fix(aquachain): clearer LocalDAO error toasts

apps/aquachain/src/app/components/local-dao/local-dao.ts

@@ -40,6 +40,7 @@ import {
   voteCount,
   VoteChoice,
 } from '@services/local-dao/local-dao';
+import { humanizeContractError } from '@services/contract/contract-errors';
 import { ModuleShell } from '../module-shell/module-shell';
 import { WalletBanner } from '../shared/wallet-banner/wallet-banner';
 
@@ -248,6 +249,20 @@ export class LocalDao implements OnInit {
     if (!this.selected) {
       return;
     }
+    try {
+      await this.ensureWallet();
+      await this.refreshWalletVote();
+    } catch (err: unknown) {
+      this.toastr.showError(humanizeContractError(err), 'Wallet Connection Failed');
+      return;
+    }
+    if (this.walletVote) {
+      this.toastr.showError(
+        `You already voted ${this.walletVote} on this proposal.`,
+        'Already voted',
+      );
+      return;
+    }
     await this.runAction(
       () =>
         this.dao.vote(
@@ -341,18 +356,7 @@ export class LocalDao implements OnInit {
         this.selected.id,
         this.walletAddress,
       );
-      const vote = record.vote;
-      if (typeof vote === 'object' && vote !== null && !Array.isArray(vote)) {
-        if ('yes' in vote) {
-          this.walletVote = 'yes';
-        } else if ('no' in vote) {
-          this.walletVote = 'no';
-        } else {
-          this.walletVote = 'abstain';
-        }
-      } else {
-        this.walletVote = null;
-      }
+      this.walletVote = normalizeVoteChoice(record.vote);
     } catch {
       this.walletVote = null;
     }
@@ -388,10 +392,7 @@ export class LocalDao implements OnInit {
         }
       }
     } catch (err: unknown) {
-      this.toastr.showError(
-        err instanceof Error ? err.message : String(err),
-        errorTitle,
-      );
+      this.toastr.showError(humanizeContractError(err), errorTitle);
     } finally {
       this.busyAction = false;
     }
@@ -406,3 +407,23 @@ export class LocalDao implements OnInit {
     return address;
   }
 }
+
+function normalizeVoteChoice(
+  vote: VoteChoice | { yes?: null } | { no?: null } | { abstain?: null },
+): VoteChoice | null {
+  if (typeof vote === 'string') {
+    return vote;
+  }
+  if (vote && typeof vote === 'object') {
+    if ('yes' in vote) {
+      return 'yes';
+    }
+    if ('no' in vote) {
+      return 'no';
+    }
+    if ('abstain' in vote) {
+      return 'abstain';
+    }
+  }
+  return null;
+}

apps/aquachain/src/app/services/contract/contract-errors.spec.ts

@@ -0,0 +1,16 @@
+import { describe, expect, it } from 'vitest';
+import { humanizeContractError } from './contract-errors';
+
+describe('humanizeContractError', () => {
+  it('maps already voted', () => {
+    expect(humanizeContractError(new Error('Generic error: Already voted'))).toBe(
+      'You already voted on this proposal.',
+    );
+  });
+
+  it('maps voting not ended', () => {
+    expect(humanizeContractError('Voting period has not ended')).toBe(
+      'Voting is still open. Finalize after the end time.',
+    );
+  });
+});

apps/aquachain/src/app/services/contract/contract-errors.ts

@@ -0,0 +1,36 @@
+/** Map CosmWasm / RPC errors to short user-facing copy. */
+export function humanizeContractError(raw: unknown): string {
+  const text =
+    raw instanceof Error ? raw.message : typeof raw === 'string' ? raw : String(raw);
+
+  const rules: readonly [RegExp, string][] = [
+    [/Already voted/i, 'You already voted on this proposal.'],
+    [/Voting period has not ended/i, 'Voting is still open. Finalize after the end time.'],
+    [/Voting period has ended/i, 'Voting has ended. You can no longer cast a vote.'],
+    [/Already finalized|Proposal already finalized/i, 'This proposal is already finalized.'],
+    [/Proposal is not open/i, 'This proposal is no longer open for votes.'],
+    [/Quorum not reached/i, 'Quorum was not reached. This proposal failed.'],
+    [/Proposal did not pass/i, 'The proposal did not pass.'],
+    [/Missing funds|Attached funds are required/i, 'Attach the reward OSMO amount in Keplr.'],
+    [/Invalid funds|do not match the proposal reward/i, 'Attached OSMO must match the proposal reward.'],
+    [/Invalid type map/i, 'App version mismatch. Hard-refresh the page and try again.'],
+    [/Keplr extension not found/i, 'Install and unlock the Keplr extension.'],
+    [/insufficient funds|spendable balance/i, 'Not enough OSMO for gas or the attached reward.'],
+  ];
+
+  for (const [pattern, message] of rules) {
+    if (pattern.test(text)) {
+      return message;
+    }
+  }
+
+  if (text.length > 180) {
+    const generic = text.match(/Generic error: ([^:]+)/i)?.[1]?.trim();
+    if (generic) {
+      return generic;
+    }
+    return 'Transaction failed. Check Keplr and try again.';
+  }
+
+  return text;
+}