNumber && end.sub(bestNumber), [bestNumber, end]);
+
+  return (
+    <tr className={className}>
+      <td className='number'><h1>{id}</h1></td>
+      <td className='address'><AddressMini value={owner} /></td>
+      <td className='number'><FormatBalance value={raised} /></td>
+      <td className='number'><FormatBalance value={cap} /></td>
+      <td className='number'>{remaining && (
+        <>
+          <BlockToTime blocks={remaining} />
+          #{formatNumber(end)}
+        </>
+      )}</td>
+    </tr>
+  );
+}
+
+export default React.memo(Fund);

packages/page-crowdloan/src/FundAdd.tsx

@@ -0,0 +1,134 @@
+// Copyright 2017-2021 @polkadot/app-crowdloan authors & contributors
+// SPDX-License-Identifier: Apache-2.0
+
+import type BN from 'bn.js';
+
+import React, { useState } from 'react';
+
+import { Button, InputAddress, InputBalance, InputNumber, Modal, TxButton } from '@polkadot/react-components';
+import { useAccounts, useApi, useToggle } from '@polkadot/react-hooks';
+import { BN_ZERO } from '@polkadot/util';
+
+import { useTranslation } from './translate';
+
+interface Props {
+  bestNumber?: BN;
+  className?: string;
+}
+
+function FundAdd ({ bestNumber, className }: Props): React.ReactElement<Props> {
+  const { t } = useTranslation();
+  const { api } = useApi();
+  const { hasAccounts } = useAccounts();
+  const [accountId, setAccountId] = useState<string | null>(null);
+  const [cap, setCap] = useState<BN | undefined>();
+  const [endBlock, setEndBlock] = useState<BN | undefined>();
+  const [firstSlot, setFirstSlot] = useState<BN | undefined>();
+  const [lastSlot, setLastSlot] = useState<BN | undefined>();
+  const [paraId, setParaId] = useState<BN | undefined>();
+  const [isOpen, toggleOpen] = useToggle();
+
+  const isEndError = !bestNumber || !endBlock || endBlock.lt(bestNumber);
+  const isLastError = !lastSlot || !firstSlot || lastSlot.eq(BN_ZERO) || lastSlot.lte(firstSlot) || lastSlot.gt(firstSlot.addn(3));
+
+  return (
+    <>
+      <Button
+        icon='plus'
+        isDisabled={!hasAccounts}
+        label={t<string>('Add campaign')}
+        onClick={toggleOpen}
+      />
+      {isOpen && (
+        <Modal
+          className={className}
+          header={t<string>('Add campaign')}
+          size='large'
+        >
+          <Modal.Content>
+            <Modal.Columns>
+              <Modal.Column>
+                <InputAddress
+                  label={t<string>('propose from')}
+                  onChange={setAccountId}
+                  type='account'
+                  value={accountId}
+                />
+              </Modal.Column>
+              <Modal.Column>
+                {t<string>('This account will be associated with the fund and pay the deposit. This should match the registrar for the parachain.')}
+              </Modal.Column>
+            </Modal.Columns>
+            <Modal.Columns>
+              <Modal.Column>
+                <InputNumber
+                  autoFocus
+                  isZeroable={false}
+                  label={t<string>('parachain id')}
+                  onChange={setParaId}
+                />
+              </Modal.Column>
+              <Modal.Column>
+                {t<string>('The parachain id this campaign refers to')}
+              </Modal.Column>
+            </Modal.Columns>
+            <Modal.Columns>
+              <Modal.Column>
+                <InputBalance
+                  isZeroable={false}
+                  label={t<string>('crowdfund cap')}
+                  onChange={setCap}
+                />
+              </Modal.Column>
+              <Modal.Column>
+                {t<string>('The amount to be raised in this funding campaign')}
+              </Modal.Column>
+            </Modal.Columns>
+            <Modal.Columns>
+              <Modal.Column>
+                <InputNumber
+                  isError={isEndError}
+                  label={t<string>('ending block')}
+                  onChange={setEndBlock}
+                />
+              </Modal.Column>
+              <Modal.Column>
+                {t<string>('The block until which this campaign is active for')}
+              </Modal.Column>
+            </Modal.Columns>
+            <Modal.Columns>
+              <Modal.Column>
+                <InputNumber
+                  isZeroable={false}
+                  label={t<string>('first slot')}
+                  onChange={setFirstSlot}
+                />
+                <InputNumber
+                  isError={isLastError}
+                  isZeroable={false}
+                  label={t<string>('last slot')}
+                  onChange={setLastSlot}
+                />
+              </Modal.Column>
+              <Modal.Column>
+                {t<string>('The first and last slots for this funding campaign. The last slot should be after the first and a maximum of 3 slots more than the first')}
+              </Modal.Column>
+            </Modal.Columns>
+          </Modal.Content>
+          <Modal.Actions onCancel={toggleOpen}>
+            <TxButton
+              accountId={accountId}
+              icon='plus'
+              isDisabled={!paraId?.gt(BN_ZERO) || !cap?.gt(BN_ZERO) || !firstSlot?.gt(BN_ZERO) || isEndError || isLastError}
+              onStart={toggleOpen}
+              params={[paraId, cap, firstSlot, lastSlot, endBlock]}
+              tx={api.tx.crowdloan.create}
+            />
+          </Modal.Actions>
+        </Modal>
+      )}
+    </>
+  );
+}
+
+export default React.memo(FundAdd);

