refactor: assert when voter exists when creating vote

subgraphs/venus-governance/src/mappings/alpha.ts

@@ -86,6 +86,8 @@ export function handleVoteCast(event: VoteCast): void {
 }
 
 export function handleVoteCastV2(event: VoteCast): void {
+  // Always check for a delegate in order to support 0 value votes
+  getOrCreateDelegate(event.params.voter);
   createVoteAlpha(event);
   updateAlphaProposalVotes(event.params.proposalId, event.params.votes, event.params.support);
 }

subgraphs/venus-governance/src/mappings/bravo.ts

@@ -26,11 +26,13 @@ import {
 } from '../operations/update';
 
 export function handleProposalCreated(event: ProposalCreated): void {
+  // Always check for a delegate in order to support 0 value votes
   getOrCreateDelegate(event.params.proposer);
   createProposal<ProposalCreated>(event);
 }
 
 export function handleProposalCreatedV2(event: ProposalCreatedV2): void {
+  // Always check for a delegate in order to support 0 value votes
   getOrCreateDelegate(event.params.proposer);
   const proposal = createProposal<ProposalCreatedV2>(event);
   const indexProposalTypeConstant = [NORMAL, FAST_TRACK, CRITICAL];

subgraphs/venus-governance/src/operations/create.ts

@@ -42,9 +42,10 @@ export function createProposal<E>(event: E): Proposal {
 
 export function createVoteAlpha(event: VoteCastAlpha): Vote {
   const id = getVoteId(event.params.voter, event.params.proposalId);
+  const voter = getDelegate(event.params.voter);
   const vote = new Vote(id);
   vote.proposal = getProposalId(event.params.proposalId);
-  vote.voter = event.params.voter;
+  vote.voter = voter.id;
   vote.votes = event.params.votes;
   vote.support = event.params.support ? FOR : AGAINST;