Fix election candidate derive (#3239)

CHANGELOG.md

@@ -1,5 +1,26 @@
 # CHANGELOG
 
+## 3.11.1 Feb 28, 2021
+
+Upgrade priority: Low. Recommended for users wanting to keep updated with chain changes.
+
+Contributed:
+
+- Clean Websocket states on disconnects (Thanks to https://github.com/ianhe8x)
+- Support for C-like indexed enums (Thanks to https://github.com/xlc)
+
+Changes:
+
+- Adjust council derives to cater for current-generation candidate mapping
+- Allow for override of codec hasher (& output type)
+- Adjust submittables to submit hex-encoded addresses to queries
+- Adjust initialization to always retrieve tx version from Metadata only
+- Update election types as per latest Substrate
+- Add types for the new gilt module
+- Upgrade to the latest Substrate metadata
+- Adjust package detection to check for local monorepo dependencies
+
+
 ## 3.10.2 Feb 23, 2021
 
 Upgrade priority: Medium. Recommended for users of chains where `MultiAddress` is in-use and blocks are decoded.

packages/api-derive/src/elections/info.ts

@@ -15,16 +15,28 @@ import { memo } from '../util';
 // SeatHolder is current tuple is 2.x-era Substrate
 type Member = SeatHolder | ITuple<[AccountId, Balance]>;
 
+type Candidate = AccountId | ITuple<[AccountId, Balance]>;
+
 function isSeatHolder (value: Member): value is SeatHolder {
   return !Array.isArray(value);
 }
 
+function isCandidateTuple (value: Candidate): value is ITuple<[AccountId, Balance]> {
+  return Array.isArray(value);
+}
+
 function getAccountTuple (value: Member): [AccountId, Balance] {
   return isSeatHolder(value)
     ? [value.who, value.stake]
     : value;
 }
 
+function getCandidate (value: Candidate): AccountId {
+  return isCandidateTuple(value)
+    ? value[0]
+    : value;
+}
+
 function sortAccounts ([, balanceA]: [AccountId, Balance], [, balanceB]: [AccountId, Balance]): number {
   return balanceB.cmp(balanceA);
 }
@@ -32,7 +44,7 @@ function sortAccounts ([, balanceA]: [AccountId, Balance], [, balanceB]: [Accoun
 function queryElections (api: ApiInterfaceRx): Observable<DeriveElectionsInfo> {
   const section = api.query.electionsPhragmen ? 'electionsPhragmen' : 'elections';
 
-  return api.queryMulti<[Vec<AccountId>, Vec<AccountId>, Vec<Member>, Vec<Member>]>([
+  return api.queryMulti<[Vec<AccountId>, Vec<Candidate>, Vec<Member>, Vec<Member>]>([
     api.query.council.members,
     api.query[section].candidates,
     api.query[section].members,
@@ -41,7 +53,7 @@ function queryElections (api: ApiInterfaceRx): Observable<DeriveElectionsInfo> {
     map(([councilMembers, candidates, members, runnersUp]): DeriveElectionsInfo => ({
       candidacyBond: api.consts[section].candidacyBond as Balance,
       candidateCount: api.registry.createType('u32', candidates.length),
-      candidates,
+      candidates: candidates.map(getCandidate),
       desiredRunnersUp: api.consts[section].desiredRunnersUp as u32,
       desiredSeats: api.consts[section].desiredMembers as u32,
       members: members.length