How did the framework narrator of The notorious jumping frog of calaveras county use irony?

The framework narrator in "The Notorious Jumping Frog of Calaveras County" uses irony by presenting the story as a straightforward account of a frog-jumping contest, while the actual focus of the tale is on the mischievous antics of the characters involved. This discrepancy between expectations and reality creates irony, as the reader realizes the humorous and unexpected nature of the story.