forked from tendermint/tendermint
/
testnet.go
93 lines (76 loc) · 2.09 KB
/
testnet.go
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package commands
import (
"fmt"
"path"
"time"
"github.com/spf13/cobra"
cmn "github.com/tendermint/go-common"
"github.com/tendermint/tendermint/types"
)
var testnetFilesCmd = &cobra.Command{
Use: "testnet",
Short: "Initialize files for a Tendermint testnet",
Run: testnetFiles,
}
//flags
var (
nValidators int
dataDir string
)
func init() {
testnetFilesCmd.Flags().IntVar(&nValidators, "n", 4,
"Number of validators to initialize the testnet with")
testnetFilesCmd.Flags().StringVar(&dataDir, "dir", "mytestnet",
"Directory to store initialization data for the testnet")
RootCmd.AddCommand(testnetFilesCmd)
}
func testnetFiles(cmd *cobra.Command, args []string) {
genVals := make([]types.GenesisValidator, nValidators)
// Initialize core dir and priv_validator.json's
for i := 0; i < nValidators; i++ {
mach := cmn.Fmt("mach%d", i)
err := initMachCoreDirectory(dataDir, mach)
if err != nil {
cmn.Exit(err.Error())
}
// Read priv_validator.json to populate vals
privValFile := path.Join(dataDir, mach, "priv_validator.json")
privVal := types.LoadPrivValidator(privValFile)
genVals[i] = types.GenesisValidator{
PubKey: privVal.PubKey,
Amount: 1,
Name: mach,
}
}
// Generate genesis doc from generated validators
genDoc := &types.GenesisDoc{
GenesisTime: time.Now(),
ChainID: "chain-" + cmn.RandStr(6),
Validators: genVals,
}
// Write genesis file.
for i := 0; i < nValidators; i++ {
mach := cmn.Fmt("mach%d", i)
genDoc.SaveAs(path.Join(dataDir, mach, "genesis.json"))
}
fmt.Println(cmn.Fmt("Successfully initialized %v node directories", nValidators))
}
// Initialize per-machine core directory
func initMachCoreDirectory(base, mach string) error {
dir := path.Join(base, mach)
err := cmn.EnsureDir(dir, 0777)
if err != nil {
return err
}
// Create priv_validator.json file if not present
ensurePrivValidator(path.Join(dir, "priv_validator.json"))
return nil
}
func ensurePrivValidator(file string) {
if cmn.FileExists(file) {
return
}
privValidator := types.GenPrivValidator()
privValidator.SetFile(file)
privValidator.Save()
}