public InteropTransaction ReadTransaction(Hash hash)
{
var hashText = hash.ToString();
var apiCall = $"get_transaction/{hashText}";
var json = ExecuteRequest(apiCall);
if (json == null)
{
throw new OracleException("Network read failure: " + apiCall);
}
string inputSource = null;
try
{
var root = JSONReader.ReadFromString(json);
var scripts = root.GetNode("scripts");
Throw.IfNull(scripts, nameof(scripts));
if (scripts.ChildCount != 1)
{
throw new OracleException("Transactions with multiple sources not supported yet");
}
Address interopAddress = Address.Null;
foreach (var scriptEntry in scripts.Children)
{
var vs = scriptEntry.GetNode("verification");
if (vs == null)
{
continue;
}
var verificationScript = Base16.Decode(vs.Value);
var pubKey = new byte[33];
Core.Utils.ByteArrayUtils.CopyBytes(verificationScript, 1, pubKey, 0, 33);
var signatureScript = NeoKeys.CreateSignatureScript(pubKey);
var signatureHash = Neo.Utils.CryptoUtils.ToScriptHash(signatureScript);
inputSource = Neo.Utils.CryptoUtils.ToAddress(signatureHash);
pubKey = Core.Utils.ByteArrayUtils.ConcatBytes((byte)AddressKind.User, pubKey);
interopAddress = Address.FromBytes(pubKey);
break;
}
if (interopAddress.IsNull)
{
throw new OracleException("Could not fetch public key from transaction");
}
if (string.IsNullOrEmpty(inputSource))
{
throw new OracleException("Could not fetch source address from transaction");
}
var attrNodes = root.GetNode("attributes");
if (attrNodes != null)
{
foreach (var entry in attrNodes.Children)
{
var kind = entry.GetString("usage");
if (kind == "Description")
{
var data = entry.GetString("data");
var bytes = Base16.Decode(data);
var text = Encoding.UTF8.GetString(bytes);
if (Address.IsValidAddress(text))
{
interopAddress = Address.FromText(text);
}
}
}
}
return(FillTransaction(hashText, inputSource, interopAddress));
}
catch (Exception e)
{
throw new OracleException(e.Message);
}
}
