111 lines
2.8 KiB
Go
111 lines
2.8 KiB
Go
package cli
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import (
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"bytes"
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"encoding/json"
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"fmt"
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"io"
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"os"
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"github.com/spf13/cobra"
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"github.com/cosmos/cosmos-sdk/client"
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"github.com/cosmos/cosmos-sdk/client/flags"
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"github.com/cosmos/cosmos-sdk/version"
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genutiltypes "github.com/cosmos/cosmos-sdk/x/genutil/types"
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)
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const (
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flagHeight = "height"
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flagJailAllowedAddrs = "jail-allowed-addrs"
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)
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// ExportCmd dumps app state to JSON.
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func ExportCmd(app ExportableApp) *cobra.Command {
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cmd := &cobra.Command{
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Use: "export",
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Short: "Export state to JSON",
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Args: cobra.NoArgs,
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RunE: func(cmd *cobra.Command, _ []string) error {
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config := client.GetConfigFromCmd(cmd)
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if _, err := os.Stat(config.GenesisFile()); os.IsNotExist(err) {
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return err
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}
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if app == nil {
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if _, err := fmt.Fprintln(cmd.ErrOrStderr(), "WARNING: App exporter not defined. Returning genesis file."); err != nil {
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return err
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}
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// Open file in read-only mode so we can copy it to stdout.
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// It is possible that the genesis file is large,
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// so we don't need to read it all into memory
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// before we stream it out.
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f, err := os.OpenFile(config.GenesisFile(), os.O_RDONLY, 0)
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if err != nil {
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return err
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}
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defer f.Close()
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if _, err := io.Copy(cmd.OutOrStdout(), f); err != nil {
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return err
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}
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return nil
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}
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height, _ := cmd.Flags().GetInt64(flagHeight)
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jailAllowedAddrs, _ := cmd.Flags().GetStringSlice(flagJailAllowedAddrs)
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outputDocument, _ := cmd.Flags().GetString(flags.FlagOutputDocument)
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if height != -1 {
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if err := app.LoadHeight(uint64(height)); err != nil {
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return err
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}
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}
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exported, err := app.ExportAppStateAndValidators(jailAllowedAddrs)
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if err != nil {
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return fmt.Errorf("error exporting state: %w", err)
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}
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appGenesis, err := genutiltypes.AppGenesisFromFile(config.GenesisFile())
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if err != nil {
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return err
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}
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// set current binary version
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appGenesis.AppName = version.AppName
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appGenesis.AppVersion = version.Version
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appGenesis.AppState = exported.AppState
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appGenesis.InitialHeight = exported.Height
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appGenesis.Consensus.Validators = exported.Validators
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out, err := json.Marshal(appGenesis)
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if err != nil {
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return err
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}
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if outputDocument == "" {
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// Copy the entire genesis file to stdout.
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_, err := io.Copy(cmd.OutOrStdout(), bytes.NewReader(out))
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return err
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}
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if err = appGenesis.SaveAs(outputDocument); err != nil {
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return err
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}
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return nil
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},
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}
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cmd.Flags().Int64(flagHeight, -1, "Export state from a particular height (-1 means latest height)")
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cmd.Flags().
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StringSlice(flagJailAllowedAddrs, []string{}, "Comma-separated list of operator addresses of jailed validators to unjail")
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cmd.Flags().
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String(flags.FlagOutputDocument, "", "Exported state is written to the given file instead of STDOUT")
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return cmd
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}
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