Bootnode to use the network directory #1378
Description
Description
Lighthouse has a global datadir cli param. The beacon node uses this and creates a DATA_DIR/network directory and stores the identity key as well as the local ENR.
A new subcommand for lighthouse boot-node creates a discovery server but generates a new network identity and ENR each run. This is not conducive to spinning up testnets. We would like it also to read from the DATA_DIR/network directory and use the ENR and local identity key.
It may be an interesting exercise to see how the beacon_node does logic and duplicate it in the boot_node subcommand. I imagine we can borrow some of the functions used in the beacon_node for the boot node.