Blockchain Release: Snapshots over S3

The core developers have tagged a new 2021.05.22.0 Hotspot firmware release which adds S3 download functionality for snapshots and updates the blessed snapshot to 855361. This is an optional, but recommended upgrade for all miners and will be automatic for all Hotspots using the Helium firmware when we GA.

blockchain-core#810: Pull snapshots from S3

This change allows blockchain participants to attempt to download a snapshot file from S3 and install it. If that fails, it will fall back to the current code path. Additionally, it exposes a CLI interface to attempt to grab a snapshot from the p2p code path and save it to a specified file.

Plan

We have been beta testing 2021.05.22.0 since May 22nd, 2021 5:30 PM PT. Current ETA for GA is 12:30 PM PT, May 23rd, 2021.