Cross-chain transaction processing method and apparatus, electronic device, and storage medium

A blockchain system implemented on a computer network system, the blockchain system including a first node cluster, a second node cluster and a registration device, wherein the first node cluster includes a first plurality of node devices, a first gateway device, and a first verification node device, and the second node cluster includes a second plurality of node devices, a second gateway device, and a second verification node device, the first plurality of node devices in the first node cluster maintaining a first blockchain and the second plurality of node devices in the second node cluster maintaining a second blockchain configured to implement a cross-chain transaction processing method including:

• receiving, at a first node device in the first node cluster, a cross-chain transaction request of a terminal, the cross-chain transaction request instructing a cross-chain transaction to be performed between the first blockchain and the second blockchain;
• running, at the first node device, a first service contract on the first blockchain based on the cross-chain transaction request, wherein the first service contract indicates a first execution manner for the cross-chain transaction on the first blockchain;
• executing, at the first node device and through the first service contract, a first transaction event of the cross-chain transaction to obtain first cross-chain transaction data;
• running, at the first node device, a first cross-chain contract on the first blockchain in the first execution manner to determine a second transaction event of the cross-chain transaction to be performed at the second blockchain, wherein the first cross-chain contract indicates a second execution manner for the cross-chain transaction on the second blockchain;
• storing, at the first node device, the first cross-chain transaction data to the first blockchain through the first service contract, the first cross-chain transaction data indicating that the first transaction event is already executed on the first blockchain;
• receiving, at the first gateway device, the first cross-chain transaction data from the first blockchain and a digital signature of the first cross-chain transaction data from the first verification node device, respectively;
• sending, at the first gateway device, the first cross-chain transaction data and the digital signature of the first cross-chain transaction data to the second gateway device;
• receiving, at the second node device, the first cross-chain transaction data and the digital signature of the first cross-chain transaction data from the second gateway device;
• running, at the second node device, a second cross-chain contract on the second blockchain in the second execution manner corresponding to the second transaction event of the cross-chain transaction in accordance with the first cross-chain transaction data and the digital signature of the first cross-chain transaction data;
• receiving, at a first node device in the first node cluster, a cross-chain transaction request of a terminal, the cross-chain transaction request including transaction information of a cross-chain transaction, an identifier of a first service contract on the first blockchain, and an identifier of a second service contract on the second blockchain, and the transaction information including positions of to-be-modified data on the first blockchain and the second blockchain and modified data of the to-be-modified data on the first blockchain and the second blockchain;
• running, at the first node device, a first service contract on the first blockchain based on the cross-chain transaction request, wherein the first service contract indicates a first execution manner for the cross-chain transaction on the first blockchain, further including:
• obtaining the first service contract from the first blockchain based on the identifier of the first service contract on the first blockchain;
• inputting the cross-chain transaction request to the first service contract as an input parameter;
• executing, through the first service contract, a first transaction event of the cross-chain transaction to obtain first cross-chain transaction data, the first cross-chain transaction data including the identifier of the second service contract on the second blockchain;
• calling a first cross-chain contract on the first blockchain in the first execution manner to determine a second transaction event of the cross-chain transaction to be performed at the second blockchain, wherein the first cross-chain contract indicates a second execution manner for the cross-chain transaction on the second blockchain;
• and
• storing the first cross-chain transaction data to the first blockchain through the first service contract, the first cross-chain transaction data indicating that the first transaction event is already executed on the first blockchain;
• receiving, at the first gateway device, the first cross-chain transaction data from the first blockchain and a digital signature of the first cross-chain transaction data from the first verification node device, respectively;
• sending, at the first gateway device, the first cross-chain transaction data and the digital signature of the first cross-chain transaction data to the second gateway device;
• receiving, at the second node device, the first cross-chain transaction data and the digital signature of the first cross-chain transaction data from the second gateway device;
• running, at the second node device, a second cross-chain contract on the second blockchain in the second execution manner corresponding to the second transaction event of the cross-chain transaction in accordance with the first cross-chain transaction data and the digital signature of the first cross-chain transaction data, further including:
• obtaining the second service contract from the second blockchain based on the identifier of the second service contract on the second blockchain;
• verifying validity of the first cross-chain transaction data of the cross-chain transaction on the second blockchain based on the digital signature of the first cross-chain transaction data;
• executing the second cross-chain contract of the second blockchain based on the first cross-chain transaction data;
• executing, through the second service contract, the second transaction event of the cross-chain transaction based on the first cross-chain transaction data to obtain second cross-chain transaction data;
• storing second cross-chain transaction data corresponding to the second transaction event of the cross-chain transaction to the second blockchain, the second cross-chain transaction data indicating that the second transaction event is already executed on the second blockchain;
• obtaining, at the second gateway device, the second cross-chain transaction data from the second blockchain;
• receiving, at the second gateway device, the second cross-chain transaction data from the second blockchain and a digital signature of the second cross-chain transaction data from the second verification node device, respectively;
• sending, at the second gateway device, the second cross-chain transaction data and the digital signature of the second cross-chain transaction data to the first gateway device;
• obtaining, by the first node device, the second cross-chain transaction data from the second blockchain based on the first cross-chain transaction data through the first gateway device;
• and
• sending, by the first node device, a transaction completion response to the terminal through the first service contract and the first cross-chain contract, the transaction completion response indicating that the cross-chain transaction is already completed.

