{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What interfaces does the evidence module need to implement in a blockchain?","a":"Data upload and storage: Support users to upload various  evidence files and encrypt and securely store the files."}]}],"pr":"0c3cb3610624bbc577fdf45221e7a55ec419fe9a5a48bd5bfc432b1af9f29fa0"}