Jaco Greeff
0e52e8fe23
* Some type imports (interfaces) * Additional * Additional * Small movements/fixes * Additional * Additional * Unsaved...
58 lines
2.2 KiB
TypeScript
58 lines
2.2 KiB
TypeScript
// Copyright 2017-2020 @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 { AccountId, AccountIndex, Address } from '@polkadot/types/interfaces';
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import type { AccountIdAndIndex } from '../types';
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import { of } from 'rxjs';
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import { map } from 'rxjs/operators';
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import { ApiInterfaceRx } from '@polkadot/api/types';
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import { isU8a } from '@polkadot/util';
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import { decodeAddress } from '@polkadot/util-crypto';
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import { memo } from '../util';
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function retrieve (api: ApiInterfaceRx, address: Address | AccountId | AccountIndex | Uint8Array | string | null | undefined): Observable<AccountIdAndIndex> {
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try {
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// yes, this can fail, don't care too much, catch will catch it
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const decoded = isU8a(address)
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? address
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: decodeAddress((address || '').toString());
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if (decoded.length > 8) {
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const accountId = api.registry.createType('AccountId', decoded);
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return api.derive.accounts.idToIndex(accountId).pipe(
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map((accountIndex): AccountIdAndIndex => [accountId, accountIndex])
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);
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}
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const accountIndex = api.registry.createType('AccountIndex', decoded);
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return api.derive.accounts.indexToId(accountIndex.toString()).pipe(
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map((accountId): AccountIdAndIndex => [accountId, accountIndex])
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);
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} catch (error) {
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return of([undefined, undefined]);
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}
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}
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/**
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* @name idAndIndex
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* @param {(Address | AccountId | AccountIndex | Uint8Array | string | null)} address - An accounts address in various formats.
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* @description An array containing the [[AccountId]] and [[AccountIndex]] as optional values.
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* @example
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* <BR>
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*
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* ```javascript
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* api.derive.accounts.idAndIndex('F7Hs', ([id, ix]) => {
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* console.log(`AccountId #${id} with corresponding AccountIndex ${ix}`);
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* });
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* ```
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*/
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export function idAndIndex (instanceId: string, api: ApiInterfaceRx): (address?: Address | AccountId | AccountIndex | Uint8Array | string | null) => Observable<AccountIdAndIndex> {
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return memo(instanceId, (address?: Address | AccountId | AccountIndex | Uint8Array | string | null): Observable<AccountIdAndIndex> =>
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retrieve(api, address));
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}
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