{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the current transaction versions of blockchain?","a":"Bitcoin: Bitcoin is the first successful blockchain project, established in 2009. It adopts the Proof of Work (PoW) consensus algorithm to ensure  the security and stability of the network. The transaction version of Bitcoin is constantly updated, and the current main versions are 1.0, 2.0, and 3.0."}]}],"pr":"71e747d697c8c99dbb53343d6caf917b0490d91cbdb877e01663582804040107"}