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2019-04-11 13:42:06 +12:00
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+// Copyright 2017-2019 @polkadot/api-derive authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+import BN from 'bn.js';
+import { combineLatest, Observable } from 'rxjs';
+import { map } from 'rxjs/operators';
+import { ApiInterface$Rx } from '@plugnet/api/types';
+import { AccountId, AccountIndex, Address, Balance } from '@plugnet/types';
+
+import { DerivedBalances } from '../types';
+import { drr } from '../util/drr';
+import { votingBalance } from './votingBalance';
+import { votingBalancesNominatorsFor } from './votingBalancesNominatorsFor';
+
+export function validatingBalance (api: ApiInterface$Rx) {
+  return (address: AccountId | AccountIndex | Address | string): Observable<DerivedBalances> => {
+    return combineLatest(
+      votingBalance(api)(address),
+      votingBalancesNominatorsFor(api)(address)
+    ).pipe(
+      map(([balance, nominators]) => {
+        const nominatedBalance = nominators.reduce(
+          (total: BN, nominatorBalance: DerivedBalances) =>
+            total.add(nominatorBalance.votingBalance),
+          new BN(0)
+        );
+
+        return {
+          ...balance,
+          nominators,
+          nominatedBalance: new Balance(nominatedBalance),
+          stakingBalance: new Balance(
+            nominatedBalance.add(balance.votingBalance)
+          )
+        };
+      }),
+      drr()
+    );
+  };
+}