/
replay.go
165 lines (146 loc) · 5.57 KB
/
replay.go
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package main
import (
"fmt"
"log"
"path/filepath"
"github.com/cosmos/cosmos-sdk/server"
sdk "github.com/cosmos/cosmos-sdk/types"
"github.com/spf13/cobra"
"github.com/spf13/viper"
abci "github.com/tendermint/tendermint/abci/types"
"github.com/tendermint/tendermint/mock"
"github.com/tendermint/tendermint/node"
"github.com/tendermint/tendermint/proxy"
sm "github.com/tendermint/tendermint/state"
"github.com/tendermint/tendermint/store"
"github.com/tendermint/tendermint/types"
dbm "github.com/tendermint/tm-db"
)
const (
dataDirFlag = "data_dir"
applicationDB = "application"
blockStoreDB = "blockstore"
stateDB = "state"
)
func replayCmd(ctx *server.Context) *cobra.Command {
cmd := &cobra.Command{
Use: "replay",
Short: "Replay blocks from local db",
Run: func(cmd *cobra.Command, args []string) {
log.Println("--------- replay start ---------")
dataDir := viper.GetString(dataDirFlag)
replayBlock(ctx, dataDir)
log.Println("--------- replay success ---------")
},
}
cmd.Flags().StringP(dataDirFlag, "d", ".fastock-chain-daemon/data", "Directory of block data for replaying")
return cmd
}
// replayBlock replays blocks from db, if something goes wrong, it will panic with error message.
func replayBlock(ctx *server.Context, originDataDir string) {
proxyApp, err := createProxyApp(ctx)
panicError(err)
res, err := proxyApp.Query().InfoSync(proxy.RequestInfo)
panicError(err)
currentBlockHeight := res.LastBlockHeight
currentAppHash := res.LastBlockAppHash
log.Println("current block height", "height", currentBlockHeight)
log.Println("current app hash", "appHash", fmt.Sprintf("%X", currentAppHash))
rootDir := ctx.Config.RootDir
dataDir := filepath.Join(rootDir, "data")
stateStoreDB, err := openDB(stateDB, dataDir)
panicError(err)
genesisDocProvider := node.DefaultGenesisDocProviderFunc(ctx.Config)
state, genDoc, err := node.LoadStateFromDBOrGenesisDocProvider(stateStoreDB, genesisDocProvider)
panicError(err)
// If startBlockHeight == 0 it means that we are at genesis and hence should initChain.
if currentBlockHeight == types.GetStartBlockHeight() {
err := initChain(state, stateStoreDB, genDoc, proxyApp)
panicError(err)
state = sm.LoadState(stateStoreDB)
}
// replay
startBlockHeight := currentBlockHeight + 1
doReplay(ctx, state, stateStoreDB, proxyApp, originDataDir, startBlockHeight)
}
// panic if error is not nil
func panicError(err error) {
if err != nil {
panic(err)
}
}
func openDB(dbName string, dataDir string) (db dbm.DB, err error) {
return sdk.NewLevelDB(dbName, dataDir)
}
func createProxyApp(ctx *server.Context) (proxy.AppConns, error) {
rootDir := ctx.Config.RootDir
dataDir := filepath.Join(rootDir, "data")
db, err := openDB(applicationDB, dataDir)
panicError(err)
app := newApp(ctx.Logger, db, nil)
clientCreator := proxy.NewLocalClientCreator(app)
// Create the proxyApp and establish connections to the ABCI app (consensus, mempool, query).
return createAndStartProxyAppConns(clientCreator)
}
func createAndStartProxyAppConns(clientCreator proxy.ClientCreator) (proxy.AppConns, error) {
proxyApp := proxy.NewAppConns(clientCreator)
if err := proxyApp.Start(); err != nil {
return nil, fmt.Errorf("error starting proxy app connections: %v", err)
}
return proxyApp, nil
}
func initChain(state sm.State, stateDB dbm.DB, genDoc *types.GenesisDoc, proxyApp proxy.AppConns) error {
validators := make([]*types.Validator, len(genDoc.Validators))
for i, val := range genDoc.Validators {
validators[i] = types.NewValidator(val.PubKey, val.Power)
}
validatorSet := types.NewValidatorSet(validators)
nextVals := types.TM2PB.ValidatorUpdates(validatorSet)
csParams := types.TM2PB.ConsensusParams(genDoc.ConsensusParams)
req := abci.RequestInitChain{
Time: genDoc.GenesisTime,
ChainId: genDoc.ChainID,
ConsensusParams: csParams,
Validators: nextVals,
AppStateBytes: genDoc.AppState,
}
res, err := proxyApp.Consensus().InitChainSync(req)
if err != nil {
return err
}
if state.LastBlockHeight == types.GetStartBlockHeight() { //we only update state when we are in initial state
// If the app returned validators or consensus params, update the state.
if len(res.Validators) > 0 {
vals, err := types.PB2TM.ValidatorUpdates(res.Validators)
if err != nil {
return err
}
state.Validators = types.NewValidatorSet(vals)
state.NextValidators = types.NewValidatorSet(vals)
} else if len(genDoc.Validators) == 0 {
// If validator set is not set in genesis and still empty after InitChain, exit.
return fmt.Errorf("validator set is nil in genesis and still empty after InitChain")
}
if res.ConsensusParams != nil {
state.ConsensusParams = state.ConsensusParams.Update(res.ConsensusParams)
}
sm.SaveState(stateDB, state)
}
return nil
}
func doReplay(ctx *server.Context, state sm.State, stateStoreDB dbm.DB,
proxyApp proxy.AppConns, originDataDir string, startBlockHeight int64) {
originBlockStoreDB, err := openDB(blockStoreDB, originDataDir)
panicError(err)
originBlockStore := store.NewBlockStore(originBlockStoreDB)
originLatestBlockHeight := originBlockStore.Height()
log.Println("origin latest block height", "height", originLatestBlockHeight)
for height := startBlockHeight; height <= originLatestBlockHeight; height++ {
log.Println("replaying ", height)
block := originBlockStore.LoadBlock(height)
meta := originBlockStore.LoadBlockMeta(height)
blockExec := sm.NewBlockExecutor(stateStoreDB, ctx.Logger, proxyApp.Consensus(), mock.Mempool{}, sm.MockEvidencePool{})
state, _, err = blockExec.ApplyBlock(state, meta.BlockID, block)
panicError(err)
}
}