Blockchain-based data processing method and device

A non-transitory, computer-readable medium storing one or more instructions executable by a computer system to perform operations comprising:

• receiving, by a blockchain node, transaction data and formatted information corresponding to the transaction data;
• determining, by the blockchain node and based on a transaction type corresponding to the transaction data and a predetermined relationship between the transaction type and a processing policy, a processing policy corresponding to the transaction data, wherein the processing policy comprises a data attribute used for conversion and a conversion rule corresponding to the data attribute;
• converting, by the blockchain node, the formatted information into an attribute value based on the conversion rule;
• determining a data attribute corresponding to the attribute value;
• and
• verifying, by the blockchain node, received transaction data based on the attribute value of the data attribute and the attribute value of the data attribute.

A computer-implemented system, comprising:

• one or more computers;
• and
• one or more computer memory devices interoperably coupled with the one or more computers and having tangible, non-transitory, machine-readable media storing one or more instructions that, when executed by the one or more computers, perform one or more operations comprising:
• receiving, by a blockchain node, transaction data and formatted information corresponding to the transaction data;
• determining, by the blockchain node and based on a transaction type corresponding to the transaction data and a predetermined relationship between the transaction type and a processing policy, a processing policy corresponding to the transaction data, wherein the processing policy comprises a data attribute used for conversion and a conversion rule corresponding to the data attribute;
• converting, by the blockchain node, the formatted information into an attribute value based on the conversion rule;
• determining a data attribute corresponding to the attribute value;
• and
• verifying, by the blockchain node, received transaction data based on the attribute value of the data attribute and the attribute value of the data attribute.