eth2.0-specs/configs/mainnet/phase1.yaml

# Mainnet preset - phase 1

CONFIG_NAME: "mainnet"

# phase1-fork
# ---------------------------------------------------------------
PHASE_1_FORK_VERSION: 0x01000000
# [STUB]
PHASE_1_FORK_SLOT: 0
INITIAL_ACTIVE_SHARDS: 64


# beacon-chain
# ---------------------------------------------------------------
# Misc
# 2**10 (= 1,024)
MAX_SHARDS: 1024
# 2**7 (= 128)
LIGHT_CLIENT_COMMITTEE_SIZE: 128
# 2**3 (= 8)
GASPRICE_ADJUSTMENT_COEFFICIENT: 8

# Shard block configs
# 2**20 (= 1048,576) bytes
MAX_SHARD_BLOCK_SIZE: 1048576
# 2**18 (= 262,144) bytes
TARGET_SHARD_BLOCK_SIZE: 262144
# Note: MAX_SHARD_BLOCKS_PER_ATTESTATION is derived from the list length.
SHARD_BLOCK_OFFSETS: [1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233]
# len(SHARD_BLOCK_OFFSETS)
MAX_SHARD_BLOCKS_PER_ATTESTATION: 12
# 2**12 (= 4,096)
BYTES_PER_CUSTODY_CHUNK: 4096
# ceillog2(MAX_SHARD_BLOCK_SIZE // BYTES_PER_CUSTODY_CHUNK)
CUSTODY_RESPONSE_DEPTH: 8

# Gwei values
# 2**14 (= 16,384) Gwei
MAX_GASPRICE: 16384
# 2**3 (= 8) Gwei
MIN_GASPRICE: 8

# Time parameters
# 2**3 (= 8) | online epochs
ONLINE_PERIOD: 8
# 2**8 (= 256) | epochs
LIGHT_CLIENT_COMMITTEE_PERIOD: 256

# Max operations per block
# 2**20 (= 1,048,576) 
MAX_CUSTODY_CHUNK_CHALLENGE_RECORDS: 1048576

# Domain types
DOMAIN_SHARD_PROPOSAL: 0x80000000
DOMAIN_SHARD_COMMITTEE: 0x81000000
DOMAIN_LIGHT_CLIENT: 0x82000000
# custody-game spec
DOMAIN_CUSTODY_BIT_SLASHING: 0x83000000
DOMAIN_LIGHT_SELECTION_PROOF: 0x84000000
DOMAIN_LIGHT_AGGREGATE_AND_PROOF: 0x85000000

# custody-game
# ---------------------------------------------------------------
# Time parameters
# 2**1 (= 2) epochs, 12.8 minutes
RANDAO_PENALTY_EPOCHS: 2
# 2**15 (= 32,768) epochs, ~146 days
EARLY_DERIVED_SECRET_PENALTY_MAX_FUTURE_EPOCHS: 32768
# 2**14 (= 16,384) epochs ~73 days
EPOCHS_PER_CUSTODY_PERIOD: 16384
# 2**11 (= 2,048) epochs, ~9 days
CUSTODY_PERIOD_TO_RANDAO_PADDING: 2048
# 2**15 (= 32,768) epochs, ~146 days
MAX_CHUNK_CHALLENGE_DELAY: 32768

# Misc parameters
# 2**256 - 189
CUSTODY_PRIME: 115792089237316195423570985008687907853269984665640564039457584007913129639747
# 3
CUSTODY_SECRETS: 3
# 2**5 (= 32) bytes
BYTES_PER_CUSTODY_ATOM: 32
# 1/1024 chance of custody bit 1
CUSTODY_PROBABILITY_EXPONENT: 10

# Max operations
# 2**8 (= 256)
MAX_CUSTODY_KEY_REVEALS: 256
# 2**0 (= 1)
MAX_EARLY_DERIVED_SECRET_REVEALS: 1
# 2**2 (= 2)
MAX_CUSTODY_CHUNK_CHALLENGES: 4
# 2** 4 (= 16)
MAX_CUSTODY_CHUNK_CHALLENGE_RESP: 16
# 2**0 (= 1)
MAX_CUSTODY_SLASHINGS: 1

# Reward and penalty quotients
EARLY_DERIVED_SECRET_REVEAL_SLOT_REWARD_MULTIPLE: 2
# 2**8 (= 256)
MINOR_REWARD_QUOTIENT: 256