Reading AWS Param Store from Lambda-CodePudding

First foray into AWS's Lambda@Edge and trying to retrieve secrets from AWS Param Store for authentication (following this article) but getting nothing back.

Here's the function that calls the AWS.SSM function:

    const fromParameterStore = async(key, withDecryption = false) => {
        const { Parameter } = await ssm.getParameter({ Name: key, WithDecryption: withDecryption }).promise();
        return Parameter.Value;
    };

And here's how it's called from the main body of the Lambda:

    exports.handler = async (event, context, callback) => {
        const request = event.Records[0].cf.request;
        const testValue = fromParameterStore('my-param-key');
        console.log("test value = " testValue);
        console.log("test value = " JSON.stringify(testValue));
        ...

The output in the log is just this:

testvar = [object Promise]
testvar = {}

How can I cleanly de-reference the Promise in this case to get the actual secret out for use in the rest of the Lambda?

Thanks!

CodePudding user response：

Your fromParameterStore function is asynchronous, so it will return a Promise. You will have to wait for this promise to be fulfilled, meaning you will have to use await when calling fromParameterStore function:

const testValue = await fromParameterStore('my-param-key');