template.yml

AWSTemplateFormatVersion: 2010-09-09
Transform: 'AWS::Serverless-2016-10-31'
Description: My ATM app which uses AWS EventBridge to route transactions to other service

Resources: 
  atmProducerFunction:
    Type: AWS::Serverless::Function
    Properties:
      CodeUri: producer/
      Handler: Producer::Producer.Function::FunctionHandler
      Runtime: dotnetcore3.1
      Policies:
        - AWSLambdaBasicExecutionRole
        - Version: '2012-10-17'
          Statement:
            - Effect: Allow
              Action:
                - events:PutEvents
              Resource:
                - '*'

  atmConsumerCase1Fn:
    Type: AWS::Serverless::Function
    Properties:
      CodeUri: consumer/
      Handler: Consumer::Consumer.Function::ConsumerCase1Handler
      Runtime: dotnetcore3.1

  atmConsumerCase2Fn:
    Type: AWS::Serverless::Function
    Properties:
      CodeUri: consumer/
      Handler: Consumer::Consumer.Function::ConsumerCase2Handler
      Runtime: dotnetcore3.1
      Events:
        Trigger:
          Type: CloudWatchEvent
          Properties:
            Pattern:
              source:
                - custom.myATMapp
              detail-type:
                - transaction
              detail:
                location:
                  - "prefix": "NY-"

  atmConsumerCase3Fn:
    Type: AWS::Serverless::Function
    Properties:
      CodeUri: consumer/
      Handler: Consumer::Consumer.Function::ConsumerCase3Handler
      Runtime: dotnetcore3.1
      Events:
        Trigger:
          Type: CloudWatchEvent 
          Properties:
            Pattern:
              source:
                - custom.myATMapp
              detail-type:
                - transaction
              detail:
                result:
                  - "anything-but": "approved"

  EventRuleCase1:
    Type: AWS::Events::Rule
    Properties:
      Description: "Approved transactions"
      EventPattern:
        source:
          - "custom.myATMapp"
        detail-type:
          - transaction
        detail:
          result:
            - "approved"
      State: "ENABLED"
      Targets:
        -
          Arn:
            Fn::GetAtt:
              - "atmConsumerCase1Fn"
              - "Arn"
          Id: "atmConsumerTarget1"

  PermissionForEventsToInvokeLambda:
    Type: AWS::Lambda::Permission
    Properties:
      FunctionName:
        Ref: "atmConsumerCase1Fn"
      Action: "lambda:InvokeFunction"
      Principal: "events.amazonaws.com"
      SourceArn:
        Fn::GetAtt:
          - "EventRuleCase1"
          - "Arn"