public static string CreateNewRawTx(BitcoinTransaction btx)
{
StringBuilder rawTx = new StringBuilder();
// 1) 4 byte - version
// *Now CompactSize
UInt32 version = btx.Version;
rawTx.Append(MakeCompactSize(version));
// 2) ? byte - tx_in count (compactSize uint)
rawTx.Append(MakeCompactSize(btx.TxInCount));
for (UInt64 i = 0; i < btx.TxInCount; i++)
{
// 3) 32 byte - TX hash (reverse)
string txToSend = btx.TxInList[i].TxId;
rawTx.Append(ReverseTx(txToSend));
// 4) 4 byte - output Index
// *Now CompactSize
rawTx.Append(MakeCompactSize(btx.TxInList[i].OutIndex));
// 5) ? byte - scriptSig length (compactSize uint) (Maximum value is 10,000 bytes)
rawTx.Append(MakeCompactSize((UInt64)btx.TxInList[i].ScriptSigLength));
// 6) ? byte - scriptSig which is filled with scriptPubkey temporarily (20 is half the length of address hash160)
rawTx.Append(btx.TxInList[i].ScriptSig);
//7) 4 byte - sequence - max is 0xffffffff - can change for RBF transactions
UInt32 sequence = UInt32.MaxValue;
rawTx.Append(IntToHex(sequence, 4));
}
//8) ? byte - tx_out count (compactSize uint)
rawTx.Append(MakeCompactSize(btx.TxOutCount));
for (UInt64 i = 0; i < btx.TxOutCount; i++)
{
//9) 8 byte - amout to transfer
rawTx.Append(MakeCompactSize(btx.TxOutList[i].Amount));
//10) ? byte - pk_script length (compactSize uint)
rawTx.Append(MakeCompactSize((UInt64)btx.TxOutList[i].PkScriptLength));
//11) ? byte - pk_script
rawTx.Append(btx.TxOutList[i].PkScript);
}
//12) 4 byte - lock time
// *Now CompactSize
rawTx.Append(MakeCompactSize(btx.LockTime));
return(rawTx.ToString());
}
static List <BitcoinTransaction> Deserialize(string raw, ref int index, UInt64 loopCount)
{
List <BitcoinTransaction> result = new List <BitcoinTransaction>();
List <int> txSize = new List <int>();
for (UInt64 j = 0; j < loopCount; j++)
{
BitcoinTransaction btx = new BitcoinTransaction();
int size = index;
// 1) 4 byte - version
string version = raw.Substring(index, 8);
btx.Version = (UInt32)HexToUInt(version);
index += 8;
// 2) ? byte - tx_in count (CompactSize uint)
btx.TxInCount = ReadCompactSize(raw, ref index);
// Initialize the array
btx.TxInList = new TxIn[btx.TxInCount];
for (UInt64 i = 0; i < btx.TxInCount; i++)
{
TxIn temp = new TxIn();
// 3) 32 byte - TX hash (reverse)
temp.TxId = raw.Substring(index, 64);
temp.TxId = ReverseTx(temp.TxId);
index += 64;
// 4) 4 byte - output Index
string outIndex = raw.Substring(index, 8);
temp.OutIndex = (UInt32)HexToUInt(outIndex);
index += 8;
// 5) ? byte - scriptSig length (CompactSize uint) (Maximum value is 10,000 bytes)
string scriptSigLength = raw.Substring(index, 2);
temp.ScriptSigLength = (int)ReadCompactSize(raw, ref index);
// 6) ? byte - scriptSig or a placeholder for unsigned (can be empty too)
temp.ScriptSig = raw.Substring(index, temp.ScriptSigLength * 2);
index += temp.ScriptSigLength * 2;
//7) 4 byte - sequence - max is 0xffffffff - can change for RBF transactions
string sequence = raw.Substring(index, 8);
temp.Sequence = (UInt32)HexToUInt(sequence);
index += 8;
btx.TxInList[i] = temp;
}
//8) ? byte - tx_out count (compactSize uint)
btx.TxOutCount = ReadCompactSize(raw, ref index);
// Initialize the array
btx.TxOutList = new TxOut[btx.TxOutCount];
for (UInt64 i = 0; i < btx.TxOutCount; i++)
{
TxOut temp = new TxOut();
//9) 8 byte - amout to transfer
string amount = raw.Substring(index, 16);
temp.Amount = HexToUInt(amount);
index += 16;
//10) ? byte - pk_script length (compactSize uint)
string pkScriptLength = raw.Substring(index, 2);
temp.PkScriptLength = (Int32)HexToUInt(pkScriptLength);
index += 2;
//11) ? byte - pk_script
temp.PkScript = raw.Substring(index, temp.PkScriptLength * 2);
index += temp.PkScriptLength * 2;
btx.TxOutList[i] = temp;
}
//12) 4 byte - lock time
string lockTime = raw.Substring(index, 8);
btx.LockTime = (UInt32)HexToUInt(lockTime);
index += 8;
result.Add(btx);
txSize.Add((index - size) / 2);
}
AverageSize = txSize.Average();
return(result);
}