getPresignedUrl does not attach endpoint w/ region to url in Wasabi

Question

I am trying to generate a presignedUrl for objects in a Wasabi bucket (not the actual Amazon S3) using the S3 API. I have it generating the URL, but for some reason, it's not adding the region/endpoint to the URL.

So, instead of https://s3.us-central-1.wasabisys.com/bucket/filepath I get https://bucket/filepath

Here is my code:

exports.getPresignedUrl = functions.https.onCall(async (data, ctx) => {
  const wasabiObjKey = `${data.bucket_prefix ? `${data.bucket_prefix}/` : ''}${data.uid.replace(/-/g, '_').toLowerCase()}/${data.uid.replace(/-/g, '_').toLowerCase()}${data.variation ? `_${data.variation.replace(/\./g, '').toLowerCase()}` : ''}.zip`
  const { S3Client, GetObjectCommand } = require('@aws-sdk/client-s3')
  const s3 = new S3Client({
    bucketEndpoint: ee_products_bucket_endpoint,
    region: functions.config().s3_bucket.region,
    credentials: {
      secretAccessKey: functions.config().s3.secret,
      accessKeyId: functions.config().s3.access_key
    }
  })
  const command = new GetObjectCommand({
    Bucket: functions.config().s3_bucket.name,
    Key: wasabiObjKey,
  })
  const { getSignedUrl } = require("@aws-sdk/s3-request-presigner")
  try {
    const url = getSignedUrl(s3, command, { expiresIn: 60 })
    return url
  }
  catch(err) {
    return `Error: ${err}`
  }
})

Answer 1

I finally figured out the solution, and it was that functions.config().s3_bucket.endpoint was present online - but I didn't deploy it to the .runtimeconfig.json in my emulators, so the string was null.

The command to env vars locally to test:

Windows:

firebase functions:config:get | ac .runtimeconfig.json

OSX:

firebase functions:config:get > .runtimeconfig.json