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common.go
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common.go
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package command
import (
"errors"
"io/ioutil"
"strings"
"github.com/KalyCoinProject/kalychain/crypto"
"github.com/KalyCoinProject/kalychain/helper/common"
"github.com/KalyCoinProject/kalychain/secrets"
"github.com/KalyCoinProject/kalychain/secrets/local"
"github.com/KalyCoinProject/kalychain/types"
"github.com/KalyCoinProject/kalychain/validators"
"github.com/hashicorp/go-hclog"
)
const (
ConsensusFlag = "consensus"
NoDiscoverFlag = "no-discover"
BootnodeFlag = "bootnode"
LogLevelFlag = "log-level"
IBFTValidatorTypeFlag = "ibft-validator-type"
IBFTValidatorFlag = "ibft-validator"
IBFTValidatorPrefixFlag = "ibft-validators-prefix-path"
)
var (
errInvalidValidatorRange = errors.New("minimum number of validators can not be greater than the " +
"maximum number of validators")
errInvalidMinNumValidators = errors.New("minimum number of validators must be greater than 0")
errInvalidMaxNumValidators = errors.New("maximum number of validators must be lower or equal " +
"than MaxSafeJSInt (2^53 - 2)")
ErrValidatorNumberExceedsMax = errors.New("validator number exceeds max validator number")
ErrECDSAKeyNotFound = errors.New("ECDSA key not found in given path")
ErrBLSKeyNotFound = errors.New("BLS key not found in given path")
)
func ValidateMinMaxValidatorsNumber(minValidatorCount uint64, maxValidatorCount uint64) error {
if minValidatorCount < 1 {
return errInvalidMinNumValidators
}
if minValidatorCount > maxValidatorCount {
return errInvalidValidatorRange
}
if maxValidatorCount > common.MaxSafeJSInt {
return errInvalidMaxNumValidators
}
return nil
}
// GetValidatorsFromPrefixPath extracts the addresses of the validators based on the directory
// prefix. It scans the directories for validator private keys and compiles a list of addresses
func GetValidatorsFromPrefixPath(
prefix string,
validatorType validators.ValidatorType,
) (validators.Validators, error) {
files, err := ioutil.ReadDir(".")
if err != nil {
return nil, err
}
validatorSet := validators.NewValidatorSetFromType(validatorType)
for _, file := range files {
path := file.Name()
if !file.IsDir() || !strings.HasPrefix(path, prefix) {
continue
}
localSecretsManager, err := local.SecretsManagerFactory(
nil,
&secrets.SecretsManagerParams{
Logger: hclog.NewNullLogger(),
Extra: map[string]interface{}{
secrets.Path: path,
},
},
)
if err != nil {
return nil, err
}
address, err := getValidatorAddressFromSecretManager(localSecretsManager)
if err != nil {
return nil, err
}
switch validatorType {
case validators.ECDSAValidatorType:
if err := validatorSet.Add(&validators.ECDSAValidator{
Address: address,
}); err != nil {
return nil, err
}
case validators.BLSValidatorType:
blsPublicKey, err := getBLSPublicKeyBytesFromSecretManager(localSecretsManager)
if err != nil {
return nil, err
}
if err := validatorSet.Add(&validators.BLSValidator{
Address: address,
BLSPublicKey: blsPublicKey,
}); err != nil {
return nil, err
}
}
}
return validatorSet, nil
}
func getValidatorAddressFromSecretManager(manager secrets.SecretsManager) (types.Address, error) {
if !manager.HasSecret(secrets.ValidatorKey) {
return types.ZeroAddress, ErrECDSAKeyNotFound
}
keyBytes, err := manager.GetSecret(secrets.ValidatorKey)
if err != nil {
return types.ZeroAddress, err
}
privKey, err := crypto.BytesToECDSAPrivateKey(keyBytes)
if err != nil {
return types.ZeroAddress, err
}
return crypto.PubKeyToAddress(&privKey.PublicKey), nil
}
func getBLSPublicKeyBytesFromSecretManager(manager secrets.SecretsManager) ([]byte, error) {
if !manager.HasSecret(secrets.ValidatorBLSKey) {
return nil, ErrBLSKeyNotFound
}
keyBytes, err := manager.GetSecret(secrets.ValidatorBLSKey)
if err != nil {
return nil, err
}
secretKey, err := crypto.BytesToBLSSecretKey(keyBytes)
if err != nil {
return nil, err
}
pubKey, err := secretKey.GetPublicKey()
if err != nil {
return nil, err
}
pubKeyBytes, err := pubKey.MarshalBinary()
if err != nil {
return nil, err
}
return pubKeyBytes, nil
}