Validation: #1 Rails scaffold + Kalshi API client
Ticket
#1 Rails app scaffold with Kalshi API client (5pt, Sprint 1)
Shipped: Rails 8 scaffold with KalshiClient service using RSA-PSS authentication, rate limiting, and market/portfolio/order endpoints.
Environment
Local development — this is a scaffold ticket. Production deployment is Sprint 2 scope (Kustomize #9, CI/CD #11). Validation covers code correctness, test suite, and app boot.
Checks
| # | Criterion | How to Verify | Result | Evidence |
|---|---|---|---|---|
| 1 | Rails app structure exists | Check for Gemfile, config/application.rb, app/ directories | PASS | Standard Rails 8 structure: controllers, jobs, models, services directories present |
| 2 | App boots cleanly | <code>bin/rails runner "puts 'OK'"</code> | PASS | Prints OK with no errors |
| 3 | Test suite passes | <code>bin/rails test</code> | PASS | 20 tests, 50 assertions, 0 failures, 0 errors |
| 4 | KalshiClient RSA-PSS auth | Test round-trip RSA-PSS signature verify | PASS | Tests cover signature generation + verification, auth headers (KALSHI-ACCESS-KEY, KALSHI-ACCESS-TIMESTAMP, KALSHI-ACCESS-SIGNATURE), credential validation raises AuthenticationError |
| 5 | API endpoint coverage | Review KalshiClient methods | PASS | Markets (markets, market, orderbook), portfolio (balance), orders (create_order), exchange status. Generic get/post for extensibility. |
| 6 | Rate limiting | Test rate limit enforcement | PASS | Sliding-window rate limiting: 20 read/sec, 10 write/sec per Kalshi Basic tier |
| 7 | Error handling | Test 401/429/5xx responses | PASS | Tests cover authentication errors, rate limit responses, and server errors |
Verdict
PASS — all 7 checks green. Scaffold is complete and functional. Production deployment validation will occur under Sprint 2 tickets (#9 Kustomize, #11 CI/CD).
Discovered Issues
None. The
events endpoint is not a dedicated method but accessible via generic get — adequate for scaffold scope.