Amazon Pinpoint - Custom Channel Lambda function (YAML)

template.yml

AWSTemplateFormatVersion : '2010-09-09'
Transform: AWS::Serverless-2016-10-31
Resources:

  myHookFunction:
    Type: AWS::Serverless::Function
    Properties:
      Handler: index.handler
      # ... 
      # all the other properties here
      # ...

  myPinpointApp:
    Type: AWS::Pinpoint::App
    Properties: 
      Name: MySampleApp

  myPinpointSegment:
    Type: AWS::Pinpoint::Segment
    Properties: 
      ApplicationId: !Ref myPinpointApp
      Name: 'My segment'

  myPinpointCampaign:
    Type: AWS::Pinpoint::Campaign
    Properties: 
      ApplicationId: !Ref myPinpointApp
      SegmentId: !GetAtt myPinpointSegment.SegmentId
      MessageConfiguration: {...}
      CampaignHook: 
        LambdaFunctionName: !Ref myHookFunction
        Mode: DELIVERY
      Schedule: 
        StartTime: '2019-11-01T15:00:00.000'
        TimeZone: UTC
        # ... 
        # all the other properties here
        # ...