如何在 AWS 中获取纪元时间步骤 Function

Question

We can refer to the current time in AWS Step functions using "$$.State.EnteredTime", But that gives the ISO format. Is there a way to get the Epoch seconds/milliseconds? I want to add the TTL value in the DynamoDB based on that.

Is this possible? Or do I have to invoke a Lambda function only for the timestamp?

Answer 1

This requires a Lambda Invoke Task . A small set of value transformations (eg string interpolation, JSON parsing) are natively handled by Intrinsic Functions . Most value transforms, however, including date manipulation, require an external task resource like Lambda.

"EpochExecutionTimeLambda": {
  "Type": "Task",
  "ResultPath": "$.epoch",
  "Resource": "arn:aws:lambda:us-east-1:...",
  "Parameters": {
    "dateTime.$": "$$.State.EnteredTime"
  }

The lambda handler is of course trivial:

exports.handler = async (event) => new Date(event.dateTime).valueOf()