public JObject GetNep17Balances(JArray _params)
{
UInt160 userScriptHash = GetScriptHashFromParam(_params[0].AsString());
JObject json = new JObject();
JArray balances = new JArray();
json["balance"] = balances;
json["address"] = userScriptHash.ToAddress(System.Settings.AddressVersion);
using (Iterator it = _db.NewIterator(ReadOptions.Default))
{
byte[] prefix = Key(Nep17BalancePrefix, userScriptHash);
for (it.Seek(prefix); it.Valid(); it.Next())
{
ReadOnlySpan <byte> key_bytes = it.Key();
if (!key_bytes.StartsWith(prefix))
{
break;
}
Nep17BalanceKey key = key_bytes[1..].AsSerializable <Nep17BalanceKey>();
private void HandleNotification(DataCache snapshot, IVerifiable scriptContainer, UInt160 scriptHash, string eventName,
VM.Types.Array stateItems,
Dictionary <Nep17BalanceKey, Nep17Balance> nep17BalancesChanged, ref ushort transferIndex)
{
if (stateItems.Count == 0)
{
return;
}
if (eventName != "Transfer")
{
return;
}
if (stateItems.Count < 3)
{
return;
}
if (!(stateItems[0].IsNull) && !(stateItems[0] is VM.Types.ByteString))
{
return;
}
if (!(stateItems[1].IsNull) && !(stateItems[1] is VM.Types.ByteString))
{
return;
}
var amountItem = stateItems[2];
if (!(amountItem is VM.Types.ByteString || amountItem is VM.Types.Integer))
{
return;
}
byte[] fromBytes = stateItems[0].IsNull ? null : stateItems[0].GetSpan().ToArray();
if (fromBytes != null && fromBytes.Length != UInt160.Length)
{
return;
}
byte[] toBytes = stateItems[1].IsNull ? null : stateItems[1].GetSpan().ToArray();
if (toBytes != null && toBytes.Length != UInt160.Length)
{
return;
}
if (fromBytes == null && toBytes == null)
{
return;
}
var from = UInt160.Zero;
var to = UInt160.Zero;
if (fromBytes != null)
{
from = new UInt160(fromBytes);
var fromKey = new Nep17BalanceKey(from, scriptHash);
if (!nep17BalancesChanged.ContainsKey(fromKey))
{
nep17BalancesChanged.Add(fromKey, new Nep17Balance());
}
}
if (toBytes != null)
{
to = new UInt160(toBytes);
var toKey = new Nep17BalanceKey(to, scriptHash);
if (!nep17BalancesChanged.ContainsKey(toKey))
{
nep17BalancesChanged.Add(toKey, new Nep17Balance());
}
}
if (scriptContainer is Transaction transaction)
{
RecordTransferHistory(snapshot, scriptHash, from, to, amountItem.GetInteger(), transaction.Hash, ref transferIndex);
}
}