Blockchain transaction processing method, related device, and medium

A blockchain node in a blockchain, the blockchain node comprising a memory for storing computer instructions and a processor in communication with the memory, wherein, when the processor executes the computer instructions, the processor is configured to cause the blockchain node to:

• receive, from a target relay node, a transaction request and a first signature of the transaction request, the first signature being generated by signing the transaction request using a first signature algorithm of the blockchain node, the transaction request comprising a transaction sub-request received by the target relay node from a terminal, the transaction sub-request having a second signature, and the second signature being generated by using a second signature algorithm in a terminal contract of the terminal;
• perform first signature verification on the first signature by using the first signature algorithm;
• invoke a relay contract of the target relay node after determining that the first signature verification succeeds, to obtain a transaction sub-request from the transaction request based on the relay contract;
• and
• invoke the terminal contract of the terminal corresponding to the transaction sub-request, to perform second signature verification on the transaction sub-request by using the second signature algorithm in the terminal contract.

A non-transitory storage medium for storing computer readable instructions, the computer readable instructions, when executed by a processor in a blockchain node in a blockchain, causing the processor to:

• receive, from a target relay node, a transaction request and a first signature of the transaction request, the first signature being generated by signing the transaction request using a first signature algorithm of the blockchain node, the transaction request comprising a transaction sub-request received by the target relay node from a terminal, the transaction sub-request having a second signature, and the second signature being generated by using a second signature algorithm in a terminal contract of the terminal;
• perform first signature verification on the first signature by using the first signature algorithm;
• invoke a relay contract of the target relay node after determining that the first signature verification succeeds, to obtain a transaction sub-request from the transaction request based on the relay contract;
• and
• invoke the terminal contract of the terminal corresponding to the transaction sub-request, to perform second signature verification on the transaction sub-request by using the second signature algorithm in the terminal contract.