remove ethutil helpers (refactored), and keypair (key management under ethcrypto package)

ethutil/helpers.go

-package ethutil
-
-import (
-	"code.google.com/p/go.crypto/ripemd160"
-	"crypto/sha256"
-	"encoding/hex"
-	"github.com/obscuren/sha3"
-	"strconv"
-)
-
-func Uitoa(i uint32) string {
-	return strconv.FormatUint(uint64(i), 10)
-}
-
-func Sha256Bin(data []byte) []byte {
-	hash := sha256.Sum256(data)
-
-	return hash[:]
-}
-
-func Ripemd160(data []byte) []byte {
-	ripemd := ripemd160.New()
-	ripemd.Write(data)
-
-	return ripemd.Sum(nil)
-}
-
-func Sha3Bin(data []byte) []byte {
-	d := sha3.NewKeccak256()
-	d.Write(data)
-
-	return d.Sum(nil)
-}
-
-// Helper function for comparing slices
-func CompareIntSlice(a, b []int) bool {
-	if len(a) != len(b) {
-		return false
-	}
-	for i, v := range a {
-		if v != b[i] {
-			return false
-		}
-	}
-	return true
-}
-
-// Returns the amount of nibbles that match each other from 0 ...
-func MatchingNibbleLength(a, b []int) int {
-	i := 0
-	for CompareIntSlice(a[:i+1], b[:i+1]) && i < len(b) {
-		i += 1
-	}
-
-	return i
-}
-
-func Hex(d []byte) string {
-	return hex.EncodeToString(d)
-}
-func FromHex(str string) []byte {
-	h, _ := hex.DecodeString(str)
-	return h
-}

ethutil/keypair.go

-package ethutil
-
-import (
-	"github.com/obscuren/secp256k1-go"
-)
-
-type KeyPair struct {
-	PrivateKey []byte
-	PublicKey  []byte
-
-	// The associated account
-	account *StateObject
-}
-
-func GenerateNewKeyPair() (*KeyPair, error) {
-	_, prv := secp256k1.GenerateKeyPair()
-
-	return NewKeyPairFromSec(prv)
-}
-
-func NewKeyPairFromSec(seckey []byte) (*KeyPair, error) {
-	pubkey, err := secp256k1.GeneratePubKey(seckey)
-	if err != nil {
-		return nil, err
-	}
-
-	return &KeyPair{PrivateKey: seckey, PublicKey: pubkey}, nil
-}
-
-func NewKeyPairFromValue(val *Value) *KeyPair {
-	v, _ := NewKeyPairFromSec(val.Bytes())
-
-	return v
-}
-
-func (k *KeyPair) Address() []byte {
-	return Sha3Bin(k.PublicKey[1:])[12:]
-}
-
-func (k *KeyPair) RlpEncode() []byte {
-	return k.RlpValue().Encode()
-}
-
-func (k *KeyPair) RlpValue() *Value {
-	return NewValue(k.PrivateKey)
-}
-
-type KeyRing struct {
-	keys []*KeyPair
-}
-
-func (k *KeyRing) Add(pair *KeyPair) {
-	k.keys = append(k.keys, pair)
-}
-
-func (k *KeyRing) Get(i int) *KeyPair {
-	if len(k.keys) > i {
-		return k.keys[i]
-	}
-
-	return nil
-}
-
-func (k *KeyRing) Len() int {
-	return len(k.keys)
-}
-
-func (k *KeyRing) NewKeyPair(sec []byte) (*KeyPair, error) {
-	keyPair, err := NewKeyPairFromSec(sec)
-	if err != nil {
-		return nil, err
-	}
-
-	k.Add(keyPair)
-	Config.Db.Put([]byte("KeyRing"), k.RlpValue().Encode())
-
-	return keyPair, nil
-}
-
-func (k *KeyRing) Reset() {
-	Config.Db.Put([]byte("KeyRing"), nil)
-	k.keys = nil
-}
-
-func (k *KeyRing) RlpValue() *Value {
-	v := EmptyValue()
-	for _, keyPair := range k.keys {
-		v.Append(keyPair.RlpValue())
-	}
-
-	return v
-}
-
-// The public "singleton" keyring
-var keyRing *KeyRing
-
-func GetKeyRing() *KeyRing {
-	if keyRing == nil {
-		keyRing = &KeyRing{}
-
-		data, _ := Config.Db.Get([]byte("KeyRing"))
-		it := NewValueFromBytes(data).NewIterator()
-		for it.Next() {
-			v := it.Value()
-
-			key, err := NewKeyPairFromSec(v.Bytes())
-			if err != nil {
-				panic(err)
-			}
-			keyRing.Add(key)
-		}
-	}
-
-	return keyRing
-}