public static InteropTransaction MakeInteropTx(Logger logger, NeoTx tx, NeoAPI api, string[] origSwapAddresses,
string coldStorage)
{
logger.Debug("checking tx: " + tx.Hash);
var swapAddresses = new List <Address>();
foreach (var addr in origSwapAddresses)
{
swapAddresses.Add(NeoWallet.EncodeAddress(addr));
}
List <InteropTransfer> interopTransfers = new List <InteropTransfer>();
var emptyTx = new InteropTransaction(Hash.Null, interopTransfers.ToArray());
PBigInteger amount;
var witness = tx.witnesses.ElementAtOrDefault(0);
if (witness == null)
{
// tx has no witness
return(emptyTx);
}
var interopAddress = witness.ExtractAddress();
if (tx.witnesses.Length != 1 || interopAddress == Address.Null || interopAddress == null)
{
//currently only one witness allowed
// if ExtractAddress returns Address.Null, the tx is not properly signed
return(emptyTx);
}
var sourceScriptHash = witness.verificationScript.Sha256().RIPEMD160();
var sourceAddress = NeoWallet.EncodeByteArray(sourceScriptHash);
var sourceDecoded = NeoWallet.DecodeAddress(sourceAddress);
if (sourceAddress == interopAddress || sourceDecoded == coldStorage)
{
logger.Warning("self send tx or cold storage transfer found, ignoring: " + tx.Hash);
// self send, probably consolidation tx, ignore
return(emptyTx);
}
//logger.Debug("interop address: " + interopAddress);
//logger.Debug("xswapAddress: " + swapAddress);
//logger.Debug("interop sourceAddress: " + sourceAddress);
//logger.Debug("neo sourceAddress: " + NeoWallet.DecodeAddress(sourceAddress));
if (tx.attributes != null && tx.attributes.Length > 0)
{
foreach (var attr in tx.attributes)
{
if (attr.Usage == TransactionAttributeUsage.Description)
{
try
{
var text = Encoding.UTF8.GetString(attr.Data);
if (Address.IsValidAddress(text))
{
interopAddress = Address.FromText(text);
//logger.Debug("new interop address: " + interopAddress);
}
}
catch {}
}
}
}
if (tx.outputs.Length > 0)
{
foreach (var output in tx.outputs)
{
var targetAddress = NeoWallet.EncodeByteArray(output.scriptHash.ToArray());
//logger.Debug("interop targetAddress : " + targetAddress);
//logger.Debug("neo targetAddress: " + NeoWallet.DecodeAddress(targetAddress));
//logger.Debug("interopSwapAddress: " + interopSwapAddress);
//logger.Debug("targetAddress: " + targetAddress);
//var swpAddress = NeoWallet.EncodeAddress(swapAddress);
//logger.Debug("interop swpAddress: " + swpAddress);
//logger.Debug("neo swpAddress: " + NeoWallet.DecodeAddress(swpAddress));
//if (targetAddress.ToString() == swapAddress)
if (swapAddresses.Contains(targetAddress))
{
var token = FindSymbolFromAsset(new UInt256(output.assetID).ToString());
CryptoCurrencyInfo tokenInfo;
if (NeoTokenInfo.TryGetValue(token, out tokenInfo))
{
amount = Phantasma.Numerics.UnitConversion.ToBigInteger(
output.value, tokenInfo.Decimals);
}
else
{
// asset not swapable at the moment...
