prysm-pulse/beacon-chain/deterministic-genesis/service.go
terencechain 699bfdfdb4
Rename pow to execution (#11135)
* Rename pow to execution

* Fix complain

* Fix complain
2022-08-01 14:43:47 +00:00

177 lines
5.6 KiB
Go

// Package interopcoldstart allows for spinning up a deterministic-genesis
// local chain without the need for eth1 deposits useful for
// local client development and interoperability testing.
package interopcoldstart
import (
"context"
"math/big"
"os"
"time"
"github.com/prysmaticlabs/prysm/beacon-chain/cache/depositcache"
"github.com/prysmaticlabs/prysm/beacon-chain/db"
"github.com/prysmaticlabs/prysm/beacon-chain/execution"
"github.com/prysmaticlabs/prysm/beacon-chain/state"
v1 "github.com/prysmaticlabs/prysm/beacon-chain/state/v1"
types "github.com/prysmaticlabs/prysm/consensus-types/primitives"
ethpb "github.com/prysmaticlabs/prysm/proto/prysm/v1alpha1"
"github.com/prysmaticlabs/prysm/runtime"
"github.com/prysmaticlabs/prysm/runtime/interop"
"github.com/prysmaticlabs/prysm/time/slots"
)
var _ runtime.Service = (*Service)(nil)
var _ depositcache.DepositFetcher = (*Service)(nil)
var _ execution.ChainStartFetcher = (*Service)(nil)
// Service spins up an client interoperability service that handles responsibilities such
// as kickstarting a genesis state for the beacon node from cli flags or a genesis.ssz file.
type Service struct {
cfg *Config
ctx context.Context
cancel context.CancelFunc
chainStartDeposits []*ethpb.Deposit
}
// Config options for the interop service.
type Config struct {
GenesisTime uint64
NumValidators uint64
BeaconDB db.HeadAccessDatabase
DepositCache *depositcache.DepositCache
GenesisPath string
}
// NewService is an interoperability testing service to inject a deterministically generated genesis state
// into the beacon chain database and running services at start up. This service should not be used in production
// as it does not have any value other than ease of use for testing purposes.
func NewService(ctx context.Context, cfg *Config) *Service {
ctx, cancel := context.WithCancel(ctx)
return &Service{
cfg: cfg,
ctx: ctx,
cancel: cancel,
}
}
// Start initializes the genesis state from configured flags.
func (s *Service) Start() {
log.Warn("Saving generated genesis state in database for interop testing")
if s.cfg.GenesisPath != "" {
data, err := os.ReadFile(s.cfg.GenesisPath)
if err != nil {
log.Fatalf("Could not read pre-loaded state: %v", err)
}
genesisState := &ethpb.BeaconState{}
if err := genesisState.UnmarshalSSZ(data); err != nil {
log.Fatalf("Could not unmarshal pre-loaded state: %v", err)
}
genesisTrie, err := v1.InitializeFromProto(genesisState)
if err != nil {
log.Fatalf("Could not get state trie: %v", err)
}
if err := s.saveGenesisState(s.ctx, genesisTrie); err != nil {
log.Fatalf("Could not save interop genesis state %v", err)
}
return
}
// Save genesis state in db
genesisState, _, err := interop.GenerateGenesisState(s.ctx, s.cfg.GenesisTime, s.cfg.NumValidators)
if err != nil {
log.Fatalf("Could not generate interop genesis state: %v", err)
}
genesisTrie, err := v1.InitializeFromProto(genesisState)
if err != nil {
log.Fatalf("Could not get state trie: %v", err)
}
if s.cfg.GenesisTime == 0 {
// Generated genesis time; fetch it
s.cfg.GenesisTime = genesisTrie.GenesisTime()
}
gRoot, err := genesisTrie.HashTreeRoot(s.ctx)
if err != nil {
log.Fatalf("Could not hash tree root genesis state: %v", err)
}
go slots.CountdownToGenesis(s.ctx, time.Unix(int64(s.cfg.GenesisTime), 0), s.cfg.NumValidators, gRoot)
if err := s.saveGenesisState(s.ctx, genesisTrie); err != nil {
log.Fatalf("Could not save interop genesis state %v", err)
}
}
// Stop does nothing.
func (_ *Service) Stop() error {
return nil
}
// Status always returns nil.
func (_ *Service) Status() error {
return nil
}
// AllDeposits mocks out the deposit cache functionality for interop.
func (_ *Service) AllDeposits(_ context.Context, _ *big.Int) []*ethpb.Deposit {
return []*ethpb.Deposit{}
}
// ChainStartEth1Data mocks out the powchain functionality for interop.
func (_ *Service) ChainStartEth1Data() *ethpb.Eth1Data {
return &ethpb.Eth1Data{}
}
// PreGenesisState returns an empty beacon state.
func (_ *Service) PreGenesisState() state.BeaconState {
s, err := v1.InitializeFromProto(&ethpb.BeaconState{})
if err != nil {
panic("could not initialize state")
}
return s
}
// ClearPreGenesisData --
func (_ *Service) ClearPreGenesisData() {
// no-op
}
// DepositByPubkey mocks out the deposit cache functionality for interop.
func (_ *Service) DepositByPubkey(_ context.Context, _ []byte) (*ethpb.Deposit, *big.Int) {
return &ethpb.Deposit{}, nil
}
// DepositsNumberAndRootAtHeight mocks out the deposit cache functionality for interop.
func (_ *Service) DepositsNumberAndRootAtHeight(_ context.Context, _ *big.Int) (uint64, [32]byte) {
return 0, [32]byte{}
}
// FinalizedDeposits mocks out the deposit cache functionality for interop.
func (_ *Service) FinalizedDeposits(_ context.Context) *depositcache.FinalizedDeposits {
return nil
}
// NonFinalizedDeposits mocks out the deposit cache functionality for interop.
func (_ *Service) NonFinalizedDeposits(_ context.Context, _ int64, _ *big.Int) []*ethpb.Deposit {
return []*ethpb.Deposit{}
}
func (s *Service) saveGenesisState(ctx context.Context, genesisState state.BeaconState) error {
if err := s.cfg.BeaconDB.SaveGenesisData(ctx, genesisState); err != nil {
return err
}
s.chainStartDeposits = make([]*ethpb.Deposit, genesisState.NumValidators())
for i := types.ValidatorIndex(0); uint64(i) < uint64(genesisState.NumValidators()); i++ {
pk := genesisState.PubkeyAtIndex(i)
s.chainStartDeposits[i] = &ethpb.Deposit{
Data: &ethpb.Deposit_Data{
PublicKey: pk[:],
},
}
}
return nil
}