Method and device for avoiding double-spending problem in read-write set-model-based blockchain technology

A non-transitory, computer-readable storage medium storing one or more instructions that, when executed by a computer system, causes the computer system to perform operations for avoiding double-spending in blockchain transactions of a blockchain, the operations comprising:

• receiving instructions to execute two or more blockchain transactions each for transferring a respective amount of blockchain assets from an account of a user,;
• determining that the account of the user is a frequent concurrent transaction account from which frequent concurrent transactions are initiated;
• selecting, from among multiple data verification processes, a first data verification process for the two or more blockchain transactions based on the account of the user;
• and
• for each blockchain transaction from the two or more blockchain transactions:
• pre-executing a smart contract associated with the blockchain transaction and performing a logical verification on the blockchain transaction that initially validates that a first balance of the account of the user is greater than or equal to the respective amount of blockchain assets being transferred from the account of the user by the blockchain transaction;
• generating, and based on the account of the user, a modified smart contract for the blockchain transaction, wherein generating comprises
• generating an instruction indicating the respective amount of blockchain assets is being transferred from the account of the user,
• adding the instruction to the modified smart contract;
• and
• transmitting the modified smart contract to one or more data verification computers.

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 for avoiding double-spending in blockchain transactions of a blockchain, the operations comprising:
• receiving instructions to execute two or more blockchain transactions each for transferring a respective amount of blockchain assets from an account of a user,;
• determining that the account of the user is a frequent concurrent transaction account from which frequent concurrent transactions are initiated;
• selecting, from among multiple data verification processes, a first data verification process for the two or more blockchain transactions based on the account of the user;
• and
• for each blockchain transaction from the two or more blockchain transactions:
• pre-executing a smart contract associated with the blockchain transaction and performing a logical verification on the blockchain transaction that initially validates that a first balance of the account of the user is greater than or equal to the respective amount of blockchain assets being transferred from the account of the user by the blockchain transaction;
• generating, and based on the account of the user, a modified smart contract for the blockchain transaction, wherein generating comprises
• generating an instruction indicating the respective amount of blockchain assets is being transferred from the account of the user,
• adding the instruction to the modified smart contract and
• transmitting the modified smart contract to one or more data verification computers.