How to get the Alias ARN for the KMS Key?

[rafaelrcamargo]

I want to get the Alias ARN from a newly created KMS key on my Stack:

const key = new Key(this, "app_key")
const alias = new Alias(this, "app_key_alias", {
    aliasName: "app/key",
    targetKey: key
})

And following this example: (https://github.com/aws/aws-encryption-sdk-javascript/blob/master/modules/example-node/src/kms_simple.ts), I would need my Key ARN and my Alias ARN so I could encrypt and decrypt things on my lambda.

• tldr; How to get the Key and Alias ARN for the KMS so it can be passed as envs for the lambda