public static string EncodeBase58Check(byte[] data)
{
if (data == null)
{
throw new ArgumentNullException(nameof(data));
}
// Calculate checksum (First 4 bytes of Double SHA256 of data)
byte[] checksum = CalculateChecksum(data);
// Concatenate data and checksum
byte[] dataToEncode = ByteArrayUtilities.ConcatenateByteArrays(data, checksum);
// Encode Base58 and return
return(EncodeBase58(dataToEncode));
}
public static byte[] DecodeBase58Check(string base58String)
{
byte[] bytes = DecodeBase58(base58String);
byte[] checksum = new byte[4];
Buffer.BlockCopy(bytes, bytes.Length - checksum.Length, checksum, 0, checksum.Length);
byte[] data = new byte[bytes.Length - checksum.Length];
Buffer.BlockCopy(bytes, 0, data, 0, data.Length);
byte[] calculatedChecksum = CalculateChecksum(data);
if (!ByteArrayUtilities.CompareByteArrays(checksum, calculatedChecksum))
{
throw new Exception("Checksum failure");
}
return(data);
}