23 lines
816 B
TypeScript
23 lines
816 B
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 { StorageKey } from '@polkadot/types';
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import type { AssetId } from '@polkadot/types/interfaces';
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import { createNamedHook, useApi, useEventTrigger, useMapKeys } from '@polkadot/react-hooks';
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function extractAssetIds (keys: StorageKey<[AssetId]>[]): AssetId[] {
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return keys
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.map(({ args: [assetId] }) => assetId)
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.sort((a, b) => a.cmp(b));
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}
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function useAssetIdsImpl (): AssetId[] | undefined {
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const { api } = useApi();
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const trigger = useEventTrigger([api.events.assets.Created, api.events.assets.Destroyed]);
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return useMapKeys(api.query.assets.asset, { at: trigger.blockHash, transform: extractAssetIds });
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}
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export default createNamedHook('useAssetIds', useAssetIdsImpl);
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