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assembly.go
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assembly.go
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package integration
import (
"crypto/ecdsa"
"errors"
"fmt"
"github.com/corex-mn/corex-base/abft"
"github.com/corex-mn/corex-base/hash"
"github.com/corex-mn/corex-base/inter/idx"
"github.com/corex-mn/corex-base/kvdb"
"github.com/corex-mn/corex-base/kvdb/flushable"
"github.com/ethereum/go-ethereum/accounts"
"github.com/ethereum/go-ethereum/accounts/keystore"
"github.com/ethereum/go-ethereum/cmd/utils"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/log"
"github.com/corex-mn/go-corex/gossip"
"github.com/corex-mn/go-corex/opera"
"github.com/corex-mn/go-corex/opera/genesisstore"
"github.com/corex-mn/go-corex/utils/adapters/vecmt2dagidx"
"github.com/corex-mn/go-corex/vecmt"
)
// GenesisMismatchError is raised when trying to overwrite an existing
// genesis block with an incompatible one.
type GenesisMismatchError struct {
Stored, New hash.Hash
}
// Error implements error interface.
func (e *GenesisMismatchError) Error() string {
return fmt.Sprintf("database contains incompatible gossip genesis (have %s, new %s)", e.Stored.String(), e.New.String())
}
type Configs struct {
Opera gossip.Config
OperaStore gossip.StoreConfig
Lachesis abft.Config
LachesisStore abft.StoreConfig
VectorClock vecmt.IndexConfig
AllowedGenesis map[uint64]hash.Hash
}
type InputGenesis struct {
Hash hash.Hash
Read func(*genesisstore.Store) error
Close func() error
}
func panics(name string) func(error) {
return func(err error) {
log.Crit(fmt.Sprintf("%s error", name), "err", err)
}
}
func mustOpenDB(producer kvdb.DBProducer, name string) kvdb.DropableStore {
db, err := producer.OpenDB(name)
if err != nil {
utils.Fatalf("Failed to open '%s' database: %v", name, err)
}
return db
}
func getStores(producer kvdb.FlushableDBProducer, cfg Configs) (*gossip.Store, *abft.Store, *genesisstore.Store) {
gdb := gossip.NewStore(producer, cfg.OperaStore)
cMainDb := mustOpenDB(producer, "lachesis")
cGetEpochDB := func(epoch idx.Epoch) kvdb.DropableStore {
return mustOpenDB(producer, fmt.Sprintf("lachesis-%d", epoch))
}
cdb := abft.NewStore(cMainDb, cGetEpochDB, panics("Lachesis store"), cfg.LachesisStore)
genesisStore := genesisstore.NewStore(mustOpenDB(producer, "genesis"))
return gdb, cdb, genesisStore
}
func rawApplyGenesis(gdb *gossip.Store, cdb *abft.Store, g opera.Genesis, cfg Configs) error {
_, _, _, err := rawMakeEngine(gdb, cdb, g, cfg, true)
return err
}
func rawMakeEngine(gdb *gossip.Store, cdb *abft.Store, g opera.Genesis, cfg Configs, applyGenesis bool) (*abft.Lachesis, *vecmt.Index, gossip.BlockProc, error) {
blockProc := gossip.DefaultBlockProc(g)
if applyGenesis {
_, err := gdb.ApplyGenesis(blockProc, g)
if err != nil {
return nil, nil, blockProc, fmt.Errorf("failed to write Gossip genesis state: %v", err)
}
err = cdb.ApplyGenesis(&abft.Genesis{
Epoch: gdb.GetEpoch(),
Validators: gdb.GetValidators(),
})
if err != nil {
return nil, nil, blockProc, fmt.Errorf("failed to write Lachesis genesis state: %v", err)
}
}
// create consensus
vecClock := vecmt.NewIndex(panics("Vector clock"), cfg.VectorClock)
engine := abft.NewLachesis(cdb, &GossipStoreAdapter{gdb}, vecmt2dagidx.Wrap(vecClock), panics("Lachesis"), cfg.Lachesis)
return engine, vecClock, blockProc, nil
}
func makeFlushableProducer(rawProducer kvdb.IterableDBProducer) (*flushable.SyncedPool, error) {
existingDBs := rawProducer.Names()
err := CheckDBList(existingDBs)
if err != nil {
return nil, fmt.Errorf("malformed chainstore: %v", err)
}
dbs := flushable.NewSyncedPool(rawProducer, FlushIDKey)
err = dbs.Initialize(existingDBs)
if err != nil {
return nil, fmt.Errorf("failed to open existing databases: %v", err)
}
return dbs, nil
}
func applyGenesis(rawProducer kvdb.DBProducer, inputGenesis InputGenesis, cfg Configs) error {
rawDbs := &DummyFlushableProducer{rawProducer}
gdb, cdb, genesisStore := getStores(rawDbs, cfg)
defer gdb.Close()
defer cdb.Close()
defer genesisStore.Close()
