sign method

Future<SigningResult> sign(User user, Uint8List message, String pin)

Creates a cryptographic signature for a given document hash.

This method requires the user's PIN for authorization and, upon success, returns a SigningResult object containing the signature and timestamp.

Parameters:

• message: The hash of the document to be signed.
• user: The registered User performing the signature.
• pin: The user's PIN.

Throws SigningException if the signing process fails for any reason (e.g., incorrect PIN, revoked user).

Implementation

Future<SigningResult> sign(User user, Uint8List message, String pin) async {
  try {
    final mUser = user._toMUser();

    final mSigningResult = await _sdk.sign(mUser, message, pin);
    final signingResult = mSigningResult._toSigningResult();
    return signingResult;
  } on PlatformException catch(e) {
    final exceptionCode = e._getExceptionCode();
    if (exceptionCode is MSigningExceptionCode) {
      throw SigningException._create(
        exceptionCode.toSigningExceptionCode(),
        e.details["error"]
      );
    } else {
      rethrow;
    }
  }
}