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migrate.go
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migrate.go
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package main
import (
"encoding/json"
"fmt"
"time"
"github.com/spf13/cobra"
tmjson "github.com/tendermint/tendermint/libs/json"
tmtypes "github.com/tendermint/tendermint/types"
"github.com/cosmos/cosmos-sdk/client"
"github.com/cosmos/cosmos-sdk/client/flags"
sdk "github.com/cosmos/cosmos-sdk/types"
"github.com/cosmos/cosmos-sdk/version"
genutiltypes "github.com/cosmos/cosmos-sdk/x/genutil/types"
"github.com/kynnoenterprise/core/types"
)
// FlagGenesisTime defines the genesis time in string format
const FlagGenesisTime = "genesis-time"
var migrationMap = genutiltypes.MigrationMap{
}
// GetMigrationCallback returns a MigrationCallback for a given version.
func GetMigrationCallback(version, chainID string) genutiltypes.MigrationCallback {
if !types.IsMainnet(chainID) {
version = fmt.Sprintf("%s%s", "t", version)
}
return migrationMap[version]
}
// MigrateGenesisCmd returns a command to execute genesis state migration.
func MigrateGenesisCmd() *cobra.Command {
cmd := &cobra.Command{
Use: "migrate [target-version] [genesis-file]",
Short: "Migrate genesis to a specified target version",
Long: "Migrate the source genesis into the target version and print to STDOUT.",
Example: fmt.Sprintf(
"%s migrate v2 /path/to/genesis.json --chain-id=kynno_9701-2 --genesis-time=2022-04-01T17:00:00Z",
version.AppName,
),
Args: cobra.ExactArgs(2),
RunE: func(cmd *cobra.Command, args []string) error {
clientCtx := client.GetClientContextFromCmd(cmd)
target := args[0]
importGenesis := args[1]
genDoc, err := tmtypes.GenesisDocFromFile(importGenesis)
if err != nil {
return fmt.Errorf("failed to retrieve genesis.json: %w", err)
}
var initialState genutiltypes.AppMap
if err := json.Unmarshal(genDoc.AppState, &initialState); err != nil {
return fmt.Errorf("failed to JSON unmarshal initial genesis state: %w", err)
}
chainID, _ := cmd.Flags().GetString(flags.FlagChainID)
if chainID != "" {
genDoc.ChainID = chainID
}
migrationFn := GetMigrationCallback(target, chainID)
if migrationFn == nil {
return fmt.Errorf("unknown migration function for version: %s", target)
}
newGenState := migrationFn(initialState, clientCtx)
appState, err := json.Marshal(newGenState)
if err != nil {
return fmt.Errorf("failed to JSON marshal migrated genesis state: %w", err)
}
genDoc.AppState = appState
genesisTime, _ := cmd.Flags().GetString(FlagGenesisTime)
if genesisTime != "" {
var t time.Time
if err := t.UnmarshalText([]byte(genesisTime)); err != nil {
return fmt.Errorf("failed to unmarshal genesis time: %w", err)
}
genDoc.GenesisTime = t
}
bz, err := tmjson.Marshal(genDoc)
if err != nil {
return fmt.Errorf("failed to marshal genesis doc: %w", err)
}
sortedBz, err := sdk.SortJSON(bz)
if err != nil {
return fmt.Errorf("failed to sort JSON genesis doc: %w", err)
}
cmd.Println(string(sortedBz))
return nil
},
}
cmd.Flags().String(FlagGenesisTime, "", "override genesis time")
cmd.Flags().String(flags.FlagChainID, "", "override genesis chain-id")
return cmd
}