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Journeys

Journeys are visual graphs that fire when an event happens (or a player enters a segment). Drag-and-drop graph editor (React Flow) with seven node types.

Node types​

TypeBehavior
triggerEntry — references an event name (or segment_entry). Auto-created from the trigger config.
waitHold for a duration (duration_ms) OR until an event fires (until_event with timeout).
send_messageRender template + provider, enqueue a message_send.
conditionBranch on a player trait. Operators: =, !=, >, >=, <, <=, exists. Two outgoing edges (if_true_next, if_false_next).
grant_bonusIssue a bonus template. Optional deposit_amount_source for deposit_match types.
call_webhookHTTP POST to an external URL with Mustache-rendered body + optional HMAC signature. Branches on success / failure.
endTerminal — journey run completes.

Triggers​

Three trigger kinds:

  • Event trigger — trigger.event = "deposit_confirmed". Journey fires for every event matching the name in the project. Optional property filter (trigger.where).
  • Segment entry — trigger.segment_id = "..." + trigger.kind = "segment_entry". Fires when a player gains membership in the segment.
  • Manual / API — POST /v1/journeys/:id/trigger { player_id } for testing or programmatic kickoff.

Graph constraints​

  • Max 50 nodes per journey
  • Every node must have a unique id
  • start_node_id must reference an existing node
  • Cycles are detected at save time (depth limit = 50)

Wait nodes​

Two waiting modes:

{
  "id": "wait_24h",
  "type": "wait",
  "duration_ms": 86400000,    // wait fixed duration (24h)
  "next": "send_welcome"
}
{
  "id": "wait_for_deposit",
  "type": "wait",
  "until_event": {
    "event": "deposit_confirmed",
    "timeout_ms": 604800000   // 7 days
  },
  "next": "send_thanks"
}

until_event is the journey's event-listening primitive — wait up to N ms for the player to do event_name; if timeout fires first, follow next anyway.

Webhook nodes (Sprint 18)​

{
  "id": "anti_fraud_check",
  "type": "call_webhook",
  "url": "https://anti-fraud.example.com/check",
  "method": "POST",
  "body_template": "{\"player_id\":\"{{player.id}}\",\"run\":\"{{journey.run_id}}\"}",
  "hmac_secret_env": "ANTI_FRAUD_HMAC_SECRET",
  "timeout_ms": 3000,
  "next_node_id": "grant_bonus_after_check",
  "on_failure_next_node_id": "skip_bonus"
}

The webhook firer:

  • Renders Mustache body against { player, journey } context
  • Signs with HMAC-SHA256 over <timestamp>.<body> (matches our inbound webhook scheme — same secret usable on both legs)
  • Bounded timeout (≤10s)
  • 2xx → next_node_id; non-2xx / timeout / network error → on_failure_next_node_id (or fail journey if not set)
  • https:// only — refuses plain HTTP to avoid leaking journey context

Common patterns​

  • Welcome series: trigger signup → wait 24h → send_message email → wait 7d (or until deposit_confirmed) → grant_bonus.
  • Win-back: segment_entry "7d inactive" → send_message push → wait 3d → condition (deposit since?) → if not, send_message email with bonus link.
  • VIP onboarding: trigger tier_promoted to platinum → call_webhook (notify VIP host system) → send_message congrats email.
  • Risk gate: trigger deposit_initiated → call_webhook (anti-fraud) → on_failure: condition (held by anti-fraud?) → grant_bonus only if cleared.