new account compatible with eth (#27)

new account compatible with eth

account.go

@@ -5,6 +5,8 @@
 package sdk
 
 import (
+	"crypto/ecdsa"
+	crand "crypto/rand"
 	"encoding/hex"
 	"errors"
 	"fmt"
@@ -56,6 +58,26 @@ func (m *AccountManager) Create(passphrase string) (types.Address, error) {
 	return cfxAddress, nil
 }
 
+// CreateEthCompatible creates a new account compatible with eth and puts the keystore file into keystore directory
+func (m *AccountManager) CreateEthCompatible(passphrase string) (types.Address, error) {
+	for {
+		privateKeyECDSA, err := ecdsa.GenerateKey(crypto.S256(), crand.Reader)
+		if err != nil {
+			return "", err
+		}
+
+		addr := crypto.PubkeyToAddress(privateKeyECDSA.PublicKey)
+
+		if addr.Bytes()[0]&0xf0 == 0x10 {
+			account, err := m.ks.ImportECDSA(privateKeyECDSA, passphrase)
+			if err != nil {
+				return "", err
+			}
+			return *types.NewAddressFromCommon(account.Address), nil
+		}
+	}
+}
+
 // Import imports account from external key file to keystore directory.
 // Returns error if the account already exists.
 func (m *AccountManager) Import(keyFile, passphrase, newPassphrase string) (types.Address, error) {

types/types.go

@@ -21,6 +21,12 @@ func NewAddress(hexAddress string) *Address {
 	return &addr
 }
 
+// NewAddressFromCommon creates an address from common.Address
+func NewAddressFromCommon(address common.Address) *Address {
+	hex := hexutil.Encode(address[:])
+	return NewAddress(hex)
+}
+
 // String implements the interface stringer
 func (address *Address) String() string {
 	return string(*address)