packages/page-crowdloan/src/Funds.tsx

@@ -0,0 +1,67 @@
+// Copyright 2017-2021 @polkadot/app-crowdloan authors & contributors
+// SPDX-License-Identifier: Apache-2.0
+
+import type BN from 'bn.js';
+import type { Option } from '@polkadot/types';
+import type { FundIndex, FundInfo } from '@polkadot/types/interfaces';
+
+import React, { useEffect, useRef, useState } from 'react';
+
+import { Table } from '@polkadot/react-components';
+import { useApi, useCallMulti } from '@polkadot/react-hooks';
+
+import Fund from './Fund';
+import { useTranslation } from './translate';
+
+interface Props {
+  bestNumber?: BN;
+  className?: string;
+  fundIndexes: FundIndex[];
+}
+
+interface Fund {
+  id: FundIndex;
+  info: FundInfo;
+}
+
+function Funds ({ bestNumber, className, fundIndexes }: Props): React.ReactElement<Props> {
+  const { t } = useTranslation();
+  const { api } = useApi();
+  const optFunds = useCallMulti<Option<FundInfo>[]>(fundIndexes.map((id) => [api.query.crowdloan.funds, id]));
+  const [funds, setFunds] = useState<Fund[] | undefined>();
+
+  const headerRef = useRef([
+    [t('campaigns'), 'start', 2],
+    [t('raised'), 'number'],
+    [t('cap'), 'number'],
+    [t('end'), 'number']
+  ]);
+
+  // we actually want to split this further info completed and ongoing
+  useEffect((): void => {
+    optFunds && fundIndexes.length === optFunds.length && setFunds(
+      fundIndexes
+        .map((id, i) => ({ id, info: optFunds[i].unwrapOr(null) }))
+        .filter((fund): fund is Fund => !!fund.info)
+    );
+  }, [fundIndexes, optFunds]);
+
+  return (
+    <Table
+      className={className}
+      empty={funds && t<string>('No campaigns found')}
+      header={headerRef.current}
+    >
+      {funds?.map(({ id, info }) => (
+        <Fund
+          bestNumber={bestNumber}
+          id={id}
+          info={info}
+          key={id.toString()}
+        />
+      ))}
+    </Table>
+  );
+}
+
+export default React.memo(Funds);

