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Update beacon-chain.md

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Justin 2018-10-06 13:02:08 +01:00 committed by GitHub
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specs/beacon-chain.md
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@ -35,6 +35,7 @@ The primary source of load on the beacon chain are "attestations". Attestations
| --- | --- | :---: | - |
| `SHARD_COUNT` | 2**10 (= 1,024)| shards |
| `DEPOSIT_SIZE` | 2**5 (= 32) | ETH |
| `GWEI_PER_ETH` | 10**9 | Gwei/ETH |
| `MIN_COMMITTEE_SIZE` | 2**7 (= 128) | validators |
| `GENESIS_TIME` | **TBD** | seconds |
| `SLOT_DURATION` | 2**4 (= 16) | seconds |
@ -448,7 +449,7 @@ def add_validator(validators, pubkey, proof_of_possession, withdrawal_shard,
withdrawal_shard=withdrawal_shard,
withdrawal_address=withdrawal_address,
randao_commitment=randao_commitment,
balance=DEPOSIT_SIZE * 10**9, # in Gwei
balance=DEPOSIT_SIZE * GWEI_PER_ETH, # in Gwei
status=PENDING_LOG_IN,
exit_slot=0
)
@ -522,7 +523,7 @@ For all (`shard`, `shard_block_hash`) tuples, compute the total deposit size of
Let `time_since_finality = block.slot - last_finalized_slot`, and let `B` be the balance of any given validator whose balance we are adjusting, not including any balance changes from this round of state recalculation. Let:
* `total_deposits = sum([v.balance for i, v in enumerate(validators) if i in get_active_validator_indices(validators, dynasty)])` and `total_deposits_in_ETH = total_deposits // 10**9`
* `total_deposits = sum([v.balance for i, v in enumerate(validators) if i in get_active_validator_indices(validators, dynasty)])` and `total_deposits_in_ETH = total_deposits // GWEI_PER_ETH`
* `reward_quotient = BASE_REWARD_QUOTIENT * int_sqrt(total_deposits_in_ETH)` (`1/reward_quotient` is the per-slot max interest rate)
* `quadratic_penalty_quotient = SQRT_E_DROP_TIME**2` (after `D` slots about `D*D/2/quadratic_penalty_quotient` is the portion lost by offline validators)
@ -587,7 +588,7 @@ def change_validators(validators):
total_deposits = sum([v.balance for i, v in enumerate(validators) if i in active_validators])
# The maximum total Gwei that can be deposited and withdrawn
max_allowable_change = max(
2 * DEPOSIT_SIZE * 10**9,
2 * DEPOSIT_SIZE * GWEI_PER_ETH,
total_deposits // MAX_VALIDATOR_CHURN_QUOTIENT
)
# Go through the list start to end depositing+withdrawing as many as possible