{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How do you verify the signature of an off-chain message in a blockchain?","a":"First, understand the signature mechanism of the off-chain message. Common signature algorithms include digital signature algorithms (such as RSA, DSA, etc.) and elliptic curve digital  signature algorithms (such as ECDSA, SECG, etc.)."}]}],"pr":"aefc352592c2541b4bdc45501199efeeb787ce5e03134fbd992540979916e6a6"}