signature_validate_async
Description:
[ Version ( since = "21.12.0" ) ]
public async SignatureInfo signature_validate_async (SignatureValidationFlags flags, Cancellable? cancellable) throws Error
  public async SignatureInfo signature_validate_async (SignatureValidationFlags flags, Cancellable? cancellable) throws Error
Asynchronously validates the cryptographic signature contained in signature_field.
Parameters:
| this | 
           a FormField that represents a signature annotation  | 
      
| flags | 
           SignatureValidationFlags flags influencing process of validation of the field signature  | 
      
| cancellable | 
           optional Cancellable object  | 
      
| callback | 
           a TaskReadyCallback to call when the signature is validated  | 
      
| user_data | 
           the data to pass to callback function  |