stepception-template.yaml

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

Resources:

  HttpApi:
    Type: AWS::Serverless::HttpApi
    Properties:
      StageName: prod
      DefinitionBody:
        openapi: "3.0.1"
        paths:
          /:
            post:
              x-amazon-apigateway-integration:
                integrationSubtype: StepFunctions-StartSyncExecution
                credentials: !GetAtt HttpApiRole.Arn
                requestParameters:
                  Input: "$request.body"
                  StateMachineArn: !Sub arn:${AWS::Partition}:states:${AWS::Region}:${AWS::AccountId}:stateMachine:${AWS::StackName}-Stepception
                payloadFormatVersion: 1.0
                type: aws_proxy
                connectionType: INTERNET

  HttpApiRole:
    Type: AWS::IAM::Role
    Properties:
      AssumeRolePolicyDocument:
        Version: 2012-10-17
        Statement:
          - Effect: Allow
            Principal:
              Service:
              - apigateway.amazonaws.com
              - states.amazonaws.com
            Action:
              - sts:AssumeRole
      Policies:
      - PolicyName: AllowSFNExec
        PolicyDocument:
          Version: 2012-10-17
          Statement:
            - Effect: Allow
              Action: states:StartSyncExecution
              Resource: !Sub arn:${AWS::Partition}:states:${AWS::Region}:${AWS::AccountId}:stateMachine:${AWS::StackName}-Stepception

  StepceptionStateMachine:
    Type: AWS::Serverless::StateMachine
    Properties:
      Name: !Sub ${AWS::StackName}-Stepception
      Type: EXPRESS
      Role: !GetAtt HttpApiRole.Arn
      Definition:
        StartAt: Stepception
        States:
          Stepception:
            Type: Task
            Resource: arn:aws:states:::apigateway:invoke
            Parameters:
              ApiEndpoint: !Sub ${HttpApi}.execute-api.${AWS::Region}.amazonaws.com
              Method: POST
              Stage: prod
              Path: /
              AuthType: NO_AUTH
            End: true