How can I inject a Terraform resource into my Lambda code?

Question

I've got a Terraform file that creates an AWS Lambda and an AWS SNS Topic. The lambda sends a message to the SNS topic. At the moment I have hardcoded the ARN for the SNS Topic in the lambda. Is there anyway of getting the lambda to pickup the ARN from Terraform instead?

Answer 1

I would create an environment variable for your lambda containing the ARN of your SNS topic. Then lambda function can read that variable and use it accordingly.