packages/page-crowdloan/src/Overview.tsx

@@ -0,0 +1,39 @@
+// Copyright 2017-2021 @polkadot/app-crowdloan authors & contributors
+// SPDX-License-Identifier: Apache-2.0
+
+import type BN from 'bn.js';
+
+import React from 'react';
+
+import { Button } from '@polkadot/react-components';
+import { useApi, useCall } from '@polkadot/react-hooks';
+
+import FundAdd from './FundAdd';
+import Funds from './Funds';
+import Summary from './Summary';
+import useFundIndexes from './useFundIndexes';
+
+interface Props {
+  className?: string;
+}
+
+function Overview ({ className }: Props): React.ReactElement<Props> {
+  const { api } = useApi();
+  const bestNumber = useCall<BN>(api.derive.chain.bestNumber);
+  const fundIndexes = useFundIndexes();
+
+  return (
+    <div className={className}>
+      <Summary fundCount={fundIndexes.length} />
+      <Button.Group>
+        <FundAdd bestNumber={bestNumber} />
+      </Button.Group>
+      <Funds
+        bestNumber={bestNumber}
+        fundIndexes={fundIndexes}
+      />
+    </div>
+  );
+}
+
+export default React.memo(Overview);

packages/page-crowdloan/src/Summary.tsx

@@ -0,0 +1,28 @@
+// Copyright 2017-2021 @polkadot/app-crowdloan authors & contributors
+// SPDX-License-Identifier: Apache-2.0
+
+import React from 'react';
+
+import { CardSummary, SummaryBox } from '@polkadot/react-components';
+import { formatNumber } from '@polkadot/util';
+
+import { useTranslation } from './translate';
+
+interface Props {
+  className?: string;
+  fundCount: number;
+}
+
+function Summary ({ className, fundCount }: Props): React.ReactElement<Props> {
+  const { t } = useTranslation();
+
+  return (
+    <SummaryBox className={className}>
+      <CardSummary label={t<string>('funds')}>
+        {formatNumber(fundCount)}
+      </CardSummary>
+    </SummaryBox>
+  );
+}
+
+export default React.memo(Summary);

packages/page-crowdloan/src/index.tsx

@@ -0,0 +1,41 @@
+// Copyright 2017-2021 @polkadot/app-crowdloan authors & contributors
+// SPDX-License-Identifier: Apache-2.0
+
+import React, { useRef } from 'react';
+import styled from 'styled-components';
+
+import { Tabs } from '@polkadot/react-components';
+
+import Overview from './Overview';
+import { useTranslation } from './translate';
+
+interface Props {
+  basePath: string;
+  className?: string;
+}
+
+function CrowdloanApp ({ basePath, className }: Props): React.ReactElement<Props> {
+  const { t } = useTranslation();
+
+  const items = useRef([
+    {
+      isRoot: true,
+      name: 'overview',
+      text: t<string>('Overview')
+    }
+  ]);
+
+  return (
+    <main className={className}>
+      <header>
+        <Tabs
+          basePath={basePath}
+          items={items.current}
+        />
+      </header>
+      <Overview />
+    </main>
+  );
+}
+
+export default React.memo(styled(CrowdloanApp)``);

packages/page-crowdloan/src/translate.ts

@@ -0,0 +1,10 @@
+// Copyright 2017-2021 @polkadot/app-crowdloan authors & contributors
+// SPDX-License-Identifier: Apache-2.0
+
+import type { UseTranslationResponse } from 'react-i18next';
+
+import { useTranslation as useTranslationBase } from 'react-i18next';
+
+export function useTranslation (): UseTranslationResponse<'app-crowdloan'> {
+  return useTranslationBase('app-crowdloan');
+}

packages/page-crowdloan/src/useFundIndexes.ts

@@ -0,0 +1,24 @@
+// Copyright 2017-2021 @polkadot/app-crowdloan authors & contributors
+// SPDX-License-Identifier: Apache-2.0
+
+import type { FundIndex } from '@polkadot/types/interfaces';
+
+import { useEffect, useState } from 'react';
+
+import { useApi, useEventTrigger } from '@polkadot/react-hooks';
+
+export default function useFundIndexes (): FundIndex[] {
+  const { api } = useApi();
+  const [indexes, setIndexes] = useState<FundIndex[]>([]);
+  const trigger = useEventTrigger([api.events.crowdloan.Created]);
+
+  useEffect((): void => {
+    trigger &&
+      api.query.crowdloan.funds
+        .keys()
+        .then((indexes) => setIndexes(indexes.map(({ args }) => args[0] as FundIndex)))
+        .catch(console.error);
+  }, [api, trigger]);
+
+  return indexes;
+}

