{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the main concepts in the Evidence module within the blockchain?","a":"Block Header: The block header is an important component of each block, containing information such as the version number, timestamp, difficulty  coefficient, and hash value of the previous block header. The block header is used to ensure the integrity between blocks."}]}],"pr":"a6005c15a4ea3afbd446526781485f5ae9c85fca2f1c313bf81986e7c1eab561"}