/// <summary>
/// Deserializes the given byte array starting from the specified offset. The return value indicates success.
/// </summary>
/// <param name="data">Byte array containing an <see cref="TxIn"/>.</param>
/// <param name="offset">The offset inside the <paramref name="data"/> to start from.</param>
/// <param name="error">Error message (null if sucessful, otherwise will contain information about the failure).</param>
/// <returns>True if deserialization was successful, false if otherwise.</returns>
public bool TryDeserialize(byte[] data, ref int offset, out string error)
{
if (offset < 0)
{
error = "Offset can not be negative.";
return(false);
}
if (data == null || data.Length - offset < MinSize)
{
error = "Data length is not valid.";
return(false);
}
// TODO: Outpoint and SigScript could be null, perform a check?
if (!Outpoint.TryDeserialize(data, ref offset, out error))
{
return(false);
}
if (!SigScript.TryDeserialize(data, ref offset, out error))
{
return(false);
}
Sequence = data.SubArray(offset, sizeof(uint)).ToUInt32(false);
offset += sizeof(uint);
error = null;
return(true);
}
private void SetFields()
{
CompactInt temp = new CompactInt(10000 /*coin.ScriptSigMaxLength*/);
int opSize = new Outpoint().Size;
MinSize = opSize + 1 + 0 + sizeof(uint);
MaxSize = opSize + temp.ToByteArray().Length + 10000 + sizeof(uint);
}
/// <summary>
/// Initializes a new instance of <see cref="TxIn"/> using given parameters.
/// </summary>
/// <exception cref="ArgumentNullException"/>
/// <param name="op">Transaction output</param>
/// <param name="sigScript">Signature script</param>
/// <param name="seq">Sequence</param>
public TxIn(Outpoint op, SignatureScript sigScript, uint seq)
{
SetFields();
if (op == null)
{
throw new ArgumentNullException(nameof(op), "Outpoint can not be null!");
}
if (sigScript == null)
{
throw new ArgumentNullException(nameof(sigScript), "Signature script can not be null!");
}
Outpoint = op;
SigScript = sigScript;
Sequence = seq;
}
/// <summary>
/// Converts this instance into its byte array representation.
/// </summary>
/// <exception cref="ArgumentNullException"/>
/// <returns>An array of bytes</returns>
public byte[] Serialize()
{
if (Outpoint == null)
{
throw new ArgumentNullException(nameof(Outpoint), "Outpoint can not be null.");
}
if (SigScript == null)
{
throw new ArgumentNullException(nameof(SigScript), "Signature script can not be null!");
}
return(ByteArray.ConcatArrays(
Outpoint.Serialize(),
SigScript.Serialize(),
Sequence.ToByteArray(false)
));
}
/// <summary>
/// Initializes a new instance of <see cref="TxIn"/> using parameters of the <see cref="ICoin"/>.
/// </summary>
public TxIn()
{
SetFields();
Outpoint = new Outpoint();
SigScript = new SignatureScript();
}