packages/page-parachains/src/Proposals/useProposals.ts

@@ -2,14 +2,14 @@
 // SPDX-License-Identifier: Apache-2.0
 
 import type { Option } from '@polkadot/types';
-import type { EventRecord, ParachainProposal, ParaId, SessionIndex } from '@polkadot/types/interfaces';
+import type { ParachainProposal, ParaId, SessionIndex } from '@polkadot/types/interfaces';
 import type { ProposalExt, Proposals, ScheduledProposals } from '../types';
 
 import { useEffect, useMemo, useState } from 'react';
 
-import { useApi, useCall, useCallMulti, useIsMountedRef } from '@polkadot/react-hooks';
+import { useApi, useCall, useCallMulti, useEventTrigger, useIsMountedRef } from '@polkadot/react-hooks';
 
-type MultiQuery = [EventRecord[], SessionIndex | undefined, ParaId[] | undefined];
+type MultiQuery = [SessionIndex | undefined, ParaId[] | undefined];
 
 function createResult (sessionIndex: SessionIndex, approvedIds: ParaId[], proposalKeys: { args: [ParaId] }[], scheduledProposals: [{ args: [SessionIndex] }, ParaId[]][]): Proposals {
   return {
@@ -25,34 +25,19 @@ function createResult (sessionIndex: SessionIndex, approvedIds: ParaId[], propos
 }
 
 const optionsMulti = {
-  defaultValue: [[], undefined, undefined] as MultiQuery,
-  transform: ([records, sessionIndex, approvedIds]: [EventRecord[], SessionIndex, ParaId[] | undefined]): MultiQuery => [
-    records.filter(({ event, phase }) => phase?.isApplyExtrinsic && event?.section === 'proposeParachain'),
-    sessionIndex,
-    approvedIds
-  ]
+  defaultValue: [undefined, undefined] as MultiQuery
 };
 
 export default function useProposals (): Proposals | undefined {
   const { api } = useApi();
-  const mountedRef = useIsMountedRef();
   const [state, setState] = useState<Proposals | undefined>();
-  const [trigger, setTrigger] = useState(() => Date.now());
-  const [events, sessionIndex, approvedIds] = useCallMulti<MultiQuery>([
-    api.query.system.events,
+  const mountedRef = useIsMountedRef();
+  const trigger = useEventTrigger(['proposeParachain']);
+  const [sessionIndex, approvedIds] = useCallMulti<MultiQuery>([
     api.query.session.currentIndex,
     api.query.proposeParachain?.approvedProposals
   ], optionsMulti);
 
-  // trigger on any proposeParachain events
-  useEffect((): void => {
-    mountedRef.current && events && setTrigger((trigger) =>
-      events.length
-        ? Date.now()
-        : trigger
-    );
-  }, [events, mountedRef]);
-
   // re-get all our entries in the list
   useEffect((): void => {
     approvedIds && sessionIndex && trigger &&

packages/react-components/src/InputNumber.tsx

@@ -148,7 +148,7 @@ function getValuesFromString (api: ApiPromise, value: string, si: SiDef | null,
   ];
 }
 
