/// <summary>
/// Calculates checksum (first 4 bytes of 2x SHA256) of a given byte array.
/// </summary>
/// <exception cref="ArgumentNullException"/>
/// <param name="data">An array of bytes.</param>
/// <returns>Checksum byte sequence (first 4 bytes of 2x SHA256).</returns>
private byte[] CalculateCheckSum(byte[] data)
{
if (data == null)
{
throw new ArgumentNullException(nameof(data), "Cannot calculate checksum of null input!");
}
return(HashFunctions.ComputeDoubleSha256(data).SubArray(0, CheckSumSize));
}
public string GetWitnessTransactionID()
{
return(HashFunctions.ComputeDoubleSha256(Serialize()).Reverse().ToArray().ToBase16());
}
public string GetTransactionID()
{
byte[] bytesToHash = (Flag == 1) ? SerializeWithoutWitness() : Serialize();
return(HashFunctions.ComputeDoubleSha256(bytesToHash).Reverse().ToArray().ToBase16());
}