Jaco
5145a0c181
* Bump dev * Adjust dev/node/test/node.d.ts imports * Fix types-support imports * Adjust extensionless imports
25 lines
787 B
TypeScript
25 lines
787 B
TypeScript
// Copyright 2017-2023 @polkadot/api-derive authors & contributors
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// SPDX-License-Identifier: Apache-2.0
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import type { Observable } from 'rxjs';
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import type { SignedBlockExtended } from '../type/types.js';
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import type { DeriveApi } from '../types.js';
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import { switchMap } from 'rxjs';
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import { memo } from '../util/index.js';
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/**
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* @name subscribeFinalizedBlocks
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* @returns The finalized block & events for that block
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*/
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export function subscribeFinalizedBlocks (instanceId: string, api: DeriveApi): () => Observable<SignedBlockExtended> {
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return memo(instanceId, (): Observable<SignedBlockExtended> =>
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api.derive.chain.subscribeFinalizedHeads().pipe(
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switchMap((header) =>
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api.derive.chain.getBlock(header.createdAtHash || header.hash)
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)
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)
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);
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}
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