Type Alias BaseEventTypeMap

Type Declaration

• alb: ALBEvent

• cloudfront: CloudFrontRequestEvent

• cloudwatch-logs: CloudWatchLogsEvent

• cognito-userpool: CognitoUserPoolTriggerEvent

• dynamodb: DynamoDBStreamEvent

• eventbridge: EventBridgeEvent<string, unknown>

• firehose: FirehoseTransformationEvent

• http: APIGatewayProxyEventV2

• kinesis: KinesisStreamEvent

• rest: APIGatewayProxyEvent

• s3: S3Event

• ses: SESEvent

• sns: SNSEvent

• sqs: SQSEvent

• step: { Payload?: unknown; [key: string]: unknown }

  Step Functions → Lambda (Service Integration: Lambda Invoke)

  When Step Functions invokes Lambda via the AWS SDK integration (e.g., "arn:aws:states:::lambda:invoke"), the event received by the Lambda handler is an object that wraps the original input under a "Payload" key. The Payload is already parsed JSON.

  Notes:

  • We accept additional keys (e.g., StatusCode/ExecutedVersion in some patterns) via passthrough.
  • For the common “request/response” integration where Step Functions passes state directly, apps can still treat the event via their own app-local event map if needed.