Global Events Reader Block

Subscribes to global topics and routes incoming events into policy branches.

• Can subscribe to multiple global topics.

• Reads/handles messages only from topics with Active = ON (OFF = ignore this topic).

• Lets you control subscriptions per topic/stream in the Reader UI:

• Active ON/OFF — ON = read/process, OFF = ignore.

• Hidden (optional) — stays in configuration but is hidden in UI.

• Routes an event into a branch only if validations pass:

• Document type matches branch configuration.

• If configured, the schema matches / validates for that branch.

• If applicable, field filters match.

• Applies filters only for VC, and only when Admin configured a schema for the branch.

1.1 Properties

Property Name	Description	Example
Default Active (in the block Meta Data)	controls the visibility in the runtime UI	Checked/Unchecked
Show Next button	enable to use this block inside a Step container.	Checked/Unchecked
Global topics	the list of default topicIds that Admin adds to the block configuration	0.0.750....
Active by default	controls the visibility of topicID	Checked/Unchecked
Branch event	output event name to trigger	branch 1
Document type	expected type for this branch (VC / JSON / CSV / TEXT / ANY)	VC
Schema (optional)	local policy schema used for VC validation before routing.	Registrant & Participant

Events tab - setting output events to the branches.

1.2 API

• Uses the standard policy blocks API (setData), same as other blocks.

• Reader/Writer don’t introduce a new API — they only define their own payload format and supported operation values.

Reader payload (Update streams):
{
  "operation": "Update",
  "value": {
    "streams": [
      {
        "globalTopicId": "0.0.7559767",
        "active": true,
        "branchDocumentTypeByBranch": { "branch 1": "vc", "branch 2": "vc" },
        "filterFieldsByBranch": {}
      }
    ]
  }
}