//logger.Debug("Asset not swapable");
return(emptyTx);
}
//logger.Debug("UTXO " + amount);
interopTransfers.Add
(
new InteropTransfer
(
NeoWallet.NeoPlatform,
sourceAddress,
DomainSettings.PlatformName,
targetAddress,
interopAddress, // interop address
token.ToString(),
amount
)
);
}
}
}
if (tx.script != null && tx.script.Length > 0) // NEP5 transfers
{
var script = NeoDisassembler.Disassemble(tx.script, true);
//logger.Debug("SCRIPT ====================");
//foreach (var entry in script.lines)
//{
// logger.Debug($"{entry.name} : { entry.opcode }");
//}
//logger.Debug("SCRIPT ====================");
if (script.lines.Count() < 7)
{
//logger.Debug("NO SCRIPT!!!!");
return(emptyTx);
}
var disasmEntry = script.lines.ElementAtOrDefault(6);
//if ( disasmEntry == null )
//{
// logger.Debug("disasmEntry is null");
//}
//if ( disasmEntry != null )
//{
// if ( disasmEntry.data == null)
// logger.Debug("disasmEntry.data is 0");
//}
if (disasmEntry.name != "APPCALL" || disasmEntry.data == null || disasmEntry.data.Length == 0)
{
//logger.Debug("NO APPCALL");
return(emptyTx);
}
else
{
var assetString = new UInt160(disasmEntry.data).ToString();
if (string.IsNullOrEmpty(assetString) || FindSymbolFromAsset(assetString) == null)
{
//logger.Debug("Ignore TX due to non swapable token.");
return(emptyTx);
}
}
int pos = 0;
foreach (var entry in script.lines)
{
pos++;
if (pos > 3)
{
// we are only interested in the first three elements
break;
}
if (entry.data == null || entry.data.Length == 0)
{
logger.Debug("Ignore tx, invalid data field: " + tx);
return(emptyTx);
}
if (pos == 1)
{
amount = PBigInteger.FromUnsignedArray(entry.data, true);
}
if (pos == 2 || pos == 3)
{
if (pos == 2)
{
if (entry.data == null || entry.data.Length == 0)
{
logger.Debug("Invalid op on pos 2, ignoring tx: " + tx);
return(emptyTx);
}
var targetScriptHash = new UInt160(entry.data);
//logger.Debug("neo targetAddress: " + targetScriptHash.ToAddress());
var targetAddress = NeoWallet.EncodeByteArray(entry.data);
//logger.Debug("targetAddress : " + targetAddress);
//logger.Debug("interopSwapAddress: " + interopSwapAddress);
//logger.Debug("SwapAddress: " + swapAddress);
if (swapAddresses.Contains(targetAddress))
{
// found a swap, call getapplicationlog now to get transaction details and verify the tx was actually processed.
ApplicationLog[] appLogs = null;
try
{
appLogs = api.GetApplicationLog(tx.Hash);
}
catch (Exception e)
{
logger.Error("Getting application logs failed: " + e.Message);
return(new InteropTransaction(Hash.Null, interopTransfers.ToArray()));
}
if (appLogs != null)
{
for (var i = 0; i < appLogs.Length; i++)
{
//logger.Debug("appLogs[i].contract" + appLogs[i].contract);
var token = FindSymbolFromAsset(appLogs[i].contract);
//logger.Debug("TOKEN::::::::::::::::::: " + token);
//logger.Debug("amount: " + appLogs[i].amount + " " + token);
var sadd = NeoWallet.EncodeByteArray(appLogs[i].sourceAddress.ToArray());
var tadd = NeoWallet.EncodeByteArray(appLogs[i].targetAddress.ToArray());
interopTransfers.Add
(
new InteropTransfer
(
"neo", // todo Pay.Chains.NeoWallet.NeoPlatform
//NeoWallet.EncodeByteArray(appLogs[i].sourceAddress.ToArray()),
sourceAddress,
DomainSettings.PlatformName,
targetAddress,
interopAddress, // interop address
token,
appLogs[i].amount
)
);
}
}
else
{
logger.Warning("Neo swap is found but application log is not available for tx " + tx.Hash);
}
}
}
else
{
//TODO reverse swap
sourceScriptHash = new UInt160(entry.data).ToArray();
sourceAddress = NeoWallet.EncodeByteArray(sourceScriptHash.ToArray());
}
}
}
}
var total = interopTransfers.Count();
if (total > 0)
{
logger.Message($"Found {total} swaps in neo tx {tx.Hash}");
}
else
{
logger.Debug($"No swaps in neo tx {tx.Hash}");
}
return((interopTransfers.Count() > 0)
? new InteropTransaction(Hash.Parse(tx.Hash.ToString()), interopTransfers.ToArray())
: new InteropTransaction(Hash.Null, interopTransfers.ToArray()));
}
