packages/api-derive/src/accounts/idAndIndex.ts
// Copyright 2017-2024 @polkadot/api-derive authors & contributors
// SPDX-License-Identifier: Apache-2.0
import type { Observable } from 'rxjs';
import type { AccountId, AccountIndex, Address } from '@polkadot/types/interfaces';
import type { AccountIdAndIndex, DeriveApi } from '../types.js';
import { map, of } from 'rxjs';
import { isU8a } from '@polkadot/util';
import { decodeAddress } from '@polkadot/util-crypto';
import { memo } from '../util/index.js';
/**
* @name idAndIndex
* @param {(Address | AccountId | AccountIndex | Uint8Array | string | null)} address - An accounts address in various formats.
* @description An array containing the [[AccountId]] and [[AccountIndex]] as optional values.
* @example
* <BR>
*
* ```javascript
* api.derive.accounts.idAndIndex('F7Hs', ([id, ix]) => {
* console.log(`AccountId #${id} with corresponding AccountIndex ${ix}`);
* });
* ```
*/
export function idAndIndex (instanceId: string, api: DeriveApi): (address?: Address | AccountId | AccountIndex | Uint8Array | string | null) => Observable<AccountIdAndIndex> {
return memo(instanceId, (address?: Address | AccountId | AccountIndex | Uint8Array | string | null): Observable<AccountIdAndIndex> => {
try {
// yes, this can fail, don't care too much, catch will catch it
const decoded = isU8a(address)
? address
: decodeAddress((address || '').toString());
if (decoded.length > 8) {
const accountId = api.registry.createType('AccountId', decoded);
return api.derive.accounts.idToIndex(accountId).pipe(
map((accountIndex): AccountIdAndIndex => [accountId, accountIndex])
);
}
const accountIndex = api.registry.createType('AccountIndex', decoded);
return api.derive.accounts.indexToId(accountIndex.toString()).pipe(
map((accountId): AccountIdAndIndex => [accountId, accountIndex])
);
} catch {
return of([undefined, undefined]);
}
});
}