/// <summary>
/// Extract ConsentAction information from OP_RETURN part
/// </summary>
/// <param name="transaction">The transaction to be extracted information from</param>
/// <returns>If information is present, ConsentAction object is returned. Otherwise, null is returned.</returns>
public static ConsentAction AsConsentAction(this ApiTransaction transaction)
{
try
{
var ca = new ConsentAction();
var op_return = transaction.GetOP_RETURN();
if (string.IsNullOrEmpty(op_return) || !op_return.StartsWith("43504d4f2d5448"))
{
return(null);
}
var firstIndex = op_return.IndexOf("3a");
ca.Domain = Encoding.ASCII.GetString(FromHex(op_return.Substring(0, firstIndex)));
var secondIndex = op_return.IndexOf("3a", firstIndex + 2);
var action = Encoding.ASCII.GetString(FromHex(op_return.Substring(firstIndex + 2, secondIndex - firstIndex - 2)));
ca.DocumentHash = op_return.Substring(secondIndex + 2);
if (ca.DocumentHash.Length > 64)
{
return(null);
}
if (action == "ASK")
{
ca.AskFrom = transaction.vin[0].addr;
ca.AskTxId = transaction.txid;
ca.AskTick = transaction.blocktime;
ca.ApproveFrom = transaction.vout.First(v => v.scriptPubKey.addresses != null && v.scriptPubKey.addresses[0] != ca.AskFrom).scriptPubKey.addresses[0];
return(ca);
}
else if (action == "APPROVE")
{
ca.ApproveFrom = transaction.vin[0].addr;
ca.AskFrom = transaction.vout.First(v => v.scriptPubKey.addresses != null && v.scriptPubKey.addresses[0] != ca.AskFrom).scriptPubKey.addresses[0];
ca.ApproveTxId = transaction.txid;
ca.ApprovedTick = transaction.blocktime;
return(ca);
}
else
{
return(null);
}
}
catch (Exception)
{
return(null);
}
}
public static Ledger ToLedger(this ApiTransaction transaction, WalletContract contract, ContractService service)
{
var ledger = new Ledger()
{
TxId = transaction.txid,
Blockheight = transaction.blockheight,
Time = new DateTime(1970, 1, 1).AddSeconds(transaction.blocktime)
};
var domain = BitConverter.ToString(Encoding.Default.GetBytes("RMUTSB.AC.TH")).Replace("-", "").ToLower();
//var domain = "54534357414c4c4554";
var data = transaction.GetOP_RETURN();
try
{
if (data.StartsWith(domain))
{
return(null);
}
var contractNameHex = data.Substring(0, 16);
if (contract.NameHex == contractNameHex)
{
ledger.Operation = (OperationCode)(ushort.Parse(data.Substring(16, 4), System.Globalization.NumberStyles.HexNumber));
var publicAddress = transaction.vin.First(v => !string.IsNullOrEmpty(v.addr)).addr;
var publicKey = new BitcoinPubKeyAddress(publicAddress, service.MainNetwork);
ledger.TokenSenderHash = publicKey.ExtractWitnessProgram();
ledger.TokenReceiverHashHex = data.Substring(20, 40);
ledger.Amount = BitConverterExtension.ToDecimal(data.Substring(60, 32).StringToByteArray());
if (data.Length > 92)
{
ledger.ReferenceCode = Encoding.Default.GetString(data.Substring(92).StringToByteArray());
}
return(ledger);
}
else
{
return(null);
}
}
catch (Exception e)
{
Debug.WriteLine(e.Message);
return(null);
}
}