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accounts.go
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accounts.go
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package env
import (
"crypto/ecdsa"
"encoding/hex"
"encoding/json"
"fmt"
"log"
"github.com/celo-org/celo-blockchain/accounts"
"github.com/celo-org/celo-blockchain/common"
"github.com/celo-org/celo-blockchain/crypto"
blscrypto "github.com/celo-org/celo-blockchain/crypto/bls"
"github.com/celo-org/celo-blockchain/mycelo/hdwallet"
"github.com/celo-org/celo-bls-go/bls"
"github.com/tyler-smith/go-bip39"
)
// MustNewMnemonic creates a new mnemonic (panics on error)
func MustNewMnemonic() string {
res, err := NewMnemonic()
if err != nil {
panic(err)
}
return res
}
// NewMnemonic creates a new mnemonic
func NewMnemonic() (string, error) {
entropy, err := bip39.NewEntropy(128)
if err != nil {
return "", err
}
return bip39.NewMnemonic(entropy)
}
// Account represents a Celo Account
type Account struct {
Address common.Address
PrivateKey *ecdsa.PrivateKey
}
// MarshalJSON implements json.Marshaler
func (a Account) MarshalJSON() ([]byte, error) {
var data = struct {
PrivateKey string
Address common.Address
}{
PrivateKey: hex.EncodeToString(crypto.FromECDSA(a.PrivateKey)),
Address: a.Address,
}
return json.Marshal(data)
}
// MustBLSProofOfPossession variant of BLSProofOfPossession that panics on error
func (a *Account) MustBLSProofOfPossession() []byte {
pop, err := a.BLSProofOfPossession()
if err != nil {
panic(err)
}
return pop
}
// BLSProofOfPossession generates bls proof of possession
func (a *Account) BLSProofOfPossession() ([]byte, error) {
privateKeyBytes, err := blscrypto.ECDSAToBLS(a.PrivateKey)
if err != nil {
return nil, err
}
privateKey, err := bls.DeserializePrivateKey(privateKeyBytes)
if err != nil {
return nil, err
}
defer privateKey.Destroy()
signature, err := privateKey.SignPoP(a.Address.Bytes())
if err != nil {
return nil, err
}
defer signature.Destroy()
signatureBytes, err := signature.Serialize()
if err != nil {
return nil, err
}
return signatureBytes, nil
}
// BLSPublicKey returns the bls public key
func (a *Account) BLSPublicKey() (blscrypto.SerializedPublicKey, error) {
privateKey, err := blscrypto.ECDSAToBLS(a.PrivateKey)
if err != nil {
return blscrypto.SerializedPublicKey{}, err
}
return blscrypto.PrivateToPublic(privateKey)
}
// PublicKeyHex hex representation of the public key
func (a *Account) PublicKey() []byte {
return crypto.FromECDSAPub(&a.PrivateKey.PublicKey)
}
// PrivateKeyHex hex representation of the private key
func (a *Account) PrivateKeyHex() string {
return common.Bytes2Hex(crypto.FromECDSA(a.PrivateKey))
}
func (a *Account) String() string {
return fmt.Sprintf("{ address: %s\tprivateKey: %s }",
a.Address.Hex(),
a.PrivateKeyHex(),
)
}
// AccountType represents the different account types for the generator
type AccountType int
// The difference account types for the generator
var (
ValidatorAT AccountType = 0
DeveloperAT AccountType = 1 // load test
TxNodeAT AccountType = 2
BootnodeAT AccountType = 3
FaucetAT AccountType = 4
AttestationAT AccountType = 5
PriceOracleAT AccountType = 6
ProxyAT AccountType = 7
AttestationBotAT AccountType = 8
VotingBotAT AccountType = 9
TxNodePrivateAT AccountType = 10
ValidatorGroupAT AccountType = 11 // Not in celotool (yet)
AdminAT AccountType = 12 // Not in celotool (yet)
TxFeeRecipientAT AccountType = 13 // Not in celotool (yet)
)
// String implements the stringer interface.
