MustReplaceDataDir is used in sf-ethereum-priv.

Should be the number of blocks between two targets before we consider the first as "near" the second.

Data storage default locations.

This should be the standard name of the executable that is usually used to sync the chain with the blockchain network.

This should be the block number of the first block that is streamable using Firehose, for example on Ethereum it's set to `0`, the genesis block's number while on EOSIO it's set to 2 (genesis block is 1 there but our instrumentation on this chain instruments only from block #2).

Common ports.

Those should be the port the native node is using for P2P and RPC respectively and importantly, they should be different than the `reader` ones above.

Firehose chain specific port The initial 18XXX prefix is different for every chain supported by Firehose.

Those should be the port the native node is using for P2P and RPC respectively and importantly, they should be different than the `node` ones below.