public async Task <object> TestingTransfer(string from, string privateKey, string to, IAsset asset, decimal amount)
{
var nodeHttp = new NodeHttp(_nemUrl);
var networkType = await nodeHttp.GetNetworkType();
var networkTime = (int)(await nodeHttp.GetExtendedNodeInfo()).NisInfo.CurrentTime;
var toAddressParts = to.Split(AddressSeparator);
var message = toAddressParts.Length > 1
? PlainMessage.Create(toAddressParts[1]) as IMessage
: EmptyMessage.Create();
var mosaic = Mosaic.CreateFromIdentifier(asset.AssetId, (ulong)asset.ToBaseUnit(amount));
var fee = await TransferTransaction.CalculateFee(networkType, message, new[] { mosaic }, new NamespaceMosaicHttp(_nemUrl));
var tx = TransferTransaction.Create(
networkType,
new Deadline(networkTime + _expiresInSeconds),
fee.fee,
Address.CreateFromEncoded(toAddressParts[0]),
new List <Mosaic> {
mosaic
},
message,
networkTime);
var signed = tx.SignWith(KeyPair.CreateFromPrivateKey(privateKey));
var result = await new TransactionHttp(_nemUrl).Announce(signed);
return(result);
}
public async Task <(string transactionContext, decimal fee, long expiration)> BuildTransactionAsync(Guid operationId,
IAsset asset, IReadOnlyList <IOperationAction> actions, bool includeFee)
{
// from one side NEM supports single sender and single receiver per transaction,
// from the other side we support single asset per transaction,
// finally only single transfers are allowed
if (actions.Count != 1)
{
throw new ArgumentException("Transaction must contain a single transfer only");
}
var nodeHttp = new NodeHttp(_nemUrl);
var networkType = await nodeHttp.GetNetworkType();
var action = actions[0];
var toAddressParts = action.To.Split(AddressSeparator);
var toAddress = toAddressParts[0];
var memo = toAddressParts.Length > 1
? toAddressParts[1]
: "";
var message = !string.IsNullOrEmpty(memo)
? PlainMessage.Create(memo) as IMessage
: EmptyMessage.Create();
var mosaic = Mosaic.CreateFromIdentifier(asset.AssetId, (ulong)asset.ToBaseUnit(action.Amount));
var fee = await TransferTransaction.CalculateFee(networkType, message, new[] { mosaic }, new NamespaceMosaicHttp(_nemUrl));
if (includeFee)
{
try
{
checked
{
if (mosaic.NamespaceName == Xem.NamespaceName &&
mosaic.MosaicName == Xem.MosaicName)
{
mosaic.Amount -= fee.fee;
}
// only single transfers are supported,
// so there must be single levy
var levy = fee.levies.SingleOrDefault();
if (levy != null &&
mosaic.NamespaceName == levy.NamespaceName &&
mosaic.MosaicName == levy.MosaicName)
{
mosaic.Amount -= levy.Amount;
}
}
}
catch (OverflowException)
{
throw new BlockchainException(BlockchainErrorCode.AmountIsTooSmall, "Amount is less than fee");
}
}
// check balances of FromAddress for all required assets
var fromAddress = action.From.Split(AddressSeparator)[0];
var owned = await new AccountHttp(_nemUrl).MosaicsOwned(Address.CreateFromEncoded(fromAddress));
var required = fee.levies
.Append(Xem.CreateAbsolute(fee.fee))
.Append(mosaic)
.GroupBy(m => new { m.NamespaceName, m.MosaicName })
.Select(g => new Mosaic(g.Key.NamespaceName, g.Key.MosaicName, g.Aggregate(0UL, (v, m) => v += m.Amount)))
.ToList();
foreach (var req in required)
{
var own = owned.FirstOrDefault(m => m.NamespaceName == req.NamespaceName && m.MosaicName == req.MosaicName)?.Amount ?? 0UL;
if (own < req.Amount)
{
throw new BlockchainException(BlockchainErrorCode.NotEnoughBalance,
$"Not enough {req.NamespaceName}:{req.MosaicName}");
}
}
var networkTime = (int)(await nodeHttp.GetExtendedNodeInfo()).NisInfo.CurrentTime;
var tx = TransferTransaction.Create(
networkType,
new Deadline(networkTime + _expiresInSeconds),
fee.fee,
Address.CreateFromEncoded(toAddress),
new List <Mosaic> {
mosaic
},
message,
networkTime);
return(
tx.ToJson(),
Convert.ToDecimal(fee.fee * 1e-6),
tx.Deadline.GetInstant()
);
}