/
state-bellatrix.go
279 lines (250 loc) · 9.22 KB
/
state-bellatrix.go
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package transition
import (
"context"
"github.com/pkg/errors"
"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/altair"
b "github.com/prysmaticlabs/prysm/v3/beacon-chain/core/blocks"
"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/helpers"
"github.com/prysmaticlabs/prysm/v3/beacon-chain/state"
state_native "github.com/prysmaticlabs/prysm/v3/beacon-chain/state/state-native"
"github.com/prysmaticlabs/prysm/v3/beacon-chain/state/stateutil"
fieldparams "github.com/prysmaticlabs/prysm/v3/config/fieldparams"
"github.com/prysmaticlabs/prysm/v3/config/params"
"github.com/prysmaticlabs/prysm/v3/consensus-types/blocks"
enginev1 "github.com/prysmaticlabs/prysm/v3/proto/engine/v1"
ethpb "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
)
// GenesisBeaconStateBellatrix gets called when MinGenesisActiveValidatorCount count of
// full deposits were made to the deposit contract and the ChainStart log gets emitted.
//
// Spec pseudocode definition:
//
// def initialize_beacon_state_from_eth1(eth1_block_hash: Bytes32,
// eth1_timestamp: uint64,
// deposits: Sequence[Deposit]) -> BeaconState:
// fork = Fork(
// previous_version=GENESIS_FORK_VERSION,
// current_version=GENESIS_FORK_VERSION,
// epoch=GENESIS_EPOCH,
// )
// state = BeaconState(
// genesis_time=eth1_timestamp + GENESIS_DELAY,
// fork=fork,
// eth1_data=Eth1Data(block_hash=eth1_block_hash, deposit_count=uint64(len(deposits))),
// latest_block_header=BeaconBlockHeader(body_root=hash_tree_root(BeaconBlockBody())),
// randao_mixes=[eth1_block_hash] * EPOCHS_PER_HISTORICAL_VECTOR, # Seed RANDAO with Eth1 entropy
// )
//
// # Process deposits
// leaves = list(map(lambda deposit: deposit.data, deposits))
// for index, deposit in enumerate(deposits):
// deposit_data_list = List[DepositData, 2**DEPOSIT_CONTRACT_TREE_DEPTH](*leaves[:index + 1])
// state.eth1_data.deposit_root = hash_tree_root(deposit_data_list)
// process_deposit(state, deposit)
//
// # Process activations
// for index, validator in enumerate(state.validators):
// balance = state.balances[index]
// validator.effective_balance = min(balance - balance % EFFECTIVE_BALANCE_INCREMENT, MAX_EFFECTIVE_BALANCE)
// if validator.effective_balance == MAX_EFFECTIVE_BALANCE:
// validator.activation_eligibility_epoch = GENESIS_EPOCH
// validator.activation_epoch = GENESIS_EPOCH
//
// # Set genesis validators root for domain separation and chain versioning
// state.genesis_validators_root = hash_tree_root(state.validators)
//
// return state
//
// This method differs from the spec so as to process deposits beforehand instead of the end of the function.
func GenesisBeaconStateBellatrix(ctx context.Context, deposits []*ethpb.Deposit, genesisTime uint64, eth1Data *ethpb.Eth1Data, ep *enginev1.ExecutionPayload) (state.BeaconState, error) {
st, err := EmptyGenesisStateBellatrix()
if err != nil {
return nil, err
}
// Process initial deposits.
st, err = helpers.UpdateGenesisEth1Data(st, deposits, eth1Data)
if err != nil {
return nil, err
}
st, err = b.ProcessPreGenesisDeposits(ctx, st, deposits)
if err != nil {
return nil, errors.Wrap(err, "could not process validator deposits")
}
// After deposits have been processed, overwrite eth1data to what is passed in. This allows us to "pre-mine" validators
// without the deposit root and count mismatching the real deposit contract.
if err := st.SetEth1Data(eth1Data); err != nil {
return nil, err
}
if err := st.SetEth1DepositIndex(eth1Data.DepositCount); err != nil {
return nil, err
}
return OptimizedGenesisBeaconStateBellatrix(genesisTime, st, st.Eth1Data(), ep)
}
// OptimizedGenesisBeaconStateBellatrix is used to create a state that has already processed deposits. This is to efficiently
// create a mainnet state at chainstart.
func OptimizedGenesisBeaconStateBellatrix(genesisTime uint64, preState state.BeaconState, eth1Data *ethpb.Eth1Data, ep *enginev1.ExecutionPayload) (state.BeaconState, error) {
if eth1Data == nil {
return nil, errors.New("no eth1data provided for genesis state")
}
randaoMixes := make([][]byte, params.BeaconConfig().EpochsPerHistoricalVector)
for i := 0; i < len(randaoMixes); i++ {
h := make([]byte, 32)
copy(h, eth1Data.BlockHash)
randaoMixes[i] = h
}
zeroHash := params.BeaconConfig().ZeroHash[:]
activeIndexRoots := make([][]byte, params.BeaconConfig().EpochsPerHistoricalVector)
for i := 0; i < len(activeIndexRoots); i++ {
activeIndexRoots[i] = zeroHash
}
blockRoots := make([][]byte, params.BeaconConfig().SlotsPerHistoricalRoot)
for i := 0; i < len(blockRoots); i++ {
blockRoots[i] = zeroHash
}
stateRoots := make([][]byte, params.BeaconConfig().SlotsPerHistoricalRoot)
for i := 0; i < len(stateRoots); i++ {
stateRoots[i] = zeroHash
}
slashings := make([]uint64, params.BeaconConfig().EpochsPerSlashingsVector)
genesisValidatorsRoot, err := stateutil.ValidatorRegistryRoot(preState.Validators())
if err != nil {
return nil, errors.Wrapf(err, "could not hash tree root genesis validators %v", err)
}
scores, err := preState.InactivityScores()
if err != nil {
return nil, err
}
scoresMissing := len(preState.Validators()) - len(scores)
if scoresMissing > 0 {
for i := 0; i < scoresMissing; i++ {
scores = append(scores, 0)
}
}
wep, err := blocks.WrappedExecutionPayload(ep)
if err != nil {
return nil, err
}
eph, err := blocks.PayloadToHeader(wep)
if err != nil {
return nil, err
}
st := ðpb.BeaconStateBellatrix{
// Misc fields.
