Motivation

We want the ability to download the state from multiple checkpoint nodes when performing a checkpoint sync then compare the downloaded states failing if any of them are different

Description

• The flag --checkpoint-sync-url now parses a comma separated list of urls then fetch the state from each node finally compare them if any of them is different to the rest the program exits.

Note

• When testing most checkpoint nodes returned error 500 when calling /eth/v1/beacon/deposit_snapshot as this endpoint will be deprecated in the Electra fork. For this reason I didn't add the comparison when downloading the snapshot as it was hard to find two nodes that agreed in the result.

How to try it

rm -rf level_db/mainnet

iex -S mix run -- --checkpoint-sync-url "https://mainnet-checkpoint-sync.stakely.io, https://sync.invis.tools"  --discovery-port 9009 --mode full

Closes #1085