53 lines
2.4 KiB
TypeScript
53 lines
2.4 KiB
TypeScript
// Copyright 2017-2024 @polkadot/api-derive authors & contributors
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// SPDX-License-Identifier: Apache-2.0
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import type { Observable } from 'rxjs';
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import type { EraIndex } from '@polkadot/types/interfaces';
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import type { DeriveApi } from '../types.js';
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import type { DeriveEraValidatorExposurePaged, DeriveStakerExposure } from './types.js';
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import { map, switchMap } from 'rxjs';
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import { firstMemo, memo } from '../util/index.js';
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export function _stakerExposures (instanceId: string, api: DeriveApi): (accountIds: (Uint8Array | string)[], eras: EraIndex[], withActive?: boolean) => Observable<DeriveStakerExposure[][]> {
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return memo(instanceId, (accountIds: (Uint8Array | string)[], eras: EraIndex[], withActive = false): Observable<DeriveStakerExposure[][]> => {
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const stakerIds = accountIds.map((a) => api.registry.createType('AccountId', a).toString());
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return api.derive.staking._erasExposure(eras, withActive).pipe(
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map((exposures): DeriveStakerExposure[][] =>
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stakerIds.map((stakerId) =>
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exposures.map(({ era, nominators: allNominators, validators: allValidators }): DeriveStakerExposure => {
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const isValidator = !!allValidators[stakerId];
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const validators: DeriveEraValidatorExposurePaged = {};
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const nominating = allNominators[stakerId] || [];
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if (isValidator) {
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validators[stakerId] = allValidators[stakerId];
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} else if (nominating) {
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nominating.forEach(({ validatorId }): void => {
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validators[validatorId] = allValidators[validatorId];
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});
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}
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return { era, isEmpty: !Object.keys(validators).length, isValidator, nominating, validators };
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})
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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 stakerExposures (instanceId: string, api: DeriveApi): (accountIds: (Uint8Array | string)[], withActive?: boolean) => Observable<DeriveStakerExposure[][]> {
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return memo(instanceId, (accountIds: (Uint8Array | string)[], withActive = false): Observable<DeriveStakerExposure[][]> =>
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api.derive.staking.erasHistoric(withActive).pipe(
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switchMap((eras) => api.derive.staking._stakerExposures(accountIds, eras, withActive))
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)
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);
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}
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export const stakerExposure = /*#__PURE__*/ firstMemo(
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(api: DeriveApi, accountId: Uint8Array | string, withActive?: boolean) =>
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api.derive.staking.stakerExposures([accountId], withActive)
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);
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