serverless.yml

service: orders-lambda
frameworkVersion: "3"

provider:
  name: aws
  runtime: nodejs16.x
  region: ap-southeast-2
  apiGateway:
    apiKeys:
      - orders-api-key

functions:
  orders-api:
    handler: orders-lambda/api.createOrder
    role: LambdaRole
    events:
      - httpApi:
          path: /order
          method: post
    environment:
      QUEUE_URL: !Ref OrderProcessorQueue
  orders-processor:
    handler: orders-lambda/processor.processOrder
    role: LambdaRole
    events:
      - sqs:
          arn:
            Fn::GetAtt:
              - OrderProcessorQueue
              - Arn

resources:
  Resources:
    LambdaRole:
      Type: AWS::IAM::Role
      Properties:
        RoleName: LambdaRole
        AssumeRolePolicyDocument:
          Version: "2012-10-17"
          Statement:
            - Effect: Allow
              Principal:
                Service:
                  - lambda.amazonaws.com
              Action: sts:AssumeRole
        Policies:
          - PolicyName: LogsPolicy
            PolicyDocument:
              Version: "2012-10-17"
              Statement:
                - Effect: Allow
                  Action:
                    - logs:CreateLogGroup
                    - logs:CreateLogStream
                    - logs:PutLogEvents
                    - lambda:CreateEventSourceMapping
                    - lambda:ListEventSourceMappings
                    - lambda:ListFunctions
                  Resource: "*"
          - PolicyName: SqsPolicy
            PolicyDocument:
              Version: "2012-10-17"
              Statement:
                - Effect: Allow
                  Action:
                    - sqs:DeleteMessage
                    - sqs:GetQueueAttributes
                    - sqs:ReceiveMessage
                    - sqs:SendMessage
                  Resource:
                    - Fn::GetAtt:
                        - OrderProcessorQueue
                        - Arn
                    - Fn::GetAtt:
                        - OrderProcessorDeadLetterQueue
                        - Arn

    OrderProcessorQueue:
      Type: AWS::SQS::Queue
      Properties:
        KmsMasterKeyId: alias/aws/sqs
        RedrivePolicy:
          deadLetterTargetArn:
            Fn::GetAtt:
              - OrderProcessorDeadLetterQueue
              - Arn
          maxReceiveCount: 5

    OrderProcessorDeadLetterQueue:
      Type: AWS::SQS::Queue
      Properties:
        KmsMasterKeyId: alias/aws/sqs
        MessageRetentionPeriod: 1209600

plugins:
  - serverless-plugin-typescript
  - serverless-offline