71 lines
2.3 KiB
TypeScript
71 lines
2.3 KiB
TypeScript
// Copyright 2017-2022 @polkadot/app-assets 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 { AccountId } from '@polkadot/types/interfaces';
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import type { PalletAssetsAssetDetails, PalletAssetsAssetMetadata } from '@polkadot/types/lookup';
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import type { BN } from '@polkadot/util';
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import type { AssetInfo } from './types';
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import { useEffect, useState } from 'react';
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import { createNamedHook, useAccounts, useApi, useCall } from '@polkadot/react-hooks';
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const EMPTY_FLAGS = {
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isAdminMe: false,
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isFreezerMe: false,
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isIssuerMe: false,
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isOwnerMe: false
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};
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const QUERY_OPTS = { withParams: true };
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function isAccount (allAccounts: string[], accountId: AccountId): boolean {
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const address = accountId.toString();
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return allAccounts.some((a) => a === address);
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}
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function extractInfo (allAccounts: string[], id: BN, optDetails: Option<PalletAssetsAssetDetails>, metadata: PalletAssetsAssetMetadata): AssetInfo {
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const details = optDetails.unwrapOr(null);
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return {
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...(details
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? {
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isAdminMe: isAccount(allAccounts, details.admin),
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isFreezerMe: isAccount(allAccounts, details.freezer),
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isIssuerMe: isAccount(allAccounts, details.issuer),
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isOwnerMe: isAccount(allAccounts, details.owner)
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}
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: EMPTY_FLAGS
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),
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details,
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id,
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key: id.toString(),
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metadata: metadata.isEmpty
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? null
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: metadata
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};
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}
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function useAssetInfosImpl (ids?: BN[]): AssetInfo[] | undefined {
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const { api } = useApi();
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const { allAccounts } = useAccounts();
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const metadata = useCall<[[BN[]], PalletAssetsAssetMetadata[]]>(api.query.assets.metadata.multi, [ids], QUERY_OPTS);
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const details = useCall<[[BN[]], Option<PalletAssetsAssetDetails>[]]>(api.query.assets.asset.multi, [ids], QUERY_OPTS);
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const [state, setState] = useState<AssetInfo[] | undefined>();
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useEffect((): void => {
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details && metadata && (details[0][0].length === metadata[0][0].length) &&
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setState(
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details[0][0].map((id, index) =>
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extractInfo(allAccounts, id, details[1][index], metadata[1][index])
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)
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);
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}, [allAccounts, details, ids, metadata]);
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return state;
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}
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export default createNamedHook('useAssetInfos', useAssetInfosImpl);
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