func (accountType AccountType) String() string {
switch accountType {
case ValidatorAT:
return "validator"
case DeveloperAT:
return "developer"
case TxNodeAT:
return "txNode"
case FaucetAT:
return "faucet"
case AttestationAT:
return "attestation"
case PriceOracleAT:
return "priceOracle"
case ProxyAT:
return "proxy"
case AttestationBotAT:
return "attestationBot"
case VotingBotAT:
return "votingBot"
case TxNodePrivateAT:
return "txNodePrivate"
case ValidatorGroupAT:
return "validatorGroup"
case AdminAT:
return "admin"
default:
return "unknown"
}
}
// MarshalText marshall account type into text
func (accountType AccountType) MarshalText() ([]byte, error) {
switch accountType {
case ValidatorAT:
return []byte("validator"), nil
case DeveloperAT:
return []byte("developer"), nil
case TxNodeAT:
return []byte("txNode"), nil
case FaucetAT:
return []byte("faucet"), nil
case AttestationAT:
return []byte("attestation"), nil
case PriceOracleAT:
return []byte("priceOracle"), nil
case ProxyAT:
return []byte("proxy"), nil
case AttestationBotAT:
return []byte("attestationBot"), nil
case VotingBotAT:
return []byte("votingBot"), nil
case TxNodePrivateAT:
return []byte("txNodePrivate"), nil
case ValidatorGroupAT:
return []byte("validatorGroup"), nil
case AdminAT:
return []byte("admin"), nil
default:
return nil, fmt.Errorf("unknown account type %d", accountType)
}
}
// UnmarshalText creates AccountType from string
func (accountType *AccountType) UnmarshalText(text []byte) error {
switch string(text) {
case "validator":
*accountType = ValidatorAT
case "developer":
*accountType = DeveloperAT
case "txNode":
*accountType = TxNodeAT
case "faucet":
*accountType = FaucetAT
case "attestation":
*accountType = AttestationAT
case "priceOracle":
*accountType = PriceOracleAT
case "proxy":
*accountType = ProxyAT
case "attestationBot":
*accountType = AttestationBotAT
case "votingBot":
*accountType = VotingBotAT
case "txNodePrivate":
*accountType = TxNodePrivateAT
case "validatorGroup":
*accountType = ValidatorGroupAT
case "admin":
*accountType = AdminAT
default:
return fmt.Errorf(`unknown account type %q, want "validator", "developer", "txNode", "faucet", "attestation", "priceOracle", "proxy", "attestationBot", "votingBot", "txNodePrivate", "validatorGroup", "admin"`, text)
}
return nil
}
func mustDerivationPath(accountType AccountType, idx int) accounts.DerivationPath {
return hdwallet.MustParseDerivationPath(fmt.Sprintf("m/%d/%d", int(accountType), idx))
}
// DeriveAccount will derive the account corresponding to (accountType, idx) using the
// given mnemonic
func DeriveAccount(mnemonic string, accountType AccountType, idx int) (*Account, error) {
wallet, err := hdwallet.NewFromMnemonic(mnemonic)
if err != nil {
return nil, err
}
account, err := wallet.Derive(mustDerivationPath(accountType, idx), false)
if err != nil {
return nil, err
}
pk, err := wallet.PrivateKey(account)
if err != nil {
return nil, err
}
return &Account{
Address: account.Address,
PrivateKey: pk,
}, nil
}
// DeriveAccountList will generate the desired number of accounts using mnemonic & accountType
func DeriveAccountList(mnemonic string, accountType AccountType, qty int) ([]Account, error) {
wallet, err := hdwallet.NewFromMnemonic(mnemonic)
if err != nil {
log.Fatal(err)
}
accounts := make([]Account, qty)
for i := 0; i < qty; i++ {
account, err := wallet.Derive(mustDerivationPath(accountType, i), false)
if err != nil {
return nil, err
}
pk, err := wallet.PrivateKey(account)
if err != nil {
return nil, err
}
accounts[i] = Account{
Address: account.Address,
PrivateKey: pk,
}
}
return accounts, nil
}
// MustGenerateRandomAccount creates new account or panics
func MustGenerateRandomAccount() Account {
acc, err := GenerateRandomAccount()
if err != nil {
panic(err)
}
return acc
}
// GenerateRandomAccount creates a random new account
func GenerateRandomAccount() (Account, error) {
privateKey, err := crypto.GenerateKey()
if err != nil {
return Account{}, err
}
return NewAccount(privateKey), nil
}
// NewAccount creates a new account for the specified private key
func NewAccount(key *ecdsa.PrivateKey) Account {
return Account{
PrivateKey: key,
Address: crypto.PubkeyToAddress(key.PublicKey),
}
}
// UnmarshalJSON implements json.Unmarshaler
func (a *Account) UnmarshalJSON(b []byte) error {
var data struct {
PrivateKey string
Address common.Address
}
if err := json.Unmarshal(b, &data); err != nil {
return err
}
a.Address = data.Address
key, err := crypto.HexToECDSA(data.PrivateKey)
if err != nil {
return err
}
a.PrivateKey = key
return nil
}