Get past logs for polling votes

packages/dai-plugin-governance/src/GovPollingService.js

@@ -65,6 +65,16 @@ export default class GovPollingService extends PrivateService {
     return this.get('smartContract').getContractByName(BATCH_POLLING);
   }
 
+  // For networks without Spock, e.g. the testchain
+  async getVoteLogs(from = 0, to = 'latest') {
+    const web3 = this.get('smartContract').get('web3');
+    return web3.getPastLogs({
+      address: this._batchPollingContract().address,
+      from,
+      to
+    });
+  }
+
   //--- cache queries
 
   async getPoll(multiHash) {

packages/dai-plugin-governance/test/GovPollingService.test.js

@@ -262,3 +262,20 @@ test('ranked choice tally with multiple rounds', async () => {
     JSON.stringify(dummyBallotMultipleRoundsExpect)
   );
 });
+
+test('can get vote logs from contract', async () => {
+  const START_DATE = Math.floor(new Date().getTime() / 1000) + 100;
+  const END_DATE = START_DATE + 5000;
+  const MULTI_HASH = 'dummy hash';
+  const URL = 'dummy url';
+  const option = [1];
+  const pollId = await govPollingService.createPoll(
+    START_DATE,
+    END_DATE,
+    MULTI_HASH,
+    URL
+  );
+  await govPollingService.vote([pollId], [option]);
+  const voteLogs = await govPollingService.getVoteLogs();
+  expect(voteLogs[0].topics.length).toBe(4);
+});

yarn.lock

@@ -6229,7 +6229,7 @@ functional-red-black-tree@^1.0.1:
   resolved "https://registry.yarnpkg.com/functional-red-black-tree/-/functional-red-black-tree-1.0.1.tgz#1b0ab3bd553b2a0d6399d29c0e3ea0b252078327"
   integrity sha1-GwqzvVU7Kg1jmdKcDj6gslIHgyc=
 
-"ganache-cli@github:makerdao/ganache-cli#fix/gas-est-crash":
+ganache-cli@makerdao/ganache-cli#fix/gas-est-crash:
   version "6.4.3-beta.0"
   resolved "https://codeload.github.com/makerdao/ganache-cli/tar.gz/3e512b61da2479042627e6155231dcb038110650"
   dependencies: