I think the best approach for now is if the

sst.Topic

construct exposed the `sns.Subscription`s it created internally, and you can the CloudFormation resource from it and set the

deliveryPolicy

at the CloudFormation level. It would look something like:

const topic = sst.Topic(...);
topic.snsSubscriptions[0].node.defaultChild.deliveryPolicy = {
  throttlePolicy: { "maxReceivesPerSecond": 10 }
};

Just to add a bit of context,

.node.defaultChild

gives you the low level CloudFormation resource

Would that work for you?

I will have that included in the next release.

I put together some code sample. This sets the

maxReceivesPerSecond

to the first subscriber for the topic.

const topic = new sst.Topic(stack, "Topic", {
    subscribers: ["test/lambda.handler"],
  });
  const subscription = topic.snsSubscriptions[0];
  const cfnSub = subscription.node.defaultChild as sns.CfnSubscription;
  cfnSub.deliveryPolicy = {
    throttlePolicy: { "maxReceivesPerSecond": 10 }
  };