60 lines
1.4 KiB
Go
60 lines
1.4 KiB
Go
package seeds
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import (
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"encoding/json"
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"os"
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"github.com/pkg/errors"
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"github.com/spf13/cobra"
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"github.com/spf13/viper"
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"github.com/tendermint/basecoin/client/commands"
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"github.com/tendermint/light-client/certifiers"
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)
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var exportCmd = &cobra.Command{
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Use: "export <file>",
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Short: "Export selected seeds to given file",
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Long: `Exports the most recent seed to a binary file.
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If desired, you can select by an older height or validator hash.
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`,
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RunE: commands.RequireInit(exportSeed),
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SilenceUsage: true,
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}
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func init() {
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exportCmd.Flags().Int(heightFlag, 0, "Show the seed with closest height to this")
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exportCmd.Flags().String(hashFlag, "", "Show the seed matching the validator hash")
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RootCmd.AddCommand(exportCmd)
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}
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func exportSeed(cmd *cobra.Command, args []string) error {
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if len(args) != 1 || len(args[0]) == 0 {
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return errors.New("You must provide a filepath to output")
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}
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path := args[0]
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// load the seed as specified
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trust, _ := commands.GetProviders()
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h := viper.GetInt(heightFlag)
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hash := viper.GetString(hashFlag)
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seed, err := loadSeed(trust, h, hash, "")
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if err != nil {
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return err
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}
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// now get the output file and write it
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return writeSeed(seed, path)
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}
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func writeSeed(seed certifiers.Seed, path string) (err error) {
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f, err := os.Create(path)
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if err != nil {
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return errors.WithStack(err)
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}
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defer f.Close()
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stream := json.NewEncoder(f)
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err = stream.Encode(seed)
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return errors.WithStack(err)
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}
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