Defaults returns a Chain based on the defaults for chainID and fields from with, applied in order so later Chains override earlier ones.

DefaultsNamed returns the default Chain values, optionally for the given chainID, as well as a name if the chainID is known.

DefaultIDs is the set of chain ids which have defaults.

ChainScoped implements config.ChainScopedConfig with a gencfg.BasicConfig and EVMConfig.