template.yml

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

Resources:

  TransactionsTable:
    Type: AWS::DynamoDB::Table
    Properties:
      TableName: !Sub transactions-${AWS::StackName}
      AttributeDefinitions:
        - AttributeName: transaction_id
          AttributeType: S
      KeySchema:
        - AttributeName: transaction_id
          KeyType: HASH
      BillingMode: PAY_PER_REQUEST

  PaymentFunction:
    Type: AWS::Serverless::Function
    Properties:
      Handler: lambdas/process_payment.lambda_handler
      Runtime: python3.12
      CodeUri: .
      Environment:
        Variables:
          TRANSACTIONS_TABLE: !Sub transactions-${AWS::StackName}
      Policies:
        - DynamoDBCrudPolicy:
            TableName: !Sub transactions-${AWS::StackName}
      Events:
        PaymentAPI:
          Type: Api
          Properties:
            Path: /pay
            Method: post

Outputs:
  PaymentApiUrl:
    Description: "API Gateway endpoint URL for Prod stage"
    Value: !Sub "https://${ServerlessRestApi}.execute-api.${AWS::Region}.amazonaws.com/Prod/pay"