Method and device for control of blockchain data access based on smart contract

A device for control of blockchain data access based on a smart contract, comprising:

• a transceiver, configured to obtain an access operation request of an institution, wherein the access operation request includes a transaction identifier of a transaction to be accessed;
• and
• a processor, configured to determine a blockchain state corresponding to the transaction identifier according to the transaction identifier, wherein the blockchain state includes a hash value of a transaction corresponding to the last time change of the blockchain state, and to perform data access control on the institution according to the hash value of the transaction corresponding to the last time change of the blockchain state and the identifier of the institution, obtaining control result,
• wherein when performing the data access control, the processor is further configured to:
• according to the hash value of the transaction corresponding to the last time change of the blockchain state, determine a timestamp of the block corresponding to the hash value;
• according to the identifier of the institution, determine a timestamp of the configuration block of the institution;
• determine whether the timestamp of the configuration block of the institution is earlier than the timestamp of the block corresponding to the hash value;
• and
• when the timestamp of the configuration block of the institution is earlier than the timestamp of the block corresponding to the hash value, execute an access operation of the institution, and determine result of the access operation as the control result, and when the timestamp of the configuration block of the institution is not earlier than the timestamp of the block corresponding to the hash value, determine that the institution is not authorized to access the transaction, and determine access denial information as the control result;
• and
• the transceiver is further configured to transmit the control result to the institution.

A non-transitory computer-readable storage medium, comprising one or more computer-readable instructions, wherein:

• when a blockchain node reads and executes the one or more computer-readable instructions, the blockchain node executes the following operations:
• obtaining an access operation request of an institution, wherein the access operation request includes a transaction identifier of a transaction to be accessed;
• according to the transaction identifier, determining a blockchain state corresponding to the transaction identifier, wherein the blockchain state includes a hash value of a transaction corresponding to a last time change of the blockchain state;
• according to the hash value of the transaction corresponding to the last time change in the blockchain state and an identifier of the institution, performing data access control on the institution to obtain a control result, wherein performing the data access control comprises:
• according to the hash value of the transaction corresponding to the last time change in the blockchain state, determining a timestamp of a block corresponding to the hash value;
• according to the identifier of the institution, determining a timestamp of a configuration block of the institution;
• determining whether the timestamp of the configuration block of the institution is earlier than the timestamp of the block corresponding to the hash value;
• and
• when the timestamp of the configuration block of the institution is earlier than the timestamp of the block corresponding to the hash value, executing an access operation of the institution, determining result of the access operation as the control result, and when the timestamp of the configuration block of the institution is not earlier than the timestamp of the block corresponding to the hash value, determining that the institution is not authorized to access the transaction, and determining access denial information as the control result;
• and
• transmitting the control result to the institution.