Data structure reading methods and apparatuses, data structure update methods and apparatuses, and electronic devices

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

• obtaining, by a blockchain node in a blockchain network, an invoking request for a first smart contract based on receiving a data structure update transaction, wherein the data structure update transaction i) is used to change data structure of a set of data included in a second smart contract, and ii) comprises a first input parameter indicating an updated data structure, wherein the second smart contract comprises pre-update metadata and the set of data, the set of data being in a first data structure prior to the data structure update transaction, the pre-update metadata being metadata of the set of data prior to the data structure update transaction;
• obtaining, by the blockchain node from the data structure update transaction, the updated data structure that is based on a computer programming language and indicated by the first input parameter;
• running, by the blockchain node, first contract code comprised in the first smart contract, comprising:
• parsing the updated data structure;
• and
• converting the updated data structure characterized by the computer programming language into updated metadata characterized by a definition description language;
• invoking, by the blockchain node through the first smart contract, the second smart contract using the updated metadata as a second input parameter for invoking the second smart contract;
• and
• running, by the blockchain node, second contract code in the second smart contract using the second input parameter indicating the updated metadata, comprising:
• replacing the pre-update metadata included in the second smart contract with the updated metadata that is characterized by the definition description language and indicated by the second input parameter;
• parsing the updated metadata in the second smart contract to obtain a parsing result;
• and
• updating the first data structure of the set of data in the second smart contract into a second data structure based on the parsing result, wherein the second data structure is i) described by the updated metadata indicated by the second input parameter and ii) corresponding to the first input parameter, indicating the updated data structure, of the data structure update transaction.

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:
• obtaining, by a blockchain node in a blockchain network, an invoking request for a first smart contract based on receiving a data structure update transaction, wherein the data structure update transaction i) is used to change data structure of a set of data included in a second smart contract, and ii) comprises a first input parameter indicating an updated data structure, wherein the second smart contract comprises pre-update metadata and the set of data, the set of data being in a first data structure prior to the data structure update transaction, the pre-update metadata being metadata of the set of data prior to the data structure update transaction;
• obtaining, by the blockchain node from the data structure update transaction, the updated data structure that is based on a computer programming language and indicated by the first input parameter;
• running, by the blockchain node, first contract code comprised in the first smart contract, comprising:
• parsing the updated data structure;
• and
• converting the updated data structure characterized by the computer programming language into updated metadata characterized by a definition description language;
• invoking, by the blockchain node through the first smart contract, the second smart contract using the updated metadata as a second input parameter for invoking the second smart contract;
• and
• running, by the blockchain node, second contract code in the second smart contract using the second input parameter indicating the updated metadata, comprising:
• replacing the pre-update metadata included in the second smart contract with the updated metadata that is characterized by the definition description language and indicated by the second input parameter;
• parsing the updated metadata in the second smart contract to obtain a parsing result;
• and
• updating the first data structure of the set of data in the second smart contract into a second data structure based on the parsing result, wherein the second data structure is i) described by the updated metadata indicated by the second input parameter and ii) corresponding to the first input parameter, indicating the updated data structure, of the data structure update transaction.