Tech Stack

Layer	Technology
Runtime	Cloudflare Workers (Edge computing)
State	Durable Objects with SQLite
Language	TypeScript (strict mode)
Routing	itty-router
Testing	Vitest
Deployment	Wrangler
Data Source	Hyperliquid API + WebSocket

Project Structure

Entry Points & Routing

• apps/backend/src/index.ts — Main worker export
• apps/backend/src/endpoints/_router.ts — itty-router setup
• apps/backend/src/endpoints/*.ts — API endpoints (price, allMids, clearinghouseState, healthcheck, portfolio)

Utilities & Constants

• apps/backend/src/utils/ — BigNumber, binary shard encoding, compression library
• apps/backend/src/constants/ — Asset definitions (26 pairs), fee tiers, geo-fallbacks

Testing

• apps/backend/test/durables/ — DO integration tests (630+ tests)
• apps/backend/test/utils/ — Utility tests
• apps/web/e2e/ — Web API tests (Vitest + Playwright)

Auto-Generated Types

• packages/ace-trader/ — Auto-generated type exports — do not edit manually

See Type Exports for details.