{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How to confirm the software version running on the testing and validation nodes in a blockchain?","a":"When a node joins the blockchain network,  it generates a digital signature to prove its identity and the authenticity of its software version. This digital signature is contained in all messages sent by the node."}]}],"pr":"ad19bf794495b45c42550453726d7b551003c485138af80c5bc549dd7bc5decf"}