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export.go
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export.go
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package server
// DONTCOVER
import (
"fmt"
"io/ioutil"
"os"
"github.com/spf13/cobra"
tmjson "github.com/tendermint/tendermint/libs/json"
tmproto "github.com/tendermint/tendermint/proto/tendermint/types"
tmtypes "github.com/tendermint/tendermint/types"
"github.com/cosmos/cosmos-sdk/client/flags"
"github.com/cosmos/cosmos-sdk/server/types"
sdk "github.com/cosmos/cosmos-sdk/types"
)
const (
FlagHeight = "height"
FlagForZeroHeight = "for-zero-height"
FlagJailAllowedAddrs = "jail-allowed-addrs"
)
// ExportCmd dumps app state to JSON.
func ExportCmd(appExporter types.AppExporter, defaultNodeHome string) *cobra.Command {
cmd := &cobra.Command{
Use: "export",
Short: "Export state to JSON",
RunE: func(cmd *cobra.Command, args []string) error {
serverCtx := GetServerContextFromCmd(cmd)
config := serverCtx.Config
homeDir, _ := cmd.Flags().GetString(flags.FlagHome)
config.SetRoot(homeDir)
if _, err := os.Stat(config.GenesisFile()); os.IsNotExist(err) {
return err
}
db, err := openDB(config.RootDir)
if err != nil {
return err
}
if appExporter == nil {
if _, err := fmt.Fprintln(os.Stderr, "WARNING: App exporter not defined. Returning genesis file."); err != nil {
return err
}
genesis, err := ioutil.ReadFile(config.GenesisFile())
if err != nil {
return err
}
fmt.Println(string(genesis))
return nil
}
traceWriterFile, _ := cmd.Flags().GetString(flagTraceStore)
traceWriter, err := openTraceWriter(traceWriterFile)
if err != nil {
return err
}
height, _ := cmd.Flags().GetInt64(FlagHeight)
forZeroHeight, _ := cmd.Flags().GetBool(FlagForZeroHeight)
jailAllowedAddrs, _ := cmd.Flags().GetStringSlice(FlagJailAllowedAddrs)
exported, err := appExporter(serverCtx.Logger, db, traceWriter, height, forZeroHeight, jailAllowedAddrs, serverCtx.Viper)
if err != nil {
return fmt.Errorf("error exporting state: %v", err)
}
doc, err := tmtypes.GenesisDocFromFile(serverCtx.Config.GenesisFile())
if err != nil {
return err
}
doc.AppState = exported.AppState
doc.Validators = exported.Validators
doc.InitialHeight = exported.Height
doc.ConsensusParams = &tmproto.ConsensusParams{
Block: tmproto.BlockParams{
MaxBytes: exported.ConsensusParams.Block.MaxBytes,
MaxGas: exported.ConsensusParams.Block.MaxGas,
TimeIotaMs: doc.ConsensusParams.Block.TimeIotaMs,
},
Evidence: tmproto.EvidenceParams{
MaxAgeNumBlocks: exported.ConsensusParams.Evidence.MaxAgeNumBlocks,
MaxAgeDuration: exported.ConsensusParams.Evidence.MaxAgeDuration,
MaxBytes: exported.ConsensusParams.Evidence.MaxBytes,
},
Validator: tmproto.ValidatorParams{
PubKeyTypes: exported.ConsensusParams.Validator.PubKeyTypes,
},
}
// NOTE: Tendermint uses a custom JSON decoder for GenesisDoc
// (except for stuff inside AppState). Inside AppState, we're free
// to encode as protobuf or amino.
encoded, err := tmjson.Marshal(doc)
if err != nil {
return err
}
cmd.Println(string(sdk.MustSortJSON(encoded)))
return nil
},
}
cmd.Flags().String(flags.FlagHome, defaultNodeHome, "The application home directory")
cmd.Flags().Int64(FlagHeight, -1, "Export state from a particular height (-1 means latest height)")
cmd.Flags().Bool(FlagForZeroHeight, false, "Export state to start at height zero (perform preproccessing)")
cmd.Flags().StringSlice(FlagJailAllowedAddrs, []string{}, "Comma-separated list of operator addresses of jailed validators to unjail")
return cmd
}