Serban Macrineanu

**Describe the bug** The get_reward() function from arweave_lib.py fails randomly because of poor variable usage. My guess is that the following code fails when the status.code is different than 200....

When I'm creating a collection using the Arweave storage, every once in a while it fails with this error: ``` uploading file: /mnt/c/Users/user/Documents/nft-assets/images/147.png of format: png Traceback (most recent call...