Hi everyone! I’m trying to import an custom lambda authorizer between projects, I’ve tried many ways, like not setting an authorizer at all and hoping that the new routes will be created using the default setting in another project, or importing using the ARN like:

const authorizerFunctionArn = ssm.StringParameter.valueFromLookup(
      this,
      'authorizerFunctionArn'
    );
    const authorizerFunction = lambda.Function.fromFunctionArn(
      this,
      'AccountsAuthorizerFunction',
      Lazy.string({ produce: () => authorizerFunctionArn })
    );

(Yes, I’ve tried without the lazy loading haha) In this case, the functions are successfully attached to the authorizer, but they never really call the function when I run some endpoint. Always resulting in a instant

Internal Server Error

… Any help about this will be awesome! My last hope was the

.fromFunctionName

, but this was added in CDK 2.14 (We are not there yet, I know! hahaha)

Well, the (good?) news is that

.fromFunctionName

wont make a difference, it does the exact same thing as the arn, but makes a couple assumptions.

Thank you Derek. Yeah, I had a feeling that the

fromFunctionName

won’t be a solution 😕 Anyway, I’m attaching the authorizer to an HTTP API Gateway imported from another project too, like this:

const mainApiId = ssm.StringParameter.valueFromLookup(this, 'mainApiId');

    const httpApi = HttpApi.fromHttpApiAttributes(this, 'AccountsApi', {
      httpApiId: Lazy.string({ produce: () => mainApiId }),
    });

copy pasted arn instead of the ssm

valueFromLookup

works? That’s a new one…

Yes, I’m pretty sure it’s the same data, I’ve used some logs to check that, I was able to import the API using this method, only the authorizer failed… Anyway I’ve solved setting the fixed

functionName

in the original project and building manually the import path changing only what matters:

const authorizerFunction = lambda.Function.fromFunctionArn(
      this,
      'ContactAuthorizerFunction',
      `arn:aws:lambda:${scope.region}:${scope.account}:function:mainAuthorizerFunction`
    );