{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How can I obtain evidence of a specific hash value through gRPC?","a":"First, ensure that your gRPC service defines the required interface. For example, create an interface  named `GetHash Evidence`, which contains a method that accepts a file as input and returns its hash value."}]}],"pr":"4ffa291e7c20d75f807de1ffe408ebada3106015dfa255773df20c2d7cfed74a"}