Jaco Greeff
67a3376ef8
* POC for a rough derive cache * With expiry * Cache cleanups * Memory cache * Small cleanups
36 lines
1.6 KiB
TypeScript
36 lines
1.6 KiB
TypeScript
// Copyright 2017-2020 @polkadot/api-derive authors & contributors
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// This software may be modified and distributed under the terms
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// of the Apache-2.0 license. See the LICENSE file for details.
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import { ApiInterfaceRx } from '@polkadot/api/types';
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import { EraIndex } from '@polkadot/types/interfaces';
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import { DeriveStakerSlashes } from '../types';
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import { Observable } from 'rxjs';
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import { map, switchMap } from 'rxjs/operators';
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import { memo } from '../util';
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export function _stakerSlashes (api: ApiInterfaceRx): (accountId: Uint8Array | string, eras: EraIndex[], withActive: boolean) => Observable<DeriveStakerSlashes[]> {
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return memo((accountId: Uint8Array | string, eras: EraIndex[], withActive: boolean): Observable<DeriveStakerSlashes[]> => {
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const stakerId = api.registry.createType('AccountId', accountId).toString();
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return api.derive.staking._erasSlashes(eras, withActive).pipe(
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map((slashes): DeriveStakerSlashes[] =>
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slashes.map(({ era, nominators, validators }): DeriveStakerSlashes => ({
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era,
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total: nominators[stakerId] || validators[stakerId] || api.registry.createType('Balance')
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}))
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)
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);
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});
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}
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export function stakerSlashes (api: ApiInterfaceRx): (accountId: Uint8Array | string, withActive?: boolean) => Observable<DeriveStakerSlashes[]> {
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return memo((accountId: Uint8Array | string, withActive = false): Observable<DeriveStakerSlashes[]> =>
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api.derive.staking.erasHistoric(withActive).pipe(
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switchMap((eras) => api.derive.staking._stakerSlashes(accountId, eras, withActive))
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)
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);
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}
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