packages/api-derive/src/staking/cache.ts
// Copyright 2017-2024 @polkadot/api-derive authors & contributors
// SPDX-License-Identifier: Apache-2.0
import type { EraIndex } from '@polkadot/types/interfaces';
import { deriveCache } from '../util/index.js';
export function getEraCache <T> (CACHE_KEY: string, era: EraIndex, withActive?: boolean): [string, T | undefined] {
const cacheKey = `${CACHE_KEY}-${era.toString()}`;
return [
cacheKey,
withActive
? undefined
: deriveCache.get<T>(cacheKey)
];
}
export function getEraMultiCache <T> (CACHE_KEY: string, eras: EraIndex[], withActive?: boolean): T[] {
const cached: T[] = withActive
? []
: eras
.map((e) => deriveCache.get<T>(`${CACHE_KEY}-${e.toString()}`))
.filter((v): v is T => !!v);
return cached;
}
export function setEraCache <T extends { era: EraIndex }> (cacheKey: string, withActive: boolean, value: T): T {
!withActive && deriveCache.set(cacheKey, value);
return value;
}
export function setEraMultiCache <T extends { era: EraIndex }> (CACHE_KEY: string, withActive: boolean, values: T[]): T[] {
!withActive && values.forEach((v) => deriveCache.set(`${CACHE_KEY}-${v.era.toString()}`, v));
return values;
}
export function filterCachedEras <T extends { era: EraIndex }> (eras: EraIndex[], cached: T[], query: T[]): T[] {
return eras
.map((e) =>
cached.find(({ era }) => e.eq(era)) ||
query.find(({ era }) => e.eq(era))
)
.filter((e): e is T => !!e);
}