Created
September 24, 2019 04:11
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Script to compute state root for a specific block/state pair
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package main | |
import ( | |
"context" | |
"flag" | |
"log" | |
"github.com/prysmaticlabs/go-ssz" | |
"github.com/prysmaticlabs/prysm/beacon-chain/core/state" | |
"github.com/prysmaticlabs/prysm/beacon-chain/db" | |
"github.com/prysmaticlabs/prysm/beacon-chain/db/filters" | |
ethpb "github.com/prysmaticlabs/prysm/proto/eth/v1alpha1" | |
"github.com/prysmaticlabs/prysm/shared/bytesutil" | |
"github.com/prysmaticlabs/prysm/shared/params" | |
) | |
var dbPath = flag.String("db", "", "path to db") | |
func main() { | |
flag.Parse() | |
beaconDB, err := db.NewDB(*dbPath) | |
if err != nil { | |
log.Fatal(err) | |
} | |
ctx := context.Background() | |
block, err := beaconDB.HeadBlock(ctx) | |
if err != nil { | |
log.Fatal(err) | |
} | |
beaconState, err := beaconDB.HeadState(ctx) | |
if err != nil { | |
log.Fatal(err) | |
} | |
headRoot, err := ssz.SigningRoot(block) | |
if err != nil { | |
log.Fatal(err) | |
} | |
stateRoot, err := ssz.HashTreeRoot(beaconState) | |
if err != nil { | |
log.Fatal(err) | |
} | |
parentBlock, err := beaconDB.Block(ctx, bytesutil.ToBytes32(block.ParentRoot)) | |
if err != nil { | |
log.Fatal(err) | |
} | |
parentRoot, err := ssz.SigningRoot(parentBlock) | |
if err != nil { | |
log.Fatal(err) | |
} | |
atts, err := beaconDB.Attestations(ctx, filters.NewFilter().SetHeadBlockRoot(parentRoot[:])) | |
if err != nil { | |
log.Fatal(err) | |
} | |
blk := ðpb.BeaconBlock{ | |
Slot: block.Slot+1, | |
ParentRoot: headRoot[:], | |
StateRoot: stateRoot[:], | |
Body: ðpb.BeaconBlockBody{ | |
Eth1Data: ðpb.Eth1Data{ | |
DepositRoot: make([]byte, 32), | |
DepositCount: 0, | |
BlockHash: make([]byte, 32), | |
}, | |
Deposits: []*ethpb.Deposit{}, | |
Attestations: atts, | |
RandaoReveal: make([]byte, 96), | |
// TODO(2766): Implement rest of the retrievals for beacon block operations | |
Transfers: []*ethpb.Transfer{}, | |
ProposerSlashings: []*ethpb.ProposerSlashing{}, | |
AttesterSlashings: []*ethpb.AttesterSlashing{}, | |
VoluntaryExits: []*ethpb.VoluntaryExit{}, | |
Graffiti: []byte{}, | |
}, | |
Signature: make([]byte, 96), | |
} | |
params.UseDemoBeaconConfig() | |
computed, err := state.ExecuteStateTransitionNoVerify( | |
ctx, | |
beaconState, | |
blk, | |
) | |
if err != nil { | |
log.Fatal(err) | |
} | |
log.Println(computed) | |
} |
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