合约编译不过是为什么
如题,报出如下错误
环境 VS2017 4.71
// main
public static object Main(int op,string addr,string nickname="")
{
switch (op)
{
case 0:
return GetName(addr);
case 1:
return SetName(addr, nickname);
case 2:
return DelName(addr);
default:
return false;
}
}
-----------------------------------------
static string GetName(string addr)
{
if (!IsValidAddr(addr))
return "";
if(IsAddrHasName(addr))
{
byte[] nickname = Storage.Get(Storage.CurrentContext, addr);
return Encoding.UTF8.GetString(nickname);
}
return "";
}
-----------------------------------------------
static bool SetName(string addr,string nickname)
{
if (!IsValidAddr(addr))
return false;
if (nickname == null || nickname.Equals("") || nickname.Length < 2)
return false;
Storage.Put(Storage.CurrentContext, addr, nickname);
return true;
}
------------------------------------------------
static bool DelName (string addr)
{
if (!IsValidAddr(addr))
return false;
byte[] b = Storage.Get(Storage.CurrentContext, addr);
if (b.Length <= 0)
return false;
Storage.Delete(Storage.CurrentContext, addr);
return true;
}
-------------------------------------------------
static bool IsAddrHasName(string addr)
{
if (!IsValidAddr(addr))
return false;
byte[] b = Storage.Get(Storage.CurrentContext, addr);
return b.Length > 0;
}
-------------------------------------------------
static bool IsValidAddr(string addr)
{
// 这里未做处理
return addr.Length == 34;
}