{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"The expiration time for block hash is how long?","a":"The expiration time of block hashing does not have a fixed standard and is affected by various factors, such as the consensus mechanism of the blockchain network and the generation speed of blocks. Taking Ethereum as an example, its block generation speed is  approximately 15 seconds per block, and each block contains about 50-100 transactions. Ethereum's current block reward is 3.5676 ETH, which means that approximately 10,000-20,000 RMB in value for each block based on the current Ethereum price. However, these data will change over time and with the fluctuations in network conditions, so it is impossible to provide an exact expiration time."}]}],"pr":"74512b06054344ca7dd2442a72f41b8c202e976fd993d027d27dc7532932511c"}