Implemented managed state

* Reimplemented nonce management for known accounts.

state/managed_state_test.go

@@ -0,0 +1,54 @@
+package state
+
+import "testing"
+
+var addr = []byte("test")
+
+func create() (*ManagedState, *account) {
+	ms := ManageState(nil)
+	ms.accounts[string(addr)] = newAccount(&StateObject{nonce: 100})
+
+	return ms, ms.accounts[string(addr)]
+}
+
+func TestNewNonce(t *testing.T) {
+	ms, _ := create()
+
+	nonce := ms.NewNonce(addr)
+	if nonce != 100 {
+		t.Error("expected nonce 101. got", nonce)
+	}
+}
+
+func TestRemove(t *testing.T) {
+	ms, account := create()
+
+	nn := make([]bool, 10)
+	for i, _ := range nn {
+		nn[i] = true
+	}
+	account.nonces = append(account.nonces, nn...)
+
+	i := uint64(5)
+	ms.RemoveNonce(addr, account.nstart+i)
+	if len(account.nonces) != 5 {
+		t.Error("expected", i, "'th index to be false")
+	}
+}
+
+func TestReuse(t *testing.T) {
+	ms, account := create()
+
+	nn := make([]bool, 10)
+	for i, _ := range nn {
+		nn[i] = true
+	}
+	account.nonces = append(account.nonces, nn...)
+
+	i := uint64(5)
+	ms.RemoveNonce(addr, account.nstart+i)
+	nonce := ms.NewNonce(addr)
+	if nonce != 105 {
+		t.Error("expected nonce to be 105. got", nonce)
+	}
+}