# Mainnet config

# Extends the mainnet preset
PRESET_BASE: 'mainnet'

# Free-form short name of the network that this configuration applies to - known
# canonical network names include:
# * 'mainnet' - there can be only one
# * 'sepolia' - testnet
# * 'holesky' - testnet
# * 'hoodi' - testnet
# Must match the regex: [a-z0-9\-]
CONFIG_NAME: 'mainnet'

# Transition
# ---------------------------------------------------------------
# Estimated on Sept 15, 2022
TERMINAL_TOTAL_DIFFICULTY: 58750000000000000000000
# By default, don't use these params
TERMINAL_BLOCK_HASH: 0x0000000000000000000000000000000000000000000000000000000000000000
TERMINAL_BLOCK_HASH_ACTIVATION_EPOCH: 18446744073709551615


# Genesis
# ---------------------------------------------------------------
# `2**14` (= 16,384)
MIN_GENESIS_ACTIVE_VALIDATOR_COUNT: 16384
# Dec 1, 2020, 12pm UTC
MIN_GENESIS_TIME: 1606824000
# Mainnet initial fork version, recommend altering for testnets
GENESIS_FORK_VERSION: 0x00000000
# 604800 seconds (7 days)
GENESIS_DELAY: 604800


# Forking
# ---------------------------------------------------------------
# Some forks are disabled for now:
#  - These may be re-assigned to another fork-version later
#  - Temporarily set to max uint64 value: 2**64 - 1

# Altair
ALTAIR_FORK_VERSION: 0x01000000
ALTAIR_FORK_EPOCH: 74240  # Oct 27, 2021, 10:56:23am UTC
# Bellatrix
BELLATRIX_FORK_VERSION: 0x02000000
BELLATRIX_FORK_EPOCH: 144896  # Sept 6, 2022, 11:34:47am UTC
# Capella
CAPELLA_FORK_VERSION: 0x03000000
CAPELLA_FORK_EPOCH: 194048  # April 12, 2023, 10:27:35pm UTC
# Deneb
DENEB_FORK_VERSION: 0x04000000
DENEB_FORK_EPOCH: 269568  # March 13, 2024, 01:55:35pm UTC
# Electra
ELECTRA_FORK_VERSION: 0x05000000
ELECTRA_FORK_EPOCH: 364032  # May 7, 2025, 10:05:11am UTC
# Fulu
FULU_FORK_VERSION: 0x06000000
FULU_FORK_EPOCH: 411392  # December 3, 2025, 09:49:11pm UTC


# Time parameters
# ---------------------------------------------------------------
# 12 seconds (*deprecated*)
SECONDS_PER_SLOT: 12
# 12000 milliseconds
SLOT_DURATION_MS: 12000
# 14 (estimate from Eth1 mainnet)
SECONDS_PER_ETH1_BLOCK: 14
# 2**8 (= 256) epochs
MIN_VALIDATOR_WITHDRAWABILITY_DELAY: 256
# 2**8 (= 256) epochs
SHARD_COMMITTEE_PERIOD: 256
# 2**11 (= 2,048) Eth1 blocks
ETH1_FOLLOW_DISTANCE: 2048
# 1667 basis points, ~17% of SLOT_DURATION_MS
PROPOSER_REORG_CUTOFF_BPS: 1667
# 3333 basis points, ~33% of SLOT_DURATION_MS
ATTESTATION_DUE_BPS: 3333
# 6667 basis points, ~67% of SLOT_DURATION_MS
AGGREGATE_DUE_BPS: 6667

# Altair
# 3333 basis points, ~33% of SLOT_DURATION_MS
SYNC_MESSAGE_DUE_BPS: 3333
# 6667 basis points, ~67% of SLOT_DURATION_MS
CONTRIBUTION_DUE_BPS: 6667


# Validator cycle
# ---------------------------------------------------------------
# 2**2 (= 4)
INACTIVITY_SCORE_BIAS: 4
# 2**4 (= 16)
INACTIVITY_SCORE_RECOVERY_RATE: 16
# 2**4 * 10**9 (= 16,000,000,000) Gwei
EJECTION_BALANCE: 16000000000
# 2**2 (= 4) validators
MIN_PER_EPOCH_CHURN_LIMIT: 4
# 2**16 (= 65,536)
CHURN_LIMIT_QUOTIENT: 65536

# Deneb
# 2**3 (= 8) (*deprecated*)
MAX_PER_EPOCH_ACTIVATION_CHURN_LIMIT: 8

# Electra
# 2**7 * 10**9 (= 128,000,000,000) Gwei
MIN_PER_EPOCH_CHURN_LIMIT_ELECTRA: 128000000000
# 2**8 * 10**9 (= 256,000,000,000) Gwei
MAX_PER_EPOCH_ACTIVATION_EXIT_CHURN_LIMIT: 256000000000

