54 lines
1.4 KiB
TypeScript
54 lines
1.4 KiB
TypeScript
// Copyright 2017-2021 @polkadot/react-hooks authors & contributors
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// SPDX-License-Identifier: Apache-2.0
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import type { Option } from '@polkadot/types';
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import type { RegistrarInfo } from '@polkadot/types/interfaces';
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import { useMemo } from 'react';
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import { useAccounts } from './useAccounts';
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import { useApi } from './useApi';
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import { useCall } from './useCall';
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interface RegistrarNull {
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address: string | null;
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index: number;
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}
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interface Registrar {
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address: string;
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index: number;
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}
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interface State {
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isRegistrar: boolean;
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registrars: Registrar[];
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skipQuery?: boolean;
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}
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export function useRegistrars (skipQuery?: boolean): State {
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const { api } = useApi();
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const { allAccounts, hasAccounts } = useAccounts();
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const query = useCall<Option<RegistrarInfo>[]>(!skipQuery && hasAccounts && api.query.identity?.registrars);
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// determine if we have a registrar or not - registrars are allowed to approve
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return useMemo(
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(): State => {
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const registrars = (query || [])
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.map((registrar, index): RegistrarNull => ({
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address: registrar.isSome
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? registrar.unwrap().account.toString()
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: null,
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index
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}))
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.filter((registrar): registrar is Registrar => !!registrar.address);
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return {
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isRegistrar: registrars.some(({ address }) => allAccounts.includes(address)),
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registrars
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};
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},
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[allAccounts, query]
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);
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}
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