eth2.0-specs/tests/core/pyspec/eth2spec/config/README.md

Consensus specs config util

For run-time configuration, see Configs documentation.

For compile-time presets, see Presets documentation and the build-targets flag for the pyspec distutils command.

Config usage:

from eth2spec.config import config_util
from eth2spec.phase0 import mainnet as spec
from pathlib import Path

# To load the default configurations
config_util.load_defaults(Path("consensus-specs/configs"))  # change path to point to equivalent of specs `configs` dir.
# After loading the defaults, a config can be chosen: 'mainnet', 'minimal', or custom network config (by file path)
spec.config = spec.Configuration(**config_util.load_config_file(Path('mytestnet.yaml')))

Note: previously the testnet config files included both preset and runtime-configuration data. The new config loader is compatible with this: all config vars are loaded from the file, but those that have become presets can be ignored.