# Fork choice
# ---------------------------------------------------------------
# 40%
PROPOSER_SCORE_BOOST: 40
# 20%
REORG_HEAD_WEIGHT_THRESHOLD: 20
# 160%
REORG_PARENT_WEIGHT_THRESHOLD: 160
# 2 epochs
REORG_MAX_EPOCHS_SINCE_FINALIZATION: 2


# Deposit contract
# ---------------------------------------------------------------
# Ethereum PoW Mainnet
DEPOSIT_CHAIN_ID: 1
DEPOSIT_NETWORK_ID: 1
DEPOSIT_CONTRACT_ADDRESS: 0x00000000219ab540356cBB839Cbe05303d7705Fa


# Networking
# ---------------------------------------------------------------
# 10 * 2**20 (= 10,485,760) bytes, 10 MiB
MAX_PAYLOAD_SIZE: 10485760
# 2**10 (= 1,024) blocks
MAX_REQUEST_BLOCKS: 1024
# 2**8 (= 256) epochs
EPOCHS_PER_SUBNET_SUBSCRIPTION: 256
# MIN_VALIDATOR_WITHDRAWABILITY_DELAY + CHURN_LIMIT_QUOTIENT // 2 (= 33,024) epochs
MIN_EPOCHS_FOR_BLOCK_REQUESTS: 33024
# 2**5 (= 32) slots
ATTESTATION_PROPAGATION_SLOT_RANGE: 32
# 500ms
MAXIMUM_GOSSIP_CLOCK_DISPARITY: 500
MESSAGE_DOMAIN_INVALID_SNAPPY: 0x00000000
MESSAGE_DOMAIN_VALID_SNAPPY: 0x01000000
# 2 subnets per node
SUBNETS_PER_NODE: 2
# 2**6 (= 64) subnets
ATTESTATION_SUBNET_COUNT: 64
# 0 bits
ATTESTATION_SUBNET_EXTRA_BITS: 0
# ceillog2(ATTESTATION_SUBNET_COUNT) + ATTESTATION_SUBNET_EXTRA_BITS (= 6 + 0) bits
ATTESTATION_SUBNET_PREFIX_BITS: 6

# Deneb
# 2**7 (= 128) blocks
MAX_REQUEST_BLOCKS_DENEB: 128
# 2**12 (= 4,096) epochs
MIN_EPOCHS_FOR_BLOB_SIDECARS_REQUESTS: 4096
# 6 subnets
BLOB_SIDECAR_SUBNET_COUNT: 6
# 6 blobs
MAX_BLOBS_PER_BLOCK: 6
# MAX_REQUEST_BLOCKS_DENEB * MAX_BLOBS_PER_BLOCK (= 128 * 6) sidecars
MAX_REQUEST_BLOB_SIDECARS: 768

# Electra
# 9 subnets
BLOB_SIDECAR_SUBNET_COUNT_ELECTRA: 9
# 9 blobs
MAX_BLOBS_PER_BLOCK_ELECTRA: 9
# MAX_REQUEST_BLOCKS_DENEB * MAX_BLOBS_PER_BLOCK_ELECTRA (= 128 * 9) sidecars
MAX_REQUEST_BLOB_SIDECARS_ELECTRA: 1152

# Fulu
# 2**7 (= 128) groups
NUMBER_OF_CUSTODY_GROUPS: 128
# 2**7 (= 128) subnets
DATA_COLUMN_SIDECAR_SUBNET_COUNT: 128
# MAX_REQUEST_BLOCKS_DENEB * NUMBER_OF_COLUMNS (= 128 * 128) sidecars
MAX_REQUEST_DATA_COLUMN_SIDECARS: 16384
# 2**3 (= 8) samples
SAMPLES_PER_SLOT: 8
# 2**2 (= 4) sidecars
CUSTODY_REQUIREMENT: 4
# 2**3 (= 8) sidecars
VALIDATOR_CUSTODY_REQUIREMENT: 8
# 2**5 * 10**9 (= 32,000,000,000) Gwei
BALANCE_PER_ADDITIONAL_CUSTODY_GROUP: 32000000000
# 2**12 (= 4,096) epochs
MIN_EPOCHS_FOR_DATA_COLUMN_SIDECARS_REQUESTS: 4096


# Blob Scheduling
# ---------------------------------------------------------------

BLOB_SCHEDULE:
  - EPOCH: 412672  # December 9, 2025, 02:21:11pm UTC
    MAX_BLOBS_PER_BLOCK: 15
  - EPOCH: 419072  # January 7, 2026, 01:01:11am UTC
    MAX_BLOBS_PER_BLOCK: 21