Flash-Sale Lab
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Customer journey

Reserve with a live system view

Two-Phase Reservation demo with 120s hold countdown, background sweeper expiration, and double-spend race protection.

Demo session only; no login or real authentication is used.

No reservation

Tết Peak Train SE1 — VIP 4-Berth Sleeper

Jun 06, 2026 · Saigon Central Railway Station · ₫280,000

Available

—

Reserved

—

Confirmed

—

Waiting for live inventory from the API

System X-Ray

Only states observed from the reservation API are shown.

  1. Durable state

    Waiting for API state

  2. Outcome

    Pending

  3. Operation

    Waiting for API state

  4. Order

    Not created

Try another outcome

Use these controls to exercise replay, expiry, sold-out and admission paths against the live API.

6
Distributed Architecture Pipeline· Observing: POST /api/v1/reservations
Engineering evidence: legacy order probe
LimitedTicket ID 16

Tết Peak Train SE1 — VIP 4-Berth Sleeper

Two-Phase Reservation demo with 120s hold countdown, background sweeper expiration, and double-spend race protection.

When
Jun 06, 2026 | 19:30
Where
Saigon Central Railway Station | Ho Chi Minh City

Flash price

₫280,000

Regular ₫1,400,000

n/a available100 berths
Initial stock
n/a
Prepared
Needs warmup
Sale window
n/a

Order probe

Submit one controlled order request and observe how the selected strategy changes stock.

Advanced lab settings

Restores Redis stock when DB/order write fails.

6
Distributed Architecture Pipeline· Observing: POST /orders (REDIS_LUA_WITH_COMPENSATION)

Controlled system evidence

Open the benchmark and consistency tools when the customer journey needs an operator-level view.

BenchmarkConsistencyControl desk