A non-transitory computer-readable storage medium, storing at least one computer program that, when executed by a computer network system acting as a blockchain system including a first node cluster, a second node cluster and a registration device, wherein the first node cluster includes a first plurality of node devices, a first gateway device, and a first verification node device, and the second node cluster includes a second plurality of node devices, a second gateway device, and a second verification node device, the first plurality of node devices in the first node cluster maintaining a first blockchain and the second plurality of node devices in the second node cluster maintaining a second blockchain, causes the blockchain system to perform a cross-chain transaction processing method including:

• receiving, at a first node device in the first node cluster, a cross-chain transaction request of a terminal, the cross-chain transaction request including transaction information of a cross-chain transaction, an identifier of a first service contract on the first blockchain, and an identifier of a second service contract on the second blockchain, and the transaction information including positions of to-be-modified data on the first blockchain and the second blockchain and modified data of the to-be-modified data on the first blockchain and the second blockchain;
• running, at the first node device, a first service contract on the first blockchain based on the cross-chain transaction request, wherein the first service contract indicates a first execution manner for the cross-chain transaction on the first blockchain, further including:
• obtaining the first service contract from the first blockchain based on the identifier of the first service contract on the first blockchain;
• inputting the cross-chain transaction request to the first service contract as an input parameter;
• executing, through the first service contract, a first transaction event of the cross-chain transaction to obtain first cross-chain transaction data, the first cross-chain transaction data including the identifier of the second service contract on the second blockchain;
• calling a first cross-chain contract on the first blockchain to determine a second transaction event of the cross-chain transaction to be performed at the second blockchain, wherein the first cross-chain contract indicates a second execution manner for the cross-chain transaction on the second blockchain;
• and
• storing the first cross-chain transaction data to the first blockchain through the first service contract, the first cross-chain transaction data indicating that the first transaction event is already executed on the first blockchain;
• receiving, at the first gateway device, the first cross-chain transaction data from the first blockchain and a digital signature of the first cross-chain transaction data from the first verification node device, respectively;
• sending, at the first gateway device, the first cross-chain transaction data and the digital signature of the first cross-chain transaction data to the second gateway device;
• receiving, at the second node device, the first cross-chain transaction data and the digital signature of the first cross-chain transaction data from the second gateway device;
• running, at the second node device, a second cross-chain contract on the second blockchain in the second execution manner corresponding to the second transaction event of the cross-chain transaction in accordance with the first cross-chain transaction data and the digital signature of the first cross-chain transaction data, further including:
• obtaining the second service contract from the second blockchain based on the identifier of the second service contract on the second blockchain;
• verifying validity of the first cross-chain transaction data of the cross-chain transaction on the second blockchain based on the digital signature of the first cross-chain transaction data;
• executing the second cross-chain contract of the second blockchain based on the first cross-chain transaction data;
• executing, through the second service contract, the second transaction event of the cross-chain transaction based on the first cross-chain transaction data to obtain second cross-chain transaction data;
• storing second cross-chain transaction data corresponding to the second transaction event of the cross-chain transaction to the second blockchain, the second cross-chain transaction data indicating that the second transaction event is already executed on the second blockchain;
• obtaining, at the second gateway device, the second cross-chain transaction data from the second blockchain;
• receiving, at the second gateway device, the second cross-chain transaction data from the second blockchain and a digital signature of the second cross-chain transaction data from the second verification node device, respectively;
• sending, at the second gateway device, the second cross-chain transaction data and the digital signature of the second cross-chain transaction data to the first gateway device;
• obtaining, by the first node device, the second cross-chain transaction data from the second blockchain based on the first cross-chain transaction data through the first gateway device;
• and
• sending, by the first node device, a transaction completion response to the terminal through the first service contract and the first cross-chain contract, the transaction completion response indicating that the cross-chain transaction is already completed.