vbuterin c764202a57 Slashing penalty calculation change (#1217)
If the exit queue is very long, then a validator may take many months to exit. With the code as currently written, however, self-slashing is a potentially lucrative route to get one's money out faster, because one can exit in 36 days.

This PR changes it so that slashing can only extend your withdrawal time, not contract it. Also, instead of the slashed balances used to calculate one's slashing penalty being those in `[withdrawal - 54 days ... withdrawal - 18 days]`, we now run the penalization algorithm once every 36 days that a validator is slashed but not withdrawn, so that it covers the 36-day period where the validator was actually slashed.  It also moves the minimum slashing penalty to the `slash_validator` function so that it is only applied once.

We also simplify the `slashed_balances` logic to be per-epoch.
2019-06-28 14:35:26 +01:00

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# Mainnet preset
# Note: the intention of this file (for now) is to illustrate what a mainnet configuration could look like.
# Some of these constants may still change before the launch of Phase 0.
# Misc
# ---------------------------------------------------------------
# 2**10 (= 1,024)
SHARD_COUNT: 1024
# 2**7 (= 128)
TARGET_COMMITTEE_SIZE: 128
# 2**12 (= 4,096)
MAX_INDICES_PER_ATTESTATION: 4096
# 2**2 (= 4)
MIN_PER_EPOCH_CHURN_LIMIT: 4
# 2**16 (= 65,536)
CHURN_LIMIT_QUOTIENT: 65536
# See issue 563
SHUFFLE_ROUND_COUNT: 90
# Deposit contract
# ---------------------------------------------------------------
# **TBD**
DEPOSIT_CONTRACT_ADDRESS: 0x1234567890123456789012345678901234567890
# Gwei values
# ---------------------------------------------------------------
# 2**0 * 10**9 (= 1,000,000,000) Gwei
MIN_DEPOSIT_AMOUNT: 1000000000
# 2**5 * 10**9 (= 32,000,000,000) Gwei
MAX_EFFECTIVE_BALANCE: 32000000000
# 2**4 * 10**9 (= 16,000,000,000) Gwei
EJECTION_BALANCE: 16000000000
# 2**0 * 10**9 (= 1,000,000,000) Gwei
EFFECTIVE_BALANCE_INCREMENT: 1000000000
# Initial values
# ---------------------------------------------------------------
GENESIS_FORK_VERSION: 0x00000000
# 0, GENESIS_EPOCH is derived from this constant
GENESIS_SLOT: 0
BLS_WITHDRAWAL_PREFIX: 0
# Time parameters
# ---------------------------------------------------------------
# 6 seconds 6 seconds
SECONDS_PER_SLOT: 6
# 2**2 (= 4) slots 24 seconds
MIN_ATTESTATION_INCLUSION_DELAY: 4
# 2**6 (= 64) slots 6.4 minutes
SLOTS_PER_EPOCH: 64
# 2**0 (= 1) epochs 6.4 minutes
MIN_SEED_LOOKAHEAD: 1
# 2**2 (= 4) epochs 25.6 minutes
ACTIVATION_EXIT_DELAY: 4
# 2**10 (= 1,024) slots ~1.7 hours
SLOTS_PER_ETH1_VOTING_PERIOD: 1024
# 2**13 (= 8,192) slots ~13 hours
SLOTS_PER_HISTORICAL_ROOT: 8192
# 2**8 (= 256) epochs ~27 hours
MIN_VALIDATOR_WITHDRAWABILITY_DELAY: 256
# 2**11 (= 2,048) epochs 9 days
PERSISTENT_COMMITTEE_PERIOD: 2048
# 2**6 (= 64) epochs ~7 hours
MAX_EPOCHS_PER_CROSSLINK: 64
# 2**2 (= 4) epochs 25.6 minutes
MIN_EPOCHS_TO_INACTIVITY_PENALTY: 4
# State vector lengths
# ---------------------------------------------------------------
# 2**16 (= 65,536) epochs ~0.8 years
EPOCHS_PER_HISTORICAL_VECTOR: 65536
# 2**13 (= 8,192) epochs ~36 days
EPOCHS_PER_SLASHINGS_VECTOR: 8192
# 2**24 (= 16,777,216) historical roots, ~26,131 years
HISTORICAL_ROOTS_LIMIT: 16777216
# 2**40 (= 1,099,511,627,776) validator spots
VALIDATOR_REGISTRY_LIMIT: 1099511627776
# Reward and penalty quotients
# ---------------------------------------------------------------
# 2**5 (= 32)
BASE_REWARD_FACTOR: 32
# 2**9 (= 512)
WHISTLEBLOWER_REWARD_QUOTIENT: 512
# 2**3 (= 8)
PROPOSER_REWARD_QUOTIENT: 8
# 2**25 (= 33,554,432)
INACTIVITY_PENALTY_QUOTIENT: 33554432
# 2**5 (= 32)
MIN_SLASHING_PENALTY_QUOTIENT: 32
# Max operations per block
# ---------------------------------------------------------------
# 2**4 (= 16)
MAX_PROPOSER_SLASHINGS: 16
# 2**0 (= 1)
MAX_ATTESTER_SLASHINGS: 1
# 2**7 (= 128)
MAX_ATTESTATIONS: 128
# 2**4 (= 16)
MAX_DEPOSITS: 16
# 2**4 (= 16)
MAX_VOLUNTARY_EXITS: 16
# Originally 2**4 (= 16), disabled for now.
MAX_TRANSFERS: 0
# Signature domains
# ---------------------------------------------------------------
DOMAIN_BEACON_PROPOSER: 0
DOMAIN_RANDAO: 1
DOMAIN_ATTESTATION: 2
DOMAIN_DEPOSIT: 3
DOMAIN_VOLUNTARY_EXIT: 4
DOMAIN_TRANSFER: 5