Jaco
320135dbe5
* Author extract using correct as-at state * Align header retrieval * Dedupe * Deupe * Adjust * Remove deprecated events.at * 10.3.4
46 lines
1.5 KiB
TypeScript
46 lines
1.5 KiB
TypeScript
// Copyright 2017-2023 @polkadot/api-derive authors & contributors
|
|
// SPDX-License-Identifier: Apache-2.0
|
|
|
|
import type { Observable } from 'rxjs';
|
|
import type { SignedBlockExtended } from '../type/types.js';
|
|
import type { DeriveApi } from '../types.js';
|
|
|
|
import { combineLatest, map, of, switchMap } from 'rxjs';
|
|
|
|
import { createSignedBlockExtended } from '../type/index.js';
|
|
import { memo } from '../util/index.js';
|
|
import { getAuthorDetails } from './util.js';
|
|
|
|
/**
|
|
* @name getBlock
|
|
* @param {( Uint8Array | string )} hash - A block hash as U8 array or string.
|
|
* @description Get a specific block (e.g. rpc.chain.getBlock) and extend it with the author
|
|
* @example
|
|
* <BR>
|
|
*
|
|
* ```javascript
|
|
* const { author, block } = await api.derive.chain.getBlock('0x123...456');
|
|
*
|
|
* console.log(`block #${block.header.number} was authored by ${author}`);
|
|
* ```
|
|
*/
|
|
export function getBlock (instanceId: string, api: DeriveApi): (hash: Uint8Array | string) => Observable<SignedBlockExtended> {
|
|
return memo(instanceId, (blockHash: Uint8Array | string): Observable<SignedBlockExtended> =>
|
|
combineLatest([
|
|
api.rpc.chain.getBlock(blockHash),
|
|
api.queryAt(blockHash)
|
|
]).pipe(
|
|
switchMap(([signedBlock, queryAt]) =>
|
|
combineLatest([
|
|
of(signedBlock),
|
|
queryAt.system.events(),
|
|
getAuthorDetails(api, signedBlock.block.header, blockHash)
|
|
])
|
|
),
|
|
map(([signedBlock, events, [, validators, author]]) =>
|
|
createSignedBlockExtended(events.registry, signedBlock, events, validators, author)
|
|
)
|
|
)
|
|
);
|
|
}
|