How to send event data to Slack via sensor?

[s-cho-25]

Here are event source and sensor:

apiVersion: argoproj.io/v1alpha1
kind: EventSource
metadata:
  name: workflow-events
  namespace: argo-events
spec:
  template:
    serviceAccountName: argo
  resource:
    workflow-completed-succeeded:
      namespace: ns1
      group: argoproj.io
      version: v1alpha1
      resource: workflows
      eventTypes:
        - UPDATE
      filters:
        data:
          - path: body.status.phase
            type: string
            value:
              - Succeeded

    workflow-completed-failed:
      namespace: ns1
      group: argoproj.io
      version: v1alpha1
      resource: workflows
      eventTypes:
        - UPDATE
      filters:
        data:
          - path: body.status.phase
            type: string
            value:
              - Failed
---
apiVersion: argoproj.io/v1alpha1
kind: Sensor
metadata:
  name: workflow-slack-sensor
  namespace: argo-events
spec:
  dependencies:
    - name: succeeded
      eventSourceName: workflow-events
      eventName: workflow-completed-succeeded
      filters:
        data:
          - path: body.status.phase
            type: string
            value:
              - Succeeded

    - name: failed
      eventSourceName: workflow-events
      eventName: workflow-completed-failed
      filters:
        data:
          - path: body.status.phase
            type: string
            value:
              - Failed

  triggers:
    - template:
        name: slack-succeeded
        slack:
          slackToken:
            name: slack-secret
            key: token
          channel: general
          message: |
            Workflow *{{workflow.name}}* completed successfully!!
            View: https://argo-workflows.domain/workflows/{{workflow.ns}}/{{workflow.name}}
      parameters:
        - src:
            dependencyName: succeeded
            dataKey: body.metadata.name
          dest: workflow.name
        - src:
            dependencyName: succeeded
            dataKey: body.metadata.namespace
          dest: workflow.ns
      conditions: slack-succeeded
      dependencies: ["succeeded"]

    - template:
        name: slack-failed
        slack:
          slackToken:
            name: slack-secret
            key: token
          channel: general
          message: |
            Workflow *{{workflow.name}}* failed!!
            View: https://argo-workflows.domain/workflows/{{workflow.ns}}/{{workflow.name}}
      parameters:
        - src:
            dependencyName: failed
            dataKey: body.metadata.name
          dest: workflow.name
        - src:
            dependencyName: failed
            dataKey: body.metadata.namespace
          dest: workflow.ns
      conditions: slack-failed
      dependencies: ["failed"]

I have two questions:

1. How to parse an event message in an Argo Events sensor so it can be sent to Slack?

After send message to Slack, the variable didn't been parsed to real event data.

Workflow {{workflow.name}} completed successfully!!
View: https://argo-workflows.domain/workflows/{{workflow.ns}}/{{workflow.name}}

How to parse event metadata correctly?

2. How to create two triggers to monitor success and failure using an Argo Events sensor?

Then the slack sensor's pod log:

{"level":"info","ts":"2025-05-16T05:55:20.153605383Z","logger":"argo-events.sensor","caller":"sensor/trigger_conn.go:271","msg":"trigger conditions not met","sensorName":"workflow-slack-sensor","triggerName":"slack-failed","clientID":"client-4020354806-38","meetDependencies":["succeeded"],"meetEvents":["efa34dd7b3bc42bf88e79f62889a62a4"]}
{"level":"info","ts":"2025-05-16T05:55:20.154719315Z","logger":"argo-events.sensor","caller":"sensor/trigger_conn.go:271","msg":"trigger conditions not met","sensorName":"workflow-slack-sensor","triggerName":"slack-succeeded","clientID":"client-798657282-1","meetDependencies":["succeeded"],"meetEvents":["efa34dd7b3bc42bf88e79f62889a62a4"]}

Both the slack-failed and slack-successed triggers are being triggered after a task successfully finishes. Why is that happening?