Slot: 0,
GenesisTime: genesisTime,
GenesisValidatorsRoot: genesisValidatorsRoot[:],
Fork: ðpb.Fork{
PreviousVersion: params.BeaconConfig().AltairForkVersion,
CurrentVersion: params.BeaconConfig().BellatrixForkVersion,
Epoch: 0,
},
// Validator registry fields.
Validators: preState.Validators(),
Balances: preState.Balances(),
// Randomness and committees.
RandaoMixes: randaoMixes,
// Finality.
PreviousJustifiedCheckpoint: ðpb.Checkpoint{
Epoch: 0,
Root: params.BeaconConfig().ZeroHash[:],
},
CurrentJustifiedCheckpoint: ðpb.Checkpoint{
Epoch: 0,
Root: params.BeaconConfig().ZeroHash[:],
},
JustificationBits: []byte{0},
FinalizedCheckpoint: ðpb.Checkpoint{
Epoch: 0,
Root: params.BeaconConfig().ZeroHash[:],
},
HistoricalRoots: [][]byte{},
BlockRoots: blockRoots,
StateRoots: stateRoots,
Slashings: slashings,
// Eth1 data.
Eth1Data: eth1Data,
Eth1DataVotes: []*ethpb.Eth1Data{},
Eth1DepositIndex: preState.Eth1DepositIndex(),
LatestExecutionPayloadHeader: eph,
InactivityScores: scores,
}
bodyRoot, err := (ðpb.BeaconBlockBodyBellatrix{
RandaoReveal: make([]byte, 96),
Eth1Data: ðpb.Eth1Data{
DepositRoot: make([]byte, 32),
BlockHash: make([]byte, 32),
},
Graffiti: make([]byte, 32),
SyncAggregate: ðpb.SyncAggregate{
SyncCommitteeBits: make([]byte, fieldparams.SyncCommitteeLength/8),
SyncCommitteeSignature: make([]byte, fieldparams.BLSSignatureLength),
},
ExecutionPayload: &enginev1.ExecutionPayload{
ParentHash: make([]byte, 32),
FeeRecipient: make([]byte, 20),
StateRoot: make([]byte, 32),
ReceiptsRoot: make([]byte, 32),
LogsBloom: make([]byte, 256),
PrevRandao: make([]byte, 32),
BaseFeePerGas: make([]byte, 32),
BlockHash: make([]byte, 32),
Transactions: make([][]byte, 0),
},
}).HashTreeRoot()
if err != nil {
return nil, errors.Wrap(err, "could not hash tree root empty block body")
}
st.LatestBlockHeader = ðpb.BeaconBlockHeader{
ParentRoot: zeroHash,
StateRoot: zeroHash,
BodyRoot: bodyRoot[:],
}
ist, err := state_native.InitializeFromProtoBellatrix(st)
if err != nil {
return nil, err
}
sc, err := altair.NextSyncCommittee(context.Background(), ist)
if err != nil {
return nil, err
}
if err := ist.SetNextSyncCommittee(sc); err != nil {
return nil, err
}
if err := ist.SetCurrentSyncCommittee(sc); err != nil {
return nil, err
}
return ist, nil
}
// EmptyGenesisStateBellatrix returns an empty beacon state object.
func EmptyGenesisStateBellatrix() (state.BeaconState, error) {
st := ðpb.BeaconStateBellatrix{
// Misc fields.
Slot: 0,
Fork: ðpb.Fork{
PreviousVersion: params.BeaconConfig().AltairForkVersion,
CurrentVersion: params.BeaconConfig().BellatrixForkVersion,
Epoch: 0,
},
// Validator registry fields.
Validators: []*ethpb.Validator{},
Balances: []uint64{},
JustificationBits: []byte{0},
HistoricalRoots: [][]byte{},
// Eth1 data.
Eth1Data: ðpb.Eth1Data{},
Eth1DataVotes: []*ethpb.Eth1Data{},
Eth1DepositIndex: 0,
LatestExecutionPayloadHeader: &enginev1.ExecutionPayloadHeader{
ParentHash: make([]byte, 32),
FeeRecipient: make([]byte, 20),
StateRoot: make([]byte, 32),
ReceiptsRoot: make([]byte, 32),
LogsBloom: make([]byte, 256),
PrevRandao: make([]byte, 32),
BaseFeePerGas: make([]byte, 32),
BlockHash: make([]byte, 32),
TransactionsRoot: make([]byte, 32),
},
}
return state_native.InitializeFromProtoBellatrix(st)
}