fix(epoch): use epochZeroStartTimestamp to determine if you should tr…

[dtfiedler]

…y and submit a report

The current error:

info: Listening on port 5050 {"timestamp":"2025-02-20T07:07:12.583Z"}
info: Generating report... {"timestamp":"2025-02-20T07:07:13.237Z"}
error: Error generating report Cannot destructure property 'startTimestamp' of '(intermediate value)' as it is undefined. {"stack":"TypeError: Cannot destructure property 'startTimestamp' of '(intermediate value)' as it is undefined.\n    at ContractEpochSource.getEpochParams (file:///Users/dylanfiedler/Documents/ario/ar-io/ar-io-observer/src/epochs/contract-epoch-source.ts:49:17)\n    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)\n    at async Observer.generateReport (file:///Users/dylanfiedler/Documents/ario/ar-io/ar-io-observer/src/observer.ts:279:37)\n    at async updateAndSaveCurrentReport (file:///Users/dylanfiedler/Documents/ario/ar-io/ar-io-observer/src/system.ts:259:24)","timestamp":"2025-02-20T07:07:13.941Z"}

This happens because we expect epoch to be defined in the ContractSource. If we have not created any epochs, the destructing of the empty epoch throws the error.

Checking the epochZeroStartTimestamp is a better way to indicate if/when epochs should be created.

With the fix:

info: Using wallet 1H7WZIWhzwTH9FIcnuMqYkTsoyv1OTfGa_amvuYwrgo {"timestamp":"2025-02-20T07:07:47.527Z"}
info: Loading key file... {"keyFile":"wallets/1H7WZIWhzwTH9FIcnuMqYkTsoyv1OTfGa_amvuYwrgo.json","timestamp":"2025-02-20T07:07:47.530Z"}
info: Key file loaded {"keyFile":"wallets/1H7WZIWhzwTH9FIcnuMqYkTsoyv1OTfGa_amvuYwrgo.json","timestamp":"2025-02-20T07:07:47.530Z"}
info: Using process PklI5-ORsL310QNAwh-LMcFycFxPkJ67MmoriUCaL3I to fetch contract information {"processId":"PklI5-ORsL310QNAwh-LMcFycFxPkJ67MmoriUCaL3I","timestamp":"2025-02-20T07:07:47.543Z"}
info: SUBMIT_CONTRACT_INTERACTIONS is false - contract interactions will not be saved {"timestamp":"2025-02-20T07:07:47.552Z"}
info: Listening on port 5050 {"timestamp":"2025-02-20T07:07:47.604Z"}
info: First epoch has not started yet. Not generating report. {"timestamp":"2025-02-20T07:07:48.261Z"}