-function getValuesFromBn (valueBn: BN, si: SiDef | null): [string, BN, boolean] {
+function getValuesFromBn (valueBn: BN, si: SiDef | null, isZeroable: boolean): [string, BN, boolean] {
   const value = si
     ? valueBn.div(BN_TEN.pow(new BN(formatBalance.getDefaults().decimals + si.power))).toString()
     : valueBn.toString();
@@ -156,13 +156,13 @@ function getValuesFromBn (valueBn: BN, si: SiDef | null): [string, BN, boolean]
   return [
     value,
     valueBn,
-    true
+    isZeroable ? true : valueBn.gt(BN_ZERO)
   ];
 }
 
 function getValues (api: ApiPromise, value: BN | string = BN_ZERO, si: SiDef | null, bitLength: BitLength, isZeroable: boolean, maxValue?: BN): [string, BN, boolean] {
   return isBn(value)
-    ? getValuesFromBn(value, si)
+    ? getValuesFromBn(value, si, isZeroable)
     : getValuesFromString(api, value, si, bitLength, isZeroable, maxValue);
 }
 

packages/react-hooks/src/index.ts

@@ -15,6 +15,7 @@ export { useCallMulti } from './useCallMulti';
 export { useContracts } from './useContracts';
 export { useFormField } from './useFormField';
 export { useDebounce } from './useDebounce';
+export { useEventTrigger } from './useEventTrigger';
 export { useFavorites } from './useFavorites';
 export { useIncrement } from './useIncrement';
 export { calcInflation, useInflation } from './useInflation';

packages/react-hooks/src/useEventTrigger.ts

@@ -0,0 +1,37 @@
+// Copyright 2017-2021 @polkadot/react-hooks authors & contributors
+// SPDX-License-Identifier: Apache-2.0
+
+import type { AugmentedEvent } from '@polkadot/api/types';
+import type { EventRecord } from '@polkadot/types/interfaces';
+
+import { useEffect, useState } from 'react';
+
+import { isString } from '@polkadot/util';
+
+import { useApi } from './useApi';
+import { useCall } from './useCall';
+import { useIsMountedRef } from './useIsMountedRef';
+
+type EventCheck = AugmentedEvent<'promise'> | string | false | undefined | null;
+
+export function useEventTrigger (events: EventCheck[]): number {
+  const { api } = useApi();
+  const [trigger, setTrigger] = useState(() => Date.now());
+  const mountedRef = useIsMountedRef();
+  const eventRecords = useCall<EventRecord[]>(api.query.system.events);
+
+  useEffect((): void => {
+    const count = eventRecords && eventRecords.filter(({ event, phase }) =>
+      event && phase?.isApplyExtrinsic &&
+      events.some((check) => check && (
+        isString(check)
+          ? event.section === check
+          : check.is(event)
+      ))
+    ).length;
+
+    mountedRef.current && count && setTrigger(Date.now());
+  }, [eventRecords, events, mountedRef]);
+
+  return trigger;
+}

tsconfig.json

@@ -28,6 +28,8 @@
       "@polkadot/app-contracts/*": [ "packages/page-contracts/src/*" ],
       "@polkadot/app-council": [ "packages/page-council/src" ],
       "@polkadot/app-council/*": [ "packages/page-council/src/*" ],
+      "@polkadot/app-crowdloan": [ "packages/page-crowdloan/src" ],
+      "@polkadot/app-crowdloan/*": [ "packages/page-crowdloan/src/*" ],
       "@polkadot/app-democracy": [ "packages/page-democracy/src" ],
       "@polkadot/app-democracy/*": [ "packages/page-democracy/src/*" ],
       "@polkadot/app-extrinsics": [ "packages/page-extrinsics/src" ],

yarn.lock

@@ -2034,6 +2034,15 @@ __metadata:
   languageName: unknown
   linkType: soft
 
+"@polkadot/app-crowdloan@workspace:packages/page-crowdloan":
+  version: 0.0.0-use.local
+  resolution: "@polkadot/app-crowdloan@workspace:packages/page-crowdloan"
+  dependencies:
+    "@babel/runtime": ^7.12.5
+    "@polkadot/react-components": ^0.78.2-36
+  languageName: unknown
+  linkType: soft
+
 "@polkadot/app-democracy@workspace:packages/page-democracy":
   version: 0.0.0-use.local
   resolution: "@polkadot/app-democracy@workspace:packages/page-democracy"