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eth2.0-specs/configs/constant_presets/README.md

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Constant Presets

This directory contains a set of constants presets used for testing, testnets, and mainnet.

A preset file contains all the constants known for its target. Later-fork constants can be ignored, e.g. ignore phase1 constants as a client that only supports phase 0 currently.

Format

Each preset is a key-value mapping.

Key: an UPPER_SNAKE_CASE (a.k.a. "macro case") formatted string, name of the constant.

Value can be either:

  • an unsigned integer number, can be up to 64 bits (incl.)
  • a hexadecimal string, prefixed with 0x

Presets may contain comments to describe the values.

See mainnet.yaml for a complete example.