packages/api-derive/src/staking/waitingInfo.ts
// Copyright 2017-2024 @polkadot/api-derive authors & contributors
// SPDX-License-Identifier: Apache-2.0
import type { Observable } from 'rxjs';
import type { DeriveApi, DeriveStakingWaiting, StakingQueryFlags } from '../types.js';
import { combineLatest, map, switchMap } from 'rxjs';
import { memo } from '../util/index.js';
const DEFAULT_FLAGS = { withController: true, withPrefs: true };
export function waitingInfo (instanceId: string, api: DeriveApi): (flags?: StakingQueryFlags) => Observable<DeriveStakingWaiting> {
return memo(instanceId, (flags: StakingQueryFlags = DEFAULT_FLAGS): Observable<DeriveStakingWaiting> =>
combineLatest([
api.derive.staking.validators(),
api.derive.staking.stashes()
]).pipe(
switchMap(([{ nextElected }, stashes]): Observable<DeriveStakingWaiting> => {
const elected = nextElected.map((a) => a.toString());
const waiting = stashes.filter((v) => !elected.includes(v.toString()));
return api.derive.staking.queryMulti(waiting, flags).pipe(
map((info): DeriveStakingWaiting => ({
info,
waiting
}))
);
})
)
);
}