I’ve created a lambda function using AWS cdk library and I would like to subscribe it to a SNS topic.

This lambda function is an instance of NodejsFunction construct, which is an implementation of IFunction. I’ve also created a topic in cdk and I am calling the method addSubscription(new LambdaSubscription(myLambda)). However, I’m encountering the error

this.fn.addPermission is not a function at LambdaSubscription.bind

LambdaSubscription expects an object which implements the interface IFunction. Therefore, I’m not understanding this error as NodejsFunction has a method addPermission.

Here a wider code snippet:

    const lambdaProcessMessage = new NodejsFunction(this, 'LambdaProcessMessage', {
        props}
    })

    const topic = new Topic(this, "TopicSNSGlueJobsError", {
        topicName: 'topicGlueJobsErrorIngestion'
    })

    topic.addToResourcePolicy(new PolicyStatement({
        resources: [topic.topicArn],
        actions: ["sns:Publish"],
        effect: Effect.ALLOW,
        principals: [new ServicePrincipal("events.amazonaws.com")]
    }))

   topic.addSubscription(new LambdaSubscription(lambdaProcessMessage))