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Update everything to latest spec change from July 21

This commit is contained in:
mratsim 2018-07-23 12:15:56 +02:00
parent 65dbb086d1
commit 2438aaada8
1 changed files with 30 additions and 17 deletions
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beacon_chain/datatypes.nim
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@ -5,14 +5,17 @@
# * Apache v2 license (license terms in the root directory or at http://www.apache.org/licenses/LICENSE-2.0).
# at your option. This file may not be copied, modified, or distributed except according to those terms.
import intsets, stint, eth_common
import intsets, eth_common, math
# Implementation based on WIP spec https://notes.ethereum.org/SCIg8AH5SA-O4C1G1LYZHQ?view
# ⚠ Spec is updated very often, implementation might quickly be outdated
type
AttestationVote* = object
# Implementation pending https://ethresear.ch/t/implementations-of-proof-of-concept-beacon-chains/2509/5?u=mratsim
Keccak256_Digest* = distinct Hash256
Blake2_256_Digest* = distinct Hash256
Keccak256_Digest* = distinct Hash256 # TODO, previously Keccak256 fields used the "bytes" type
Blake2_256_Digest* = distinct Hash256 # while Blake2 used hash32, but latest spec changed everything to hash32
BeaconBlock* = object
parentHash*: Keccak256_Digest # Hash of the parent block
@ -43,20 +46,20 @@ type
# Also, IntSets uses machine int size while we require int64 even on 32-bit platform.
CrystallizedState* = object
activeValidators: seq[ValidatorRecord] # List of active validators
queuedValidators: seq[ValidatorRecord] # List of joined but not yet inducted validators
exitedValidators: seq[ValidatorRecord] # List of removed validators pending withdrawal
curEpochShuffling: seq[int32] #int24 # The permutation of validators used to determine who cross-links what shard in this epoch
currentEpoch: int64 # The current epoch
lastJustifiedEpoch: int64 # The last justified epoch
lastFinalizedEpoch: int64 # The last finalized epoch
dynasty: int64 # The current dynasty
next_shard: int16 # The next shard that cross-linking assignment will start from
currentCheckpoint: Keccak256_Digest # The current FFG checkpoint
crosslinkRecords: seq[CrosslinkRecord] # Records about the most recent crosslink `for each shard
totalDeposits: Int256 # Total balance of deposits
crosslinkSeed: Keccak256_Digest # Used to select the committees for each shard
crosslinkSeedLastReset: int64 # Last epoch the crosslink seed was reset
activeValidators: seq[ValidatorRecord] # List of active validators
queuedValidators: seq[ValidatorRecord] # List of joined but not yet inducted validators
exitedValidators: seq[ValidatorRecord] # List of removed validators pending withdrawal
currentEpoch: int64 # The current epoch
currentEpochShuffling: seq[int32] #int24 # The permutation of validators used to determine who cross-links what shard in this epoch
lastJustifiedEpoch: int64 # The last justified epoch
lastFinalizedEpoch: int64 # The last finalized epoch
current_dynasty: int64 # The current dynasty
next_shard: int16 # The next shard that cross-linking assignment will start from
currentCheckpoint: Keccak256_Digest # The current FFG checkpoint
crosslinkRecords: seq[CrosslinkRecord] # Records about the most recent crosslink `for each shard
totalDeposits: Int256 # Total balance of deposits
crosslinkSeed: Keccak256_Digest # Used to select the committees for each shard
crosslinkSeedLastReset: int64 # Last epoch the crosslink seed was reset
BLSPublicKey = object
# Stub for BLS signature
@ -73,3 +76,13 @@ type
CrosslinkRecord* = object
epoch: int64 # What epoch the crosslink was submitted in
hash: Keccak256_Digest # The block hash
const
ShardCount* = 1024 # a constant referring to the number of shards
EthSupplyCap* = 2^27 # ~= 134 million
DepositSize* = 32 # You need to deposit 32 ETH to be a validator in Casper
MaxValidatorCount* = EthSupplyCap div DepositSize # 4_194_304
EpochLength* = 64 # blocks
SlotDuration* = 8 # seconds
MinCommitteeSize* = 128 # (rationale: see recommended minimum 111 here https://vitalik.ca/files/Ithaca201807_Sharding.pdf)
EndEpochGracePeriod = 8 # blocks