/// <summary>
///
/// </summary>
/// <param name="transfer"></param>
/// <returns></returns>
public static TransferModel ToTransferModel(this TransferNotifyItem transfer)
{
return(new TransferModel()
{
From = transfer.From,
To = transfer.To,
Amount = new BigDecimal(transfer.Amount, transfer.Decimals).ToString(),
Symbol = transfer.Symbol,
});
}
/// <summary>
/// try to convert "Transfer" event, missing "Decimals"、"Symbol"
/// </summary>
/// <param name="notification"></param>
/// <returns></returns>
public static TransferNotifyItem ConvertToTransfer(this NotifyEventArgs notification)
{
if (!"transfer".Equals(notification.EventName, StringComparison.OrdinalIgnoreCase) || notification.State.Count < 3)
{
return null;
}
var notify = notification.State;
var fromItem = notify[0];
var toItem = notify[1];
var amountItem = notify[2];
if (!fromItem.IsVmNullOrByteArray() || !toItem.IsVmNullOrByteArray())
{
return null;
}
var from = fromItem.GetByteSafely();
if (from != null && from.Length != UInt160.Length)
{
return null;
}
var to = toItem.GetByteSafely();
if (to != null && to.Length != UInt160.Length)
{
return null;
}
if (from == null && to == null)
{
return null;
}
if (amountItem.NotVmByteArray() && amountItem.NotVmInt())
{
return null;
}
var amount = amountItem.ToBigInteger();
if (amount == null)
{
return null;
}
var record = new TransferNotifyItem
{
From = from == null ? null : new UInt160(from),
To = to == null ? null : new UInt160(to),
Amount = amount.Value,
Asset = notification.ScriptHash,
};
return record;
}
public static TransferNotifyItem GetTransferNotify(this VmArray notifyArray, UInt160 asset)
{
if (notifyArray.Count < 4) return null;
// Event name should be encoded as a byte array.
if (notifyArray[0].NotVmByteArray()) return null;
var eventName = notifyArray[0].GetString();
if (!"Transfer".Equals(eventName, StringComparison.OrdinalIgnoreCase)) return null;
var fromItem = notifyArray[1];
if (fromItem.NotVmByteArray() && fromItem.NotVmNull()) return null;
var fromBytes = fromItem.GetByteSafely();
if (fromBytes?.Length != 20)
{
fromBytes = null;
}
var toItem = notifyArray[2];
if (toItem != null && toItem.NotVmByteArray()) return null;
byte[] toBytes = toItem.GetByteSafely();
if (toBytes?.Length != 20)
{
toBytes = null;
}
if (fromBytes == null && toBytes == null) return null;
var amountItem = notifyArray[3];
if (amountItem.NotVmByteArray() && amountItem.NotVmInt()) return null;
var transfer = new TransferNotifyItem()
{
Asset = asset,
From = fromBytes == null ? null : new UInt160(fromBytes),
To = new UInt160(toBytes),
Amount = amountItem.GetInteger(),
};
return transfer;
}
public static TransferNotifyItem GetTransferNotify(this VmArray notifyArray, UInt160 asset)
{
if (notifyArray.Count < 4)
{
return(null);
}
// Event name should be encoded as a byte array.
if (notifyArray[0].NotVmByteArray())
{
return(null);
}
var eventName = notifyArray[0].GetString();
if (eventName != "Transfer")
{
return(null);
}
var fromItem = notifyArray[1];
if (fromItem.NotVmByteArray() && fromItem.NotVmNull())
{
return(null);
}
var fromBytes = fromItem.GetByteSafely();
if (fromBytes?.Length != 20)
{
fromBytes = null;
}
var toItem = notifyArray[2];
if (toItem != null && toItem.NotVmByteArray())
{
return(null);
}
byte[] toBytes = toItem.GetByteSafely();
if (toBytes?.Length != 20)
{
toBytes = null;
}
if (fromBytes == null && toBytes == null)
{
return(null);
}
var amountItem = notifyArray[3];
if (amountItem.NotVmByteArray() && amountItem.NotVmInt())
{
return(null);
}
var transfer = new TransferNotifyItem()
{
Asset = asset,
From = fromBytes == null ? null : new UInt160(fromBytes),
To = new UInt160(toBytes),
Amount = amountItem.GetBigInteger(),
};
return(transfer);
}