log.Info("Decoding genesis file")
err := inputGenesis.Read(genesisStore)
if err != nil {
return err
}
log.Info("Applying genesis state")
networkID := genesisStore.GetRules().NetworkID
if want, ok := cfg.AllowedGenesis[networkID]; ok && want != inputGenesis.Hash {
return fmt.Errorf("genesis hash is not allowed for the network %d: want %s, got %s", networkID, want.String(), inputGenesis.Hash.String())
}
err = rawApplyGenesis(gdb, cdb, genesisStore.GetGenesis(), cfg)
if err != nil {
return err
}
err = gdb.Commit()
if err != nil {
return err
}
return nil
}
func makeEngine(rawProducer kvdb.IterableDBProducer, inputGenesis InputGenesis, emptyStart bool, cfg Configs) (*abft.Lachesis, *vecmt.Index, *gossip.Store, *abft.Store, *genesisstore.Store, gossip.BlockProc, error) {
dbs, err := makeFlushableProducer(rawProducer)
if err != nil {
return nil, nil, nil, nil, nil, gossip.BlockProc{}, err
}
if emptyStart {
// close flushable DBs and open raw DBs for performance reasons
err := dbs.Close()
if err != nil {
return nil, nil, nil, nil, nil, gossip.BlockProc{}, fmt.Errorf("failed to close existing databases: %v", err)
}
err = applyGenesis(rawProducer, inputGenesis, cfg)
if err != nil {
return nil, nil, nil, nil, nil, gossip.BlockProc{}, fmt.Errorf("failed to apply genesis state: %v", err)
}
// re-open dbs
dbs, err = makeFlushableProducer(rawProducer)
if err != nil {
return nil, nil, nil, nil, nil, gossip.BlockProc{}, err
}
}
gdb, cdb, genesisStore := getStores(dbs, cfg)
defer func() {
if err != nil {
gdb.Close()
cdb.Close()
genesisStore.Close()
}
}()
// compare genesis with the input
if !emptyStart {
genesisHash := gdb.GetGenesisHash()
if genesisHash == nil {
err = errors.New("malformed chainstore: genesis hash is not written")
return nil, nil, nil, nil, nil, gossip.BlockProc{}, err
}
if *genesisHash != inputGenesis.Hash {
err = &GenesisMismatchError{*genesisHash, inputGenesis.Hash}
return nil, nil, nil, nil, nil, gossip.BlockProc{}, err
}
}
engine, vecClock, blockProc, err := rawMakeEngine(gdb, cdb, genesisStore.GetGenesis(), cfg, false)
if err != nil {
err = fmt.Errorf("failed to make engine: %v", err)
return nil, nil, nil, nil, nil, gossip.BlockProc{}, err
}
if *gdb.GetGenesisHash() != inputGenesis.Hash {
err = fmt.Errorf("genesis hash mismatch with genesis file header: %s != %s", gdb.GetGenesisHash().String(), inputGenesis.Hash.String())
return nil, nil, nil, nil, nil, gossip.BlockProc{}, err
}
err = gdb.Commit()
if err != nil {
err = fmt.Errorf("failed to commit DBs: %v", err)
return nil, nil, nil, nil, nil, gossip.BlockProc{}, err
}
return engine, vecClock, gdb, cdb, genesisStore, blockProc, nil
}
// MakeEngine makes consensus engine from config.
func MakeEngine(rawProducer kvdb.IterableDBProducer, genesis InputGenesis, cfg Configs) (*abft.Lachesis, *vecmt.Index, *gossip.Store, *abft.Store, *genesisstore.Store, gossip.BlockProc) {
dropAllDBsIfInterrupted(rawProducer)
existingDBs := rawProducer.Names()
engine, vecClock, gdb, cdb, genesisStore, blockProc, err := makeEngine(rawProducer, genesis, len(existingDBs) == 0, cfg)
if err != nil {
if len(existingDBs) == 0 {
dropAllDBs(rawProducer)
}
utils.Fatalf("Failed to make engine: %v", err)
}
if len(existingDBs) == 0 {
log.Info("Applied genesis state", "hash", genesis.Hash.String())
} else {
log.Info("Genesis is already written", "hash", genesis.Hash.String())
}
return engine, vecClock, gdb, cdb, genesisStore, blockProc
}
// SetAccountKey sets key into accounts manager and unlocks it with pswd.
func SetAccountKey(
am *accounts.Manager, key *ecdsa.PrivateKey, pswd string,
) (
acc accounts.Account,
) {
kss := am.Backends(keystore.KeyStoreType)
if len(kss) < 1 {
log.Crit("Keystore is not found")
return
}
ks := kss[0].(*keystore.KeyStore)
acc = accounts.Account{
Address: crypto.PubkeyToAddress(key.PublicKey),
}
imported, err := ks.ImportECDSA(key, pswd)
if err == nil {
acc = imported
} else if err.Error() != "account already exists" {
log.Crit("Failed to import key", "err", err)
}
err = ks.Unlock(acc, pswd)
if err != nil {
log.Crit("failed to unlock key", "err", err)
}
return
}