{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What is the purpose of the Merkle tree in a blockchain?","a":"The Merkle tree in blockchain is mainly used for quickly summarizing and validating the  integrity of block data. It groups the data in the blockchain, performs hash operations on it, and continuously recursively calculates to generate new hash nodes, eventually leaving only one Merkle root. This Merkle root is stored in the block header so that verifiers can quickly confirm whether the transactions in the block are valid. With the Merkle tree, all transactions in a block can be verified in a short period of time, thereby improving the efficiency and security of the blockchain system."}]}],"pr":"be23d6b36105c71aeb4a0e42c59c061fec7e9760d11e01dc8be6f33bb8bb0686"}