detached static method
Signs the message using the secret key and returns a signature.
Implementation
static Uint8List detached(Uint8List message, Uint8List secretKey) {
Uint8List? signedMsg = sign(message, secretKey);
Uint8List sig = Uint8List(signatureLength);
for (int i = 0; i < sig.length; i++) sig[i] = signedMsg![i];
return sig;
}