History Payload Validator

Master Contract Precheck

• Ensure master contracts exist for the exchange:
  • If missing: run the platform’s master contract download/refresh step.
  • Re-test history after refresh.

Manual Test Template

curl -X POST http://127.0.0.1:5001/api/v1/history \
  -H "Content-Type: application/json" \
  -d '{
    "symbol": "NIFTY",
    "exchange": "NSE",
    "interval": "5m",
    "start_date": "2026-01-29",
    "end_date": "2026-01-29",
    "resolution": "5"
  }'

• If this passes, align strategy payload builders to match.

Debug Workflow

1. Read the failing log entry to see which fields were rejected.
2. Open the strategy payload builder and confirm every required field is populated.
3. Validate interval value against allowed list.
4. Confirm symbol exists in master contracts (and exchange matches).
5. Re-run the manual test; then restart the strategy.

Preventive Steps

• Add unit-style checks in strategy code to assert payload completeness before calling history.
• Default to a safe interval (e.g., 5m) when config is missing.
• Log the payload (without secrets) when a 400 occurs to speed up triage.