internal static string Encode(byte prefixbyte, bool seed, byte[] src)
{
if (!IsValidPublicPrefixByte(prefixbyte))
{
throw new NATSException("Invalid prefix");
}
if (src.Length != 32)
{
throw new NATSException("Invalid seed size");
}
MemoryStream stream = new MemoryStream();
if (seed)
{
// In order to make this human printable for both bytes, we need to do a little
// bit manipulation to setup for base32 encoding which takes 5 bits at a time.
byte b1 = (byte)(PrefixByteSeed | (prefixbyte >> 5));
byte b2 = (byte)((prefixbyte & 31) << 3); // 31 = 00011111
stream.WriteByte(b1);
stream.WriteByte(b2);
}
else
{
stream.WriteByte(prefixbyte);
}
// write payload
stream.Write(src, 0, src.Length);
// Calculate and write crc16 checksum
byte[] checksum = BitConverter.GetBytes(Crc16.Checksum(stream.ToArray()));
stream.Write(checksum, 0, checksum.Length);
return(Base32.Encode(stream.ToArray()));
}