packages/api-derive/src/parachains/overview.ts
// Copyright 2017-2024 @polkadot/api-derive authors & contributors
// SPDX-License-Identifier: Apache-2.0
import type { Observable } from 'rxjs';
import type { ParaId } from '@polkadot/types/interfaces';
import type { DeriveApi, DeriveParachain, DeriveParachainInfo } from '../types.js';
import type { DidUpdate, ParaInfoResult, PendingSwap, RelayDispatchQueueSize } from './types.js';
import { combineLatest, map, of, switchMap } from 'rxjs';
import { objectSpread } from '@polkadot/util';
import { memo } from '../util/index.js';
import { didUpdateToBool } from './util.js';
type Result = [
ParaId[],
DidUpdate,
RelayDispatchQueueSize[],
ParaInfoResult[],
PendingSwap[]
];
function parse ([ids, didUpdate, relayDispatchQueueSizes, infos, pendingSwaps]: Result): DeriveParachain[] {
return ids.map((id, index): DeriveParachain => ({
didUpdate: didUpdateToBool(didUpdate, id),
id,
info: objectSpread<DeriveParachainInfo>({ id }, infos[index].unwrapOr(null)),
pendingSwapId: pendingSwaps[index].unwrapOr(null),
relayDispatchQueueSize: relayDispatchQueueSizes[index][0].toNumber()
}));
}
export function overview (instanceId: string, api: DeriveApi): () => Observable<DeriveParachain[]> {
return memo(instanceId, (): Observable<DeriveParachain[]> =>
api.query['registrar']?.['parachains'] && api.query['parachains']
? api.query['registrar']['parachains']<ParaId[]>().pipe(
switchMap((paraIds) =>
combineLatest([
of(paraIds),
api.query['parachains']['didUpdate']<DidUpdate>(),
api.query['parachains']['relayDispatchQueueSize'].multi<RelayDispatchQueueSize>(paraIds),
api.query['registrar']['paras'].multi<ParaInfoResult>(paraIds),
api.query['registrar']['pendingSwap'].multi<PendingSwap>(paraIds)
])
),
map(parse)
)
: of([] as DeriveParachain[])
);
}