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Exchange8:Gateway — market access

The market-access front end: it terminates FIX 4.2 client sessions (with an OUCH binary-codec subset and BFF-proxied REST/WebSocket order shapes), runs the FIX session protocol (logon, sequence integrity, resends, heartbeats), and owns the order states above the fill. Books and fills belong to Exchange8:ME.

Use cases​

  • Member connectivity — a member firm connects over FIX 4.2 or the OUCH binary codec; sessions carry sequence integrity, resend handling, and heartbeat supervision.
  • Order lifecycle above the fill — Gateway owns new/replace/cancel acknowledgments and order-state reporting; the matching engine owns the book.
  • Web/WebSocket members — the eExchange app and API clients enter orders through the BFF-proxied shapes; the same submission pipeline runs the pre-trade risk gate.

Full documentation​

The complete detail lives in this product's sub-pages:

  • Architecture (DDD) — the full document, harvested from the unit's repository at build time.
  • Business rules (BRD) — the full document, harvested from the unit's repository at build time.
  • Security — the full document, harvested from the unit's repository at build time.
  • Overview (repo README) — the maintainer's README in the consolidated reference section.