Blockchain transaction execution method and apparatus, program product, device, and medium

A blockchain transaction execution apparatus, the apparatus comprising:

• a proxy program component, the proxy program component comprising:
• a first processor;
• a first memory that stores first computer-readable instructions which, when executed by the first processor, cause the first processor to perform operations to:
• receive a second transaction initiated by an application associated with a second blockchain, the second transaction having a second data format conforming to the second blockchain;
• assemble a first transaction in a first data format, wherein the first transaction that includes the second transaction and a proxy contract identifier for processing via a first blockchain, the first data format of the first transaction being different from the second data format of the second transaction;
• and
• transmit the first transaction to a blockchain node of the first blockchain;
• the blockchain node of the first blockchain, the blockchain node of the first blockchain comprising:
• a second processor;
• a second memory that stores second computer-readable instructions which, when executed by the second processor, cause the second processor to perform operations to:
• receive the first transaction from the proxy program component;
• extract based on the proxy contract identifier, the second transaction from the first transaction;
• invoke based on the proxy contract identifier, a virtual machine that is configured to execute transactions of the second blockchain having the second data format, the virtual machine being preconfigured to execute the extracted second transaction in the second blockchain format of the second blockchain;
• generate, via the virtual machine, a transaction receipt conforming to the second data format of the second blockchain;
• and
• transmit the transaction receipt to the application associated with the second blockchain via the proxy program component.