AWSTemplateFormatVersion: '2010-09-09'
Transform: AWS::Serverless-2016-10-31
Description: Creates a Lambda function that writes to an S3 bucket
Parameters:
  DestinationBucketName:
    Type: String
Resources:
  ## S3 bucket
  DestinationBucket:
    Type: AWS::S3::Bucket
    Properties:
      BucketName: !Ref DestinationBucketName    
  ## Lambda function
  PutObjectFunction:
    Type: AWS::Serverless::Function 
    Properties:
      CodeUri: src/
      Handler: app.lambda_handler
      Runtime: python3.8
      MemorySize: 128
      Environment:
        Variables:
          DestinationBucketName: !Ref DestinationBucketName
      Policies:
        - S3CrudPolicy:
            BucketName: !Ref DestinationBucketName