{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the parameters of the debug_traceBlockByNumber method in blockchain?","a":"callback: Optional parameter, a callback function executed when the query is  successful. It receives a Block object as an argument for handling the retrieved block information."}]}],"pr":"9308185a6c5a869747d37fa36f0785c6bf60c20bf8d3fe465a4abd311ac3aeae"}