1 files changed, 74 insertions, 0 deletions
diff --git a/ethchain/keypair.go b/ethchain/keypair.go
new file mode 100644
index 000000000..9fdc95972
--- /dev/null
+++ b/ethchain/keypair.go
@@ -0,0 +1,74 @@
+package ethchain
+
+import (
+	"github.com/ethereum/eth-go/ethutil"
+	"math/big"
+)
+
+type KeyPair struct {
+	PrivateKey []byte
+	PublicKey  []byte
+
+	// The associated account
+	account *Account
+	state   *State
+}
+
+func NewKeyPairFromValue(val *ethutil.Value) *KeyPair {
+	keyPair := &KeyPair{PrivateKey: val.Get(0).Bytes(), PublicKey: val.Get(1).Bytes()}
+
+	return keyPair
+}
+
+func (k *KeyPair) Address() []byte {
+	return ethutil.Sha3Bin(k.PublicKey[1:])[12:]
+}
+
+func (k *KeyPair) Account() *Account {
+	if k.account == nil {
+		k.account = k.state.GetAccount(k.Address())
+	}
+
+	return k.account
+}
+
+// Create transaction, creates a new and signed transaction, ready for processing
+func (k *KeyPair) CreateTx(receiver []byte, value *big.Int, data []string) *Transaction {
+	tx := NewTransaction(receiver, value, data)
+	tx.Nonce = k.account.Nonce
+
+	// Sign the transaction with the private key in this key chain
+	tx.Sign(k.PrivateKey)
+
+	return tx
+}
+
+func (k *KeyPair) RlpEncode() []byte {
+	return ethutil.EmptyValue().Append(k.PrivateKey).Append(k.PublicKey).Encode()
+}
+
+type KeyRing struct {
+	keys []*KeyPair
+}
+
+func (k *KeyRing) Add(pair *KeyPair) {
+	k.keys = append(k.keys, pair)
+}
+
+// The public "singleton" keyring
+var keyRing *KeyRing
+
+func GetKeyRing(state *State) *KeyRing {
+	if keyRing == nil {
+		keyRing = &KeyRing{}
+
+		data, _ := ethutil.Config.Db.Get([]byte("KeyRing"))
+		it := ethutil.NewValueFromBytes(data).NewIterator()
+		for it.Next() {
+			v := it.Value()
+			keyRing.Add(NewKeyPairFromValue(v))
+		}
+	}
+
+	return keyRing
+}